Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Coil

Subclass of:

360 - Dynamic magnetic information storage or retrieval

360110000 - HEAD

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
360123010 Coil 89
20090154011MAGNETIC WRITE HEAD HAVING HELICAL COIL WITH A FIN STRUCTURE FOR REDUCED HEAT INDUCED PROTRUSION - A magnetic write head having a write coil configured to dissipate heat away from the write head to minimize thermal protrusion. The write coil is formed as a helical coil having upper and lower leads that are connected by electrically conductive studs formed therebetween. The first and leads extend beyond the studs to form heat conducting fins that conduct heat away from the write head where it can be dissipated into surrounding structure.06-18-2009
20100195247MICROWAVE-ASSISTED MAGNETIC RECORDING DEVICE AND METHOD OF FORMATION THEREOF - A magnetic head, according to one embodiment, includes a microwave generator provided with a main magnetic pole, an auxiliary magnetic pole, a coil wound around a magnetic circuit, the magnetic circuit including the main magnetic pole and the auxiliary magnetic pole, and a magnetic film, the film being provided near an ABS side of the main magnetic pole. A first distance in an element thickness direction between film surfaces of the magnetic film and the main magnetic pole at a top end in an element height direction of the microwave generator is greater than a second distance between film surfaces of the magnetic film comprising the microwave generator and the main magnetic pole at the ABS. In other approaches, the main magnetic pole may have a shape which gradually widens from a flare point away from the ABS in an element height direction. Additional systems and methods are also presented.08-05-2010
20090168239Adjustable voice coil motor driver - A method of configuring a signal for controlling a voice coil motor (VCM) is disclosed. A voltage at an error amplifier of a VCM driver is accessed. A target value at the error amplifier is accessed. A difference value between the target value and the voltage is determined. An impedance value of the variable compensation coupled with the error amplifier is adjusted, based on the difference value.07-02-2009
20080291571MAGNETIC HEAD AND INFORMATION STORAGE DEVICE - A magnetic head of the present invention includes a magnetic pole that faces a surface of a recording medium, moves relative to the surface in a direction along the surface, and produces a line of magnetic force intersecting the surface of the recording medium; and a coil that excites the magnetic pole, wherein the magnetic pole includes a laminate with a coercivity of 800 A/m or less, the laminate including two or more layers stacked in a direction along the movement relative to the surface of the recording medium, the two or more layers including a first magnetic layer located at a frontmost position of the movement, and a second magnetic layer located at a rearmost position of the movement, the second magnetic layer having a saturation magnetic flux density higher than a saturation magnetic flux density of the first magnetic layer.11-27-2008
20100265617MAGNETIC HEAD - To provide a magnetic head provided with a microprocessor capable of storing a firmware downloaded from an external server. The magnetic head has a core which is provided with a coil for converting data stored in a magnetic card to analog signals, an A/D conversion chip which is connected to the core to convert the analog signals to digital signals, and the microprocessor which is connected to the A/D conversion chip. The processor has a firmware storage means. When the firmware which controls its arithmetic/storage functions and controls an external hardware is downloaded from the external server (10-21-2010
20100157471WRITE HEAD WITH DIFFERENT UPPER AND LOWER YOKE LENGTHS AND METHODS FOR MAKING THE SAME - According to one embodiment, a system comprises an upper yoke having a first length defined between a pole tip thereof and a back gap thereof. In addition, the system includes a lower yoke having a second length defined between a pole tip thereof and a back gap thereof, the second length being greater than the first length. Also, the system includes coil turns in the upper and lower yokes. Additional systems and methods are also presented.06-24-2010
20100002337MAGNETIC RECORDING APPARATUS, RECORDING HEAD, AND MAGNETIC RECORDING METHOD - According to one embodiment, a magnetic recording apparatus includes a current modulator and a recording head. The current modulator modulates current according to codes with run-length limitation in which a run-length is limited to a predetermined number. The recording head moves relative to the surface of a magnetic recording medium where the information is recorded based on directions of magnetizations and forms the magnetizations by the modulated current. The recording head includes a coil and a magnetic core. The coil generates a magnetic field corresponding to the modulated current. The magnetic core extends inside the coil with an end facing the magnetic recording medium. The magnetic core forms the magnetizations by guiding and applying the magnetic field from the end to the magnetic recording medium. The length of the end in the direction in which the magnetizations are aligned is not less than a length of the predetermined number.01-07-2010
20080310051Miniature Shielded Magnetic Component - Low profile, shielded magnetic components having self centering core and coil assemblies.12-18-2008
20090141398MAGNETIC HEAD AND STORAGE APPARATUS - A magnetic head has a magnetic main pole and a coil for generating a magnetic flux at the magnetic main pole by energizing the coil. The magnetic main pole is formed as a multi layer structure including at least one magnetic layer and at least one FeRh alloy layer.06-04-2009
20100134922Magnetic recording head, magnetic head assembly, magnetic recording apparatus, and magnetic recording method - A magnetic recording head includes a first magnetic pole, a second magnetic pole, a spin torque oscillator, a first coil, a second coil, and a third coil. The first magnetic pole applies a recording magnetic field to a magnetic recording medium. The second magnetic pole is provided parallel to the first magnetic pole. At least a portion of the spin torque oscillator is provided between the first magnetic pole and the second magnetic pole. The first coil magnetizes the first magnetic pole. A current is passed through the second coil independently of the first coil. A current is passed through the third coil independently of both the first coil and the second coil.06-03-2010
20100134921STORAGE DEVICE - According to one embodiment, a storage device includes a coil supporting arm, an actuator, and a magnetic circuit. The coil supporting arm includes a flat coil and a coil supporting module that is coupled with the inner circumference of the flat coil to support the flat coil. The actuator holds a head at one end and is provided with the coil supporting arm at another end. The magnetic circuit is arranged near the flat coil to drive the actuator.06-03-2010
20080204931HARD DISK DRIVE APPARATUS - A hard disk drive apparatus includes a magnetic head having a write head to record data on a disk and a read head to read the data recorded on the disk, at least one actuator arm on which the magnetic head is mounted, a voice coil motor to rotate the at least one actuator arm across the disk, a printed circuit board electrically connected to the write head, the read head, and the voice coil motor, and a flexible printed circuit having at least one write trace to electrically connect the write head and the printed circuit board, at least one read trace to electrically connect the read head and the printed circuit board, and a voice coil motor trace to electrically connect the voice coil motor and the printed circuit board. In the hard disk drive, the write trace is arranged between the read trace and the voice coil motor trace.08-28-2008
20120063031Tranducing head writer having write pole bridge feature, and devices thereof - A transducing head writer comprising a write pole having write pole tip, a yoke disposed on the write pole at a location that is recessed from the write pole tip, and a bridge feature disposed on the write pole between the yoke and the write pole tip, where the bridge feature has a geometry that is larger at a recessed end adjacent to the yoke compared to a proximate end adjacent to the write pole tip.03-15-2012
20100290157Damascene coil processes and structures - A magnetic recording head is provided. The magnetic recording head comprises a write pole and a write coil structure configured to generate a magnetic field in the write pole. The write coil structure comprises a substrate layer and a coil material disposed within the substrate layer. The write coil structure is substantially free of photoresist. A method for forming a write coil structure is also provided. The method comprises the steps of providing a substrate layer, forming a photoresist pattern mask over the substrate layer, opening a damascene trench in the substrate layer by reactive ion etching, and disposing a coil material into the damascene trench in the substrate layer.11-18-2010
