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HEAD

Subclass of:

360 - Dynamic magnetic information storage or retrieval

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
360313000 Magnetoresistive (MR) reproducing head 502
360125010 Core 103
360123010 Coil 89
360122000 Head surface structure 50
360128000 Head accessory 35
360119010 Gap spacer 19
360121000 Plural gaps 9
360328000 Magnetostrictive head 6
360118000 Erase 3
20100079912MAGNETIC RECORDING DEVICE AND MAGNETIC RECORDING METHOD - A magnetic recording device includes a write head, a perpendicular magnetic recording medium, a recording-current generating circuit, and a setting circuit. The perpendicular magnetic recording medium includes a plurality of tracks that includes a recording track. The recording-current generating circuit generates a recording electric current. The write head supplied with the recording current writes a recording data pattern on the recording track. The setting circuit sets a value of the recording electric current such that the value of the recording electric current decreases as a magnitude of side erase effect on at least one track of the tracks adjacent to the recording track increases.04-01-2010
20090190255Method and for wide track erasure in a hard disk drive - A hard disk drive is disclosed with a slider including a wide track eraser for erasing neighboring tracks and the servo patterning around a track on the accessed disk surface. Using the wide track eraser reduces the time to erase a disk surface by at least a factor of N, where N is at least 4, and may preferably be successively larger to at least 64. Embodiments include the slider, a head gimbal assembly, a main flex circuit, an integrated circuit for the main flex circuit for stimulating the wide track eraser, a head stack assembly including the main flex circuit coupling through the head gimbal assembly to the wide track eraser, a control circuit, and a processor within the control circuit controlling the stimulus of the wide track eraser to erase part or all of a disk surface.07-30-2009
20090067087APPARATUSES AND METHODS FOR PRE-ERASING DURING MANUFACTURE OF MAGNETIC TAPE - The present invention relates to direct current (“DC”) pre-erasing servo channels of a magnetic tape prior to writing servo data in a servo channel. The present invention particularly relates to those servo recordings which were written with a uni-polar current waveform. The DC pre-erase is performed using a uni-polar direct current of a polarity that is opposite to the polarity of the direct current used to write the servo data. This pre-erase may be done with one or more heads. Also, as will be described, the pre-erase of a servo channel and writing to a servo channel may be done by making two passes over a single head or by using two or more heads to perform both steps. Also, it is within the scope of the present invention to have the heads mounted on a single mount or have the heads on separate mounts and on separate tape decks.03-12-2009
360112000 Hall effect 3
20090316301MAGNETIC FIELD SENSOR FOR PATTERNED MEDIA - An apparatus for sensing magnetic domains in a patterned media that includes a first sensing element and a second sensing element in electrical communication with the first sensing element. The first sensing element has an output voltage lead and the second sensing element has an output voltage lead. The patterned media may be a bit patterned media or a track patterned media.12-24-2009
20100061014Magnetic Reproducing Element Using Anomalous Hall Effect and Magnetic Head Using the Same - According to one embodiment, magnetic reproducing element for detecting a magnetic field from a magnetic recording medium comprises a sensor film including a perpendicular magnetization film having a magnetization easy axis in a direction perpendicular to a film plane, wherein magnetization in the sensor film tilts upward or downward in an element height direction from the magnetization easy axis while no magnetic field is applied from the magnetic recording medium, and change in anomalous Hall voltage generated in the sensor film is detected, thereby allowing the magnetic field applied from the magnetic recording medium to be detected. Other magnetic reproducing elements and magnetic heads employing magnetic reproducing elements are described as well.03-11-2010
20090141396ELECTRIC FIELD EFFECT READ/WRITE HEAD, METHOD OF MANUFACTURING THE SAME, AND ELECTRIC FIELD EFFECT STORAGE APPARATUS HAVING THE SAME - An electric field effect read/write head for recording/reproducing information on/from a ferroelectric recording medium using an electric field effect includes a semiconductor substrate, a recess portion formed in an upper surface of the semiconductor substrate facing the ferroelectric recording medium, and a recording/reproduction portion provided in the recess portion.06-04-2009
360111000 Flux gate 1
20080239567Magnetic head for perpendicular magnetic recording and method of manufacturing same - A pole layer has a track width defining portion and a wide portion. The pole layer has: first and second side surfaces located opposite to each other in a first region extending from a medium facing surface to a position at a distance of 10 to 300 nm from the medium facing surface; third and fourth side surfaces located in a second region other than the first region; a fifth side surface located at the boundary between the first and second regions and connecting the first and third side surfaces to each other; and a sixth side surface located at the boundary between the first and second regions and connecting the second and fourth side surfaces to each other. The distance between the first and second side surfaces taken in the track width direction decreases with decreasing distance from the top surface of the substrate. The angle formed by the third and fourth side surfaces with respect to the direction orthogonal to the top surface of the substrate is smaller than that formed by the first and second side surfaces with respect to the direction orthogonal to the top surface of the substrate.10-02-2008
360114010 Read only detector using light for reading magnetically recorded information on tape 1
20110096435Heat-assisted magnetic recording head with laser diode fixed to slider - A heat-assisted magnetic recording head includes a slider, an edge-emitting laser diode fixed to the slider, and an external mirror fixed to the laser diode. The laser diode has an emitting end face that includes an emission part for emitting laser light; a mounting surface that lies at an end in a direction perpendicular to the plane of an active layer and faces the slider; and a rear surface opposite to the mounting surface. The external mirror includes: a first to-be-fixed part disposed along the emitting end face; a second to-be-fixed part disposed along the rear surface; and a coupling part that couples the first and second to-be-fixed parts to each other. The first to-be-fixed part has a reflecting surface that reflects the laser light emitted from the emission part toward the waveguide.04-28-2011
Entries
DocumentTitleDate
20110181984MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING AND REPRODUCING APPARATUS, AND METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM - The recording layer is made of both magnetic particles containing Co, Cr, and Pt and a nonmagnetic material containing Cr present among the magnetic particles. The recording element has an uneven Cr distribution such that the ratio of the number of Cr atoms that constitute the recording element to the total number of Co, Cr, and Pt atoms that constitute the recording element is less at the sidewall portion of the recording element than at the center portion of the recording element. The relationships given by Expressions (I) and (II) below are satisfied;07-28-2011
20090195925PATTERNED MAGNETIC RECORDING MEDIA, STAMPER FOR MANUFACTURE OF PATTERNED MAGNETIC RECORDING MEDIA, METHOD OF MANUFACTURING PATTERNED MAGNETIC RECORDING MEDIA, AND MAGNETIC RECORDING/REPRODUCTION APPARATUS - According to one embodiment, a patterned magnetic recording media has a magnetic recording layer and a protective layer formed on a substrate, in which the magnetic recording layer including a magnetic material patterned in tracks and a nonmagnetic material filled in between the tracks in a data area, and has a recessed portion formed in an area within 1 mm from an outer media end and extending to the media end. The recessed portion being formed 1 to 50 nm deeper than the data area.08-06-2009
20100073816MAGNETIC HEAD AND METHOD OF MANUFACTURING THE SAME, LINEAR TAPE DRIVE APPARATUS, AND MAGNETIC RECORDING AND REPRODUCTION METHOD - An aspect of the present invention relates to a magnetic head employed in a linear tape drive in the form of a sliding-contact linear tape drive. The magnetic head comprises multiple indentations that are observed in a surface topographic image viewed by a scanning probe microscope on a surface (sliding contact surface) of sliding contact with a magnetic tape, and the multiple indentations satisfy (1) to (4) below: 03-25-2010
20100073814WRITING AND READING MULTI-LAYER CONTINUOUS MAGNETIC RECORDING MEDIA - A method and apparatus for writing magnetization states in a pair of magnetic layers of a multi-layer continuous magnetic recording medium and a method and apparatus for reading readback pulse shapes representing a magnetization state transition between such written magnetization states of a two-layer continuous magnetic recording medium. Writing each magnetization state includes selecting the magnetization state, determining a write current sufficient to write the magnetization state, and applying the write current to a magnetic write head to write the magnetization state by simultaneously writing associated magnetic states in each magnetic layer of the pair of magnetic layers. A readback pulse shape representing a written magnetization state transition is read. The written magnetization state transition is uniquely identified from the readback pulse shape of the transition or from both the readback pulse shape of the transition and the readback pulse shape of one or more next magnetization state transitions.03-25-2010
20100073813PERPENDICULAR MAGNETIC RECORDING MEDIA HAVING A CAP LAYER FORMED FROM A CoPtCr ALLOY - Perpendicular magnetic recording (PMR) media and methods of fabricating PMR media are described. The PMR media includes, among other layers, a perpendicular magnetic recording layer and a cap layer that are exchange coupled. The magnetic recording layer and the cap layer may be exchange coupled through direct contact, or may be exchange coupled over a coupling layer. In either embodiment, the cap layer is formed from a CoPtCr alloy having a concentration of Cr in the range of about 15-22 at %.03-25-2010
20130038965SELF-ALIGNED BEVELS FOR WRITE POLES - A method, including depositing a layer of material onto a base portion of a wafer, is disclosed. The layer of material has a first surface adjacent the base portion. The method also includes depositing a pattern of masking material onto a portion of a second surface of the layer. Material from the layer of material that is unprotected by the pattern of masking material is removed from the layer of material. By removing such material a portion of the layer of material is suspended from the base portion.02-14-2013
20100046115Method and Device for Identifying the Free Fall - A method and a device are described for preventing damage to a device as the result of a free fall. First a free fall of the device is identified, and a measure is then taken to protect the device from damage. The free fall is identified by detecting the ambient pressure. The device may have a hard disk in which the write/read head of the hard disk is parked and/or locked when the free fall is identified.02-25-2010
20100046116MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING DEVICE - The invention relates to a magnetic recording medium comprises a nonmagnetic substrate on which at least a soft magnetic under layer, an orientation adjusting layer that controls the orientation of a layer just thereon, a vertical magnetic layer with an axis of easy magnetization being mainly oriented vertically to the nonmagnetic substrate and a protective layer are disposed, the vertical magnetic layer is constituted of three or more layers including a lower layer, an intermediate layer and an upper layer from the substrate side, wherein the lower, intermediate and upper magnetic layers are constituted of magnetic particles which are columnar crystals extending continuously from the lower layer to the upper layer, the magnetic recording medium further comprises a nonmagnetic layer between the lower and intermediate magnetic layers or between the intermediate and upper magnetic layers, wherein the upper layer has a magnetic anisotropic constant (Ku) ranging from 0.8×1002-25-2010
20100103557Lubricant with non-terminal functional groups - Lubricant with non-terminal functional groups. The location of the functional groups minimizes free chain length and molecular weight of a lubricant while simultaneously maximizing evaporation temperature. The locations of the functional groups to the backbone of the molecule of the lubricant allows for shorter lengths of free backbone length between functional groups attached to a lubricated surface. The lubricant lubricates mechanical devices including hard disk drives.04-29-2010
20100110584Dual oxide recording sublayers in perpendicular recording media - A method is described for improving recording performance of a perpendicular media. The method includes using a dual oxide layer as a sublayer of a magnetic recording layer of the perpendicular media. The dual oxide sublayer improves recording performance, increases resistance to corrosion and allows for a thinner exchange break layer. The dual oxide layer generally includes oxides of tantalum and one of silicon or boron.05-06-2010
