Abstract: A recording head includes a bearing surface, a first writer and a first shield structure for the first writer. The recording head also includes a second writer and a second shield structure for the second writer. The recording head further includes a magnetic bridge connecting the first shield structure to the second shield structure at the bearing surface.

Abstract: According to one embodiment, a magnetic recording head includes a main magnetic pole which applies a recording magnetic field to a magnetic recording medium, an auxiliary magnetic pole which faces the main magnetic pole across a recording gap, a first magnetic bypass layer which is provided in a recording gap in a track direction, and a second magnetic bypass layer which is provided in the recording gap in the track direction and is arranged at a distance from the first magnetic bypass layer in a track width direction.

Abstract: A microwave assisted magnetic head is equipped with a main magnetic pole that generates a recording magnetic field to be applied to a magnetic recording medium from an end surface forming a portion of an air bearing surface opposed to the magnetic recording medium, a trailing shield that is disposed interposing a write gap at a trailing side of the main magnetic pole, and that forms a magnetic path with the main magnetic pole, two side shields that are disposed at both sides of the main magnetic pole in the cross track direction, respectively, and a spin torque oscillator that is disposed within the write gap. The write gap is configured to substantially linearly extend along the cross track direction when viewed from an air bearing surface side, and is positioned between trailing-side end surfaces of the main magnetic pole and the two side shields, and a leading-side end surface of the trailing shield.

Abstract: According to one embodiment, a magnetic recording head includes an air-bearing surface, a main magnetic pole, a write shield opposed to the main magnetic pole with a write gap therebetween, a high-frequency oscillator which includes a spin injection layer and a oscillation layer and is provided between the main magnetic pole and the write shield, the oscillation layer and the spin injection layer including a stack surface extending in a direction intersecting with the air-bearing surface, and a magnetic material layer which is provided in at least one of the main magnetic pole and the write shield, faces the high-frequency oscillator, and has negative magnetic anisotropy with respect to a direction intersecting with the stack surfaces of the high-frequency oscillator.

Abstract: A perpendicular magnetic recording writer is disclosed with a side shield separated from a write pole side by a gap layer at an air bearing surface (ABS) where the side shield has a first sidewall facing the write pole with an end at height (h1) from the ABS, and a second sidewall at height h1 that is parallel to the ABS. The write pole side is curved such that a first portion proximate to the ABS is at an angle of 0 to 40 degrees with respect to a center plane formed orthogonal to the ABS, and a second section proximate to a corner where the curved side connects with a flared main pole side is formed substantially parallel to the second sidewall. When h1 is 30-80 nm, and the corner is 80-150 nm from the ABS, overwrite is improved while cross-track field gradient is enhanced.

Abstract: According to one embodiment, a magnetic recording head records information in a magnetic recording medium by shingled magnetic recording. The magnetic recording head includes a magnetic pole and a shield opposing the magnetic pole. The magnetic pole has a shield-opposing surface opposing the shield. The shield-opposing surface includes a first portion and a second portion. A position of the second portion in a track width direction is different from a position of the first portion in the track width direction, the track width direction intersecting a first direction from the magnetic pole toward the shield. The first portion records the information in the magnetic recording medium after the second portion in the shingled magnetic recording. A first distance between the first portion and the shield is shorter than a second distance between the second portion and the shield. The shield-opposing surface is tilted with respect to the first direction.

Abstract: A method and system provide a magnetic transducer. The transducer includes a main pole, a side gap, at least one coil and at least one of a leading shield, a trailing shield and side shield(s). A portion of the main pole resides at the ABS. The coil(s) are configured to energize the main pole. The side gap is being between the main pole and the at least one side shield. At least one of the leading shield, the side shield(s) and the trailing shield has a gradient in a saturation magnetization (Bs) such that the saturation magnetization increases in a yoke direction perpendicular to the ABS.

Abstract: A PMR writer is disclosed that includes 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.

Abstract: To uniformly determine the positional relationship between a main magnetic pole and a spin torque oscillator while independently optimizing the main magnetic pole and the spin torque oscillator. On a trailing end surface of a main magnetic pole, a step is provided at the boundary between the main magnetic pole and a gap material disposed on both sides thereof, and a spin torque oscillator is formed on the step. The spin torque oscillator is effectively separated into two regions by utilizing the step. Further, a part of the spin torque oscillator is removed so as to disable the unwanted region, thereby realizing a self-alignment type high frequency magnetic field assisted magnetic recording head structure such that the positions of the end portions of the main magnetic pole and the spin torque oscillator are aligned.