20090059425THIN FILM PERPENDICULAR MAGNETIC RECORDING HEAD, THEIR FABRICATION PROCESS AND MAGNETIC DISK DRIVE USING IT - Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field, while also being modified to suppress remanent magnetic fields occurring immediately after writing operation. A return path is provided for supplying a magnetic flux to the main pole, and an conductive coil for excitation of the main pole and return path. The main pole has a pole width of 200 nanometers or less, and a magnetic multilayer made up of a high saturation flux density layer and low saturation flux density layer. The low saturation flux density layer and the high saturation flux density suppress remanent magnetization and prevent erasing after writing by utilizing a closed magnetic domain structure in the pole.03-05-2009
20090059424MAGNETIC HEAD, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING APPARATUS USING THE MAGNETIC HEAD AND MAGNETIC RECORDING MEDIUM - Provided are a magnetic head, a magnetic recording medium, and a magnetic recording apparatus using the magnetic head and the magnetic recording medium. The magnetic head is used for magnetically recording data on a magnetic recording medium and includes a main pole; a return-yoke forming a magnetic path along with the main pole; a coil for inducing a magnetic field to emit a magnetic field for magnetic recording through an end tip of the main pole near a magnetic recording medium; and an insulating layer for electrically insulating the main pole from the return-yoke. The main pole is electrically connected to an external device and generates an electric field for assisting magnetic recording along the magnetic field for magnetic recording. In this structure, the coercive force of a magnetic recording layer can be reduced during magnetic recording so that data can be recorded at high density.03-05-2009
20090103209Apparatus for Accessing Storage Media - A pickup for accessing moving storage media with a flat coil on a surface of a carrier, where for inserting an ohmic resistance into the coil circuit the same carrier has on one of its surfaces a conducting lead designed mainly to exhibit ohmic resistance and connected to the flat coil in series. With a meandering design, the conducting lead can be manufactured from a strip of metal substrate the same width as that of the flat coil. An apparatus for accessing moving storage media having the pickup.04-23-2009
20100188774PLANAR MAGNETIC WRITER HAVING OFFSET PORTIONS - A magnetic head in one embodiment includes a bottom pole; a top pole positioned above a plane extending through the bottom pole and parallel to a plane of deposition of the bottom pole, wherein the top pole is at least partially offset from the bottom pole in a direction parallel to a plane of deposition of the top pole; a first write gap in the top pole; and a first coil for generating a magnetic flux across the first write gap. A method in one embodiment includes forming a bottom pole; forming a top pole above a plane extending through the bottom pole and parallel to a plane of deposition of the bottom pole, wherein the top pole is at least partially offset from the bottom pole in a direction parallel to a plane of deposition of the top pole, wherein at least one write gap is formed in the top pole; forming side poles for coupling the top and bottom poles; and forming a first coil for generating a magnetic flux across the first write gap.07-29-2010
20130120875HIGH-FREQUENCY MAGNETIC FIELD GENERATION ELEMENT AND MAGNETIC HEAD - According to one embodiment, a high-frequency magnetic field generation element includes a first fixed layer, a first free layer, and a second free layer. A direction of a magnetization of the first fixed layer is fixed and has a component parallel to a first direction. A direction of a magnetization of the first free layer is variable and has a component orthogonal to the first direction. A direction of a magnetization of the second free layer is variable and has a component orthogonal to the first direction. The first fixed layer is provided between the first free layer and the second free layer. The magnetizations of the first free layer and the second free layer oscillate. A rotation direction of the magnetization of the first free layer is opposite to a rotation direction of the magnetization of the second free layer.05-16-2013
20110273797Write Head Having a Device for Reducing the Effects of Stray Flux - A magnetic write head with a flux opposing structure for opposing stray flux from an external source. The write head includes a yoke with two poles and a non-magnetic gap formed there between, and functions to write data to a magnetic storage medium. The flux opposing structure is proximate to the first pole and has a separation from an exterior surface of the first pole. A current applied to the secondary coil to create a secondary flux field with an opposite polarity of a first magnetic flux. The secondary flux field opposes the stray flux associated with the primary flux field of the magnetic write head and/or a neighboring magnetic write head.11-10-2011
20080198507Magnetic head and method of manufacturing the same - Embodiments of the present invention help to suppress broadening of a write field of a main pole of a perpendicular recording head and realize high-quality write operation. According to one embodiment, a main pole of a write head extends to an air bearing surface or a medium-facing surface and has an inverted trapezoid in cross-section. First soft magnetic films called side shields are separately disposed through a nonmagnetic film on both sides of the main pole. The air bearing surface side end of the first soft magnetic film is provided to recede from the air bearing surface. The first soft magnetic film and the main pole are formed in the same layer. A second soft magnetic film called a trailing shield is provided above the main pole on the air bearing surface side via a nonmagnetic film.08-21-2008
360123020 For perpendicular recording head 64
20130215532RECORDING HEAD AND DISK DRIVE WITH THE SAME - According to one embodiment, a main pole of a recording head includes a first magnetic pole layer and a second magnetic pole layer laminated on the trailing side of the first magnetic pole layer. The first magnetic pole layer includes a tapered portion and a first tip portion. The second magnetic pole layer includes a tapered portion and a second tip portion. A width in a track direction of the second tip portion is smaller than that of the first tip portion. The high-frequency oscillator is between the second tip portion and the trailing shield and includes a width in the track direction substantially equal to the width in the track direction of the second tip portion, and a height of the first tip portion is taller than that of the second tip portion.08-22-2013
20080304179PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING SAME - In a perpendicular magnetic recording head comprising a main magnetic pole layer and a return yoke layer which are laminated with a magnetic gap layer interposed therebetween, a nonmagnetic throat height determining layer and a return yoke reinforcement layer made of a magnetic material having a saturated magnetic flux density higher than that of the return yoke layer are provided on the magnetic gap layer. The nonmagnetic throat height determining layer has a front end face parallel to the medium-opposing surface at a position retracted by a desirable throat height from the medium-opposing surface. The return yoke reinforcement layer is formed directly under the return yoke layer so as to extend at least from the front end face of the nonmagnetic throat height determining layer to the upper face thereof, and is exposed at the medium-opposing surface between the magnetic gap layer and return yoke layer.12-11-2008
20080239569PERPENDICULAR MAGNETIC RECORDING HEAD - A perpendicular magnetic recording head includes a main magnetic pole layer and an auxiliary yoke layer that overlaps the main magnetic pole layer as viewed in a top view and is magnetically coupled to the main magnetic pole layer. The main magnetic pole layer includes a pole straight part exposed to an opposing surface opposite a recording medium, and a flared part that extends from the pole straight part in a height direction, the flared part broadening in a track width direction as the flared part extends in the height direction. The auxiliary yoke layer includes a flared part that extends from the recording medium-opposing surface, the flared part broadening in the track width direction as the flared part extends in the height direction. The flared part of the auxiliary yoke layer is disposed at a position located closer to the rear side in the height direction than the flared part of the main magnetic pole layer. The flared part of the main magnetic pole layer is formed at a flare angle greater than a flare angle of the auxiliary yoke layer.10-02-2008
