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MAGNETIC RECORDING COMPONENT OR STOCK

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428 - Stock material or miscellaneous articles

Patent class list (only not empty are listed)

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Class / Patent application numberDescriptionNumber of patent applications / Date published
428826000 Thin film media 250
428846000 Magnetic recording media substrate 163
428810000 Magnetic head 160
428838000 Binder media 48
428817000 Magneto-optical media stock 5
20090246558INFORMATION RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME - An information recording medium, 10-01-2009
20080311429MAGNETIC FILM, MAGNETIC RECORDING/ REPRODUCING DEVICE, AND POLARIZATION CONVERSION COMPONENT - The disclosure provides a magnetic film which includes a titania nanosheet which is formed on a transparent substrate and contains a layered titanium oxide in which at least one magnetic element is substituted for a Ti lattice position, the titanium oxide being expressed by a formula: Ti12-18-2008
20080248334MOLD STRUCTURE, IMPRINTING METHOD USING THE SAME, MAGNETIC RECORDING MEDIUM AND PRODUCTION METHOD THEREOF - To provide a mold structure which is excellent in the transfer quality of a pattern to a substrate and superior in its separability from an imprint resist layer and which allows a high-quality pattern to be transferred and formed on discrete track media and patterned media. Specifically, there is a mold structure including: convex portions and concave portions formed on its surface, wherein the mold structure is used for transferring a concavo-convex pattern onto an imprint resist layer formed on a surface of a substrate having a thickness of 0.3 mm to 2.0 mm by pressing the convex portions and the concave portions against the imprint resist layer, and wherein a ten-point average roughness Rz10-09-2008
20110003176PROCESS FOR FORMING CONCAVO-CONVEX PATTERNS, AND PROCESS FOR MANUFACTURING MAGNETIC RECORDING MEDIA USING THE SAME - An object of the present invention is to provide a process for forming concavo-convex patterns which uses a resist-forming material having excellent oxygen etching resistance and long working life and which enables to carry out the imprinting (mold pressing) with good rectangular shape properties at normal temperature.01-06-2011
20080248333MOLD STRUCTURE, IMPRINTING METHOD USING THE SAME, MAGNETIC RECORDING MEDIUM AND PRODUCTION METHOD THEREOF - The present invention provides a mold structure including: a concavo-convex pattern formed on its surface, wherein the mold structure is used for transferring the concavo-convex pattern onto an imprint resist layer formed on a surface of a substrate having a thickness of 0.3 mm to 2.0 mm by placing the concavo-convex pattern against the imprint resist layer, and wherein a thickness Dm (mm) of the mold structure, a thickness Ds (mm) of the substrate and an area Si (mm10-09-2008
Entries
DocumentTitleDate
20100075178WRITING AND READING MULTI-LEVEL PATTERNED MAGNETIC RECORDING MEDIA - A method and apparatus for writing magnetization states in a pair of magnetic islands of a multi-level patterned magnetic recording medium and a method and apparatus for reading readback waveforms representing the written magnetization states of a pair of magnetic islands of a two-level patterned 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 island of the pair of magnetic islands. Reading the readback waveform representing the written magnetization state is implemented through use of a magnetic read head and includes: identifying the written magnetization state by decoding the readback waveform; and displaying and/or recording the written magnetization state.03-25-2010
20100035083MIXTURE OF LOW PROFILE LUBRICANT AND CYCLOPHOSPHAZENE COMPOUND - A composition comprising a mixture of a low profile lubricant and a compound comprising one or more cyclophosphazene rings. The low profile lubricant comprises a perfluoropolyether backbone, at least one functional group on each end of the backbone and at least one functional group located in a region of the backbone between the ends. Also a device comprising a magnetic disk and the composition on the magnetic disk.02-11-2010
20110003175COMPOSITE PERPENDICULAR MEDIA WITH GRADED ANISOTROPY LAYERS AND EXCHANGE BREAK LAYERS - A perpendicular magnetic recording layer may include a hard granular layer, an exchange break layer formed on the hard granular layer, and a soft granular layer formed on the exchange break layer. In some embodiments, the exchange break layer may consist essentially of ruthenium. In some embodiments, the perpendicular magnetic recording layer may include n magnetic layers and n−1 exchange break layers, where n is greater than or equal to three, and where the n−1 exchange break layers alternate with the n magnetic layers in the magnetic recording layer.01-06-2011
20110014496METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, there is provided a method of manufacturing a magnetic recording medium, including forming a first hard mask including carbon as a main component, a second hard mask including a main component other than carbon and a resist on a magnetic recording layer, contacting a stamper to the resist to transfer patterns of protrusions and recesses to the resist, removing residues in the recesses of the patterned resist, etching the second hard mask, etching the first hard mask, patterning the magnetic recording layer, and removing the first hard mask, the method further including, between etching the first hard mask and removing the first hard mask, removing the second hard mask remaining on the protrusions of the first hard mask, and removing a contaminating layer on a surface of the first hard mask by a mixed gas of oxygen-based gas and a fluorine compound.01-20-2011
20100062284METHOD OF MANUFACTURING GLASS SUBSTRATE FOR RECORDING MEDIUM, GLASS SUBSTRATE FOR RECORDING MEDIUM, RECORDING MEDIUM AND HOLDING JIG - Provided is a method of manufacturing a glass substrate efficiently via prevention of foreign matter adhesion to a glass substrate as to chemical strengthening. Disclosed is a method of manufacturing a glass substrate for a recording medium possessing the step of conducting a chemical strengthening process by which a glass substrate held by a holding jig and the holding jig are immersed in a chemical strengthening solution, and 103-11-2010
20130065083METHOD FOR PRODUCING MAGNETIC RECORDING MEDIUM - According to at least one embodiment, a metal peelable layer and a mask layer are formed on a magnetic recording layer, then, a projections pattern is formed on the mask layer, the projections pattern is transferred to the metal peelable layer and the magnetic recording layer in this order, and then the metal peelable layer is dissolved and removed by a solvent. The metal peelable layer is constituted of any of aluminum and an aluminum compound. An alkali solution is used as the solvent.03-14-2013
20090047547Nanopatterning of disk media with flash sacrificial layer in block copolymer lithography - A method for fabricating a patterned disk of a hard disk drive. The method includes forming a layer of magnetic material over a substrate and then forming a sacrificial flash layer over the layer of magnetic material. A co-polymer material is formed over the sacrificial flash layer and then a plurality of magnetic dots separated by a non-magnetic material are formed in the magnetic layer. The flash layer is preferably a FePt material with a non-magnetic Ag or Cu based alloy. Such material not only provides good adhesion between the co-polymer and magnetic layers but also diffuses into the grains of the magnetic material. The diffusion of the non-magnetic flash layer between the grains of the magnetic material reduces magnetic cross-talk and improves the signal to noise ratio of the disk.02-19-2009
20120237795MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME - According to one embodiment, a magnetic recording medium includes a substrate, a magnetic recording layer formed on the substrate and containing a magnetic material, and a protective layer. The magnetic recording layer includes a recording portion having patterns regularly arranged in the longitudinal direction, and a non-recording portion having saturation magnetization lower than that in the recording portion. The non-recording portion contains the magnetic material, a deactivating species which makes the value of saturation magnetization smaller than that of saturation magnetization in the recording portion, and the component of the protective layer.09-20-2012
20090291325Phosphazene Compound, Lubricant and Magentic Recording Medium Having Such Compound, Method of Preparation, and Method of Lubrication - A compound of the formula: (I) is provided, where R is selected from CF11-26-2009
20100021763EASY TO WRITE AND HARD TO DECAY MEDIA FOR HARD DISK DRIVE APPLICATIONS - A magnetic recording medium is presented, characterized by having a nonmonotonicity in the DCD curve, resulting in low dynamic coercivity when writing information to the medium, with high static coercivity and thermal stability during storage. A method is also presented for producing the magnetic recording medium of the present invention.01-28-2010
20090317662MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - A magnetic recording medium has magnetic patterns formed of a patterned ferromagnetic layer, and a non-magnetic layer including a component of the ferromagnetic layer and separating the magnetic patterns, in which a thickness “a” of the non-magnetic layer and a thickness “b” of the magnetic patterns satisfy a relationship of: a12-24-2009