Abstract: A structure and a process for a perpendicular write pole that provides increased magnetic flux at the ABS is disclosed. This is accomplished by increasing the amount of write flux that originates above the write gap, without changing the pole taper at the ABS. Three embodiment of the invention are discussed.

Abstract: In one embodiment, a perpendicular magnetic recording head includes a main magnetic pole; a leading shield below a leading side of the main magnetic pole; a leading gap between the leading shield and the main magnetic pole; a trailing shield above a trailing side of the main magnetic pole; a trailing gap between the trailing shield and the main magnetic pole; and a nonmagnetic leading bump between the main magnetic pole and the leading shield. Additional embodiments are also disclosed.

Abstract: According to one embodiment, a magnetic recording head includes a main pole, a write shield facing the main pole with a write gap interposed therebetween, a recording coil, and a high-frequency oscillator including an oscillation layer provided within the write gap between an end portion of the main pole and the write shield, and an intermediate layer and a spin-injection layer stacked on the oscillation layer. The oscillation layer, the intermediate layer and the spin-injection layer are stacked in a direction intersecting the gap length direction of the write gap, and at least one of the oscillation layer and the spin-injection layer is electrically connected to one of the main pole and the write shield.

Abstract: The present application relates to a write gap structure for a magnetic recording head. In illustrated embodiments, the write gap structure includes multiple write gap segments along a beveled pole tip surface between a top edge and a bottom edge of the beveled pole tip surface to provide a narrow write gap proximate to the air bearing surface and a larger write gap behind the air bearing surface. In illustrated embodiments, the narrow write gap segment is formed between the beveled pole tip surface and a lower back surface of front shield and the larger write gap is formed between the beveled pole tip surface and an upper back surface of the front shield.

Abstract: 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.

Abstract: A magnetic recording transducer for use in a data storage device includes a writer pole with a ABS surface, trailing edge bevel and a trailing shield. The effective throat height of the writer main pole is reduced by the use two gap layers between the writer main pole and the trailing shield. A first gap layer is on and in contact with the writer pole trailing surface, and a second gap layer is on a section of the first gap layer on the writer pole trailing edge bevel, from a point removed from the ABS surface and absent from a part on a section of the first gap layer on the writer pole trailing edge bevel nearest the ABS. A method of fabricating the transducer is also provided.

Abstract: A magnetic write head having a write pole and a trailing, wrap-around magnetic shield formed over the write pole and separated from the write pole by a non-magnetic trailing gap layer and non-magnetic side gap layers. The write head includes a remnant magnetic seed layer, that while being used to facilitate electroplating of the magnetic shield, is left intentionally extending beyond the back edge of the magnetic shield. This extended portion of the magnetic seed layer acts as a shunt for magnetic flux and prevents data erasure due to over-writing.

Abstract: Excellent magnetization switching of a magnetic recording medium is promoted in microwave assisted magnetic recording to provide a highly-reliable high-density information recording device. A receded section from an air bearing surface is arranged at an end section in a write track width direction on an FGL laminate film for generating a high-frequency field. Alternatively, a cross section of the FGL laminate film (plane perpendicular to the direction of the flow of the electric current) has an inverted trapezoid shape or has a structure in which the area of the cross section increases with distance from the main pole. Since an excellent recording pattern is formed on the recording medium, areal recording density in the information recording device can be increased, and the reliability can be improved at the same time. As a result, the cost can be reduced.

Abstract: Embodiments provide a slanted bump magnetic shield in a perpendicular write head. 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.

Abstract: 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.

Abstract: A magnetic data storage system according to one embodiment includes a magnetic head adapted to record data according to a shingled magnetic recording (SMR) process. The magnetic head includes a main pole adapted to produce a writing magnetic field, a trailing shield positioned above a trailing side of the main pole, wherein a trailing gap is defined between the trailing shield and the main pole, and a spin torque oscillator (STO) positioned above a first trailing corner of the main pole at an STO-side of the main pole, wherein the trailing gap has a greater length in a film thickness direction near the STO-side of the main pole and a lesser length in the film thickness direction near a second trailing corner of the main pole opposite the first trailing corner in a track width direction of the main pole.