20080316645PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING THE SAME - Provided is a perpendicular magnetic recording head and a method of manufacturing the same. The perpendicular magnetic recording head that includes a main pole, a return yoke, and a return yoke tip, wherein the main pole and the return yoke tip that faces the main pole with a gap therebetween have the same width in a cross-track direction, and the method comprises: (a) sequentially forming a first magnetic layer for forming the main pole, the non-magnetic layer for forming a gap between the main pole and the return yoke tip, and a second magnetic layer for forming the return yoke tip; (b) patterning the second magnetic layer so that the second magnetic layer contacts the non-magnetic layer as much as a predetermined throat height; (c) forming the main pole and the return yoke tip by trimming the second magnetic layer and the first magnetic layer in a shape having the same width in the cross-track direction; and (d) forming a return yoke on the second magnetic layer.12-25-2008
20100208388MAGNETIC HEAD, HEAD ASSEMBLY AND MAGNETIC RECORDING/REPRODUCING APPARATUS AND METHOD FOR MANUFACTURING MAGNETIC HEAD - The present invention relates to a magnetic head and particularly to improvement of its recording element. The recording element includes a first magnetic film, a second magnetic film, a coil film, and an insulating film. The first magnetic film has a first pole portion. The second magnetic film has a second pole portion opposed to the first pole portion with a magnetic gap film therebetween and is joined to the first magnetic film at a back gap portion that is located in a rearward position with respect to a medium facing surface. The coil film extends around the back gap portion, and the insulating film encloses the coil film. Moreover, the second magnetic film entirely covers the insulating film.08-19-2010
20120212855MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING HAVING A POLE LAYER INCLUDING A PLURALITY OF STACKED MAGNETIC FILMS - A magnetic head includes a pole layer accommodated in a groove. The pole layer has a track width defining portion and a wide portion. The pole layer includes a plurality of magnetic films stacked. At least one of the plurality of magnetic films includes a first portion included in the track width defining portion, a second portion included in the wide portion, and a third portion coupling the first and second portions to each other. In a cross section passing through the center of the pole layer taken in the track width direction, the second portion is smaller than the first portion in thickness and the top surface of the third portion is inclined with respect to a direction perpendicular to a medium facing surface.08-23-2012
20100254041PERPENDICULAR MAGNETIC RECORDING SYSTEM WITH HELICAL WRITE COIL AND AUXILIARY COIL FOR FAST SWITCHING OF WRITE POLE MAGNETIZATION - A perpendicular magnetic recording system has a write head having a main helical coil (the write coil) and main pole (the write pole) that directs write flux in a direction perpendicular to the recording layer in the magnetic recording medium, and an auxiliary coil and auxiliary pole that injects magnetic flux into the write pole at an angle to the primary or perpendicular axis of the write pole. The auxiliary coil is preferably a helical coil wrapped around the auxiliary pole. The additional flux from the auxiliary pole, which is injected non-parallel to the primary magnetization of the write pole, exerts a relatively large torque on the magnetization of the write pole, thereby facilitating magnetization reversal of the write pole. Electrical circuitry is connected to the main coil and the auxiliary coil to generate the auxiliary flux simultaneous with the switching of the magnetization of the write pole.10-07-2010
20110038080PERPENDICULAR MAGNETIC RECORDING WRITE HEAD WITH SPIN TORQUE OSCILLATOR FOR FAST SWITCHING OF WRITE POLE MAGNETIZATION - A perpendicular magnetic recording write head that a write pole, an electrically conductive coil coupled to the write pole for generating magnetic flux in the write pole in the presence of electrical write current, and a spin torque oscillator (STO) that injects auxiliary magnetic flux to the write pole in a direction generally orthogonal to the write pole to facilitate magnetization switching of the write pole. The STO comprises a stack of layers including electrodes, a pinned ferromagnetic layer having a fixed, a free ferromagnetic layer having a magnetization free to rotate, and a nonmagnetic spacer layer between the pinned and free layers. The free layer may be oriented either substantially orthogonal to the write pole or substantially parallel to the write pole, in which latter embodiment a flux guide may be located between the free layer and the write pole for directing the auxiliary magnetic flux from the free layer to the write pole.02-17-2011
20080225436PERPENDICULAR MAGNETIC RECORDING HEAD AND MANUFACTURING METHOD THEREOF - A perpendicular magnetic recording head includes a main magnetic pole layer exposed to an opposing surface opposite a recording medium, applying a perpendicular recording magnetic field to the recording medium; a return yoke layer disposed in the opposing surface opposite the recording medium above or below the main magnetic pole layer, the return yoke layer receiving the recording magnetic field returning thereto after passing through the recording medium; and a planarized nonmagnetic layer filling the surroundings of the return yoke layer to planarized the return yoke layer. Inclined or curved surfaces are formed at both sides in a track width direction of the return yoke layer, the inclined or curved surfaces gradually broadening the dimension of the return yoke layer in the track width direction as the inclined or curved surfaces extend from front end surfaces thereof exposed to the opposing surface opposite the recording medium in the height direction. A cohesive layer is disposed between the return yoke layer and the planarized nonmagnetic layer to increase the cohesive properties between the return yoke layer and the planarized nonmagnetic layer compared with the case in which the return yoke layer is directly connected to the planarized nonmagnetic layer.09-18-2008
360123030 Location 12
20130188281DEVICES INCLUDING SHAPED WRITE COILS - In certain embodiments, a head includes a write coil having multiple coil turns. A portion of the multiple coil turns are positioned near an air bearing surface and form a v- or u-shape.07-25-2013
20120147500MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING HAVING A TAPERED MAIN POLE - A bottom end of a main pole includes first, second, and third portions that are contiguously arranged in order of increasing distance from the medium facing surface. A top surface of the main pole includes fourth, fifth, and sixth portions that are contiguously arranged in order of increasing distance from the medium facing surface. A distance from the top surface of the substrate to any given point on each of the first and second portions decreases with increasing distance from the given point to the medium facing surface. The second portion has an angle of inclination greater than that of the first portion with respect to a direction perpendicular to the medium facing surface. A distance from the top surface of the substrate to any given point on each of the fourth and fifth portions increases with increasing distance from the given point to the medium facing surface. The fifth portion has an angle of inclination greater than that of the fourth portion with respect to the direction perpendicular to the medium facing surface.06-14-2012
20120134051Write Head Having Recessed Magnetic Material In Gap Region - As track densities increase, it becomes increasingly important, while writing in a given track, not to inadvertently write data in adjoining tracks. This problem has been overcome by limiting the width of material in the ABS plane to what it is at the write gap. The part of the lower pole that is wider than this is recessed back away from the ABS, thereby greatly reducing its magnetic influence on adjacent tracks. Four different embodiments of write heads that incorporate this notion are described together with a description of a general process for their manufacture.05-31-2012