20110129690TUNNELING MAGNETORESISTIVE ELEMENT INCLUDING MULTILAYER FREE MAGNETIC LAYER HAVING INSERTED NONMAGNETIC METAL SUBLAYER - A tunnel magnetoresistive element includes a laminate including a pinned magnetic layer, an insulating barrier layer, and a free magnetic layer. The insulating barrier layer is composed of Ti—Mg—O or Ti—O. The free magnetic layer includes an enhancement sublayer, a first soft magnetic sublayer, a nonmagnetic metal sublayer, and a second soft magnetic sublayer. For example, the enhancement sublayer is composed of Co—Fe, the first soft magnetic sublayer and the second soft magnetic sublayer are composed of Ni—Fe, and the nonmagnetic metal sublayer is composed of Ta. The total thickness of the average thickness of the enhancement sublayer and the average thickness of the first soft magnetic sublayer is in the range of 25 to 80 angstroms. Accordingly, the tunneling magnetoresistive element can consistently have a higher rate of resistance change than before.06-02-2011
20090087683Reaction Method and Apparatus and Method and Apparatus for Manufacturing Chemical Substance Using the Same - The present invention provides a reaction method for a reaction system generating gas by a reaction, comprising the steps of: providing a sealed mixing section for mixing a plurality of liquids to start a reaction and a degassing section having a gas-liquid interface for removing, from a reaction liquid, gas bubbles generated from a mixed reaction liquid, separately; and feeding the reaction liquid mixed in the mixing section to the degassing section, without being interfered by gas bubbles even in a reaction system where gas is generated by a reaction, so that it is possible to stabilize a reaction at the start of the reaction and in the progress of the reaction and stably feed liquid to a subsequent process.04-02-2009
20110293965LUBRICANT AND MAGNETIC DISK DEVICE USING SAME - In a lubricant including a structure of a polymer compound, the structure includes polar groups or side chains having polarity at terminal ends and in at least one intermediate portion of a main chain, and also includes non-polar side chains at the terminal ends or in the intermediate portions of the main chain. For example, any of —OH, —CH12-01-2011
20110143165LUBRICANT AND MAGNETIC DISK - A lubricant containing a compound of the formula (I)06-16-2011
20100035084Method for producing a cast piece - A method for producing a cast metal piece and a cast metal piece are provided. An information element includes at least one piece of information. The information element is produced from a magnetizable material and the information is deposited n the magnetizable material and is cast into the information element during casting of the price, the casting temperature being above the Curie temperature of the magnetizable material of the information element.02-11-2010
20090098411METHOD OF MANUFACTURING FERRITE POWDER, FERRITE POWDER, AND MAGNETIC RECORDING MEDIA - A method of manufacturing ferrite powder, by which a precursor obtained by an in-solution reaction method is heated at a temperature increase rate of 20° C./min or higher until arriving at a final temperature between 750 and 1200° C., the holding time at the final temperature being from 0 to 60 sec, and cooling from the final temperature to 300° C. being performed at a rate of 50° C./min or higher, to produce ferrite powder.04-16-2009
20100035085PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH IMPROVED MAGNETIC ANISOTROPY FIELD - A perpendicular magnetic recording medium comprising a substrate, a soft underlayer, a seed layer, a non-magnetic FCC NiW alloy underlayer, a non-magnetic HCP underlayer, and a magnetic layer. We have discovered that the combination of a seed layer comprising Ta and a NiW alloy underlayer uniquely improves media recording performance and thermal stability by achieving excellent coercivity of the thin bottom magnetic recording layer and narrow C axis orientation distribution.02-11-2010
20080286612Tunneling magnetic sensing element including Pt sublayer disposed between free magnetic sublayer and enhancing sublayer and method for producing tunneling magnetic sensing element - There is provided a tunneling magnetic sensing element having an insulating barrier layer composed of Ti—O, a high rate of resistance change (ΔR/R) compared with the known art, and an interlayer coupling magnetic field Hin lower than that in the known art while low RA is maintained and the coercivity of a free magnetic layer is maintained at a low level comparable to the known art; and a method for producing the tunneling magnetic sensing element. An insulating barrier layer is composed of Ti—O. A free magnetic layer is formed on the insulating barrier layer and has a laminated structure of an enhancing sublayer composed of a CoFe alloy, a Pt sublayer, and a soft magnetic sublayer composed of a NiFe alloy, stacked in that order from the bottom.11-20-2008
20100124671LOW COUPLING OXIDE MEDIA (LCOM) - A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm05-20-2010
20090087684METHOD OF MODIFYING SURFACE OF POWDER, MAGNETIC RECORDING MEDIUM, AND COATING MATERIAL - An aspect of the present invention relates to a method of modifying a surface of a powder, comprising mixing a powder with a heterocyclic compound comprising at least one hydroxylic group and/or carboxylic group. The present invention further relates to a magnetic recording medium and a coating material.04-02-2009
20090169922MAGNETIC DISK MANUFACTURING METHOD AND MAGNETIC DISK - In a method of manufacturing a magnetic disk including at least a substrate 07-02-2009
20110171493SPIN-TORQUE BASED MEMORY DEVICE USING A MAGNESIUM OXIDE TUNNEL BARRIER - A magnetic tunnel junction stack including a pinned magnetic layer, a tunnel barrier layer formed of magnesium oxide (MgO), a free magnetic layer adjacent to the tunnel barrier layer, and a layer of vanadium (V) adjacent to the free magnetic layer.07-14-2011
20110171492MAGNETIC DISK AND METHOD OF MANUFACTURING THE SAME - In a magnetic disk including a magnetic layer, a protecting layer and a lubricating layer on a substrate, the lubricating layer is formed by a self assembly monolayer. A material of the self assembly monolayer is a hydrocarbon-based silane agent or a partial fluorinated hydrocarbon-based silane agent. The magnetic layer and the protecting layer (P) are sequentially formed on the substrate, and then the substrate on which the magnetic layer and the protecting layer (P) are formed is immersed in a solution containing the hydrocarbon-based silane agent or the partial fluorinated hydrocarbon-based silane agent, and thus a lubricating layer (L) is formed on the protecting layer (P).07-14-2011
20090291326PROTECTIVE FILM MAINLY COMPOSED OF A TETRAHEDRAL AMORPHOUS CARBON FILM AND A MAGNETIC RECORDING MEDIUM HAVING THE PROTECTIVE FILM - A protective film is disclosed that is mainly composed of a tetrahedral amorphous carbon (ta-C film) that is denser than a DLC film formed by a plasma CVD method and containing aggregate particles so reduced as to a necessary and sufficient level, to provide a method of manufacturing such a protective film, and to provide a magnetic recording medium comprising such a protective film. The film is mainly composed of a ta-C film formed by a filtered cathodic arc method using a cathode target of glass state carbon. A magnetic recording medium is disclosed which includes a substrate, a magnetic recording layer, and the protective film mainly composed of a ta-C film.11-26-2009
20090004509PATTERNED MAGNETIC MEDIA FOR MAGNETIC RECORDING - A patterned magnetic media is disclosed. The patterned media includes etched recording portions including etched portions of a soft magnetic underlayer. In illustrated embodiments, the soft magnetic layer is etched to form recording bits or etched soft magnetic segments to enhance magnetic field strength in the magnetic recording portions. In other embodiments, soft magnetic layers are deposited in etched regions or areas of the media.01-01-2009
20090169923SUBSTRATE PROCESSING USING THE VAPOR SUPPLYING APPARATUS - A vapor supplying apparatus comprises a holding unit for holding a liquid or solid substance; cooling means for cooling the holding unit; detection means for detecting the temperature of the holding unit; and a control means for controlling said cooling means based on the temperature detected by the detection means. The temperature of the holding unit is adjusted by using the cooling means under the control of the control means, thereby to control vaporization or sublimation of the liquid or solid substance in supplying a vapor of the substance. Means for measuring the pressure of the vapor vaporized or sublimated from the liquid or the solid substance is provided under the atmosphere in which the water supplying apparatus is placed, and the control means controls the temperature of the holding unit so that the pressure of the vapor becomes a predetermined value based on the measured pressure.07-02-2009
20100081010IMPRINT MOLD STRUCTURE, MAGNETIC RECORDING MEDIUM AND METHOD FOR PRODUCING THE MAGNETIC RECORDING MEDIUM - To provide an imprint mold structure for producing a magnetic recording medium, the imprint mold structure including: a first pattern corresponding to servo areas, a second pattern corresponding to data areas, and a shape corresponding to one or more non-patterned areas, wherein the magnetic recording medium includes the servo areas where servo data is to be recorded, and the data areas which include a pattern to write user data on, and wherein the data areas have the one or more non-patterned areas which do not include a pattern to write user data on and which are substantially concentric areas each composed of two or more adjacent tracks located in the data areas.04-01-2010