Abstract: A method according to one embodiment includes etching an underlayer positioned under a main pole for reducing a thickness thereof and creating an undercut under the main pole; adding a gap material along sides of the main pole and in the undercut; and forming a shield along at least a portion of the gap material. A magnetic head according to one embodiment includes a main pole; an underlayer positioned under the main pole and spaced therefrom, thereby defining an undercut therebetween; a first layer of gap material extending along sides of the main pole and in the undercut; a second layer of gap material extending continuously along the underlayer under the main pole; and a shield encircling the main pole, wherein the shield extends between the first and second layers of gap material in the undercut. Additional systems and methods are also presented.

Abstract: A magnetic write head having a gap structure that improves write head performance. The write head includes a magnetic write pole and a magnetic shield that is separated from the trailing edge of the write pole by a non-magnetic trailing gap layer and is separated from the sides of the write pole by non-magnetic side gap layers. The trailing gap extends laterally beyond the side gap layers, and a convex bump is formed at an edge of the magnetic shield at a location near the trailing end of each of the side gap layers.

Abstract: A structure and a process for a perpendicular write pole that provides increased magnetic flux at the ABS is disclosed. This is accomplished by increasing the amount of write flux that originates above the write gap, without changing the pole taper at the ABS. Three embodiment of the invention are discussed.

Abstract: A perpendicular magnetic recording (PMR) head is fabricated with a pole tip shielded laterally by a graded side shield that is conformal to the shape of the pole tip at an upper portion of the shield but not conformal to the pole tip at a lower portion. The shield includes a trailing shield, that is conformal to the trailing edge of the pole tip and may include a leading edge shield that magnetically connects two bottom ends of the graded side shield.

Abstract: A perpendicular magnetic write head includes: a magnetic pole having an end face on an air bearing surface; and side shield layers each having an end face on the air bearing surface, and arranged on both sides, in a write track width direction, of the magnetic pole with a side gap in between. The end face of the magnetic pole has a geometry in which a width at a trailing edge is larger than a width at a leading edge. Relationship D1<D2, D1<D3, and D3?D2 are satisfied in the air bearing surface, where D1 is a gap length of the side gap at the trailing edge, D2 is a gap length of the side gap at the leading edge, and D3 is a gap length of the side gap at any position between the trailing edge and the leading edge.

Abstract: 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.

Abstract: In one embodiment, a magnetic head includes a main pole, a trailing shield positioned near a trailing side of the main pole, a side shield positioned near both sides of the main pole in a cross-track direction, a leading shield positioned near a leading side of the main pole, and a gap positioned between the main pole and the shields, characterized in that Sg1<Sg2, wherein Sg1 is a distance in the cross-track direction between a bending point of a leading edge of the trailing shield and a trailing corner of the main pole nearest to the bending point, and Sg2 is a distance in the cross-track direction between a first point on an edge of the side shield parallel in the cross-track direction to the trailing corner of the main pole and the trailing corner of the main pole nearest to the first point.

Abstract: A magnetic writer comprises a write pole and a trailing shield. The write pole is proximate an air bearing surface. The trailing shield is separated from the write pole by a first write gap. The trailing shield is configured with a magnetic layer disposed between the first write gap and a second write gap.

Abstract: 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.

Abstract: A magnetic write head having write pole and a wrap-around-trailing magnetic shield having side portions that are separated from the write pole by tapered non-magnetic side gap layers. The tapered non-magnetic side gap layers provide a non-magnetic side gap width that increases with increasing distance from the ABS, thereby providing optimal protection against adjacent track interference at the ABS while minimizing write field loss to the shield in regions away from the ABS.

Abstract: 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.

Abstract: Embodiments in accordance with the present invention provide a magnetic head having a narrow track width and excellent in productivity for the purpose of realizing a disk storage unit having a large capacity. In a magnetic head having a plurality of flairs on a main magnetic pole, a side shield is formed via a non-magnetic film on both sides of the flair disposed close to an air bearing surface in such a fashion as to be aligned with the flair.