20120134050Write Head Having Recessed Magnetic Material In Gap Region - As track densities increase, it becomes increasingly important, while writing in a given track, not to inadvertently write data in adjoining tracks. This problem has been overcome by limiting the width of material in the ABS plane to what it is at the write gap. The part of the lower pole that is wider than this is recessed back away from the ABS, thereby greatly reducing its magnetic influence on adjacent tracks. Four different embodiments of write heads that incorporate this notion are described together with a description of a general process for their manufacture.05-31-2012
360123040 On return pole 1
20130038966MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDINGHAVING A MAIN POLE, A SHIELD AND A COIL CORE PART SETBACK AWAY FROM THE MEDIUM FACING SURFACE A SPECIFIED DISTANCE - A magnetic head includes: a main pole; a coil; a first shield having an end face that is located in a medium facing surface at a position forward of an end face of the main pole along a direction of travel of a recording medium; and a first return path section disposed forward of the main pole along the direction of travel of the recording medium. The first return path section connects part of the main pole away from the medium facing surface to the first shield so that a first space is defined. The coil includes a first portion having a planar spiral shape and wound around a core part of the first return path section. The first portion includes first and second coil elements that each extend through the first space. No part of the coil other than the first and second coil elements exists in the first space.02-14-2013
360123050 On main/recording pole 7
20130027810METHOD OF FORMING METAL TO A CONCAVE PORTION OF A SUBSTRATE, METHOD OF MANUFACTURING A MAGNETIC HEAD AND A MAGNETIC HEAD - The present invention relates to a method of forming a metal in a concave portion of a substrate. The method includes a step of preparing a substrate having a concave portion; a step of applying a liquid coating member on the substrate and filling in and solidifying the concave portion with the coating member; a step of covering the coating member with a resist; a step of forming a penetrating hole that penetrates the resist in a position of the concave portion of the substrate; a step of removing the coating member within the concave portion; and a step of filling a metal into a portion where the coating member has been removed.01-31-2013
20080316646PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording head and a method of manufacturing the same are provided. The perpendicular magnetic recording head that includes a main pole, a return yoke, and coils that surround upper and lower parts of the main pole in a solenoid shape so that the main pole generates a magnetic field for recording information onto a recording medium, wherein a portion of the coils that pass above the main pole comprises a plurality of first coils and at least one second coil having a cross-sectional shape different from that of the first coils, and the second coil is formed across upper regions of two first coils adjacent to each other among the first coils.12-25-2008
20120314323MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDINGHAVING A MAIN POLE AND A SHIELD AND SPECIFICALLY STRUCTURED AND LOCATED COIL ELEMENTS AND MAGNETIC COUPLING LAYERS - A magnetic head includes a coil, a main pole, a gap part, a write shield, and a return path section. The return path section includes a yoke part and first and second coupling layers. The first coupling layer is connected to the write shield. The second coupling layer magnetically couples the first coupling layer to the yoke part, and has an end face facing toward a medium facing surface and located away from the medium facing surface. The coil includes a first coil element and a plurality of second coil elements that each extend to pass through a space defined by the main pole, the gap part, the write shield, and the return path section. The first coil element is disposed with the first coupling layer interposed between the medium facing surface and the first coil element. The second coil elements are disposed with the second coupling layer interposed between the medium facing surface and the second coil elements, and with the first coil element interposed between the main pole and the second coil elements. The second coil elements are aligned perpendicularly to the medium facing surface.12-13-2012
20100254042PERPENDICULAR MAGNETIC RECORDING SYSTEM WITH AUXILIARY COIL AND CIRCUITRY FOR FAST SWITCHING OF WRITE POLE MAGNETIZATION - A perpendicular magnetic recording system has a write head having a main coil (the write coil) and main pole (the write pole) that directs write flux in a direction perpendicular to the recording layer in the magnetic recording medium, and an auxiliary coil and auxiliary pole that injects magnetic flux into the write pole at an angle to the primary or perpendicular axis of the write pole. The additional flux from the auxiliary pole, which is injected non-parallel to the primary magnetization of the write pole, exerts a relatively large torque on the magnetization of the write pole, thereby facilitating magnetization reversal of the write pole. Electrical circuitry is connected to the main coil and the auxiliary coil to generate the auxiliary flux simultaneous with the switching of the magnetization of the write pole.10-07-2010
20120127610MAGNETIC RECORDING METHOD USING MICROWAVE ASSISTED HEAD - A magnetic recording method for a recording layer of a magnetic recording medium uses a thin film magnetic head with a sub-coil or a microwave radiator. In the method, a microwave spread spectrum (SS) signal is applied to the sub-coil or the microwave radiator, the microwave SS signal including a ferromagnetic resonant (FMR) frequency of the recording layer as a carrier wave within a band so as to generate an in-plane high-frequency magnetic field so that a magnetization reversal magnetic field Hsw of the recording layer is lowered. The magnetic recording is performed while the magnetization reversal magnetic field Hsw of the recording layer is lowered.05-24-2012
20120134052Write Head Having Recessed Magnetic Material In Gap Region - As track densities increase, it becomes increasingly important, while writing in a given track, not to inadvertently write data in adjoining tracks. This problem has been overcome by limiting the width of material in the ABS plane to what it is at the write gap. The part of the lower pole that is wider than this is recessed back away from the ABS, thereby greatly reducing its magnetic influence on adjacent tracks. Four different embodiments of write heads that incorporate this notion are described together with a description of a general process for their manufacture.05-31-2012
20120275061MAGNETIC RECORDING DEVICE - According to one embodiment, a magnetic recording device includes a magnetic recording head and a magnetic recording medium. The magnetic recording head includes a main magnetic pole, a shield and a stacked structure. The main magnetic pole has a medium facing surface and a main magnetic pole side surface. The shield has a shield side surface. The stacked structure is provided between the main magnetic pole and shield, and includes first and second magnetic layers, and an intermediate layer. The magnetic recording medium includes a backing layer and a magnetic recording layer. A distance between an end portion of the medium facing surface on a side of the stacked structure and the backing layer is twice or more of a distance between the main magnetic pole side surface and the shield side surface.11-01-2012
360123060 Configuration detail 1
20100188775BIASING STRUCTURE FOR WRITE ELEMENT DOMAIN CONTROL IN A MAGNETIC WRITER - A magnetic writer includes a write element having a first domain pattern when in a quiescent state and a second domain pattern when in an active state. A biasing structure is configured to induce the write element into the first domain pattern when the magnetic writer is in the quiescent state.07-29-2010
360123100 Electrical connection detail 1
20110109993PERPENDICULAR MAGNETIC RECORDING WRITE HEAD WITH ENHANCEMENT CAPACITOR ON SLIDER BODY FOR WRITE CURRENT OVERSHOOT AT WRITE CURRENT SWITCHING - Write enhancement circuitry on the head carrier of a magnetic recording disk drive provides additional write current overshoot beyond that provided by the write driver circuitry. An enhancement capacitor is formed with a dielectric layer between two layers of electrically-conductive magnetically-permeable shield material that serve as the capacitor plates. The write enhancement circuitry may also include an enhancement resistor. The enhancement capacitor and resistor are connected between the two terminals on the head carrier that connect to the write head coil. The capacitor and resistor are fabricated on the head carrier at the same time and in the same process as the read head. The first and second capacitor plates are generally coplanar with and formed of the same electrically-conductive magnetically-permeable material that forms the first and second magnetic shields for the read head. The enhancement resistor is a stack of layers that is coplanar with and formed of the same materials as the stack of layers that form the sensor portion of the read head between the two magnetic shields.05-12-2011