20080292906Enhancement of Magnetic Media Recording Performance Using Ion Irradiation to Tailor Exchange Coupling - Magnetic medium recording performance can be enhanced by irradiating a magnetic medium with ions having an acceleration voltage of between 10 keV and 100 keV to induce exchange coupling between grains of the magnetic medium. The magnetic medium is exposed to a cumulative ion dosage of between 1011-27-2008
20080268288Spinodally Patterned Nanostructures - Devices based on spinodally decomposed periodic structures and their fabrication techniques.10-30-2008
20080261078PERPENDICULAR MAGNETIC RECORDING EXCHANGE-SPRING TYPE MEDIUM WITH A LATERAL COUPLING LAYER FOR INCREASING INTERGRANULAR EXCHANGE COUPLING IN THE LOWER MAGNETIC LAYER - A perpendicular magnetic recording system and medium has a multilayered recording layer that includes an exchange-spring structure and a ferromagnetic lateral coupling layer (LCL). The exchange-spring structure is made up of two ferromagnetically exchange-coupled magnetic layers (MAG10-23-2008
20090252991Iron Nitride-Based Magnetic Powder, Process for Producing the Same, and Magnetic Recording Medium - Provided is an iron nitride-based magnetic powder that comprises magnetic particles having a mean particle size of at most 20 nm. The magnetic particle has a core of a main phase of Fe10-08-2009
20100062282BIT PATTERNED MEDIA - The invention relates to bit patterned recording media having a stop layer for chemical mechanical polishing. One embodiment of the present invention is a method of manufacturing a magnetic recording medium comprising the step of planarizing by chemical mechanical polishing until the stop layer is reached. The present invention also provides a magnetic recording medium having a stop layer.03-11-2010
20100015471BIT-PATTERNED MAGNETIC MEDIA FORMED IN FILLER LAYER RECESSES - A recessed field is formed surrounding resist columns that are in a pattern of bit patterned magnetic media. A filler layer is formed in the recessed field. The resist columns are removed to leave recesses in the filler layer that replicate the pattern. Bit patterned magnetic media is formed in the recesses.01-21-2010
20100261040MODIFICATION OF MAGNETIC PROPERTIES OF FILMS USING ION AND NEUTRAL BEAM IMPLANTATION - Methods and apparatus for forming substrates having magnetically patterned surfaces is provided. A magnetic layer comprising one or more materials having magnetic properties is formed on the substrate. The magnetic layer is subjected to a patterning process in which selected portions of the surface of the magnetic layer are altered such that the altered portions have different magnetic properties from the non-altered portions without changing the topography of the substrate. A protective layer and a lubricant layer are deposited over the patterned magnetic layer. The patterning is accomplished through a number of alternative processes that expose substrates to energy of varying forms.10-14-2010
20100261038COMPOSITE MAGNETIC MATERIAL FOR MAGNET AND METHOD FOR MANUFACTURING SUCH MATERIAL - Provided is a composite magnetic material having high magnetic characteristics and high electrical resistivity to be used for a magnet, especially a composite magnetic material to be suitably used for a rotary motor magnet or the like which functions in a high frequency region. The composite magnetic material for the magnet is provided by covering the surface of a rare earth-iron-nitrogen based magnetic material with a ferrite based magnetic material.10-14-2010
20100273026Patterned Magnetic Recording Media By Selective Anodic Removal Of An Element - A patterned magnetic recording media and method thereof is provided. A recording layer comprises a continuous surface of more-noble elements and less-noble elements, such as CoXYZ, wherein X can be Pt, Pd, Ru, Rh, Ir, Os, or Au, wherein Y can be null or Cr, and wherein Z can be null, Cu, Ta, Ti, O, B, Ag, or TiO10-28-2010
20100261039MAGNETIC DISK AND METHOD OF MANUFACTURING THE SAME - Disclosed is a magnetic disk that has excellent durability, particularly excellent LUL durability, and excellent alumina resistance and has a high level of reliability under a low flying height of a magnetic head involved in a recent tendency toward a rapid increase in recording density and a very severe environment resistance requirement due to diversified applications. A magnetic disk (10-14-2010
20110111259Low-Field Magnetic Domain Wall Injection Pad and High-Density Storage Wire - Disclosed herein are magnetic storage devices and uses therefor. The devices comprise an injection pad and a nanowire extending from an outer edge of the injection pad. The injection pad and the nanowire of the disclosed magnetic storage devices have a geometry that is designed to optimize high density memory storage via low magnetic field domain wall shifting. The devices may be utilized, for example, for generating and storing magnetic domain walls for application in memory devices, sensor devices, and logic devices.05-12-2011
20100215988Methods of Preparing High Orientation Nanoparticle-Containing Sheets or Films Using Ionic Liquids, and the Sheets or Films Produced Thereby - A method is provided for the preparation of nanomaterials, which involves the dissolution and/or suspension of a combination of (a) one or more resin substrate materials and (b) one or more magnetic nanoparticutate substances, in a medium made from one or more ionic liquids, to provide a mixture, and recovering the solid nanomaterial by combining the mixture with a non-solvent (solvent for the ionic liquids but not the other components), while also applying an electromagnetic field to the mixture during the recovering step to align the magnetic nanoparticulate substances, along with the use of the resulting nanomaterials to provide unique information storage media, particularly in the form of sheets or films.08-26-2010
20120196152METHOD OF BONDING CONDUCTIVE MATERIAL TO STAINLESS STEEL, AND HDD MAGNETIC HEAD SUSPENSION - A method of bonding a conductive material to stainless steel includes: a first step of applying a conductive paste to a surface of a base plate made of the stainless steel; and a second step of removing, in an area located within the surface of the base plate and covered with the conductive paste, a part of a passivation film on a surface of the stainless steel without allowing a base material of the stainless steel of the base plate to come into contact with air. The removing of the passivation film is achieved, for example, by irradiation of laser light.08-02-2012
20100215989METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming a first hard mask, a second hard mask and a resist on a magnetic recording layer, imprinting a stamper to the resist to transfer patterns of protrusions and recesses to the resist, removing residues remaining in the recesses of the patterned resist, etching the second hard mask by using the patterned resist as a mask to transfer the patterns of protrusions and recesses to the second hard mask, etching the first hard mask by using the second hard mask as a mask to transfer the patterns of protrusions and recesses to the first hard mask, subjecting the magnetic recording layer exposed in the recesses to modifying treatment to change an etching rate, and deactivating the magnetic recording layer exposed in the recesses.08-26-2010
20100239887LUBRICANT AND MAGNETIC DISK - A lubricant containing a compound (A) comprising a perfluoropolyether having a main-chain structure of the formula (1) and having a polar group at each of opposite terminals thereof, and a compound (B) comprising a perfluoropolyether having a main-chain structure of the formula (1) and having a nonpolar group at least one terminal thereof09-23-2010
20100255348PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording medium 10-07-2010
20100255347INFORMATION RECORDING MEDIUM AND METHOD FOR MANUFACTURING SAME - A method for manufacturing an information recording medium may used for manufacturing the information recording medium which has a recording layer and a resin layer that may be provided in contact with the recording layer. In the method, the resin layer is made of at least two kinds of ultraviolet curing resins. First resin layer is formed by screen printing. Second resin layer is formed on the first resin layer as to compensate a surface property. Consequently, a surface nature of the resin layer can be improved.10-07-2010
20100086808METHOD OF FORMING A PROTECTIVE FILM FOR A MAGNETIC RECORDING MEDIUM, A PROTECTIVE FILM FORMED BY THE METHOD AND A MAGNETIC RECORDING MEDIUM HAVING THE PROTECTIVE FILM - A method of forming a protective film of a magnetic recording medium is provided that achieves a good bonding characteristic with a lubricant film and at the same time, suppressing adhesion of contamination gases, to attain a reduced thickness of the magnetic recording medium. The method includes forming a protective film on a lamination including a substrate and a metallic film layer formed on the substrate, by means of a plasma CVD method using a raw material of a hydrocarbon gas, and performing a surface treatment on the protective film. The surface treatment includes a plasma treatment with argon gas, and a plasma treatment with a gas containing at least nitrogen gas.04-08-2010