20090154009METHODS FOR FABRICATING PERPENDICULAR RECORDING HEADS WITH CONTROLLED SEPARATION REGIONS - Methods of recording head fabrication are provided to fabricate a region of separation material between a write pole and a shield of a write head that forms a controlled spacing between the write pole and the shield of the write head. The method comprises forming a mask structure having an opening exposing a write pole of the write head and forming separation material above the portions of the write pole exposed by the opening. The method further comprises removing the mask structure and forming a shield of the write head above the separation material. The separation material forms a spacing between the write pole and the shield, which controls the amount of flux from the write pole absorbed by a shield (e.g., a wrap around shield) of the write head.06-18-2009
20130027808MAGNETIC TAPE AND MAGNETIC RECORDING DEVICE - An aspect of the present invention relates to a magnetic tape comprising a magnetic layer containing a hexagonal ferrite magnetic powder and a binder on a nonmagnetic support, wherein a standard deviation σHk of a magnetic anisotropy constant Hk of the magnetic layer is equal to or less than 30%, and a magnetic interaction ΔM as calculated by equation (1) below falls within a range of −0.20≦ΔM≦−0.03: ΔM=(Id(H)+2Ir(H)−Ir(∞))/Ir(∞) . . . (1) wherein Id(H) denotes a residual magnetization measured with DC demagnetization, Ir(H) denotes a residual magnetization measured with AC demagnetization, and Ir(∞) denotes a residual magnetization measured at an applied magnetic field of 796 kA/m.01-31-2013
20090279206FABRICATION OF TRAPEZOIDAL POLE FOR MAGNETIC RECORDING - A method for forming a magnetic write pole with a trapezoidal cross-section is described. The method consists of first forming a magnetic seedlayer on a base followed by depositing a removable material layer on the seedlayer, and then a resist layer on the removable material layer. A trench is then formed in the resist, and the resist is heated to cause the cross-sectional profile of the trench to assume a trapezoidal shape. The resist is then capped with another resist layer and further heated to cause the width of the trapezoidal trench to become narrower. The cap layer and removable material layer at the bottom of the trench are then removed and the trench filled with magnetic material by electroplating. The resist and seedlayer external to the trench are finally removed to form a write pole with a trapezoidal cross-section.11-12-2009
20090303634ADVANCED HEATER-ASSISTED MEDIA BURNISHING HEAD MEDIA BURNISH PROCESS - A method and system for cleaning and/or burnishing an article. The article is operated on by a burnishing object having one more cutting edges and one or more heating surfaces. The article rotates relative to the burnishing head and the cutting edges remove asperities from the article. The heating surface can be activated and can optionally protrude from the burnishing head to further reduce roughness of the surface of the article as the article is rotating relative to the head. The cutting edges and heating surfaces can be configured in shape and size (i.e., geometry) to accommodate the article.12-10-2009
20130057980MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS - The strength of a magnetic field applied from a main pole to an oscillator and the strength of a magnetic field applied from the main pole to a recording medium are improved in a magnetic recording head for microwave assisted recording.03-07-2013
20110013316RECORDING HEAD HEATER SYSTEMS WITH TWO ELECTRICAL CONNECTIONS - Recording heads for a data storage system include a first diode, a second diode, and a first electrical component. The first electrical component is electrically connected in series to the first and second diodes. In another embodiment, recording heads include first, second, third, and fourth electrical connection points. A read transducer is electrically connected to the first and second electrical connection points. A write transducer is electrically connected to the first and third electrical connection points. A first heater and a second heater are electrically connected to the first and fourth electrical connection points.01-20-2011
20120170151MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCTION APPARATUS USING THE SAME - According to one embodiment, a recording track has a surface modification layer in the surface region. This surface modification layer has an anisotropic magnetic field Hk reduced from that of a region between adjacent recording tracks.07-05-2012
20090268343MAGNETIC HEAD AND STORAGE SYSTEM - A magnetic head in one embodiment includes a first array of writers interleaved with readers; a second array of writers interleaved with readers, the writers of the first array being generally aligned with the writers of the second array in a direction of media travel relative thereto, the readers of the first array being generally aligned with the readers of the second array in a direction of media travel relative thereto; and a third array of writers interleaved with readers, the third array being positioned between the first and second arrays, the writers of the third array being generally aligned with the readers of the first and second arrays in a direction of media travel relative thereto, the readers of the third array being generally aligned with the writers of the first and second arrays in a direction of media travel relative thereto. Other embodiments are also presented.10-29-2009
20130063840MAGNETIC HEAD AND MAGNETIC RECORDING AND REPRODUCING DEVICE - According to one embodiment, a magnetic head has a main magnetic pole, a write-shield constituting the main magnetic pole and a magnetic circuit, and a spin torque oscillation element provided between the main magnetic pole and the write-shield. The spin torque oscillation element is provided with a first oscillation layer, a nonmagnetic spin sink layer, a second oscillation layer, a nonmagnetic intermediate layer, and a spin injection layer provided in sequence from the write-shield side to the main magnetic pole side. The nonmagnetic spin sink layer is formed of at least one element selected from the group consisting of Ru, Rh, Ta, W, Cr, Ir, Mo, Re, Nb, Pt, and Pd.03-14-2013
20130163117Surface Treatment Method to Develope a Durable Wear Resistant Overcoat for Magnetic Recording Systems - A durable wear-resistant coating consists of an atomically mixed layer on the surface of the head or media which is developed by bombardment of the surface with energetic C ions with optimized parameters. This mixed layer is covered with a hard DLC overcoat. This mixed interlayer is able to strongly bond the overcoat to the head or media substrate and improve the tribological properties of the overcoat. In this method a very thin layer of a carbide former material can be used as an interlayer before bombarding the surface with C ions which provides a composite interlayer containing C and species from interlayer and substrate. This composite interlayer strongly bonds the DLC overact to the ceramic substrate of the head or the metallic substrate of the media. This interlayer by itself is protective enough to protect the head media of the hard drives against wear and corrosion.06-27-2013
20090237838MAGNETIC RECORDING MEDIA AND METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/REPRODUCTION DEVICE - A method of manufacturing magnetic recording media with a high areal recording density, in which there write bleeding during magnetic recording is eliminated by reducing insofar as possible the coercive force and remanent magnetization in areas between magnetic tracks, is provided. The method of manufacture can produce magnetic recording media 09-24-2009
20090237837MAGNETIC RECORDING HEAD - A method of fabricating a recording head includes depositing an insulator material onto at least a portion of a first member, wherein the insulator material forms an insulator film having a film thickness. The method further includes depositing a writer pole material onto the insulator film, wherein the writer pole material forms a writer pole member, and wherein the insulator film is between the writer pole member and a contact layer. Further, in some embodiments, the film thickness determines the distance between the writer pole member and the first contact member and also determines the distance between the writer pole member and the second contact member.09-24-2009
20090231756MULTI-CHANNEL TAPE HEAD HAVING ASYMMETRIC CHANNEL ARRAYS - A magnetic head comprises identical, opposing modules each comprising an array of paired data transducers, the transducers including data readers, data writers, or combinations thereof. For each array, the transducers in each subset may have about the same center to center spacing. A first subset of the transducers is operable for reading or writing data in a first tape format. A second subset of the transducers is operable for reading or writing data in a second tape format, with at least some of the transducers being present in both subsets. Also, each module includes a lone writer at one end of one of the subsets, a lone reader at an opposite end of the one of the subsets, and servo readers positioned outside the array.09-17-2009
20080204929FLUID DYNAMIC BEARING DEVICE, SPINDLE MOTOR INCLUDING THE SAME, READ-WRITE DEVICE, AND METHOD OF MANUFACTURING BEARING PART - An object of the present invention is to provide a method of manufacturing a fluid dynamic bearing device and a bearing part for a thrust bearing, both of which are applied to a flat and thin bearing part and are capable of preventing abrasion and scratching even if two parts make contact with each other. A fluid dynamic bearing mechanism 08-28-2008
20090195924Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus using the same - Embodiments of the present invention help allow accurate control of the magnetization reversal in a magnetic recording layer in small reversal units, whereby high-density recording can be achieved. According to one embodiment, by forming an intermediate layer having a granular structure similar to that of the magnetic recording layer below the magnetic recording layer, a continuous crystal grain boundary is formed at the interface between the magnetic recording layer and the intermediate layer, thereby preventing incomplete formation of the crystal grain boundary found in the initial growth layer of the magnetic recording layer. The intermediate layer comprises a non-magnetic alloy comprising Co and Cr as its main components and an oxide such as Al, Cr, Hf. Mg, Nb, Si, Ta, Ti and Zr. Further, the average content of the oxygen element in the intermediate layer is in the range from 6 at % to 20 at %.08-06-2009
20100202085MAGNETIC DISK DEVICE - In a magnetic disk device including a magnetic disk coated with a lubricant, a face of a magnetic head slider, at a trailing side of the slider, is constructed so that all or part of an outer region adjoining other faces is made less wettable than other regions present at the trailing side face. For example, the trailing side face 08-12-2010
20090207524TAPE HEADS FOR USE WITH MULTIPLE TAPE FORMATS - A magnetic head according to one embodiment includes an array of elements, the elements being selected from a group consisting of data readers, data writers, and combinations thereof; wherein a first subset of the elements is operable for reading or writing data in a first tape format, wherein a second subset of the elements is operable for reading or writing data in a second tape format, at least some of the elements being present in both subsets, wherein a number of servo bands supported in each of the formats is one more than a number of data bands on a medium written in the particular format.08-20-2009
20090207523MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING APPARATUS - A magnetic recording medium formed on a substrate. The magnetic recording medium includes a data region including a plurality of magnetic dots arranged at predetermined positions on the substrate, for recording information; and a servo region for specifying the positions of the magnetic dots, the servo region including a plurality of magnetic segments arranged at predetermined positions on the substrate, each of the magnetic segments being smaller than each of the magnetic dots.08-20-2009
20090290255METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIA, MAGNETIC RECORDING MEDIA AND MAGNETIC READ/WRITE DEVICE - A manufacturing method which is capable of easily and inexpensively manufacturing discrete track-type magnetic recording media is provided.11-26-2009
20110292544HEAD IC AND MAGNETIC DISK APPARATUS HAVING MICROWAVE ASSISTANCE FUNCTION - According to one embodiment, it is determined whether a STOAR element which performs microwave assistance for a magnetic disk apparatus is made to oscillate properly. When the STOAR element is oscillating when a current bias is applied, the resistance of the element increases. Therefore, in a head IC which outputs the current bias, a voltage applied to the STOAR element is sensed, and it is possible to determine that the STOAR element is oscillating when the voltage is increased to a threshold or more. Conversely, it is possible to determine that the STOAR element is not oscillating when the voltage is less than the threshold. In addition, it is possible to determine that oscillation has diminished, when the resistance decreases after the voltage reaches the threshold or more. Therefore, it is possible to make the STOAR element oscillate normally again, by boosting the STOAR element by a current.12-01-2011
20090262457MICROWAVE ASSISTED MAGNETIC RECORDING SYSTEM - A microwave assisted magnetic recording system includes a write pole that generates a write magnetic field, an element that generates a radio frequency assist magnetic field, and a recording medium that moves relative to the write pole. The recording medium is exposed to the radio frequency assist magnetic field before it is exposed to the write magnetic field. One possible element that generates the radio frequency assist magnetic field is an assist wire placed perpendicular to the write pole. Alternatively, the assist wire can be placed parallel to the write pole so that its radio frequency assist magnetic field couples with the write pole, which in turn generates its own coupled radio frequency magnetic field along with the write magnetic field.10-22-2009
20100142088Spin torque oscillator, magnetic recording head, magnetic head assembly and magnetic recording apparatus - A spin torque oscillator includes an amorphous soft magnetic layer, a nonmagnetic layer and a hard magnetic layer. The nonmagnetic layer with a close-packed crystal structure is provided on the amorphous soft magnetic layer. The hard magnetic layer with a close-packed crystal structure and perpendicular magnetic anisotropy is provided on the nonmagnetic layer.06-10-2010