360123110 Plural separate coils 2
20110170216MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING - A magnetic layer for writing incorporates: a pole layer having an end face located in a medium facing surface; and an upper yoke layer. A first magnetic layer for flux concentration is connected to the pole layer at a location away from the medium facing surface, and passes a magnetic flux corresponding to a magnetic field generated by a first coil. A second magnetic layer for flux concentration is connected to the upper yoke layer at a location away from the medium facing surface, and passes a magnetic flux corresponding to a magnetic field generated by a second coil. A nonmagnetic layer is disposed between the pole layer and the upper yoke layer. The upper yoke layer is connected to the pole layer at a location closer to the medium facing surface than the nonmagnetic layer.07-14-2011
20120229932MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING - A magnetic layer for writing incorporates: a pole layer having an end face located in a medium facing surface and a lower yoke layer. A first magnetic layer for flux concentration is connected to the lower yoke layer at a location away from the medium facing surface, and passes a magnetic flux corresponding to a magnetic field generated by a first coil. A second magnetic layer for flux concentration is connected to the pole layer at a location away from the medium facing surface, and passes a magnetic flux corresponding to a magnetic field generated by a second coil. A nonmagnetic layer is disposed between the pole layer and the lower yoke layer. The lower yoke layer is connected to the pole layer at a location closer to the medium facing surface than the nonmagnetic layer.09-13-2012
360123120 Shielding/protection 39
20100149687Magnetic head that suppresses protrusion of medium facing surface caused by heat of coil - A magnetic head includes a coil, a pole layer, and a coil adjacent layer. The coil includes a winding portion having two side surfaces. The coil adjacent layer is adjacent to at least part of the whole of the two side surfaces of the winding portion. The coil adjacent layer is formed of a nonmagnetic material having a linear thermal expansion coefficient of 5×1006-17-2010
20090122445PERPENDICULAR MAGNETIC RECORDING WRITE HEAD WITH FLUX SHAPING LAYERS ON THE WRITE POLE AND MAGNETIC RECORDING SYSTEM INCORPORATING THE WRITE HEAD - A perpendicular magnetic recording write head has at least one flux shaping layer located on the write pole. The write pole has an end located substantially at the surface of the head carrier that faces the recording medium. The write head includes a main pole, on which the write pole is formed, that has an end recessed from the write pole end, and at least one flux return pole. In one implementation a first flux shaping layer is located between the main pole and the write pole and has an end recessed from the write pole end. A second flux shaping layer, also with its end recessed form the write pole end, may be located on the write pole. The second flux shaping layer may also cover the sides of the write pole in the cross-track direction so that together with the first flux shaping layer, the write pole is substantially surrounded by flux shaping material. The ends of the flux shaping layers may be tapered in the direction of the recording medium to enhance directing and shaping the flux to the write pole end.05-14-2009
20090154012Perpendicular magnetic recording head, magnetic head, and magnetic disk device mounted with these heads - Embodiments of the invention reduce generation of a magnetic field with a polarity reverse to that of the recording magnetic field, without deteriorating a gradient in the magnetic field. An embodiment of a magnetic disk device according to the present invention suppresses deviation and erase of already recorded data. In an embodiment, the perpendicular magnetic recording head includes the main magnetic pole, an auxiliary magnetic pole, a trailing shield disposed on the trailing side of the main magnetic pole with a non-magnetic film placed in-between, and side shields disposed on both the sides of the main magnetic pole in the direction of the track width with a non-magnetic film placed in-between. The trailing shield has on the trailing side a portion where film thickness is thinner on the trailing side than the thickness of its element in the height direction in its position facing the main magnetic pole. Adoption of this configuration allows suppression of generation of the magnetic field having a polarity reverse to that of the recording magnetic field, without deteriorating the magnetic field gradient. Also in the portion where the side shields face the main magnetic pole, the side shields have the portion where the film is thinned down in thickness.06-18-2009
20120218663MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING THAT INCLUDES A SENSOR FOR DETECTING CONTACT WITH A RECORDING MEDIUM - A magnetic head includes a main pole, a write shield, a return path section, a heater that generates heat for making part of a medium facing surface protrude, and a sensor that detects contact of the part of the medium facing surface with a recording medium. The return path section includes: a yoke layer located backward of the main pole along the direction of travel of the recording medium; a first coupling part coupling the yoke layer and the write shield to each other; and a second coupling part located away from the medium facing surface and coupling the yoke layer and the main pole to each other. The first coupling part has an end face facing toward the yoke layer. This end face includes a middle portion spaced from the yoke layer and facing the yoke layer, and two side portions located on opposite sides of the middle portion in a track width direction and in contact with the yoke layer. The sensor is located between the middle portion and the yoke layer.08-30-2012
20120218662MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING THAT INCLUDES A SENSOR FOR DETECTING CONTACT WITH A RECORDING MEDIUM - A magnetic head for perpendicular magnetic recording includes a read head unit, a write head unit disposed forward of the read head unit along the direction of travel of a recording medium, a heater that generates heat for causing the medium facing surface to protrude in part, an expansion layer that makes part of the medium facing surface protrude, and a sensor that detects contact of the part of the medium facing surface with the recording medium. The write head unit includes a main pole, a write shield, and a return path section. The return path section includes a yoke layer located backward of the main pole along the direction of travel of the recording medium, a first coupling part that couples the yoke layer and the write shield to each other, and a second coupling part that is located away from the medium facing surface and couples the yoke layer and the main pole to each other.08-30-2012
20110292545MAGNETIC HEAD AND MAGNETIC DISK DRIVE TO BE USED FOR SHINGLED RECORDING METHOD - In a magnetic head to be used for a shingled recording method, degradation of a signal resolution and a decrease in a signal-to-noise ratio which are caused by an asymmetrical inter-bit transition curvature are prevented, and a low bit error rate is realized. A magnetic head includes a recording head and a reproducing head. The reproducing head includes a pair of magnetic shields and a sensor sandwiched between the pair of magnetic shields. The gap between the magnetic shields is formed so that the longitudinal direction thereof gets inclined by a certain angle with respect to a cross-track direction in line with the shape of a curvature of an inter-bit transition on an effective record track in a record pattern recorded on a recording medium.12-01-2011
20100296193PERPENDICULAR MAGNETIC RECORDING WRITE HEAD WITH NOTCHED TRAILING SHIELD - A perpendicular magnetic recording write head has a write pole, a trapezoidal-shaped trailing shield notch, and a gap between the write pole and notch, with the gap being formed of a nonmagnetic mask film, such as alumina, a nonmagnetic metal protective film and a nonmagnetic gap layer. The write pole has a trailing edge that has a width substantially defining the track width and that faces the front edge of the notch but is spaced from it by the gap. The write pole has nonmagnetic filler material, such as alumina, surrounding it except at its trailing edge, where it is in contact with the gap. A reactive ion beam etching (RIBE) process removes the filler material at the side edges of the write pole and thus widens the opening at the side edges. The nonmagnetic metal film protects the underlying mask film and write pole during the widening of the opening. The gap layer and trailing shield notch are deposited into a widened opening above the write pole, so the sides of the notch diverge to cause the generally trapezoidal shape.11-25-2010