20090075121APPARATUS AND METHOD FOR FORMING CARBON PROTECTIVE LAYER - An apparatus and method for forming a carbon protective layer on a substrate using a plasma CVD method allows a more uniform in-plane distribution of the carbon protective layer thickness. The apparatus includes an annular anode that generates a plasma beam and a disk-shaped shield disposed between the anode and the substrate. The anode, the shield, and the substrate are concentrically arranged so that a straight line connecting the centers of the anode and the substrate is perpendicular to the deposition surface of the substrate where the carbon protective layer is to be formed. The center of the shield is also on the straight line.03-19-2009
20080274378MAGNETIC ALLOY FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS USING THE MAGNETIC ALLOY - A magnetic alloy for a magnetic recording medium contains 40 to 60 at % of Pt and 60 to 40 at % of at least three species selected from the group consisting of Fe, Co, Mn and Cr as 3d transition metal elements. The magnetic alloy has a Co content of 10 to 0 at %, has an average of valence electron numbers in the 3d transition metal elements of 7.5 to 8.0 based on compositional proportions and has an order parameter S of 0.5 to 1 that is calculated from: S=[{F(002)11-06-2008
20090110959MAGNETIC RECORDING MEDIUM FOR THERMALLY ASSISTED RECORDING - A magnetic recording medium for use in a thermally assisted recording system is disclosed. The magnetic recording medium comprises at least a magnetic layer, a protective layer and a lubricant layer formed on a nonmagnetic substrate, wherein a lubricant of the lubricant layer exhibits such a heat resistance that an amount of volatilization when the magnetic layer is heated to a temperature not lower than a temperature Tw is less than 1% with respect to an initial amount of the lubricant in an unheated condition. The present invention addresses a problem of the heat resistance performance of the lubricant for use in magnetic recording media and provides a magnetic recording medium exhibiting high heat resistance.04-30-2009
20100227200ABERRATION EVALUATION PATTERN, ABERRATION EVALUATION METHOD, ABERRATION CORRECTION METHOD, ELECTRON BEAM DRAWING APPARATUS, ELECTRON MICROSCOPE, MASTER, STAMPER, RECORDING MEDIUM, AND STRUCTURE - A method of evaluating astigmatism of an irradiation system irradiating an electron beam is disclosed. In this method, a figure pattern consisting of plural (for example, four) concentric circles is formed on a reference sample “WP” and an image (scanned image) is formed based on an electron signal obtained by scanning the electron beam onto the reference sample “WP”. In the scanned image, the image has a blur in a region with its longitudinal direction parallel to the generating direction of the astigmatism and the size of the blur depends on magnitude of the astigmatism. Therefore, the direction and the magnitude of the astigmatism of the irradiation system of an irradiation apparatus can be detected based on the obtained scanned image.09-09-2010
20110111257MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - A magnetic recording medium is provided which can record and reproduce high-density information by maintaining perpendicular orientation of a magnetic recording layer even with a decrease in thickness of nonmagnetic layers from an intermediate layer to a seed layer while decreasing the grain size of magnetic crystal grains to be consistent with an increase in recording density. A manufacturing method thereof and a magnetic recording and reproducing apparatus are also provided. The magnetic recording medium is a perpendicular magnetic recording medium including at least an underlying layer, an orientation control layer, a magnetic recording layer, and a protective layer formed on a nonmagnetic substrate. Here, the orientation control layer includes two or more layers of a seed layer and an intermediate layer from the substrate side. Materials of the seed layer and the intermediate layer are selected so that a contact angle of the intermediate layer material with respect to the seed layer material, which is amorphous, is in the range of 10 to 100 degrees.05-12-2011
20110111258RADIATION-CURABLE VINYL CHLORIDE COPOLYMER, RADIATION-CURABLE COMPOSITION, AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a radiation-curable vinyl chloride copolymer, which comprises a structural unit denoted by general formula (1):05-12-2011
20110117386MEDIA LUBRICANT FOR HIGH TEMPERATURE APPLICATION - A lubricant layer for a magnetic recording medium may include a perfluoropolyether having monomer units and end groups selected to provide high thermal stability and good reliability.05-19-2011
20110151278MAGNETIC DEVICES AND MAGNETIC MEDIA WITH GRAPHENE OVERCOAT - A magnetic disk according to one embodiment includes a recording layer; and a layer of graphene formed above the recording layer. A nucleation layer may be formed between the recording layer and the graphene layer in some approaches. A magnetic device according to another embodiment includes a transducer; a nucleation layer formed above the transducer; and a layer of graphene formed on the nucleation layer. A method according to one embodiment includes forming a nucleation layer above a magnetic layer of a magnetic disk or magnetic device; and forming a layer of graphene on the nucleation layer. A method according to another embodiment includes depositing SiC above a magnetic layer of a magnetic disk or magnetic device, the SiC being equivalent to several monolayers thick; and surface heating the SiC to selectively evaporate some of the Si from the SiC for forming a layer of graphene on a SiC layer. Additional products and methods are also presented.06-23-2011
20100055500OXIDE FINE PARTICLE POWDER AND PROCESS FOR ITS PRODUCTION, AND MAGNETIC RECORDING MEDIUM - The invention provides a process for production of an oxide fine particle powder including a heating step in which a dry powder of a metal complex gel is heat treated to obtain an oxide fine particle powder, wherein the heating step is carried out in two stages with different oxygen concentrations, or at least part of the heating step is carried out in a water vapor-containing atmosphere.03-04-2010
20100055499METHOD TO SYNTHESIZE ORDERED MAGNETIC ALLOYS AT LOW TEMPERATURE - The present invention relates to a method of synthesizing an ordered magnetic alloy comprising obtaining a substrate and performing sequential sputter deposition of multiple atomic monolayers of the magnetic alloy.03-04-2010
20110097600VERTICAL MAGNETIC RECORDING MEDIUM AND METHOD FOR MAKING VERTICAL MAGNETIC RECORDING MEDIUM - An object of the present invention is to provide a perpendicular magnetic recording medium 04-28-2011
20100062286MULTILAYER EXCHANGE SPRING RECORDING MEDIA - A multilayer exchange spring recording media consists of a magnetically hard magnetic storage layer strongly exchange coupled to a softer nucleation host. The strong exchange coupling can be through a coupling layer or direct. The hard magnetic storage layer has a strong perpendicular anisotropy. The nucleation host consists of one or more ferromagnetic coupled layers. For a multilayer nucleation host the anisotropy increases from layer to layer. The anisotropy in the softest layer of the nucleation host can be two times smaller than that of the hard magnetic storage layer. The lateral exchange between the grains is small. The nucleation host decreases the coercive field significantly while keeping the energy barrier of the hard layer almost unchanged. The coercive field of the total structure depends on one over number of layers in the nucleation host. The invention proposes a recording media that overcomes the writeability problem of perpendicular recording media.03-11-2010
20100062285MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer on a nonmagnetic organic material support, wherein the magnetic layer comprises a magnetic material comprising a hard magnetic material comprising a rare earth element, and on a portion of a surface of the hard magnetic material, a soft magnetic region, and the soft magnetic region is exchange-coupled with the hard magnetic material. Another aspect of the present invention relates to a method of manufacturing a magnetic recording medium comprising forming a hard magnetic layer by coating a coating liquid comprising a hard magnetic material comprising a rare earth element on a nonmagnetic organic material support, and forming, on at least a portion of a surface of the hard magnetic material comprised in the hard magnetic layer, a soft magnetic region, the soft magnetic region being exchange-coupled with the hard magnetic material.03-11-2010
20110076514MAGNETIC RECORDING MEDIUM - A magnetic recording medium includes a substrate; a magnetic recording layer that is provided on the substrate and that has a plurality of tracks; and a separation layer that magnetically separates respective tracks of the plurality of tracks of the magnetic recording layer from one another and that is composed of a material including a nonmagnetic amorphous alloy selected from the group consisting of chromium boride (CrB), nickel boride (NiB), chromium phosphide (CrP), and nickel phosphide (NiP). The nonmagnetic amorphous alloy is used as a filler material for the separation layer and has a smooth surface after filling and an excellent corrosion resistance. This enables production of the magnetic recording medium by a simple method so that producibility is excellent and without spoiling reliability.03-31-2011