20080239565SERVO PATTERN RECORDING DEVICE - A servo pattern recording device capable of improving the recording accuracy of a servo pattern. The servo pattern recording device is comprised of a magnetic head that records a servo pattern for tracking servo on a magnetic tape, a first motor that feeds the magnetic tape, a second motor that takes up the magnetic tape, and a main panel along a surface of which the magnetic tape is caused to move. The first motor and the second motor are mounted on the main panel, and the magnetic head is mounted on a first sub panel that is formed separately from the main panel and is connected to the main panel via a connecting member.10-02-2008
20090154010Magnetic disk and magnetic disk unit - Embodiments of the present invention provide a magnetic disk having a lubricating layer formed on the surface thereof, which meets all the requirements for adhesiveness, adequate flowability, and strong binding power. In a particular embodiment, a magnetic disk has a magnetic layer, a protective layer, and a lubricating layer which are formed on a non-magnetic substrate, which is characterized in that said lubricating layer is comprised of a lubricant containing a first ingredient and a second ingredient, said first ingredient as the main constituent being a first perfluoropolyether compound represented by the formula (1) below, which has a weight-average molecular weight of 500 to 6000 and a dispersity smaller than 1.3, and said second ingredient being a second perfluoropolyether compound which has a weight-average molecular weight of 500 to 6000 and has 6 to 10 hydroxyl groups (on average) in one molecule,06-18-2009
20080278851SYSTEMS AND METHODS FOR SELECTIVELY CONTROLLING A STATE OF HYDRATION OF A MAGNETIC DATA STORAGE MEDIUM - A magnetic storage system according to one embodiment includes a magnetic head adapted for at least one of reading from a magnetic medium and writing to the medium; a drive mechanism for directing the medium over the head; and a first element for selectively altering a voltage of the medium for altering a state of hydration of the medium.11-13-2008
20090310254MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCTION APPARATUS USING THE SAME - According to one embodiment, a recording track has a surface modification layer in the surface region. This surface modification layer has an anisotropic magnetic field Hk reduced from that of a region between adjacent recording tracks.12-17-2009
20090310255Magnetic recording medium and magnetic recording and reproducing apparatus - A highly reliable magnetic recording medium is provided which has a recording layer formed in a concavo-convex pattern and wherein the recording layer is unlikely to cause a change in magnetic properties. The magnetic recording medium includes a substrate, a recording layer formed in a predetermined concavo-convex pattern over the substrate, convex portions of the concavo-convex pattern serving as recording elements; and a filler portion filling a concave portion between the recording elements. The filler portion comprises a metal-based main filler material and oxygen. Oxygen is unevenly distributed in the filler portion so that the ratio of the number of oxygen atoms to the total of the number of atoms of the main filler material and the number of oxygen atoms is greater in an upper surface portion of the filler portion than in a lower portion of the filler portion.12-17-2009
20100079911MAGNETIC RECORDING MEDIUM, PROCESS FOR PRODUCING SAME, AND MAGNETIC RECORDING REPRODUCING APPARATUS USING THE MAGNETIC RECORDING MEDIUM - A perpendicular magnetic recording medium is provided, which has a backing layer, a primer layer, an intermediate layer and at least one perpendicular magnetic recording layer, and is characterized in that the perpendicular magnetic recording layer contains Co and Cr, and at least one of the perpendicular magnetic recording layer or layers has a granular structure comprising ferromagnetic crystal grains and grain boundaries comprised of non-magnetic tungsten oxide. The perpendicular magnetic recording layer may be a double-layered structure comprising the tungsten oxide grain boundary-containing layer and a Cr oxide, Si oxide, Ta oxide or Ti oxide grain boundary-containing layer formed on the tungsten oxide grain boundary-containing layer. The perpendicular magnetic recording medium exhibits good perpendicular orientation and has ferromagnetic crystal grains with extremely small grain size, and thus, is superior in high recording density characteristic.04-01-2010
20100079910MAGNETIC DISK APPARATUS AND INFORMATION REPRODUCING METHOD - A magnetic disk apparatus includes a magnetic disk that includes a plurality of zones in which a plurality of tracks are arranged for each of circumferences of a spiral, and gaps that are arranged between the zones to have a width a predetermined number of times larger than a track width and that are regions without providing recording bits; and a reproducing element that simultaneously makes an access to the recording bits contained in the tracks, reading information stored in the recording bits, wherein the number of the tracks is one or larger and a sum of one and the predetermined number or smaller in one of the zones.04-01-2010
20100195246MANUFACTURING METHOD OF MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCING APPARATUS - There is provided a manufacturing method of a magnetic recording medium that maintains a high level of perpendicular orientation of a perpendicular magnetic layer and enables to further increase high recording density, prepared such that at least on a non-magnetic substrate, there are laminated a soft magnetic base layer, an orientation control layer 08-05-2010
20120033331NANOCOMPOSITES FOR ULTRA HIGH DENSITY INFORMATION STORAGE, DEVICES INCLUDING THE SAME, AND METHODS OF MAKING THE SAME - A nanocomposite article that includes a single-crystal or single-crystal-like substrate and heteroepitaxial, phase-separated layer supported by a surface of the substrate and a method of making the same are described. The heteroepitaxial layer can include a continuous, non-magnetic, crystalline, matrix phase, and an ordered, magnetic magnetic phase disposed within the matrix phase. The ordered magnetic phase can include a plurality of self-assembled crystalline nanostructures of a magnetic material. The phase-separated layer and the single crystal substrate can be separated by a buffer layer. An electronic storage device that includes a read-write head and a nanocomposite article with a data storage density of 0.75 Tb/in02-09-2012
20100296192PATTERNED MAGNETIC RECORDING HEAD WITH TERMINATION PATTERN - A thin-film magnetic recording head utilizing a timing based servo pattern is fabricated by sputtering a magnetically permeable thin film onto a substrate. A gap pattern, preferably a timing based pattern, is defined by the thin film. The gap pattern includes termination patterns or endpoints that are elliptical or diamond-shaped.11-25-2010
20100079909METHOD FOR UNLOADING HEAD WITHOUT CALIBRATION IN HARD DISK DRIVES - A hard disk drive with a voice coil motor coupled to a head. The disk drive includes a circuit that provides a drive current with a sinusoidal waveform to the voice coil motor during an unload routine. The back emf of the voice coil motor can be determined during a sample period when the current is essentially zero. There is no need to perform a resistance calibration. This reduces the time needed to unload the head.04-01-2010
20090284868MAGNETIC RECORDING MEDIUM, MAGNETIC STORAGE APPARATUS AND MAGNETIC RECORDING MEDIUM MANUFACTURING METHOD - A magnetic recording medium includes a first upper layer, a first lower layer below the first upper layer, an intermediate layer, provided between the first upper layer and the first lower layer, which magnetically couples the first upper layer and the first lower layer. The first lower layer includes a second upper layer, a second intermediate layer below the second upper layer, and a second lower layer below the second intermediate layer. Coercive force of the first upper layer is higher than coercive force of each of the second upper layer and the second lower layer. The second upper layer and the second lower layer are antiferromagnetically coupled via the second intermediate layer.11-19-2009
20090262456METHOD OF FORMATTING MAGNETIC MEDIA USING A THIN FILM PLANAR ARBITRARY GAP PATTERN MAGNETIC HEAD - Methods of formatting media using planar magnetic heads. A head may comprise a substrate having conductive thru-hole vias extending therethrough, a first magnetic layer deposited and patterned on the substrate, a first insulation layer deposited and patterned on the first magnetic layer, a conductive coil layer deposited and patterned on the first insulation layer and connected to the conductive thru-hole vias, a second insulation layer deposited and patterned on the conductive coil layer, vias patterned into the insulation layer extending to the first magnetic layer, a second magnetic layer deposited in the vias, and a third magnetic layer deposited and patterned on the second insulation layer and second magnetic layer. The third magnetic layer may be connected to the first magnetic layer through the second magnetic layer deposited in the vias of the insulation layers.10-22-2009
20090279205MAGNETIC HEAD AND TAPE DRIVE FOR READING MULTIPLE DATA FORMATS - A magnetic head is provided for reading and writing data on a data storage media. A first writer and a first reader write and read data of a first format. A second reader reads data of a second format having different read channels than the first format. A third reader has a width greater than that of the of the first and second readers, and reads data of a third format wider than that of the first and second formats. A tape drive is disclosed with the magnetic head and control circuitry having read channels for each of the readers. A method for fabricating a magnetic head is disclosed by providing first and second bumps each with a reader and writer of a first format, and a third bump with a reader of a second format and a reader of a third format.11-12-2009
20090284867DEVICE HAVING SIDEGAP AND METHOD FOR FABRICATING SAME - A method in one approach includes forming a first layer of a nonmagnetic material over two sides of a structure, the first layer being substantially absent from above a top of the structure; depositing an overlayer of an etchable, nonmagnetic material over the first layer and the top of the structure; and etching the overlayer for substantially removing the overlayer from above the top of the structure, wherein a substantial portion of the overlayer remains along the two sides of the structure after the etching. Additional systems and methods are also presented.11-19-2009
20090168238INFORMATION STORAGE MEDIUM USING FERROELECTRIC, METHOD OF MANUFACTURING THE SAME, AND INFORMATION STORAGE APPARATUS INCLUDING THE SAME - Provided is an information storage medium using a ferroelectric, including a substrate having an amorphous crystal structure, an electrode layer formed on the substrate, and a ferroelectric layer in a (001) direction formed on the electrode layer.07-02-2009
20090168236Magnetic head for perpendicular recording having stepped wrap around shield with independent control of write pole track width and flare point dimensions - Methods and structures for the fabrication of a thin film, perpendicular recording write head are disclosed. The fabrication involves the deposition of two different oxide layers which have mutually high etch selectivities. This characteristic allows a write pole structure to be built wherein the track width is independent of the location of the flare point. The process also produces a structure wherein the throat height of the shield is self aligned to the location of the flare point of the write pole.07-02-2009
20080212231Magnetic recording medium, magnetic recording and reproducing apparatus, and method for manufacturing magnetic recording medium - The magnetic recording medium includes a substrate and a recording layer formed in a predetermined concavo-convex pattern over the substrate, the recording layer including recording elements each formed as a convex portion of the recording layer. Surface steps are formed in an outer area including a radially outermost portion of a recording area. Each surface step is formed in such a manner that a portion over a concave portion between the recording elements is recessed toward the substrate to a level below a portion over the recording element. The surface steps are formed such that the recording area can be sectioned into an annular area adjoining the outer area and the outer area where height of the surface steps is larger than that in the annular area.09-04-2008
20080212230WAVEGUIDE STRUCTURE, MANUFACTURING METHOD THEREOF AND HAMR USING THE SAME - A manufacturing method of a waveguide structure includes forming a metal layer of a predetermined size on a substrate to form a structure, forming a lower clad layer on the structure in order to completely cover the metal layer, forming a core layer of a predetermined size on the lower clad layer at the location corresponding to the metal layer, and forming an upper clad layer thereon in order to completely cover the core layer.09-04-2008
20100061013Ceramic Sinter, Magnetic Head Substrate Using the Same, Magnetic Head and Recording Medium Drive Unit - Greater emphasis has been placed on smoothness of the floating surface for the applications with floating height of 10 nm or less. To obtain a smooth floating surface, it must be polished with diamond abrasive having a mean particle size of 0.1 μm or less, and conventional ceramic sintered body has poor machinability and it is impossible to use the magnetic heads made of this ceramic sintered body at a floating height of 10 nm or less.03-11-2010