20100110585Perpendicular magnetic recording write head with a trailing shield - Insertion of a two part trailing shield between the write gap and the upper return pole of a magnetic write head reduces the sensitivity of the latter to increases in the current driving the field coils (beyond the required minimum). A key feature is careful control of the distance between the upper component of the write shield and the main pole. A process for manufacturing the structure is outlined.05-06-2010
20110222188PERPENDICULAR RECORDING MAGNETIC HEAD, MANUFACTURING METHOD THEREOF AND MAGNETIC DISK DRIVE - The reduction in a recording magnetic field due to the narrowing of recording track width along with the improved surface recording density is prevented and the increasing of accuracy in the track width is achieved, enabling an improvement in recording performance. In a perpendicular magnetic recording head, a main pole 09-15-2011
20120106001SHIELD WITH WINE GLASS SHAPED CAVITY - A write element for magnetic recording includes a main pole and a shield. The main pole has first and second sides with respect to a down-track direction. The shield at least partially surrounds the main pole with a continuously concave inner sidewall. The angle between the inner sidewall of the shield and the direction of motion of the write element is greater than the angle between the sides of the main pole and the direction of motion.05-03-2012
20090116143THIN-FILM MAGNETIC HEAD, HEAD GIMBAL ASSEMBLY, AND HARD DISK SYSTEM - A write shield layer that forms a part of a thin-film magnetic head is set with respect to the widthwise full length W thereof lying substantially on an air bearing surface that is opposite to the recording medium such that when the full length W is trisected, the maximum thickness H05-07-2009
20110128652MAGNETIC HEAD AND DISK DRIVE WITH THE SAME - According to one embodiment, a magnetic head includes a main pole configured to produce a recording magnetic field, a return pole opposed to a trailing side of the main pole across a write gap and configured to return magnetic flux from the main pole, a coil configured to excite the main pole, a spin-torque oscillator between the main pole and a surface of the return pole, configured to produce a high-frequency magnetic field, and side shields individually on opposite sides of the main pole transversely relative to a track, magnetically separated from the main pole, and located at a height position above the recording medium higher than that of the spin-torque oscillator.06-02-2011
20120314324Non-uniform write gap perpendicular writer for shingle writing - A PMR writer is disclosed that includes at least one of a recessed center section in the write pole trailing edge and a center recessed trailing shield to improve the field gradient at track edge. In all embodiments, there is a non-uniform write gap between the trailing edge and the trailing shield. The recessed portion of the write pole trailing edge and/or center recess of the trailing shield has a thickness from 10 to 40 nm in a down-track direction and a width in a cross-track direction of 20 to 200 nm. The distance between the center recess and a corner of the trailing edge is from 20 to 80 nm. A sequence of steps is provided to fabricate the two embodiments of the present invention.12-13-2012
20100157472MAGNETIC WRITE HEAD HAVING A SELF-ALIGNED SIDE WRAP-AROUND SHIELD WITH MULTI-ANGLE SLANTED BUMP - A method for forming a magnetic write head having a trailing shield with a tapered and stepped, self aligned trailing magnetic shield. The shield has a tapered portion that tapers away from the write pole as it extends away from the ABS. This tapered portion helps to channel flux to the pole tip portion of the shield, while preventing the loss of write field to the shield. The stepped portion of the shield further helps to prevent the loss of write field and also defines a secondary throat height of the shield that can be accurately located relative to the air bearing surface.06-24-2010
20110075294MAGNETIC HEAD AND DISK DRIVE WITH THE SAME - According to one embodiment, a magnetic head for perpendicular recording includes a slider includes a facing surface, and a head section on the slider. The head section includes a main pole, a recording coil configured to excite the main pole, a write/shield pole opposed to a trailing side of the main pole across a write gap, and side shields disposed individually on opposite sides of the main pole transversely relative to a track to face side faces of the main pole and magnetically separated from the main pole. That part of a side face of each of the side shields opposed to each corresponding side face of the main pole which is located at the shortest distance from a leading end of each of the side faces of the main pole, on the facing surface, includes a permeability lower than that of the other part of the side shield.03-31-2011
20120147501MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING WITH SHIELD AROUND MAIN POLE - A magnetic head includes a shield, and first and second return path sections. The shield has an end face that is located in a medium facing surface to wrap around an end face of a main pole. The shield includes a bottom shield, two side shields, and a top shield. The first return path section includes a yoke layer, and first and second coupling layers that magnetically couple the bottom shield and the yoke layer to each other. The first coupling layer is magnetically connected to the bottom shield. The second coupling layer magnetically couples the first coupling layer to the yoke layer. No end faces of the second coupling layer are exposed in the medium facing surface. The second return path section magnetically couples the top shield and the main pole to each other.06-14-2012
20110134568PMR WRITER AND METHOD OF FABRICATION - Methods for fabrication of tapered magnetic poles with a non-magnetic front bump layer. A magnetic pole may have a tapered surface at or near an air bearing surface (ABS), wherein a thickness of the write pole increases in a direction away from the ABS. A non-magnetic front bump layer may be formed on the tapered surface of the magnetic pole and away from the ABS. The front bump layer may increase the separation distance between a shield layer and the magnetic pole near the tapered surface, thereby improving the performance of the write head.06-09-2011
20110134569PMR WRITER AND METHOD OF FABRICATION - Methods for fabrication of tapered magnetic poles with a non-magnetic front bump layer. A magnetic pole may have a plurality of tapered surfaces at or near and air bearing surface (ABS), wherein a thickness of the write pole increases in a direction away from the ABS. A non-magnetic front bump layer may be formed on one or more of the tapered surfaces of the magnetic pole at a distance from the ABS. The front bump layer may increase the separation distance between a shield layer and the magnetic pole near the tapered surface, thereby improving the performance of the write head.06-09-2011
20110134567PERPENDICULAR MAGNETIC WRITE HEAD WITH WRAP-AROUND SHIELD, SLANTED POLE AND SLANTED POLE BUMP FABRICATED BY DAMASCENE PROCESS - A magnetic write head having a write pole with a tapered trailing edge. The write head has a non-magnetic step layer and a non-magnetic bump formed on the front edge of the magnetic step layer. A non-magnetic trailing gap layer is formed over the tapered trailing edge of the write pole and over the non-magnetic bump and over the non-magnetic step layer. A magnetic trailing shield is formed over at least a portion of the non-magnetic gap layer.06-09-2011
20100027162Method to reduce sensitivity of a perpendicular recording head to external fields - In a read-write head, the shields can serve as magnetic flux conductors for external fields, so that they direct a certain amount of flux into the recording medium. This problem has been overcome by the addition to the shields of a pair of tabs located at the edges closest to the ABS. These tabs serve to prevent flux concentrating at the edges so that horizontal fields at these edges are significantly reduced. Said tabs need to have aspect ratios of at least 2 and may be either triangular or rectangular in shape. Alternatively, the tabs may be omitted and, instead, outer portions of the shield's lower edge may be shaped so as to slope upwards away from the ABS.02-04-2010