20110070462PATTERN FORMING METHOD - Disclosed is a pattern forming method having a first step of forming a first ultraviolet curable resin layer on a substrate, a second step of leading a pattern-formed surface of a first mold wherein a predetermined pattern is formed to oppose the first ultraviolet curable resin layer, and attaching the substrate to the first mold by applying pressure, and a third step of irradiating diffused ultraviolet rays on the first ultraviolet curable resin layer, to which the pattern of the first mold is transferred by the pressure-attaching, the irradiated ultraviolet rays being diffused by disposing an ultraviolet light diffusion member between the ultraviolet curable resin layer and an ultraviolet light source.03-24-2011
20100310901METALLIC GLASS, MAGNETIC RECORDING MEDIUM USING THE SAME, AND METHOD OF MANUFACTURING THE MAGNETIC RECORDING MEDIUM - The present invention provides a metallic glass having a chemical composition represented by any one of the following formulae (1) to (3):12-09-2010
20100062283Magnetic Material - Disclosed is a magnetic material comprising a crystal of ε-Ga03-11-2010
20080248332Synthetic Resin Card and Method for Producing the Same - A synthetic resin card having a substantially planar core section and a first outer layer and a second outer layer laminated on front and back surfaces of the core section, respectively, the first outer layer and the second outer layer having molecular orientations, the difference Δ in the angle of orientation between the molecular orientations of the first and second outer layers is 20° or less, and at least one of the first and second outer layers is provided with a recording layer.10-09-2008
20090317661MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - A magnetic recording medium has recording regions including patterns of a magnetic material corresponding to servo signals and recording tracks, non-recording regions including an oxide of the magnetic material formed between the recording regions, and surface oxide films including an oxide of the magnetic material formed on surfaces of the recording regions.12-24-2009
20080318085METHOD OF FORMING A PROTECTIVE FILM AND A MAGNETIC RECORDING MEDIUM HAVING A PROTECTIVE FILM - A method of forming a carbon protective film is disclosed that improves electromagnetic conversion characteristics through reduction of the film thickness without any damage on a magnetic layer. Also disclosed is a magnetic recording medium that exhibits good electromagnetic conversion characteristics and corrosion resistance. The method of forming the carbon protective film uses a high frequency plasma CVD method on a disk including at least a magnetic film on a nonmagnetic substrate. A bias voltage in a range of −200 V to zero V is applied at the beginning of discharge in a process of forming the carbon protective film, and a bias voltage in a range of −500 V to −200 V is applied at the end of discharge. Also disclosed is a magnetic recording medium having at least a magnetic film and a protective film on a nonmagnetic substrate, wherein the protective film is formed by the method of forming a protective film stated above according to the invention.12-25-2008
20080213626METHOD OF MANUFACTURE OF GLASS SUBSTRATE FOR INFORMATION RECORDING MEDIUM, METHOD OF MANUFACTURE OF MAGNETIC RECORDING DISK, AND MAGNETIC RECORDING DISK - A method of manufacture of a glass substrate for a magnetic recording medium, which has both high substrate strength and low alkaline elution, includes an etching process of etching the inner-edge face of a donut-shaped glass substrate having an aluminosilicate composition, formed by removing the center portion of a die-molded disc-shaped glass substrate, and an alkali sealing process of performing alkali sealing treatment by proton substitution of alkali ions in the surface layer of the etched donut-shaped glass substrate. The process is used to manufacture a magnetic recording medium incorporating a glass substrate having a total alkaline elution amount of less than 3.1 μg/disk, wherein the magnetic recording medium has a transverse rupture strength greater than 132 N.09-04-2008
20100323219FeRh-FePt CORE SHELL NANOSTRUCTURE FOR ULTRA-HIGH DENSITY STORAGE MEDIA - Disclosed herein are methods and processes for making FeRh/FePt nanostructures and the use of these FeRh—FePt nanostructures as a magnetic recording media.12-23-2010
20100323223MAGNETIC RECORDING MEDIUM, METHOD FOR FABRICATING THE SAME, AND MAGNETIC STORAGE DEVICE - A discrete track medium and a patterned medium that are excellent in both magnetic recording properties and corrosion resistance are realized. The medium has a magnetic recording layer, which includes a magnetic region formed in a projection portion of a projection/recess pattern over a substrate and a filler region embedded in a recess portion of the projection/recess pattern, and an organic compound, which exhibits corrosion inhibition action for cobalt or cobalt alloys, between the magnetic region and the filler region.12-23-2010
20100323222MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME - A magnetic recording medium includes: a nonmagnetic support having both principal planes, a nonmagnetic layer formed on one principal plane of the nonmagnetic support and containing a nonmagnetic powder, a conductive particle and a binder, and a magnetic layer formed on the nonmagnetic layer and containing a magnetic powder, a conductive particle and a binder, wherein each of the nonmagnetic layer and the magnetic layer is prepared in a wet on dry mode, and a conduction point particle size of the conductive particle contained in the magnetic layer falls within the range of 3 times or more and not more than 5 times an average thickness of the magnetic layer.12-23-2010
20100323221MAGNETIC DISK AND MAGNETIC DISK MANUFACTURING METHOD - Provided is a magnetic disk (12-23-2010
20100323220PERPENDICULAR MAGNETIC RECORDING MEDIUM - A perpendicular magnetic recording medium includes a magnetic recording layer 12-23-2010
20100196737PATTERNED BURNISH HEAD - The present disclosure relates to a burnishing head for processing the surface of a hard disk media. The burnishing head includes a body having cutting features comprised of a thin film material. In many embodiments, the thin film material may be diamond. In some embodiments, the cutting features may be features formed in the diamond film. In alternative embodiments, the cutting features may be features formed in the body and coated with a diamond film. In another embodiment, the present disclosure relates to a burnishing head including a body having a first surface having a well-behaved air bearing surface and a second surface having a plurality of burnishing pedestals for providing burnishing of a media surface. The pedestals include a plurality of micro cutting features etched therein. The present disclosure also relates to magnetic media made at least in part by using such a burnishing head.08-05-2010
20100159281MAGNETIC RECORDING MEDIUM MANUFACTURING METHOD - According to one embodiment, an ultraviolet-curable resin material to be used contains a monomer represented by formula (1) presented earlier, a resin stamper is used as a stamper, and the surface of a magnetic recording layer and the three-dimensional pattern surface of the resin stamper are contacted in a vacuum.06-24-2010
20100159280PERPENDICULAR MAGNETIC RECORDING MEDIUM - A perpendicular magnetic recording medium includes a substrate, an antiferromagnetic layer disposed above the substrate, and a perpendicular magnetic recording layer formed on the antiferromagnetic layer and exchange-coupled to the antiferromagnetic layer.06-24-2010
20090197120MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING APPARATUS - A magnetic recording medium for vertical magnetic recording includes a substrate, and a layer laminated on the substrate, including a first magnetic recording layer made of a granular material, an exchange-coupling-strength control layer, a second magnetic recording layer made of a granular material, and a third magnetic recording layer made of a non-granular material.08-06-2009
20090197119PERPENDICULAR MAGNETIC RECORDING MEDIUM - Provided is a perpendicular magnetic recording medium. The perpendicular magnetic recording medium includes: a substrate; a plurality of soft magnetic layers including a lower soft magnetic layer and an upper soft magnetic layer which are sequentially stacked on the substrate, wherein the upper soft magnetic layer has an anisotropic field greater than that of the lower soft magnetic layer; an isolating layer interposed between the lower and upper soft magnetic layers and preventing magnetic interaction between the lower and upper soft magnetic layers; an underlayer formed on the plurality of soft magnetic layers; and a recording layer formed on the underlayer and including a plurality of ferromagnetic layers each layer of which has a magnetic anisotropic energy which decreases as distance increases from the underlayer.08-06-2009
20120308846FERROMAGNETIC GRAPHENES AND SPIN VALVE DEVICES INCLUDING THE SAME - A ferromagnetic graphene includes at least one antidot such that the ferromagnetic graphene has ferromagnetic characteristics. A spin valve device includes a ferromagnetic graphene. The ferromagnetic graphene includes a first region, a second region, and a third region. At least one antidot is formed in each of the first region and the third region. The first region and the third region are ferromagnetic regions, whereas the second region is a non-ferromagnetic region.12-06-2012
20100021766MAGNETIC STORAGE MEDIUM AND INFORMATION STORAGE DEVICE - A magnetic storage medium includes a seed layer made of non-magnetic and amorphous Co—Cr—W, an intermediate layer having a crystalline structure, which is made of a non-magnetic material on the seed layer and has a c-axis oriented in a thickness direction of the seed layer in a hexagonal close-packed structure, and a recording layer made of mainly a magnetic material on the intermediate layer and having information magnetically recorded therein.01-28-2010