20090168235ENHANCED CPP READ SENSORS WITH LATERAL SPIN TRANSPORT - CPP read sensors and associated methods of fabrication are described that provide lateral spreading of a sense current along the length of an AFM layer of the read sensor. Winged regions (i.e., extended portions) are added to the layers of a CPP sensor stack to induce lateral spreading of the sense current in the AFM layer. Particularly, the pinned layer and the AFM layer have widths greater than the other layers of the sensor stack. Further, the pinned layer comprises multiple layers of materials, with a first layer of material closer to the AFM layer having a lower conductivity and/or a lower spin dependent scattering asymmetry than the second layer of material.07-02-2009
20080310050Magnetic Recording Medium and Production Process Thereof - The present invention provides a magnetic recording medium having superior startup operation and durability as well as satisfactory surface lubricity. The present invention relates to a production process of a magnetic recording medium in which at least a magnetic layer, a protective film layer and a lubricant layer are sequentially laminated on a non-magnetic substrate, wherein the protective film layer is surface treated using a gas activated by plasma generated at a pressure in the vicinity of atmospheric pressure. The present invention also relates to a magnetic recording medium produced according to the aforementioned production process.12-18-2008
20090190254MICROMACHINED MOVER - A micromachined mover includes a rotor substrate and a stator substrate. A suspension is configured to couple the rotor substrate to the stator substrate and allow relative movement therebetween in a plane of the substrates. The suspension is positioned on an interior portion of the substrates.07-30-2009
20090161255PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCTION APPARATUS USING THE SAME - According to one embodiment, a perpendicular magnetic recording medium includes a substrate, soft magnetic underlying layer, nonmagnetic underlying layer, and perpendicular magnetic recording layer. The perpendicular magnetic recording layer has an array of magnetic structures each corresponding to 1 bit of recording information, and includes a crystalline hard magnetic recording layer having perpendicular magnetic anisotropy, and an amorphous soft magnetic recording layer. The hard and soft magnetic recording layers are coupled by exchange coupling.06-25-2009
20100142089PERPENDICULAR MAGNETIC STORAGE MEDIUM AND STORAGE APPARATUS - An underlayer includes concentric soft magnetic bodies extending along the surface of a substrate. The soft magnetic bodies are separated from one another by concentric nonmagnetic bodies and configured to have the axis of easy magnetization set parallel to the surface of the substrate. A magnetic recording film extends along the surface of the underlayer. The magnetic recording film is configured to have the axis of easy magnetization in the perpendicular direction orthogonal to the surface of the substrate. The nonmagnetic bodies are arranged at pitch intervals each equal to or smaller than half a predetermined track pitch. The nonmagnetic bodies serve to restrict the flow of magnetic field in the radial direction in the underlayer. The magnetic field is prevented from acting on the adjacent recording tracks. The inversion of magnetization is reduced in the adjacent recording tracks. Side track erasure is suppressed.06-10-2010
20110205666MAGNETIC SENSOR, MAGNETIC DETECTOR, AND MAGNETIC HEAD - A magnetic sensor comprises a channel, a ferromagnetic body and first and second reference electrodes on the channel, a magnetic shield covering a part of the channel opposing the ferromagnetic body, and an insulating film disposed between the channel and the magnetic shield, while the magnetic shield has a through-hole extending toward the part of the channel opposing the ferromagnetic body.08-25-2011
20110205665COVALENTLY BOUND MONOLAYER FOR A PROTECTIVE CARBON OVERCOAT - A magnetic data storage medium may include a substrate, a magnetic recording layer, a protective carbon overcoat, and a monolayer covalently bound to carbon atoms adjacent a surface of the protective carbon overcoat. According to this aspect of the disclosure, the monolayer comprises at least one of hydrogen, fluorine, nitrogen, oxygen, and a fluoro-organic molecule. In some embodiments, a surface of a read and recording head may also include a monolayer covalently bound to carbon atoms of a protective carbon overcoat.08-25-2011
20080316642MAGNETIC HEAD AND MANUFACTURING METHOD THEREFOR - The present invention relates to a perpendicular recording magnetic head. A main magnetic pole film of a perpendicular recording element is a plated film formed on an electrode film and having a small width portion and a large width portion. The small width portion is a portion for emitting a perpendicular magnetic field from a front end thereof, while the large width portion is portion being continuous with a rear end of the small width portion and having an increased width. The electrode film is different in film thickness between beneath a portion of the plated film forming at least the front end of the small width portion and beneath a portion of the plated film forming the large width portion.12-25-2008
20080316644PMR with improved writability and process controllability by double layer patterning - Improved writability and a sharper neck transition are achieved in a PMR writer with a yoke that has essentially vertical sidewalls and a write pole that has sidewalls with a beveled angle. An alumina mold is made with a negative differential bevel angle by employing a two mask process. A first photoresist layer is patterned and etched to form a rectangular trench in an alumina layer. The trench extends beyond the intended ABS plane and in the opposite direction into the intended yoke area. A second photoresist layer is patterned into a yoke shape that is partially superimposed over the rectangular trench. After a second RIE process, the yoke opening adjoins the trench at a neck transition point along each long trench side. The volume of magnetic material in the yoke adjacent to the neck is thereby maximized. Dimension control of the main pole becomes independent of ABS positioning errors.12-25-2008
20090086369MAGNETIC RECORDING MEDIUM, MAGNETIC SIGNAL REPRODUCTION METHOD AND MAGNETIC SIGNAL REPRODUCTION SYSTEM - An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic powder and a binder on one surface of a nonmagnetic support and a backcoat layer on the other surface of the nonmagnetic support, wherein a number of indentations equal to or greater than 20 nm in depth present on the magnetic layer surface is equal to or less than 100/10,000 μm04-02-2009
20090086368MAGNETIC RECORDING MEDIUM, MAGNETIC SIGNAL REPRODUCTION METHOD AND MAGNETIC SIGNAL REPRODUCTION SYSTEM - The present invention relates to a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic powder and a binder on one surface of a nonmagnetic support and a backcoat layer comprising a granular material and a binder on the other surface of the nonmagnetic support, wherein the backcoat layer has an average surface roughness ranging from 15 to 25 nm, as measured by an atomic force microscope, and a density of protrusions equal to or greater than 50 nm in height ranges from 1 to 50/mm04-02-2009
20090201607Patterned perpendicular magnetic recording medium and magnetic recording and reproducing apparatus - It is made possible to provide a patterned perpendicular magnetic recording medium that has smaller write magnetic field and the variation of magnetic characteristics in the bit regions, generates fewer reversed magnetic domains in the position control information regions of the head, and has excellent thermal stability. A patterned perpendicular magnetic recording medium includes: a nonmagnetic substrate; a soft magnetic base layer formed on the nonmagnetic substrate; a nonmagnetic intermediate layer formed on the soft magnetic base layer; and a perpendicular magnetic recording layer formed on the nonmagnetic intermediate layer, and including a stacked structure of a CoPt-based crystalline film having a Pt content in the range of 5 atomic percent to 35 atomic percent and a rare-earth and transition metal alloy amorphous film formed on the CoPt-based crystalline film. The CoPt-based crystalline film and the rare-earth and transition metal alloy amorphous film are exchange-coupled.08-13-2009
20090103208MAGNETIC HEAD - According to an aspect of an embodiment, a magnetic head includes: a write element including a first magnetic pole and a second magnetic pole magnetically connected to the first magnetic pole; and a nonmagnetic insulating layer made of inorganic material surrounding the write element. The magnetic head further includes: upper and lower low-thermal-expansion material layers disposed on and under the nonmagnetic insulating layer, respectively, the low-thermal-expansion material layers having a thermal coefficient lower than that of the nonmagnetic insulating layer; and a heater element embedded in the nonmagnetic insulating layer.04-23-2009
20090231755MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - The invention provides a magnetic recording medium, and a magnetic recording and reproducing apparatus. The magnetic recording medium includes a substrate 09-17-2009
20090213492METHOD OF IMPROVING STABILITY OF DOMAIN POLARIZATION IN FERROELECTRIC THIN FILMS - A memory device comprises a ferroelectric media comprising at least one ferroelectric film. The ferroelectric film has an as-grown spontaneous polarization of a first direction. A tip is position over the ferroelectric film and a first voltage is applied to the tip larger than a switching voltage of the ferroelectric film. One or both of the tip and the ferroelectric media is moved to form a first domain having a spontaneous polarization of opposite the first direction. The tip is then positioned over the first domain and a second voltage to the tip smaller than the first voltage to form a second domain smaller than the first domain and having a polarization of the first direction, the second domain defining the bit.08-27-2009
20090213494Perpendicular Magnetic recording system and medium with high-moment corrosion-resistant "soft" underlayer (SUL) - A perpendicular magnetic recording disk has a soft magnetic underlayer (SUL) that has high corrosion resistance as well as high moment. The material of the SUL is an alloy comprising Co, Fe, X, and Y; where X is Ta or Nb, Y is Zr or Hf, and the combined amount of X and Y present in the alloy is between about 10 and 20 atomic percent. The atomic ratio of Co to Fe in the alloy is between about 90:10 to 10:90, preferably between about 25:75 and 35:65. The SUL may be a single-layer SUL or a multilayer SUL formed of multiple soft magnetic layers separated by an interlayer film or films.08-27-2009
20090002883Wire-assisted magnetic write device with phase shifted current - A magnetic device includes a write element having a write element tip and a conductive coil for carrying a current to induce a first field from the write element. A conductor proximate the write element tip carries the current to generate a second field that augments the first field. A driver provides the current to the conductive coil and the conductor, and a circuit phase shifts the current through the conductor relative to the current through the conductive coil.01-01-2009
20090244770MANUFACTURING METHOD OF MAGNETIC RECORDING MEDIUM, THE MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING APPARATUS - Aspects of the present embodiments are related to manufacturing methods of magnetic recording media. The manufacturing method of a magnetic recording medium includes a step of stacking a soft magnetic backing layer, an intermediate layer, a first recording layer having a perpendicular magnetic anisotropy, an exchange coupling force control layer including ruthenium, and a second recording layer having a perpendicular magnetic anisotropy on a substrate in order. A gas pressure of a process gas when the exchange coupling force control layer is being formed is higher than the gas pressure of the process gas when being normally used.10-01-2009
20090213495USE OF GRATING STRUCTURES TO CONTROL ASYMMETRY IN A MAGNETIC SENSOR - The present invention provides apparatus and method for controlling the asymmetrical properties of the response of a magnetic sensor element to a magnetic field produced by the digital data in a magnetic storage device. The present invention also provides an apparatus and method for controlling the bias point of a magnetic field produced by a magnetic sensor element.08-27-2009
20090213493APPARATUS, SYSTEM, AND METHOD FOR TAPE DRIVE HEAD - An apparatus, system, and method are disclosed for a tape drive head. An upper servo element reads an upper servo track conforming to a specified format. A lower servo element reads a lower servo track conforming to the specified format. A mid servo element reads a mid servo track. The mid servo element is disposed between the upper servo element and the lower servo element. Sixteen legacy read elements are disposed between the upper server element and the lower servo element. The legacy read elements read legacy data tracks conforming to the specified format. At least eight incremental read elements are interleaved between the legacy read elements. One incremental read element is adjacent to each legacy read element on a side of the legacy read element away from the mid servo element.08-27-2009
20090244771MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING DEVICE - A disclosed magnetic recording medium includes a substrate; a soft magnetic backing layer disposed on the substrate; an intermediate layer disposed on the soft magnetic backing layer; a first recording layer disposed on the intermediate layer and having perpendicular magnetic anisotropy; an exchange-coupling-energy control layer disposed on the first recording layer and made of a granular material in which oxide is added to metal including ruthenium; and a second recording layer disposed on the exchange-coupling-energy control layer, having perpendicular magnetic anisotropy, and ferromagnetically coupled with the first recording layer via the exchange-coupling-energy control layer.10-01-2009
20090251821DEDICATED ID-OD WRITER WITH BEVELED POLE TIPS AND METHOD OF MANUFACTURE - A transducing head for use with a storage medium rotatable about an axis includes first and second writers for writing to the storage medium. The first writer is configured for dedicated writing to a first radial region of the storage medium, and the second writer is configured for dedicated writing to a second radial region of the storage medium. The second radial region is located radially outward from the first radial region.10-08-2009