Abstract: A magnetic recording head comprises a write pole including a throat region with a leading edge, a trailing edge opposite the leading edge, and first and second side edges opposite one another. The magnetic recording head further comprises a first side wall gap layer disposed alongside the first side edge of the throat region, and a second side wall gap layer disposed alongside the second side edge of the throat region. Each of the first and second side wall gap layers has a first width at the leading edge of the throat region smaller than a second width at the trailing edge of the throat region.

Abstract: 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.

Abstract: A magnetic write head having a magnetic write pole with a wrap around magnetic trailing shield. The wrap around magnetic trailing shield is separated by a first non-magnetic side gap at a first side of the write pole and by a second non-magnetic side gap at a second side of the write pole. The first second non-magnetic side gap is larger than the first non-magnetic side gap and is preferably at least twice the thickness of the first non-magnetic side gap. This design provides additional protection adjacent track interference at one side of the write pole and additional protection against magnetic write field loss at the other side of the write pole.

Abstract: A magnetic recording head includes a magnetic recording write element including a main pole having a leading edge, an opposing trailing edge, a first side surface and a second side surface. A first side magnetic shield is positioned adjacent the first side surface and a second side magnetic shield positioned adjacent to the second side surface. First and second side shields are separated from the main pole by a first and second side shield gap. 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, and extends laterally away from the main pole and into the front shield a distance greater than the first or second side shield gap.

Abstract: The present invention relates to a perpendicular recording magnetic head. A perpendicular recording element includes a main magnetic pole film for emitting a perpendicular magnetic field and is supported by a slider. The main magnetic pole film includes an electrode film and a plated film, the electrode film is an alloy film of at least one element selected from the platinum group and Ni, and the plated film is a magnetic film grown on the electrode film.

Abstract: A PMR head comprises a substrate, a magnetic pole formed over the substrate, the pole having a pole tip having a cross-sectional tapered shape wherein the pole tip is surrounded by a write gap layer, an integrated shield comprising side shields on the substrate laterally surrounding the pole tip and a trailing shield overlying the pole tip and integral with the side shields.

Abstract: A magnetic write head for perpendicular magnetic data recording. The write head includes an wrap around trailing shield structure for improved write field strength, reduced skew related adjacent track interference and magnetic core width. The trailing wrap around shield includes a side shield that is separated from sides of the write pole by a side gap that is narrower near the leading edge of the write pole and wider near the trailing edge of the write pole.

Abstract: A magnetic write head for perpendicular magnetic data recording having a trailing shield with a two step throat height. The trailing shield is formed over a non-magnetic bump that forms a notch in the leading edge of the trailing shield. This notch defines a first, smaller throat height closest to the write pole and a larger throat height away from the write pole. The smaller throat height near the write pole prevents excess magnetic flux from leaking to the write pole, thereby ensuring efficient strong write field. The larger trailing shield throat height away from the write pole prevents magnetic saturation of the trailing shield and also greatly facilitates manufacturing avoiding problems related to variations and deviations in manufacturing processes used to define the trailing shield.

Abstract: A method provides a structure in a magnetic recording transducer. The structure resides on an underlayer. The method includes providing a protective layer and providing layer(s) for the structure. The protective layer covers a field region but exposes a device region in which the structure is to reside. A first portion of the layer(s) reside in the device region, while a second portion of the layer(s) reside in the field region. The method also includes removing the second portion of the layer(s) using an over-removal condition. The underlayer is covered by a remaining portion of the protective layer after the removing step is completed. The method also includes removing the remaining portion of the protective layer. An underlayer removal rate is substantially less than a protective layer during the step of removing of the protective layer.

Abstract: A method according to another embodiment includes forming a side shield layer of ferromagnetic material above a substrate; masking the side shield layer; milling an unmasked region of the side shield layer for forming a pole trench therein; and forming a pole layer in the pole trench. A structure according to one embodiment includes a substrate; a side shield layer of ferromagnetic material on the substrate, wherein the substrate has a region covered by the side shield layer and a region not covered by the side shield layer; a pole trench in the side shield layer and the region of the substrate not covered by the side shield layer; a layer of nonmagnetic material in the pole trench; and a pole layer in the pole trench, wherein the pole layer has a greater thickness above the region of the substrate not covered by the side shield layer than above the region of the substrate covered by the side shield layer.