20100021765THERMOPLASTIC POLYMER FOR ELECTRICALLY CONDUCTIVE THERMOFORMING APPLICATIONS - This invention relates to a thermoplastic polymer composition that exhibits excellent characteristics for being thermoformed into a wide variety of packaging trays for electronics, including the disk drive and semiconductor industries. More specifically, these trays are applicable as packaging material for head suspension assembly and offer conductivities in the range of antistatic to electrostatic dissipation (ESD). For instance, the thermoplastic polymer composition of this invention offers improved stiffness, improved chemical resistance, the capable of enduring more washing cycles, the capability of being dried at higher temperatures, improved cleanliness, and better electrical conductivity that conventional PETG/IDP polymer blends. The thermoplastic polymer composition of this invention is comprised of (1) a polyethylene terephthalate glycol copolyester, (2) from 1 weight percent to 6 weight percent carbon nanotubes, (3) from 2 weight percent to 30 weight percent of a copolymer of ethylene with a higher α-olefin, wherein the copolymer is of ethylene with the higher α-olefin is grafted with maleic anhydride or glycidyl methacrylate, (4) from 1 weight percent to 10 weight percent of a functionalized rubbery polymer, (5) from 1 weight percent to 10 weight percent of an acrylic based core-shell polymer, and (6) from 0.5 weight percent to 6 weight percent of a lubricant selected from the group consisting of high density polyethylene and polyester wax, where the polyethylene terephthalate glycol copolyester makes up the balance of the composition and wherein all weight percentages are based upon the total weight of the thermoplastic polymer composition.01-28-2010
20100021764METHODS AND SYSTEMS FOR CONFINING SENSE CURRENT OF A CPP READ TRANSDUCER TO THE ABS SIDE OF THE FREELAYER - A method in one embodiment includes forming a mask above a thin film sensor stack; forming an electrically insulating layer above the mask and sensor stack, the insulating layer having a portion extending along a nonhorizontal end of the mask; selectively removing the insulating layer except for the portion thereof extending along the nonhorizontal end of the mask; removing portions of the sensor stack that are not covered by the mask and the portion of the insulating layer, wherein an end of the portion of the insulating layer positioned away from the mask is about aligned with a back end of the sensor stack after removing the portions thereof; and removing the mask. Additional systems and methods are also presented.01-28-2010
20110117387METHOD FOR PRODUCING METAL NANODOTS - A method for fabricating metal nanodots on a substrate is provided. The method includes: preparing a nanoporous polysulfone membrane; applying the nanoporous polysulfone membrane onto a substrate; depositing a metal into the pores of the polysulfone membrane thereby forming metal nanodots on the substrate; and removing the nanoporous polysulfone membrane.05-19-2011
20110305924METALLIC MAGNETIC POWDER AND MANUFACTURING METHOD OF THE SAME, MAGNETIC PAINTING, MAGNETIC POWDER FOR MAGNETIC THERAPY, AND MAGNETIC RECORDING MEDIUM - A metallic magnetic powder where a primary particle of each metallic magnetic particle is a powder without forming an aggregate, and a method of making the same that includes manufacturing a metallic magnetic powder constituted of metallic magnetic particles, containing a metallic magnetic phase, with Fe, or Fe and Co as main components, rare earth elements , or yttrium and one or more non-magnetic components removing the non-magnetic component from the metallic magnetic with a reducing agent, while making a complexing agent exist for forming a complex with the non-magnetic component in water; oxidizing the metallic magnetic particle with the non-magnetic component removed; substituting water adhered to the oxidized metallic magnetic particle with an organic solvent; and12-15-2011
20110111260GLASS SUBSTRATE FOR INFORMATION RECORDING MEDIUM AND INFORMATION RECORDING MEDIUM - A glass substrate for information recording medium, said glass substrate being composed of an aluminosilicate glass containing 60-75% by mass of SiO05-12-2011
20110064969Magnetic Element Having Perpendicular Anisotropy With Enhanced Efficiency - Techniques and magnetic devices associated with a magnetic element that includes a fixed layer having a fixed layer magnetization and perpendicular anisotropy, a nonmagnetic spacer layer, and a free layer having a changeable free layer magnetization and perpendicular anisotropy.03-17-2011
20110076515Low-Coupling Oxide Media (LCOM) - A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the at least one low saturation magnetization layer has a saturation magnetization below that of the magnetic storage layer.03-31-2011
20120009439METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming protruded magnetic patterns on a substrate, depositing a nonmagnetic material in recesses between the magnetic patterns and on the magnetic patterns, and etching back the nonmagnetic material using an oxygen-containing etching gas while reforming a surface of the nonmagnetic material.01-12-2012
20110165438METHOD OF MANUFACTURING DISCRETE TRACK RECORDING MEDIUM AND DISCRETE TRACK RECORDING MEDIUM - According to one embodiment, a method of manufacturing a discrete track recording medium includes forming protruded magnetic patterns on a substrate, and repeating processes of depositing a nonmagnetic material so as to be filled in recesses between the magnetic patterns and etching back the nonmagnetic material two or more times with rotating the substrate in a plane thereof by an angle less than one revolution.07-07-2011
20120070692Perpendicular Magnetic Disc - [Problem] To make a film thinner while keeping a function as an auxiliary recording layer, and improve an SNR and an overwrite characteristic.03-22-2012
20110104516VERTICAL MAGNETIC RECORDING MEDIUM - An object of the present invention is to increase an electromagnetic transducing characteristic (in particular, SNR) by further promoting separation and isolation of magnetic grains of a magnetic recording layer (05-05-2011
20100092802MULTI-STEP ETCH PROCESS FOR GRANULAR MEDIA - A method of forming a granular magnetic recording medium comprises etching a cap layer disposed on a granular magnetic recording layer. The etching process is carried out at a varying ion energy, including a first ion energy and a lower subsequent second energy. A device including the etched cap layer is also disclosed.04-15-2010
20090130490APPARATUS, SYSTEM, AND METHOD FOR THE SELECTION OF PERPENDICULAR MEDIA SEGREGANT MATERIALS - A method for improving magnetic grain segregation in perpendicular recording media includes providing a substrate comprising a rigid support structure, depositing a soft underlayer on top of the substrate depositing an intermediate layer on top of the soft underlayer, providing a plurality of prospective segregants, determining the surface energies and the heat of formation of the prospective segregants and selecting the prospective segregant with a low surface energy and a high heat of formation. The method also includes providing at least one layer with surface energies progressively increasing to minimize the difference between the surface energy of a carbon overcoat and the segregant.05-21-2009
20100247963PERPENDICULAR MAGNETIC RECORDING MEDIUM - A perpendicular magnetic recording medium is used for information recording of a perpendicular magnetic recording type. The perpendicular magnetic recording medium includes a substrate, a soft magnetic layer, an underlayer, and a magnetic layer having a multilayered structure including a plurality of magnetic layers. The soft magnetic layer, the underlayer, and the magnetic layer are formed on the substrate. At least one of the magnetic layers includes CoPt magnetic grains containing oxide. The oxide includes at least one material selected from the group consisting of SiO09-30-2010
20100247965PERPENDICULAR MAGNETIC RECORDING MEDIUM - In a perpendicular magnetic recording medium having, over a substrate, a magnetic recording layer, an underlayer made of Ru or a Ru compound and provided below the magnetic recording layer, a pre-underlayer made of a nonmagnetic crystalline material, and a soft magnetic layer provided below the pre-underlayer, when the difference between the highest point and the lowest point of unevenness of the interface between the soft magnetic layer and the pre-underlayer, derived by a cross-sectional TEM image, is given as an interface roughness (nm) and the distance between the soft magnetic layer and the magnetic recording layer, excluding the soft magnetic layer and the magnetic recording layer, is given as a SUL-MAG distance (nm), interface roughness (nm)≦0.4 (nm) and interface roughness×SUL-MAG distance (nm)≦12 (nm) are satisfied.09-30-2010
20100247964PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording medium comprises a magnetic recording layer that records a signal, an underlayer formed of Ru or Ru compound below the magnetic recording layer, a non-magnetic layer formed of a non-magnetic material below the underlayer to control crystal orientation of the underlayer, a soft magnetic layer provided below the non-magnetic layer, and a substrate on which the magnetic recording layer, the underlayer, the non-magnetic layer, and the soft magnetic layer are formed. The non-magnetic layer comprises a first non-magnetic layer formed above the soft magnetic layer and a second non-magnetic layer formed above the first non-magnetic layer. The first non-magnetic layer is formed of amorphous Ni compound while the second non-magnetic layer is formed of crystalline Ni or crystalline Ni compound.09-30-2010