20090296274PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE APPARATUS - A perpendicular magnetic recording medium includes a nonmagnetic seed layer, a nonmagnetic intermediate layer provided on the nonmagnetic seed layer, and a perpendicular recording layer provided on the nonmagnetic intermediate layer. The nonmagnetic seed layer includes a first seed layer made of a Ni alloy having a fcc structure, and a second seed layer provided between the first seed layer and the nonmagnetic intermediate layer and made of a Ni alloy having a fcc structure. A content of one or more elements other than Ni within the Ni alloy forming the second seed layer and having a Goldschmidt radius greater than that of Ni is larger than a content of one or more elements other than Ni within the Ni alloy forming the first seed layer and having a Goldschmidt radius greater than that of Ni.12-03-2009
20100188773Multiferroic Storage Medium - A data storage medium that includes a multiferroic thin film and ferromagnetic storage domains formed in the multiferroic thin film. The multiferroic thin film may be formed of at least one of BiFeO07-29-2010
20100128390METHOD FOR FORMING MAGNETIC LAYER, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - The invention provides a method of forming a magnetic layer with stable magnetic properties and stable recording-and-reproducing properties, by uniformizing the distribution of oxygen radical concentration upon reactive sputtering, and thereby uniformizing the concentration of oxygen to be taken into the magnetic layer along the plane direction. That is, the invention relates to a method of forming a magnetic layer by reactive sputtering, which comprises: placing a substrate in a reaction container; arranging a pair of electrode units comprising sputtering electrodes and targets which are disposed on surfaces of the sputtering electrodes and which contain chromium other than the oxide thereof, so that the electrode units respectively face both sides of the substrate while the targets are on the substrate sides; feeding an argon-water mixture gas to vicinities of the respective surfaces on the substrate sides of the pair of electrode units; and applying reactive sputtering so that the chromium other than the oxide thereof contained in the targets can be made into chromium oxide as a constituent to form the magnetic layer having the granular structure.05-27-2010
20080316643Magnetic write device with a cladded write assist element - A magnetic device includes a write element having a write element tip and a conductor adjacent an edge of the write element tip for carrying current to generate an assist field that augments a write field generated by the write element. A cladding material is disposed on at least one surface of the conductor.12-25-2008
20110235211MAGNETIC RECORDING MEDIUM, MANUFACTURING METHOD THEREOF, AND MAGNETIC RECORDING/REPRODUCING DEVICE - A magnetic recording medium that is capable of realizing both high magnetic permeability and antiferromagnetic coupling for a soft magnetic underlayer. Namely, a magnetic recording medium including at least a non-magnetic substrate on which is laminated a soft magnetic underlayer formed by antiferromagnetic coupling of a plurality of soft magnetic layers, and a perpendicular magnetic layer for which the axis of easy magnetization is oriented mainly perpendicularly to the non-magnetic substrate, wherein the soft magnetic layers contain Fe as a first main component, Co as a second main component, and also contain Ta, the soft magnetic underlayer is antiferromagnetically coupled using the second peak or a subsequently appearing peak of the antiferromagnetic coupling force, which changes according to the thickness of a spacer layer sandwiched between the plurality of soft magnetic layers, and the magnetic permeability of the soft magnetic underlayer is not less than 1,000 H/m.09-29-2011
20100302679Patterned media and method of manufacturing the same, and magnetic recording apparatus - A patterned media has a substrate, and a magnetic recording layer on the substrate including protruded magnetic patterns and a nonmagnetic material filled in between the protruded magnetic patterns. In the patterned media, a depth D12-02-2010
20110019307METHOD FOR PRODUCING MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCING APPARATUS - A method for producing a magnetic recording medium comprising at least a recording layer and a protective film provided on top of a non-magnetic substrate, the method comprising, in the following order, forming a continuous recording layer on the substrate, forming a patterned resist layer, partially removing the recording layer based on a resist pattern, applying an organosilicon compound having an active energy beam-curable functional group onto the recording layer and regions from which the recording layer has been removed, curing the organosilicon compound with an active energy beam, etching the organosilicon compound to expose a magnetic layer, and forming a protective film.01-27-2011
20110019305MAGNETIC STORAGE DEVICE - A magnetic storage device comprises a magnetic recording medium; a writing/reading element for storing information on the magnetic recording medium by generating a write field in order to switch regions within the magnetic recording medium in accordance with the information to be stored and reading stored information from the magnetic recording medium by sensing the switched regions within the recording medium and a layer-addressing means for addressing different layers of the magnetic recording medium by applying an oscillating magnetic layer address field in addition to the write field and by controlling the frequency of the oscillating magnetic field so that regions in different layers of the magnetic recording medium can be selectively switched and read.01-27-2011
20090168237Perpendicular magnetic recording writer main pole having imbedded non-magnetic core and de-coupled pole tip - Methods and structures for the fabrication of a thin film, perpendicular recording write head are disclosed. The structure provides a pole tip separated from a rear pole by a non-magnetic separation layer located adjacent the flare point. The rear pole contains an imbedded non-magnetic layer. The separated pole tip and imbedded layer aid in the high data rate recording as well as the erasure performance of the write pole structure. The fabrication involves the deposition of two different oxide layers which have mutually high etch selectivities. This characteristic allows a write pole structure to be built wherein the track width is independent of the location of the flare point. The process also produces a structure wherein the placement of the throat height of the shield is self aligned to the flare point of the write pole.07-02-2009
20090034119Perpendicular Magnetic Recording Medium, and Perpendicular Magnetic Recording and Reproducing Apparatus - The invention provides a perpendicular recording medium with high recording density, and a magnetic recording and reproducing apparatus, by improving the function of magnetic anisotropy of a soft magnetic underlayer. The perpendicular recording medium has at least a soft magnetic underlayer and a perpendicular magnetic recording layer on a non-magnetic substrate, wherein when Ku⊥ (erg/cm02-05-2009
20110242702MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/REPRODUCTION APPARATUS - According to one embodiment, a perpendicular magnetic recording layer comprises a granular film type recording layer and a continuous film type recording layer. The granular film type recording layer comprises a first granular film type recording layer in which magnetic crystal grains in a film plane has an average crystal grain diameter of 3 to 7 nm, and a second granular film type recording layer including magnetic crystal grains having an in plane average crystal grain diameter larger than that of the magnetic crystal grains of the first granular film type recording layer.10-06-2011
20090015966MAGNETIC DISK APPARATUS - There is disclosed a magnetic disk apparatus including a magnetic disk and a magnetic head for recording data onto the magnetic disk or reading data from the magnetic disk. The magnetic disk includes a retracting part for loading the magnetic head on a surface of the magnetic disk or unloading the magnetic head from the surface of the magnetic disk. The magnetic head includes a protruding part provided at a tip part thereof. The retracting part includes an engaging part extending above the magnetic disk and having a slope part, and a driving part configured to move the engaging part in a direction orthogonal to the surface of the magnetic disk in a state where the protruding part contacts the slope part when unloading the magnetic head from the surface of the magnetic disk.01-15-2009
20090015965PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD FOR MANUFACTURING THE SAME - A perpendicular magnetic recording head includes a main pole, a return yoke forming a magnetic path with the main pole, and a coil encompassing the main pole in a solenoid structure to allow the main pole to generate a magnetic field that records information on a recording medium is provided. When a side of the main pole toward the return yoke is an upper portion of the main pole and a side of the main pole opposite to the return yoke is a lower portion of the main pole, the coil includes a lower wire portion passing through the lower portion of the main pole, an upper wire portion passing through the upper portion of the main pole, and a connection portion electrically connecting the lower wire portion and the upper wire portion, and the upper wire portion includes an upper wire layer having at least two layers. The structure may improve a high frequency recording characteristics required for achieving a high recording density.01-15-2009
20100053810MAGNETIC HEAD - A system in one embodiment includes first and second modules, each module having a substrate, a closure, and a gap situated therebetween, the gap comprising transducers selected from readers and writers; wherein the closures face each other, wherein the closure and the substrate of each module form a flat tape bearing surface, wherein a module spacing is defined as a distance from a point proximate to the transducers in the gap of the first module to a point proximate to the transducers in the gap of the second module, wherein the module spacing is less than 1.3 mm and greater than 0 mm.03-04-2010
20100053811MAGNETIC STORAGE APPARATUS AND MAGNETIC STORAGE MEDIUM - A magnetic storage apparatus includes a magnetic storage medium including a recording layer, and a backing layer including a portion having a Curie temperature lower than that of the recording layer, a recording head that generates a magnetic field for recording from a side of the recording layer opposite to another side on which the backing layer is provided, and a heater unit heating at least a part of an area in proximity to a target area for recording by the recording head.03-04-2010
20110249363MAGNETIC HEAD INCLUDING SENSOR - A magnetic head disposed in a slider, that is arranged at an interval from a magnetic disk includes a sensor disposed in a position that is opposed to the magnetic disk, a heat conductive film that is positioned on an air bearing surface opposed to the magnetic disk, and that is formed so as to overlap the sensor, of which a height in a direction perpendicular to the air bearing surface is more than a height of the sensor, and that transfers a temperature change of the air bearing surface to the sensor, and a pair of lead films electrically connected to the sensor and not electrically connected to the heat conductive film.10-13-2011
20100053809EMBEDDED SERVO ON TRACK FOR BIT-PATTERNED MEDIA (BPM) - A method of making a disc for a computer disc drive and a disc made in accordance with the same. The disc includes a deposited magnetic layer of a thin film medium over a disc-shaped substrate. A master pattern having a plurality of tracks is recorded on the disc. Each track on the disc includes a plurality of magnetic islands, each having a size and magnetic properties. The size and/or magnetic properties of one or more of the magnetic islands of each track are modulated such that each track has a modulation frequency, so as to imprint a magnetic topology on the disc. The modulation frequency of each track is either a fundamental frequency or an overtone of the fundamental frequency.03-04-2010
20100053808NANOMETER SCALE MAGNETIZATION - Magnetic heads for perpendicular magnetic recording on magnetic recording media are provided.03-04-2010
20120147498HEAD IC AND MAGNETIC DISK APPARATUS HAVING MICROWAVE ASSISTANCE FUNCTION - According to one embodiment, it is determined whether a STOAR element which performs microwave assistance for a magnetic disk apparatus is made to oscillate properly. When the STOAR element is oscillating when a current bias is applied, the resistance of the element increases. Therefore, in a head IC which outputs the current bias, a voltage applied to the STOAR element is sensed, and it is possible to determine that the STOAR element is oscillating when the voltage is increased to a threshold or more. Conversely, it is possible to determine that the STOAR element is not oscillating when the voltage is less than the threshold. In addition, it is possible to determine that oscillation has diminished, when the resistance decreases after the voltage reaches the threshold or more. Therefore, it is possible to make the STOAR element oscillate normally again, by boosting the STOAR element by a current.06-14-2012
20120147497MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING APPARATUS - According to one embodiment, a magnetic recording medium includes: a data region including a plurality of first magnetic dots disposed at specific positions for recording data; and a servo region including a plurality of second magnetic dots disposed at specific positions for identifying the position of the first magnetic dots, wherein an address pattern in the servo region is subdivided in the radial direction.06-14-2012