20110216443PERPENDICULAR MAGNETIC WRITE HEAD AND MAGNETIC RECORDING DEVICE - A perpendicular magnetic write head is provided with a magnetic pole and a pair of side shields disposed on both sides of the magnetic pole in a cross track direction with side gaps in between. Each of the pair of side shields is configured in such a manner that a saturation magnetic flux density thereof increases as a distance from the magnetic pole in the cross track direction increases. Such a configuration allows unwanted divergence component of magnetic flux in a recording magnetic field to be captured while avoiding any excessive capturing of the recording magnetic field, and while preventing any intensity reduction of the recording magnetic field in its entirety. As a result, the recording magnetic field is maintained to have an adequate intensity and spreading of the recording magnetic field is suppressed, so that the recording capabilities are improved.09-08-2011
20110051285Method to reduce sensitivity of a magnetic read-write head to external magnetic fields - In a read-write head, the shields can serve as magnetic flux conductors for external fields, so that they direct a certain amount of flux into the recording medium. This problem has been overcome by the addition to the shields of a pair of tabs located at the edges closest to the ABS. These tabs serve to prevent flux concentrating at the edges so that horizontal fields at these edges are significantly reduced. Said tabs need to have aspect ratios of at least 2 and may be either triangular or rectangular in shape. Alternatively, the tabs may be omitted and, instead, outer portions of the shield's lower edge may be shaped so as to slope upwards away from the ABS.03-03-2011
20110063755PMR write with flux choking area - A PMR writer having a trailing shield structure is disclosed in which a flux choking layer (FCL) formed adjacent to the ABS provides a means to limit the amount of flux flowing from the trailing shield to a first write shield (WS03-17-2011
20120044598Writer shields with modified shapes for reduced flux shunting - A perpendicular magnetic recording (PMR) head is fabricated with a configuration of leading edge shields and trailing edge shields that reduce the leakage of flux between the main pole and the shields. The reduction of leakage is achieved by eliminating the sharp 90° corner between the backside surfaces of the shields and the surfaces adjacent to the main pole. In one embodiment the corner is replaced by two successive acute angles, in another embodiment it is replaced by a rounded surface. In a final embodiment, leakage between the pole and trailing edge shield is achieved by shortening the length of the write gap by forming the shield with a double taper.02-23-2012
20120002326Perpendicular Magnetic Write head and method of manufacturing the same - A perpendicular magnetic write head includes: a magnetic pole; a pair of nonmagnetic side gap layers provided on both sides in a track-width direction of the magnetic pole; a nonmagnetic trailing gap layer provided on a trailing side of the magnetic pole; a magnetic shield layer so provided as to surround the magnetic pole with both of the nonmagnetic side gap layer and the nonmagnetic trailing gap layer in between; and a magnetic seed layer formed between the nonmagnetic trailing gap layer and the magnetic shield layer, and having a saturation magnetic flux density higher than that of the magnetic shield layer. The magnetic seed layer is not formed between the nonmagnetic side gap layer and the magnetic shield layer.01-05-2012
20110085265MAGNETICALLY SHIELDED WRITE TRANSDUCERS - A magnetic head according to one embodiment includes at least two write transducers for writing to a magnetic medium; and a shield structure having at least two magnetically connected shields which at least partially cover two opposite sides of the writer. A magnetic head according to another embodiment includes at least two write transducers for writing to a magnetic medium, the at least two write transducers being positioned adjacent each other and aligned along a line; and a shield structure having shields adjacent at least three sides of each of the at least two write transducers, the shields being formed of a magnetically permeable material. Additional devices, systems, and methods are also presented.04-14-2011
20110102941Optimized write pole flare angle for side shield or semi side shiel PMR writer application - Improved writability and a reduction in adjacent track erasure are achieved in a PMR writer with a large flare angle of 45 and 90 degrees in the main write pole and a full side shield or partial side shield configuration around the narrow write pole section and write pole tip. A trailing shield is formed above the write pole's top surface and a full or partial side shield section is spaced a certain distance from each side of the write pole. The partial side shield has a thickness less than that of the write pole and a top or bottom surface about coplanar with the pole tip's top or bottom edge, respectively. The partial side shield may include two sections on each side of the write pole wherein the bottom surface of a top section is separated by a certain distance from the top surface of a bottom section.05-05-2011
20120127612PROCESS TO MAKE PMR WRITER WITH LEADING EDGE SHIELD (LES) AND LEADING EDGE TAPER (LET) - Methods for fabrication of leading edge shields and tapered magnetic poles with a tapered leading edge are provided. The leading edge shield may be formed by utilizing a CMP stop layer. The CMP stop layer may aid in preventing over polishing of the magnetic material. For the tapered magnetic poles with a tapered leading edge, a magnetic material is deposited on a planarized surface, a patterned resist material is formed, and exposed magnetic material is etched to form at least one tapered surface of the magnetic material.05-24-2012
20120127611Modified shield design to eliminate the far-field WATE problem - A shield design for a magnetic write head is described that eliminates the far-field WATE problem while still maintaining side shielding ability. This is achieved by moving all but the central sections of the three shields (LS, SS, and WS) and, optionally, the top yoke a short distance further away from the recording medium than the ABS.05-24-2012
20120188666MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING HAVING A MAIN POLE AND A SHIELD - A magnetic head includes: a main pole; a coil; a first shield with an end face located in a medium facing surface at a position forward of an end face of the main pole along a direction of travel of a recording medium; a gap part including a portion located between the main pole and the first shield; and a first return path section disposed forward of the main pole along the direction of travel of the recording medium. The first return path section connects the first shield and the main pole to each other so that a first space is defined by the main pole, the gap part, the first shield, and the first return path section. The coil includes a plurality of first coil elements extending to pass through the first space and aligned in a row in the direction of travel of the recording medium.07-26-2012
20120257304MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING HAVING A MAIN POLE AND A SHIELD - A magnetic head includes a coil, a main pole, a write shield, and first and second yoke layers. The first and second yoke layers are magnetically connected to the write shield and aligned along the direction of travel of a recording medium such that the main pole is interposed therebetween. The coil includes a winding portion of planar spiral shape that is formed in one or more layers. The magnetic head further includes: a first coupling part located away from the medium facing surface and magnetically coupling the main pole and the second yoke layer to each other; and a second coupling part located away from the medium facing surface and magnetically coupling the first yoke layer and the second yoke layer to each other without touching the main pole. The winding portion is wound around the first coupling part, and a part of the winding portion passes between the first and second coupling parts.10-11-2012
20100328816Composite shield structure of PMR writer for high track density - Improved writability and a substantial reduction in adjacent track erasure are achieved by incorporating a composite shield structure in a PMR writer. There is a trailing shield formed a certain distance above the top surface of a write pole, a leading shield formed a certain distance below the bottom surface of the write pole, and a partial side shield having a side shield section formed on each side of the write pole. The partial side shield thickness is less than that of the write pole. Each partial side shield section has a side that is parallel to the nearest write pole side and a top surface that is offset from the write pole top surface by 0 to 0.15 microns. A plurality of magnetic connections between two or more shield elements is employed to ensure correct magnetic potential. The large write pole has a flare angle of 45 to 75 degrees.12-30-2010