20100247962PERPENDICULAR 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 three or more layers and includes a first magnetic recording layer, a second magnetic recording layer and a third magnetic recording layer from the substrate side, and also includes an exchange coupling reduction layer for reducing exchange coupling of both layers between the second magnetic recording layer and the third magnetic recording layer and, regarding magnetocrystalline anisotropic energy K09-30-2010
20100247960PATTERNED ECC AND GRADIENT ANISOTROPY MEDIA THROUGH ELECTRODEPOSITION - An electrodeposited magnetic recording medium having multiple coercivity values is disclosed. In some embodiments, layers having different coercivity levels may be separated by exchange coupled composites and in other embodiments a range of coercivity levels are deposited in a gradient fashion. In some embodiments, the layers with multiple coercivity values comprise bit patterned media islands formed from a photoresist.09-30-2010
20100247961PERPENDICULAR MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS - In a perpendicular magnetic recording medium having at least a soft magnetic back layer, an underlayer, an intermediate layer and a perpendicular magnetic recording layer on a nonmagnetic substrate, at least one layer in the intermediate layer contains Re as a main component element and contains, as a second main component element, an element having an hcp structure or an element having a bcc structure. The concentration of Re as the main component element of the intermediate layer is within the range from 55 to 99.5 atomic percent. The second component element is Co or Cr.09-30-2010
20120219826LUBRICANT FOR HEAT ASSISTED MAGNETIC RECORDING - Compositions for use in lubricating thin film storage media are provided, as well as storage media formed using the compositions, the compositions including one or more central cores having a cyclic group, and a plurality of arms extending from the central cores, wherein each arm comprises phenol or piperonyl. Methods of preparing the compositions are also provided. Methods of preparing storage media that incorporate the compositions therein are further provided.08-30-2012
20100173173MAGNETIC STORAGE DEVICE - A magnetic storage device includes a laminated structure and a third magnetic body. The laminated structure includes a first magnetic body, a nonmagnetic body, and a second magnetic body which are laminated. The third magnetic body is provided at any of a first magnetic body side and a second magnetic body side. Resistance of the laminated structure is changed based on a difference between magnetization directions of the first magnetic body and the second magnetic body. A projection of the third magnetic body onto the first magnetic body at least partly overlaps the first magnetic body. The first magnetic body and the third magnetic body are magnetically coupled. A planar shape of the first magnetic body is a shape that is long in a first direction. A length of the third magnetic body is shorter than a length of the first magnetic body in the first direction. An aspect ratio of a length of a long-axis direction of the planar shape-of the first magnetic body divided by a length of a short-axis direction is greater than an aspect ratio of a length of a long-axis direction of a planar shape of the third magnetic body divided by a length of a short-axis direction.07-08-2010
20100173174PROCESS FOR PRODUCING MAGNETIC DEVICE, APPARATUS FOR PRODUCING MAGNETIC DEVICE, AND MAGNETIC DEVICE - A magnetic device manufacturing apparatus that increases the unidirectional anisotropy constant (JK). A substrate (S) is placed in a substrate holder (07-08-2010
20120251843LUBRICANT COMPOSITIONS - Compositions including one or more a central cores having a cyclic group, and a plurality of arms extending from the central cores, wherein the arms comprise perfluoropolyethers (PFPEs) or its derivatives. Methods of preparing the compositions are also provided. Methods of preparing storage media that incorporate the compositions therein are further provided.10-04-2012
20120251842LOW ROUGHNESS HEATSINK DESIGN FOR HEAT ASSISTED MAGNETIC RECORDING MEDIA - A magnetic recording medium comprises a substrate; a heatsink layer comprising a layer of crystallized CuTi; and a hard magnetic recording layer. The crystallized CuTi is applied in an amorphous state and then crystallized through heating. The use of this heatsink improves surface and underlayer roughness compared to previous heatsink designs.10-04-2012
20090017334RECORDING PAPER - A recording paper having a magnetic material-containing layer, that includes a magnetic material that generates a large Barkhausen effect and a filler, and is disposed between pulp layers containing a pulp.01-15-2009
20090311556SYNTHESIS, FUNCTIONALIZATION AND ASSEMBLY OF MONODISPERSE HIGH-COERCIVITY SILICA-CAPPED FePt NANOMAGNETS OF TUNABLE SIZE, COMPOSITION AND THERMAL STABILITY FROM IMCROEMULSIONS - A nanoparticle includes a metal core and an outer shell. The metal core includes a magnetic alloy of platinum and at least one additional metal. The outer shell is selected from the group consisting of silica, titania, metal nitride, and metal sulfide.12-17-2009
20120315504FLUOROPOLYETHER COMPOUND, LUBRICANT AND MAGNETIC DISK EACH CONTAINING THE SAME - A compound of the formula (1), lubricant containing the compound and magnetic disk12-13-2012
20100047625METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM - According to one embodiment, a method of manufacturing a magnetic recording medium includes forming a resist on a magnetic recording layer, imprinting a stamper to the resist to transfer patterns of protrusions and recesses, and partially etching the magnetic recording layer in areas not covered with patterns of the resist used as masks by ion beam etching using a mixed gas of He and N02-25-2010
20100273028FABRICATING MAGNETIC RECORDING MEDIA ON PATTERNED SEED LAYERS - Patterned media and associated methods of fabrication are provided in which vertical magnetic grains are grown on a patterned seed layer. The patterned seed layer includes a matrix of islands of a first seed material. Each island of first seed material is separated from other islands by a region of second seed material. The first seed material is selected to initiate growth of magnetic material, and the second seed material is selected to initiate growth of non-magnetic material. Subsequently, magnetic material is grown on the first seed material and non-magnetic material is grown on the second seed material. Deposition may be simultaneously. The magnetic and non-magnetic materials form well-defined vertical columns over the first and second seed materials respectively. Thus, each island behaves as an isolated magnetic unit, which switches independently from its neighbor units, which are magnetically separated by the non-magnetic material.10-28-2010
20100273027Magnetic printing stamp, method of manufacturing magnetic printing stamp and magnetic printing method - A magnetic printing stamp and a magnetic printing method using the same. The magnetic printing stamp may includes a plurality of servo regions having a magnetic body pattern and a plurality of data regions having no magnetic body pattern that are alternately formed, wherein a thickness of a portion of a substrate corresponding to each of the servo regions is less than a thickness of a portion of the substrate corresponding to each of the data regions. When a servo pattern is to be magnetically printed, the magnetic printing stamp and a magnetic recording medium uniformly and completely come in contact with each other. Thus, the magnetic printing stamp and the magnetic recording medium are prevented from being contaminated or damaged. In addition, excellent magnetic printing properties corresponding to an uneven pattern may be achieved.10-28-2010
20100009216PERFLUOROPOLYETHER LUBRICANT THIN FILM FOR THIN FILM STORAGE MEDIUM - The invention relates to a magnetic recording medium having a solid lubricant film layer which is deposited by plasma-enhanced chemical vapor deposition. The solid lubricant film comprises a perfluoropolyether, which is formed by the polymerization of a perfluorocycloalkane.01-14-2010
20100009217TRANSFER MOLD FOR MANUFACTURING RECORDING MEDIUM - A transfer mold for manufacturing a recording medium by imprinting, having a transfer surface on which a data area having a data track pattern for a disk-shaped recording medium and a dummy area having a dummy pattern in an outward portion and/or an inward portion of the data area are formed. The dummy pattern includes at least one line of a plurality of dummy protrusions that have a width in a disk radial direction of no less than a track pitch of the data track pattern.01-14-2010
20090068497METHOD FOR TESTING MOLD STRUCTURE, MOLD STRUCTURE, MOLD ORIGINAL MASTER, AND MAGNETIC RECORDING MEDIUM - The present invention provides a method for testing a disc shaped mold structure having a convexo-concave pattern formed on a surface thereof based on a desired design pattern, including at least: transferring a magnetic signal corresponding to a convexo-concave pattern formed on the entire surface of the mold structure to a medium in a direction perpendicular to the surface of the medium, obtaining a reproduction signal by electrically reproducing the magnetic signal from the medium onto which the magnetic signal has been transferred, and comparing the desired design pattern with the reproduction signal.03-12-2009