20110019308PERPENDICULAR MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING PERPENDICULAR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - Disclosed is a perpendicular magnetic recording medium including: a nonmagnetic substrate; and a recording layer formed on the nonmagnetic substrate, the recording layer having magnetic anisotropy in a direction perpendicular to a surface of the nonmagnetic substrate and including a plurality of recording portions and a plurality of separation regions for isolating the neighboring recording portions, wherein the separation regions are formed of a material having a granular structure.01-27-2011
20110038078INTEGRATED RECORDING HEAD WITH SELECTIVE MOVEMENT - A recording head for use in magnetic storage devices is disclosed. The recording head includes a transducer that is bi-directionally movable with respect to a surface of the magnetic storage medium, thereby enabling improved positioning of the transducer during recording head read and write operations. Various structures are disclosed to bi-directionally actuate the recording head transducer. In one embodiment, an interleaver assembly having a plurality of flexure assemblies employs a motor including magnetic portions for selective, bi-directional actuation. In another embodiment, electrostatic charges are employed in the flexure assemblies for selective actuation. In yet another embodiment, piezoelectric elements are included to provide for selective actuation.02-17-2011
20110019306MAGNETIC DISK APPARATUS - According to one embodiment, there is provided a magnetic disk apparatus having a magnetic disk having magnetic dot lines each including magnetic dots arrayed at equal intervals in a down track direction, and a read/write head which uses a plurality of adjacent magnetic dot lines as one track and sequentially performs read and write on the magnetic dots included in the magnetic dot lines constituting the track, in which the magnetic dots included in each of the magnetic dot lines in each track of the magnetic disk are displaced in the down track direction from the magnetic dots included in the adjacent dot line in the track depending on a possible skew angle between the read/write head and the track so that the magnetic dots are sequentially accessed by the read/write head.01-27-2011
20080253020Read/Write Tip, Head and Device, and Use Thereof, and Method for Manufacturing Same - The invention concerns a reading/writing tip configured in the shape of a needle consisting of a core of refractory material covered with a coating of electrically conductive material, and having an outer microscope needle geometry by tunnel effect, to obtain an information concerning a surface through tunnel-effect microscopy The needle emits a charged particle from the layer of electrically conductive material, to form the surface. The tip comprises a reservoir capable of being liquefied to flow along the tip.10-16-2008
20100265616MAGNETIC RECORDING HEAD AND MAGNETIC STORAGE DEVICE - According to one embodiment, a magnetic recording head includes a flying surface and an exposed surface exposed on the flying surface. The exposed surface is defined by oblique sides and a lower side of a trapezoid having an upper side on the trailing side, and a contour line. The lower side on the leading side extends in parallel to the upper side and is shorter than the upper side. The contour line extends from one end to the other end of the upper side and rises from the upper side towards the trailing side between extended lines of the oblique sides.10-21-2010
20100039729PACKAGE WITH INTEGRATED MAGNETS FOR ELECTROMAGNETICALLY-ACTUATED PROBE-STORAGE DEVICE - A packaged memory device for storing information comprises a stack, a package lid, a first magnet structure fixedly connected to the package lid, a package body and a second magnet structure connected with the package body. The stack includes a tip substrate, a cap, and a media arranged between the tip substrate and cap and movable relative to the tip substrate. The tip substrate includes a plurality of tips extending from the tip substrate so that the tips can access the media. The first magnet structure includes a first magnet connected with a first flux plate. The second magnet structure includes a second magnet connected with a second flux plate. The second flux plate is integrated with the package body so that the second flux plate provides structural rigidity to the package body. The stack is connected to one or both of the package body and the second magnet.02-18-2010
20100039730MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - The present invention provides a magnetic recording medium which is capable of improving the perpendicular orientation of a perpendicular magnetic recording layer while maintaining a writing performance during recording and obtaining both an improvement in the perpendicular orientation and fine magnetic crystal particles with a uniform diameter, and which enables information to be recorded or reproduced at high density, a method of manufacturing the same, and a magnetic recording/reproducing apparatus. A magnetic recording medium 02-18-2010
20100033871BI-DIRECTIONAL MAGNETIC RECORDING HEAD BUILT ON A COMMON SUBSTRATE - The aspects of the present invention provide a magnetic recording head, a method for manufacturing a magnetic recording head, and a magnetic recording head drive. The magnetic recording head includes a substrate and a first magnetic device connected to the substrate. The magnetic recording head also includes a second magnetic device connected to the first magnetic device. The first magnetic device is aligned with the second magnetic device. The first and second magnetic devices are supported by the same side of the substrate.02-11-2010
20080247085FERROELECTRIC HARD DISK SYSTEM - A ferroelectric hard disk device is provided and includes: a ferroelectric media having a bottom electrode and a ferroelectric layer disposed on the bottom electrode; and a head formed above the ferroelectric media, the head being operative to write and reproduce information on the ferroelectric layer.10-09-2008
20120200958MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - A perpendicular magnetic recording medium of the present invention comprises a non-magnetic substrate, and at least a backing layer, an under layer, an intermediate layer and a perpendicular magnetic recording layer, which are sequentially laminated on the non-magnetic substrate, wherein the backing layer is formed of a soft magnetic film having an amorphous structure, the under layer contains a NiW alloy containing any one or both of Co and Fe, the W content of the NiW alloy is within a range from 3 to 10 atom %, the total of the Co and Fe contents of the NiW alloy is 5 atom % or more and less than 40 atom %, the saturation magnetic flux density Bs of the NiW alloy is 280 emu/cm08-09-2012
20090021860Production method for magnetic recording medium - A production method for a magnetic recording medium including forming thin films on a substrate using a sputtering method with a target, wherein the target on which an annular-shaped erosion area is formed during sputtering and a substrate holder on which a plurality of substrates are mounted are installed, opposed in parallel, in a manner such that center axes of the target and the substrate holder align with each other, and the substrates are mounted on the substrate holder in positions such that R01-22-2009
20100321823BEARING APPARATUS, SPINDLE MOTOR, AND DISK DRIVE APPARATUS - A bearing apparatus includes a shaft, a thrust cup including an annular potion and a cylindrical portion, a rotating member including a through hole defined therein, and a lubricating oil. A second gap defined between a lower surface of the rotating member and an upper surface of the annular portion of the thrust cup includes a first region in communication with a capillary seal portion, and a second region positioned radially inward of the first region and having an axial dimension smaller than that of the first region. A lower end portion of the through hole is open at a location radially outwardly away from a boundary between the first and second regions, so that a local circulation of the lubricating oil arises within the first region during rotation of the rotating member.12-23-2010
20100321822MANUFACTURING METHOD OF THIN-FILM MAGNETIC HEAD, WAFER FOR THIN-FILM MAGNETIC HEAD AND THIN-FILM MAGNETIC HEAD - A manufacturing method of a thin-film magnetic head, includes a step of forming many thin-film magnetic heads arranged along row and column directions on a wafer, each of the thin-film magnetic heads having a read head element, a write head element, and pairs of probe-use pads electrically connected with the read head element and the write head element, respectively, the pairs of probe-use pads being positioned so that at least part of each probe-use pad is removed by a cutting process along the row direction, a step of obtaining a plurality of row-bars by cutting the wafer along the row direction so that the at least part of each probe-use pad is removed, each of the obtained row-bars having the thin-film magnetic heads aligned in the row direction, a step of forming pairs of bonding pads electrically connected with the read head element and the write head element, respectively, on a surface opposite to an ABS of each thin-film magnetic head of each of the row-bars, and a step of cutting each row-bar along the column direction to separate into individual thin-film magnetic heads.12-23-2010
20110164335MAGNETIC SENSOR INCLUDING A FREE LAYER HAVING PERPENDICULAR TO THE PLANE ANISOTROPY - A magnetic sensor includes a reference layer having a first magnetization direction and a free layer assembly having an effective magnetization direction substantially perpendicular to the first magnetization direction and substantially perpendicular to a plane of each layer of the free layer assembly. A spacer layer is between the reference layer and the free layer, and a signal enhancement layer is exchange coupled to the free layer assembly on a side opposite the spacer layer.07-07-2011
20110043947MAGNETIC RECORDING/REPRODUCTION DEVICE - There is provided a magnetic recording/reproduction device which can appropriately supply lubricant to a metal-thin-film magnetic tape (02-24-2011
20100214691Magnetic Absolute Position Sensor - A magnetic absolute position sensor comprises: a read head, a horizontal magnetic scale, and an oblique magnetic scale. The read head is provided with a first position sensing unit and a second position sensing unit which are used produce signal with respect to the horizontal magnetic scale and the oblique magnetic scale, respectively. The distance between the first position sensing unit and the horizontal magnetic scale is constant, and the distance between the second position sensing unit and the oblique magnetic scale changes from narrow to wide. The absolute position identifying system is electrical connected to the first and second position sensing units, respectively, to obtain absolute position coordinates.08-26-2010
20090316300PRINTED CIRCUIT BOARD AND METHOD OF MANUFACTURING THE SAME - A first insulating layer is formed on a suspension body. Wiring traces are formed in parallel at an interval on the first insulating layer. A second insulating layer is formed in a region on the first insulating layer on both sides of the wiring traces. A wiring trace is formed in a region on the second insulating layer on the side of the wiring trace. A wiring trace is formed in a region on the second insulating layer on the side of the wiring trace. A third insulating layer is formed on the first and second insulating layers to cover the wiring traces.12-24-2009
20110149437METHOD AND APPARATUS FOR READ AND WRITE DATA IN A DISK DRIVE WITH DISCRETE TRACK DISK - According to one embodiment, a disk drive includes a disk and a data read/write module. The disk has a disk substrate, tracks and non-recording areas. The tracks and the non-recording areas are formed on the disk substrate and arranged in the radial direction of the disk. The tracks are magnetic layers and have a recording area each. The non-recording areas are made of non-magnetic layers and arranged between the tracks. Thus, valid recording area and invalid recording areas are provided in each track, at a predetermined ratio. The data read/write module is configured to write data in or read data from the valid recording areas, but not in or from the invalid recording areas.06-23-2011
20100027161MAGNETIC RECORDING APPARATUS - A magnetic recording apparatus includes a magnetic recording head having a magnetic pole and a spin torque oscillator, the spin torque oscillator being placed adjacent to the magnetic pole and includes at least two magnetic layers of a first magnetic layer and a second magnetic layer, and a magnetic recording medium includes two magnetic layers of a recording layer and an antenna layer, the recording layer including a hard magnetic material, such that the antenna layer is formed closer to the magnetic recording head than the recording layer, in which the antenna layer has a resonance frequency fa lower than a resonance frequency fr of the recording layer, greater than a resonance frequency of the second magnetic layer, and the recording layer and the antenna layer are ferromagnetically coupled to each other.02-04-2010
20090161254MAGNETIC RECORDING MEDIUM, PRODUCTION METHOD THEREOF AND MAGNETIC DISC APPARATUS - A magnetic recording medium for use in digital magnetic recording, which comprises a nonmagnetic substrate having deposited thereon a magnetic layer, wherein with respect to the in-plane direction, the magnetic recording layer comprises a plurality of ferromagnetic regions separated from each other by an antiferromagnetic region. A production method of the magnetic recording medium and a magnetic disc apparatus are also disclosed.06-25-2009
20110116189MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCING DEVICE - The present invention relates to a perpendicular magnetic recording medium including at least a backing layer, an orientation control layer, a magnetic recording layer and a protective layer provided on top of a non-magnetic substrate, wherein the orientation control layer is composed of two or more layers including a seed layer and an intermediate layer, formed in that order from the substrate side, and the seed layer is formed of a material containing 5 to 25 atomic % of an element for which, in a phase diagram, the solid solution region with an element having a face-centered cubic structure is not more than 1 atomic %. Also provided is a magnetic recording/reproducing device that includes the magnetic recording medium and a magnetic head for recording and reproducing information on the magnetic recording medium.05-19-2011