20130016443ASYMMETRIC WRITER FOR SHINGLED MAGNETIC RECORDING - In one embodiment, a system includes a writer for shingled recording which includes a write pole having a trailing edge and first and second side edges extending from the trailing edge. The writer further includes a shield extending along and about parallel to at least an entire length of the trailing edge, the shield also extending along at least a portion of the first side edge. Other systems are also presented which include advanced shingled writing head designs.01-17-2013
20130016442MAGNETIC RECORDING HEAD WITH NOTCHED SHIELD - A magnetic recording head includes a magnetic recording write element including a main pole having a leading edge and an opposing trailing edge and a first side surface and a second side surface separating the leading edge from the trailing edge. A first side shield gap separates a first side shield from the first side of the main pole and a second side shield gap separates the second side shield from the second side of the main pole. A front magnetic shield is separated from the main pole trailing edge by a front shield gap. A recess extends into the front shield adjacent to the trailing edge, and parallel to the trailing edge. The recess extends laterally away from the main pole and into the front shield a distance greater than the first side shield gap or second side shield gap.01-17-2013
20100232062MAGNETIC RECORDING HEAD WITH MAGNETIC WALL ANGLE - A pole tip shield for a write element of a recording head is disclosed. The pole tip shield is spaced from the pole tip in the leading edge direction to provide a magnetic wall angle to reduce ATI or adjacent track erasure to compensate for the skew angle of the head. In illustrated embodiments, the pole tip shield includes side portions. In illustrated embodiments the pole tip shield is generally “U” shaped and side portions of the pole tip shield include different thickness or width dimensions. In illustrated embodiments, the pole tip shield provides a magnetic wall angle for a rectangular shaped pole tip. Embodiments disclosed in the application include a trailing edge shield separated from the pole tip shield along an air bearing surface of the head by a non-magnetic gap portion.09-16-2010
20110273798PMR writer with pi shaped shield - A perpendicular magnetic recording (PMR) head is fabricated with a pole tip shielded laterally by a pair of symmetrically separated side shields that extend from an edge of a trailing edge shield to form a shield with the shape of a π. The easy axis direction of the side shields is in the in-track direction. As a result, the side shields effectively shield the fringing fields of the magnetic pole tip from causing adjacent track erasures, while not adding their own fringing fields that could cause erasures even beyond adjacent tracks.11-10-2011
20100309581Insertion under read shield for improved read gap actuation in dynamic flying height - A read/write head is disclosed wherein a non-magnetic layer made of a metal is inserted in the read head on a side opposite to the S1 shield with respect to the sensor. The non-magnetic layer is preferably Cu and is recessed from the ABS to prevent corrosion. A preferred design has a 1 to 5 micron thick non-magnetic insertion layer that extends a distance of 3 to 100 microns along a plane that is perpendicular to the ABS. RG efficiency is enhanced significantly and RG gamma ratio is improved to 1.0 so that a smaller difference in RG, WG, and min-fly point can be achieved at touchdown detection and in normal read/write operations. These results lead to an optimal dynamic performance for a given spacing target and enhanced read gap protrusion at a given heater power. S1/S2A thickness can be independently optimized for magnetic performance consideration only.12-09-2010
20110310510PERPENDICULAR MAGNETIC WRITE HEAD AND MAGNETIC RECORDING DEVICE - A main magnetic-pole layer is provided with, at the tip end portion thereof, a trailing shied on the trailing side via a non-magnetic gap layer, and the non-magnetic gap layer includes therein one or more magnetic layers. This magnetic layer appropriately controls the amount of magnetic fluxes coming from the tip end portion of the main magnetic-pole layer for capturing into the trailing shield because the magnetic fluxes coming from the tip end portion of the main magnetic-pole layer go through the magnetic layer before being captured into the trailing shield.12-22-2011
20120075749Magnetic write head with thin and thick portions for balancing writability and ate - A perpendicular magnetic recording (PMR) head is fabricated with a tapered main pole having a variable thickness. The tapered portion of the pole is at the ABS tip and it can be formed by bevels at the leading or trailing edges or both. The taper terminates to form a region with a maximum thickness, t03-29-2012
360123130 For longitudinal recording head 4
360123180 Single plane coil 4
360123370 Shielding/protection 4
20120069472CURRENT-PERPENDICULAR-TO-PLANE (CPP) READ SENSOR WITH FERROMAGNETIC BUFFER AND SEED LAYERS - A current-perpendicular-to-plane (CPP) tunneling magnetoresistance (TMR) or giant magnetoresistance (GMR) read sensor with ferromagnetic buffer and seed layers is proposed for high-resolution magnetic recording. The ferromagnetic buffer layer is preferably formed of an amorphous Co—X (where X is Hf, Y, Zr, etc.) film. It provides the CPP read sensor with microstructural discontinuity from a ferromagnetic lower shield, thus facilitating the CPP read sensor to grow freely with preferred crystalline textures, and with ferromagnetic continuity to the ferromagnetic lower shield, thus acting as a portion of the ferromagnetic lower shield. The ferromagnetic seed layer is preferably formed of a polycrystalline Ni—X (where X is Pt, Pd, Rh, Ru, etc.) film. It exhibits a face-centered-cubic (fcc) structure and does not exchange-couple with the antiferromagnetic pinning layer. It provides the CPP read sensor with microstructural continuity, thus facilitating the CPP read sensor to grow with preferred crystalline textures and exhibiting good magnetic and TMR properties, and with ferromagnetic continuity to the ferromagnetic lower shield, thus also acting as another portion of the ferromagnetic lower shield and defining the lower bound of a read gap with its upper surface.03-22-2012
20120069471CURRENT-PERPENDICULAR-TO-PLANE (CPP) READ SENSOR WITH FERROMAGNETIC BUFFER, SHIELDING AND SEED LAYERS - A current-perpendicular-to-plane (CPP) tunneling magnetoresistance (TMR) or giant magnetoresistance (GMR) read sensor with ferromagnetic buffer, shielding and seed layers is proposed for high-resolution magnetic recording. The ferromagnetic buffer layer is preferably formed of an amorphous Co—X (where X is Hf, Y, Zr, etc.) film. It provides the CPP read sensor with microstructural discontinuity from a ferromagnetic lower shield, thus facilitating the CPP read sensor to grow freely with preferred crystalline textures, and with ferromagnetic continuity to the ferromagnetic lower shield, thus acting as a portion of the ferromagnetic lower shield. The ferromagnetic shielding layer is preferably formed of a polycrystalline Ni—Fe film. It exhibits magnetic properties exactly identical to those of the ferromagnetic lower shield, thus acting identically as the ferromagnetic lower shield, and a uniform columnar grain morphology, thus initiating a uniform large grain morphology in the CPP read sensor.03-22-2012
20110075295SLANTED BUMP DESIGN FOR MAGNETIC SHIELDS IN PERPENDICULAR WRITE HEADS AND METHOD OF MAKING SAME - Embodiments provide a slanted bump magnetic shield in a perpendicular write head and a method of making the shield. The slanted bump magnetic shield provides a small throat height to maximize magnetic flux for writing to a magnetic media such as a magnetic storage disk in a hard disk drive, while avoiding saturation. An etch process is used to form a taper in non-magnetic gap material. The magnetic shield is then deposited on the taper, forming the slanted bump of the shield. The etch process may be a multiple etch process to provide better edge and thickness control when forming the taper.03-31-2011
20110310511APPARATUS INCLUDING MODIFIED WRITE POLE TIP - An apparatus that includes a write element including a write element tip having a leading edge, a trailing edge, and first and second side edges connecting the leading edge to the trailing edge, wherein the trailing edge is non-planar; a trailing shield proximate the trailing edge of the write element; a first side shield proximate the first side edge; and a second edge proximate the second side edge.12-22-2011

Patent applications in class Coil

Patent applications in all subclasses Coil