Abstract: A perpendicular magnetic recording head includes a main magnetic pole layer and a return yoke layer which are laminated with a magnetic gap layer interposed therebetween on a medium-opposing surface, and a pair of side shield layers positioned on both sides in the track width direction of the main magnetic pole layer while interposing a nonmagnetic material layer therebetween. The magnetic gap layer is constituted by a first gap layer formed in a partial area in the track width direction bridging the main magnetic pole layer and the pair of side shield layers, and a second gap layer thinner than the first gap layer and interposed between the return yoke layer and the pair of side shield layers in a remaining area where the first gap layer is absent.

Abstract: In a perpendicular magnetic recording head including a main magnetic pole layer and a return yoke layer which are laminated with a magnetic gap layer interposed therebetween on a medium-opposing surface, and a pair of side shield layers positioned on both sides in the track width direction of the main magnetic pole layer while interposing a nonmagnetic material layer therebetween, the magnetic gap layer is formed in a partial area in the track width direction bridging the main magnetic pole layer and the pair of side shield layers. The pair of side shield layers are in contact with the return yoke layer in a remaining area where the magnetic gap layer is absent.

Abstract: A perpendicular magnetic recording write head is formed on the trailing surface of a head carrier or slider that has an air-bearing surface (ABS) oriented generally parallel to the surface of the disk during operation of the disk drive. The write head has a slanted ferromagnetic write pole (WP) that forms an angle between about 5 and 20 degrees from a normal to the ABS. The slanted WP is formed over the generally planar surface of the ferromagnetic main pole and the slanted surface of a support layer located between the ABS and the recessed end of the main pole. A trailing shield (TS) has a slanted face that is generally parallel to and spaced from the slanted WP, with a nonmagnetic gap layer located between the slanted face of the TS and the slanted WP.

Abstract: A perpendicular magnetic write head includes: a magnetic pole; a pair of side shields on both sides, in a write-track width direction, of the magnetic pole with respective side gaps in between; a trailing shield on a trailing side of the magnetic pole and the pair of side shields with a trailing gap in between. Each of the magnetic pole, the side shield, the trailing shield, the side gap, and the trailing gap has an end face exposed on an air bearing surface. The trailing gap has a first regional part and a second regional part. The first regional part separates a trailing edge of the magnetic pole from the trailing shield, and the second regional part separates the pair of side shields from the trailing shield. All or a part of the second regional part has a thickness larger than a thickness of the first regional part.

Abstract: A magnetic head having a magnetic wiggler structure for initiating a high frequency magnetic oscillation in a magnetic to improve media-writeability and increase data density. The wiggler structure includes a plurality of magnetic layers that are antiparallel coupled with one another across non-magnetic antiparallel coupling layers. The wiggler structure is arranged just up-track from the point of data writing so that the high frequency oscillation is initiated just prior to the writing of data on the magnetic media.

Abstract: The main magnetic pole piece of a magnetic head for perpendicular magnetic recording preferably has an inverted trapezoidal shape in order to maintain a sufficient recording magnetic field. Embodiments of the present invention enhance the covering power of the protective film around the main magnetic pole piece of the magnetic head and thereby ensure reliability even when the main magnetic pole piece has such a shape. In one embodiment, the protective film for protecting the main magnetic pole piece is formed by a sputtering apparatus while applying a bias, or it is formed by a carousel type sputtering apparatus or the chemical vapor deposition (CVD) technique.

Abstract: A perpendicular magnetic write head includes: a magnetic pole having an end face on an air bearing surface; and side shield layers each having an end face on the air bearing surface, and arranged on both sides, in a write track width direction, of the magnetic pole with a side gap in between. The end face of the magnetic pole has a geometry in which a width at a trailing edge is larger than a width at a leading edge. Relationship D1<D2, D1<D3, and D3?D2 are satisfied in the air bearing surface, where D1 is a gap length of the side gap at the trailing edge, D2 is a gap length of the side gap at the leading edge, and D3 is a gap length of the side gap at any position between the trailing edge and the leading edge.

Abstract: A thin-film magnetic recording head utilizing a timing based servo pattern is fabricated by sputtering a magnetically permeable thin film onto a substrate. A gap pattern, preferably a timing based pattern, is defined by the thin film. The gap pattern includes termination patterns or endpoints that are elliptical or diamond-shaped.