20120307403MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING APPARATUS - According to one embodiment, a magnetic recording medium includes: a data area on which a plurality of first magnetic dots are arranged at predetermined positions to record information; a servo area on which a plurality of second magnetic dots for specifying the positions of said plurality of first magnetic dots are arranged at predetermined positions; and servo frames configured so that a frequency of said servo frames is 2 N per circumference of said medium having a radius, that said servo frames are radially discontinuous, and that said servo frame and a space-area, on which no servo frames exist, are alternately radially arranged at a cycle W.12-06-2012
20100067144Magnetic recording medium, magnetic recording and reproducing apparatus, and method for manufacturing magnetic recording medium - The magnetic recording medium includes: a substrate; a recording layer formed in a predetermined concavo-convex pattern over the substrate, the recording layer including recording elements formed as convex portions of the concavo-convex pattern; a filling material disposed in a concave portion between the recording elements; and a lubricant disposed over the recording element and the filling material. The filling material and the lubricant are fluorine-based organic compounds, and the mass average molecular weight of the filling material is greater than the mass average molecular weight of the lubricant.03-18-2010
20120099222METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING DEVICE - A method of manufacturing a magnetic recording medium having a magnetically separated magnetic recording pattern is provided, in which the surface of a magnetic layer is not oxidized or halogenated, the surface is not contaminated with dust, and the manufacturing process is not complex. The method of manufacturing a magnetic recording medium having a magnetically separated magnetic recording pattern includes forming a magnetic layer on a nonmagnetic substrate, forming a mask layer made of carbon to form the magnetic recording pattern on the magnetic layer, forming cobalt carbide as a nonmagnetic material in the magnetic layer by irradiating a region of the magnetic layer not covered by the mask layer with ion beams including carbon hydride ions, and removing the mask layer in this order.04-26-2012
20110304939Magnetic recording device, magnetic recording method and magnetic recording medium for shingle write scheme - This magnetic recording device is provided with a magnetic write head having a magnetic pole, and a magnetic recording medium having a plurality of data recording blocks. Each of the data recording blocks is formed with a plurality of write tracks and separated, in a write track width direction, from neighboring one of the data recording blocks with a writing exudation suppression section in between. With this configuration, a magnetic mutual interference of the adjacent data recording blocks at the time of a data rewriting process is avoided even when a mutual interval of the data recording blocks is narrowed, and a good recording state is maintained in each of the data recording blocks. Therefore, it is possible to achieve an improvement in a recording density, while realizing the good and brief data rewriting process for each of the data recording blocks.12-15-2011
20110109992METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - The present invention relates to a method for manufacturing a magnetic recording medium having magnetically separated magnetic recording patterns, such a magnetic recording medium, and a magnetic recording and reproducing apparatus.05-12-2011
20100226041MAGNETIC RECORDING MEDIUM, METHOD OF FABRICATING THE SAME, AND STORAGE APPARATUS - A magnetic recording medium includes a recording layer having a granular structure in which magnetic particles are dispersed within a non-magnetic base, and a non-magnetic material embedded in grooves of patterns formed on the recording layer. The magnetic particles have an inverted truncated cone shape with a diameter larger in an upper region of the recording layer than in a lower region of the recording layer.09-09-2010
20120044596METHOD OF PRODUCING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - There is provided a method of producing a magnetic recording medium having a magnetically separated magnetic recording pattern formed therein, without oxidizing or halogenating a surface of a magnetic layer, and also without contaminating the surface with dust and without complicating a production process,02-23-2012
20110063753MULTI-LAYER SHEET PRODUCT - A magnetically-activatable sheet product is provided comprising a pair of laminated outer sheets at least one of which is provided with a pigment/binder primer coat on its inward facing surface, between which is a magnetic layer comprising magnetically-activatable particles in a binder matrix, the outer sheets having sufficient opacity to mask the appearance of the magnetic layer.03-17-2011
20120002325MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS - According to one embodiment, a magnetic recording head includes a main magnetic pole generating a recording magnetic field in a magnetic recording medium, a return yoke paired with the main magnetic pole, and a spin torque oscillator interposed between the main magnetic pole and the return yoke and including a spin injection layer, an oscillation layer, a nonmagnetic metal layer, and spin assist layer stacked in this order, wherein the nonmagnetic metal layer includes at least one metal selected from the group consisting of Cu, Au, Ag, Al, Pd, Pt, Os, and Ir, and the spin assist layer is a soft magnetic layer whose saturation magnetic flux density (Bs), diamagnetic field coefficient (N) and gap magnetic field (Hg) show a relationship expressed by Bs×N>Hg.01-05-2012
20120044597MAGNETIC RECORDING MEDIUM, INFORMATION STORAGE DEVICE, AND METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - A magnetic recording medium includes a magnetic recording layer. The magnetic recording layer includes a first magnetic layer formed as a pattern portion that is a data portion in a servo region, a second magnetic layer formed as a non-pattern portion that is magnetized to be antiparallel with a magnetization direction of the first magnetic layer and of which coercive force is lower than a coercive force of the first magnetic layer, and a nonmagnetic layer formed between the first magnetic layer and the second magnetic layer.02-23-2012
20120026625LAMINATED CONTACT PAD - A contact pad includes a first layer of material with a first yield strength and a second layer of material with a second yield strength is laminated to the first layer. A third yield strength of the laminated composite of the first layer and the second layer exceeds the first yield strength and the second yield strength due to the Hall-Petch phenomenon. An overcoat covers an edge of the first layer and the second layer of the contact pad to prevent wear. A method of creating the contact pad or other microelectronic structure includes depositing a first layer of material with a first yield strength on a substrate. A second layer of material with a second yield strength is deposited on the first layer. An edge of the first layer and the second layer is coated with an overcoat material to prevent wear of the first and second layers.02-02-2012
20110085264PATTERNED PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH DATA ISLANDS HAVING A FLUX CHANNELING LAYER BELOW THE RECORDING LAYER - A patterned perpendicular magnetic recording medium, such as a disk for use in hard disk drives, has a flux channeling layer (FCL) located below the recording layer (RL) in each of the discrete data islands. The disk includes a substrate, a soft underlayer (SUL) of soft magnetically permeable material on the substrate, and a nonmagnetic exchange break layer (EBL) on the SUL. A nonmagnetic separation layer (SL) is located between the FCL and the RL in the islands. The FCL has an anisotropy field substantially lower than the anisotropy field of the RL, and a magnetization equal to or higher than the magnetization of the RL. The FCL is saturated at a much lower field than the RL and thus channels the magnetic flux from the write head through the island positions. The dipolar fields from the RL above the FCL polarize the magnetization of the FCL parallel to the magnetization direction of the RL in the absence of an external field, to thereby enhance the readback signal.04-14-2011
20090135519Magnetic recording medium, method and apparatus for manufacturing magnetic recording apparatus - A magnetic recording medium includes a disk substrate, and recording cells arrayed on the disk substrate in a track direction, the recording cells includes a ferromagnetic pattern and a magnetic pattern formed on one of two sidewalls of the ferromagnetic pattern in the track direction and having a lower crystalline magnetic anisotropy constant Ku than that of the ferromagnetic pattern.05-28-2009
20090135518DISCRETE TRACK MAGNETIC MEDIA WITH DOMAIN WALL PINNING SITES - A magnetic recording medium with domain wall pinning sites including a substrate, a soft magnetic underlayer, and a magnetic recording layer overlying the soft magnetic underlayer. In one embodiment the magnetic recording layer has at least two grooves providing a track having first and second sidewalls formed by the grooves. The sidewalls provide a plurality of pinning sites formed between the sidewalls for pinning magnetic domain walls in the track. At least one of the pinning sites includes a first indentation in the first sidewall and a paired second indentation in the second sidewall. In one embodiment data can be stored within the magnetic recording layer by positioning a write head adjacent the track and inducing at least two magnetic domains defining a domain wall. The domain wall migrates to one of the pinning sites in the track.05-28-2009
20100290155METHOD OF MANUFACTURING PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - A method of manufacturing a perpendicular magnetic recording medium is provided which is capable of improving fineness of a particle diameter and vertical orientation of a perpendicular magnetic recording layer, improving corrosion resistance of the magnetic recording medium, and recording and reproducing high-density information. Provided is the method of manufacturing a perpendicular magnetic recording medium (11-18-2010
20100246060PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - The present invention relates to a perpendicular magnetic recording medium including a nonmagnetic substrate, and at least a soft magnetic layer (SUL), an alignment control layer, a magnetic recording layer and a protective layer formed on the nonmagnetic substrate, wherein the magnetic recording layer is constituted of two or more layers and includes a first magnetic recording layer and a second magnetic recording layer from the nonmagnetic substrate side and, regarding magnetocrystalline anisotropic energy K09-30-2010
20120127609SYSTEM, METHOD AND APPARATUS FOR PERPENDICULAR MAGNETIC RECORDING MEDIA HAVING DECOUPLED CONTROL AND GRADED ANISOTROPY - A structure for high performance perpendicular magnetic recording media has a substrate with a plurality of sequential layers including an adhesion layer, a first soft underlayer (SUL), a coupling layer, a second SUL, a seed layer, a Ru layer, and an onset layer; at least one oxide layer on the onset layer and having a composition with graded anisotropy to improve overwrite of the media; an exchange coupling layer (ECL) on the at least one oxide layer; a cap layer; a decoupling-controlled layer between the ECL and the cap layer to reduce lateral exchange coupling in the cap layer on the ECL; and a carbon overcoat on the cap layer.05-24-2012
20100079908Determining A Magnetic Sample Characteristic Using A Magnetic Field From A Domain Wall - A magnetic field generator that is formed from a magnetic thin film, e.g., of ferrimagnetic garnet with a two magnetic domains with a domain wall between the two magnetic domains, is provided. A localized magnetic field is produced by the domain wall and is used as a magnetic field source for a sample held on or near the surface of the magnetic thin film. The sample response to the magnetic field is measured for one or more positions of the domain wall with respect to the sample. From the measured response, a desired parameter may be determined and stored. The position of the domain wall may be oscillated at high frequency to produce a voltage signal in the inductive sample. Alternatively, distortions in the domain wall may be imaged and used to identify or characterize structures in the sample.04-01-2010
20120134049MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/REPRODUCTION APPARATUS - According to one embodiment, a magnetic recording medium includes a substrate, a soft magnetic layer, a multilayered underlayer formed on the soft magnetic layer, and a continuous film type magnetic recording layer formed on the multilayered underlayer. The multilayered underlayer includes a first underlayer made of copper and containing crystal grains having a (100)-oriented, face-centered cubic lattice structure, a second underlayer formed on the first underlayer and made of copper and nitrogen, and a third underlayer formed into islands on the second underlayer. The continuous film type magnetic recording layer contains at least one element selected from Fe and Co and at least one element selected from Pt and Pd, has the L105-31-2012
20120134048SPIN TORQUE OSCILLATOR AND MAGNETIC RECORDING APPARATUS - According to one embodiment, a spin torque oscillator includes a field generation layer, a spin injection layer including a first layer and a second layer, and an interlayer interposed between the field generation layer and the spin injection layer, wherein the first layer is interposed between the second layer and the interlayer and includes a (001)-oriented Heuslar magnetic alloy or a (001)-oriented magnetic material having a body-centered cubic lattice structure.05-31-2012