20110123830METALLIC MAGNETIC POWDER FOR MAGNETIC RECORDING AND PROCESS FOR PRODUCING THE METALLIC MAGNETIC POWDER - According to a method for producing a metallic magnetic powder for magnetic recording, which comprises treatment including, in sequence, a step of allowing a reducing agent to act on a metallic magnetic powder comprising particles having a metallic magnetic phase composed mainly of Fe or Fe and Co and containing one or more of rare earth elements (including Y), Al and Si (these are hereinafter referred to as “nonmagnetic ingredient”), in a liquid containing a complexing agent capable of forming a complex with at least one or more of the nonmagnetic ingredients, to thereby make the nonmagnetic ingredient in the powder particles dissolve out into the liquid (dissolution treatment step), a step of heat treatment in a reducing gas atmosphere (re-reduction treatment step), and a step of heat treatment in an oxidizing gas atmosphere (stabilization treatment step), a metallic magnetic powder for magnetic recording, which comprises particles having a particle length of from 10 nm to 45 nm and an axial ratio of 2 or more and in which the tip part of the particles is rounded, is obtained.05-26-2011
20120231296METHOD FOR MANUFACTURING AN ADVANCED MAGNETIC READ SENSOR - A method for manufacturing a magnetic sensor that minimizes topography resulting from stripe height defining masking and patterning in order to facilitate definition of track width. The method includes depositing a series of mask layers and then masking and ion milling the series of sensor layers to define a back edge of a sensor. A non-magnetic fill layer is then deposited, the magnetic fill layer being constructed of a material that has an ion mill rate that is similar to that of the series of sensor layers. A second masking and milling process is then performed to define the track width of the sensor and hard bias is deposited. Because the non-magnetic fill layer is removed at substantially the same rate as the sensor material the structure has a very flat topography on which to form the sensor track width.09-13-2012
20110236722COATING METHOD AND APPARATUS, METHOD OF MAKING SUBSTRATE ROLL, AND MAGNETIC TAPE - A method of coating a moving web of a substrate with a coating, includes applying the coating to the substrate to provide a coating thickness distribution curve along a width direction of the substrate such that: the coating thickness decreases from a position where the thickness is the maximum to the opposite ends of the curve and that the distribution curve has the least curvature at the position with the maximum thickness and contains an end portion having a larger curvature than that of the position with the maximum thickness on both sides of the position with the maximum thickness.09-29-2011
20100233513MAGNETIC RECORDING MEDIUM - A magnetic recording medium includes a nonmagnetic substrate and at least a magnetic layer, a protective layer, and a lubricating layer provided on the nonmagnetic substrate. The magnetic recording medium is characterized in that the lubricating layer is formed of a lubricating agent represented by general formulas (1), (2) or (3), in which substituents R09-16-2010
20110159316MAGNETORESISTIVE DEVICE WITH PERPENDICULAR MAGNETIZATION - A magnetoresistive device with perpendicular magnetization includes a magnetic reference layer, a first magnetic multi-layer film, a tunneling barrier layer, a second magnetic multi-layer film, and a magnetic free layer. The magnetic reference layer has a first magnetization direction, perpendicular to the magnetic reference layer. The first magnetic multi-layer film, having non-magnetic material layer, is disposed in contact on the magnetic reference layer. The tunneling barrier layer is disposed in contact on the first magnetic multi-layer film. The second magnetic multi-layer film, having non-magnetic material layer, is disposed in contact on the tunneling barrier layer. The magnetic free layer is disposed in contact on the second magnetic multi-layer film, having a second magnetization direction capable of being switched to be parallel or anti-parallel to the first magnetization direction.06-30-2011
20120251844MAGNETIC RECORDING POWDER AND METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to magnetic recording powder, which comprises hexagonal ferrite magnetic particles, the hexagonal ferrite magnetic particle comprising 0.5 to 5.0 atomic percent of an Fe substitution element in the form of just a divalent element per 100 atomic percent of a content of Fe and having an activation volume ranging from 1,200 to 1,800 nm10-04-2012
20110268990PERPENDICULAR MAGNETIC DISC - An object of the present invention is to achieve thinning of an auxiliary recording layer while maintaining the function thereof to improve SNR.11-03-2011
20130095349READER STOP-LAYERS - Tolerances for manufacturing reader structures for transducer heads continue to grow smaller and storage density in corresponding storage media increases. Reader stop layers may be utilized during manufacturing of reader structures to protect various layers of the reader structure from recession and/or scratches while processing other non-protected layers of the reader structure. For example, the stop layer may have a very low polish rate during mechanical or chemical-mechanical polishing. Surrounding areas may be significantly polished while a structure protected by a stop layer with a very low polish rate is substantially unaffected. The stop layer may then be removed via etching, for example, after the mechanical or chemical-mechanical polishing is completed.04-18-2013
20130157082PERFLUORINATED POLYETHERS (PFPE) AS MAGNETIC LUBRICANTS - A surface agent includes two end portions and a middle portion disposed between the end portions. The end portions include an anchor group or a truncation group. The anchor group includes at least one surface active functional group. The midsection includes at least one perfluoroalkyl-branched perfluorinated ether unit.06-20-2013
20130149558MAGNETIC MEDIA HAVING ULTRA THIN BONDED LUBRICATION LAYER - A method for manufacturing a magnetic media having an extremely thin lubricant layer on a magnetic media. The thin lubricant layer decreases magnetic spacing to maximize magnetic performance of the magnetic data recording system. The lubricant layer is formed by first depositing a lubricant that includes two different lubricant materials, one bonded and the other non-bonded. After lubricant deposition a burnishing process can be performed, with the lubricant being thick enough for effective burnishing. Then, the disk is exposed to a solvent vapor, which removes most of the lubricant leaving only a very thin layer of the bonded lubricant material.06-13-2013
20080241595Magnetic recording medium - A magnetic recording medium includes a soft magnetic underlayer formed on a substrate, magnetic patterns made of a ferromagnetic material and provided separately on the soft magnetic underlayer, and a nonmagnetic layer including two sublayers or more of a same material and formed on the soft magnetic underlayer between the magnetic patterns.10-02-2008
20100310902DRY ETCHING METHOD, MAGNETO-RESISTIVE ELEMENT, AND METHOD AND APPARATUS FOR MANUFACTURING THE SAME - In a method of manufacturing a magneto-resistance element having a multi-layer film including magnetic layers, TaO12-09-2010
20100316889CURABLE COMPOSITION FOR TRANSFER MATERIALS AND METHOD FOR FORMING MICROPATTERN USING THE CURABLE COMPOSITION - The present invention has an object to provide a curable composition for transfer materials. The curable composition is applicable to a UV nanoimprint process capable of forming micropatterns with high throughput, is applicable to a thermal nanoimprint process in some cases, and is capable of forming a micropattern having high selectivity on etching rates regarding a fluorine-based gas and an oxygen gas. The curable composition for transfer materials comprises a silsesquioxane skeleton-containing compound having, in its molecule, a specific silsesquioxane skeleton and a curable functional group.12-16-2010
20130157083UV CROSS-LINKING NEAT LUBRICANT MIXTURES FOR MAGNETIC RECORDING MEDIA - A method, system and apparatus are disclosed for forming a lubricant film for magnetic recording applications. The method includes, in certain embodiments, providing at least one substantially solvent free lubricant having a plurality of lubricant molecules with each lubricant molecule comprising a polymer chain having a backbone section and at least one functional end group. The method also includes treating the at least one substantially solvent free lubricant with a physical treatment to cross-link the backbone section of each polymer chain with at least one other molecule to create a cross-linked lubricant.06-20-2013
20110305923UTILIZING POLYMER STRUCTURES IN PLANARIZED MAGNETIC MEDIA - Magnetic recording disks and associated fabrication methods are described for utilizing polymer structures in planarized magnetic media. A polymer fill material is deposited on the disk and a removal process is performed on the fill material to planarize the disk. In some embodiments, the fill material is deposited subsequent to bonding a lubrication layer to a protective layer on the disk. In other embodiments, the fill material is bonded directly to a protective layer on the disk.12-15-2011

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