20090244772MAGNETIC HEAD SUBSTRATE, MAGNETIC HEAD AND RECORDING MEDIUM DRIVING DEVICE - The present invention relates to a magnetic head substrate comprising a sintered body containing 35% by mass to 60% by mass of alumina and 40% by mass to 65% by mass of a conductive compound. The conductive compound contains at least one selected from carbide, nitride and carbonitride of tungsten. The sintered body has a maximum crystal particle size of 4 μm or less (except for 0 μm). Furthermore, the present invention provides a magnetic head provided with a slider formed of the magnetic head substrate and a recording medium driving device provided with the magnetic head.10-01-2009
20090059421METHOD FOR MANUFACTURING A THIN CLOSURE MAGNETIC HEAD - A method of manufacturing thin closure magnetic read/write heads, such as magnetic tape heads is provided. The method provides improved flexural strength of the closure so that the closure breakage during fabrication of the heads is mitigated and closure thickness is reduced. An array of chips is fabricated on a wafer. The array is closed, with a closure strip bonded to each row of the array. Closures span only the length of a row, so that the closures are not subjected to flexure during processing and breakage due to flexure is mitigated. Side bars are bonded to the array to form a column with dimensions similar to prior art columns. This allows columns manufactured by the invention to undergo additional processing using existing processes.03-05-2009
20120075747SYSTEM, METHOD AND APPARATUS FOR SHAPE-ENGINEERED ISLANDS OF EXCHANGE SPRING OR EXCHANGE COUPLED COMPOSITE, BIT PATTERNED MEDIA - A hard disk drive has a magnetic media disk comprising a substrate having an axis, and an exchange coupled, bit patterned media on the substrate arranged in a plurality of tracks. Each of the tracks has a pattern of islands extending in an axial direction from the disk. Each island comprises a first layer having a first anisotropy and a first layer radial width, and a second layer on the first layer and having a second anisotropy that is lower than the first anisotropy. The second layer radial width is less than the first layer radial width.03-29-2012
20120257303MAGNETIC HEAD AND STORAGE SYSTEM - A magnetic head in one embodiment includes a first array of writers interleaved with readers; a second array of writers interleaved with readers, the writers of the first array being generally aligned with the writers of the second array in a direction of media travel relative thereto, the readers of the first array being generally aligned with the readers of the second array in a direction of media travel relative thereto; and a third array of writers interleaved with readers, the third array being positioned between the first and second arrays, the writers of the third array being generally aligned with the readers of the first and second arrays in a direction of media travel relative thereto, the readers of the third array being generally aligned with the writers of the first and second arrays in a direction of media travel relative thereto. Other embodiments are also presented.10-11-2012
20100328815MAGNETIC DISK DEVICE - Due to a difference in coefficient of linear expansion between the constituent material of the flange and the constituent material of the base of the feedthrough, the solder material which joins these materials is unable to withstand the thermomechanical loading that is generated between these heterogeneous materials during their actual usage for a long period and, as a result, cracks formed in the solder-joined portion therebetween create low-density gas leakage paths that reduce actual lifespan to less than 5 years. Disclosed is a magnetic disk device comprising a magnetic disk, a magnetic head for recording and reproducing information onto and from the magnetic disk, a base, a feedthrough solder-joined to the base, and a solder-joined portion for joining the base and the feedthrough, wherein a recess portion is provided in the perimeter edge of the solder-joined portion of the base.12-30-2010
20100014191PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCTION APPARATUS - This invention provides a perpendicular magnetic recording medium which has magnetic layers of a stabilized laminated structure and excels in the recording and reproducing property.01-21-2010
20120275059PERPENDICULAR MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/REPRODUCTION APPARATUS - According to one embodiment, a magnetic recording medium includes a substrate, an auxiliary layer formed on the substrate, and at least one perpendicular magnetic recording layer formed on the auxiliary layer. The perpendicular magnetic recording layer includes a magnetic dot pattern. The perpendicular magnetic recording layer is made of an alloy material containing one element selected from iron and cobalt, and one element selected from platinum and palladium. This alloy material has the L111-01-2012
20100232061ELECTRIC FIELD INFORMATION READING HEAD, ELECTRIC FIELD INFORMATION WRITING/READING HEAD AND FABRICATION METHODS THEREOF AND INFORMATION STORAGE DEVICE USING THE SAME - Provided is an electric field information reading head for reading information from a surface electric charge of an information storage medium, the electric field information reading head comprising a semiconductor substrate having a resistance region formed in a central part at one end of a surface facing a recording medium, the resistance region being lightly doped with impurities, and source and drain regions formed on both sides of the resistance region, the source region and the drain region being more highly doped with impurities than the resistance region. The source region and the drain region extend along the surface of the semiconductor substrate facing the recording medium, and electrodes are connected electrically with the source region and the drain region respectively. In addition, provided is a method of fabricating the electric field information reading head and a method of mass-producing the electric field information reading head on a wafer.09-16-2010
20130010386Magnetically Biased Write Pole - An apparatus and associated method provides a magnetic element, such as a data transducing head. A first permanent magnet may be configured to bias the write pole to decrease remnant magnetization and erasure after write (EAW). The first permanent magnet can be separated from the write pole be a predetermined distance.01-10-2013
20100091402Adhesion layer for thin film magnetic recording medium - The invention uses an adhesion layer of an amorphous alloy of aluminum. A first aluminum titanium embodiment of the amorphous adhesion layer preferably contains approximately equal amounts of aluminum and titanium (+/−5 at. %). A second embodiment of the amorphous adhesion layer preferably contains approximately equal amounts of aluminum and titanium (+/−5 at. %) and up to 10 at. % Zr with 5 at. % Zr being preferred. A third embodiment is aluminum tantalum preferably including from 15 to 25 at. % tantalum with 20 at. % being preferred. The most preferred compositions are Al04-15-2010
20080239566Electromagnetic data storage devices - A magnetic recording and reading device, free from coil windings, includes a naturally magnetic material that defines a pair of opposite magnetic poles and defines a magnetic field. A conductor in operable association with an integrated circuit array provided at each of the magnetic poles controls direction and flow of current in the conductors.10-02-2008
20080231991Method of Manufacturing a Magneto-Optical Device - Method of manufacturing a magneto-optical device, wherein at least one coil (09-25-2008
20080225435Magnetic writer for field assisted magnetic recording - A writer includes a write element having a tip portion for generating a write field and a conductive assembly that delivers a write assist current through the tip portion to generate a write assist field.09-18-2008
20120250186METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - A method for manufacturing a magnetic recording medium including at least a non-magnetic substrate, a soft magnetic underlayer, an orientation control layer that controls an orientation of an immediate upper layer, and a perpendicular magnetic layer in which a magnetization easy axis is mainly perpendicularly oriented with respect to the non-magnetic substrate so as to be laminated one another on the non-magnetic substrate. The perpendicular magnetic layer includes two or more magnetic layers, and each layer is subjected to a crystal growth such that each crystal grain composing each magnetic layer forms a columnar crystal continuous in a thickness direction together with the crystal grains composing the orientation control layer. The orientation control layer, formed of a Co—Cr alloy, is formed by the reactive sputtering using a mixture of a sputtering gas and nitrogen.10-04-2012
20130141818MAGNETIC STORAGE DEVICE - A write head for a magnetic storage device includes a writing tip comprising a magnetic material, a write pulse generator configured to generate a write pulse signal comprising a varying voltage bias between the magnetic storage device and the writing tip. The write pulse signal comprising one or more write pulses effective to tunnel electrons from the writing tip to the magnetic storage device. The data stream generator configured to provide a data stream signal to the writing tip where the data stream signal is operative to vary spin polarity in the electrons from a first polarity to a second polarity.06-06-2013
20120275060MAGNETIC HEAD WITH SPIN TORQUE OSCILLATOR AND MAGNETIC RECORDING HEAD - An example magnetic head includes a recording magnetic pole to generate a recording magnetic field; a spin torque oscillator formed in the vicinity of the recording magnetic pole; and a hard bias film for applying a magnetic field to the spin torque oscillator.11-01-2012
20120275058MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/REPRODUCTION APPARATUS - According to one embodiment, a magnetic recording medium includes a substrate, an auxiliary layer formed on the substrate, and at least one perpendicular magnetic recording layer formed on the auxiliary layer. The perpendicular magnetic recording layer includes a magnetic dot pattern. The perpendicular magnetic recording layer is made of an alloy material containing one element selected from iron and cobalt, and one element selected from platinum and palladium. This alloy material has the L111-01-2012
20120275057Hard Disk Drives With Improved Exiting Regions for Electrical Connectors and Related Methods - A hard disk drive of the invention comprises a housing comprising a base and a cover; at least one disk for storage of data within the housing; an actuator for reading and recording of the data on the at least one disk; and an electrical connector extending through an exiting portion of the base. The exiting portion comprises a recessed portion within the base providing an enlarged opening through which the electrical connector may exit the hard disk drive without direct constraint by the base. The electrical connector also provides electrical contact between electronics external to the housing and one or more component within the hard disk drive.11-01-2012
20120275056Hard Disk Drives With Improved Electrical Connectors and Related Methods - An improved hard disk drive of the invention comprises a housing, which comprises a base and a cover. The hard disk drive further internally comprises at least one disk for storage of data within the housing and an actuator for reading and recording of the data on the at least one disk. An electrical connector comprising a flexible circuit extends through an opening in the base and provides electrical contact between electronics external to the housing and one or more component within the hard disk drive. Methods for forming the improved hard disk drives are also disclosed.11-01-2012
20080266709Recording and/or Playback Device Comprising Multiple Magnetic Heads With Azimuth Gaps - A recording and/or read device of a magnetic medium with magnetic tracks, including plural magnetic heads each including a pair of polar parts separated by an amagnetic head gap. These pairs of polar parts are grouped on at least one support with a non zero tilt angle between ±90° from the tracks, all head gaps of the pairs of polar parts in the support having the same azimuth angle, between ±90° excluding limits from a direction normal to the support.10-30-2008
20120019959MAGNETIC RECORDING MEDIUM AND STORAGE APPARATUS - A magnetic recording medium includes a non-magnetic granular layer, and a recording layer provided on the non-magnetic granular layer, wherein the recording layer includes a first granular magnetic layer provided on the non-magnetic granular layer, and a second granular magnetic layer provided on the first granular magnetic layer, and a non-magnetic material magnetically separating metal grains of the non-magnetic granular layer is different from a non-magnetic material magnetically separating magnetic grains of the first granular magnetic layer.01-26-2012
20120057256Multi-Layer Sheet Product - A magnetically-activatable sheet product is provided comprising a pair of laminated outer sheets at least one of which is provided with a pigment/binder primer coat on its inward facing surface, between which is a magnetic layer comprising magnetically-activatable particles in a binder matrix, the outer sheets having sufficient opacity to mask the appearance of the magnetic layer.03-08-2012
20100073815MAGNETIC HEAD AND MAGNETIC DISK DEVICE - A magnetic head provided on a drain end side of a head substrate constituting a head slider includes a heater, a write coil, a shield, an insulation layer between the heater and the head substrate, a thermal insulation layer whose thermal conductivity is lower than the insulation layer and a thermal radiation layer whose thermal conductivity is higher than the shield, wherein the thermal insulation layer is disposed between the heater and the head substrate and the thermal radiation layer is disposed between the write coil and the head substrate.03-25-2010

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