| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 360119010 | Gap spacer | 30 |
| 20080259493 | Wire-assisted write device with high thermal reliability - A magnetic device includes a first pole having a first pole tip. A conductor, which is adjacent to an edge of the first pole tip, carries current to generate a second field that augments a first field generated by the first pole. The width of the conductor is in the range of about one to about five times the width of the trailing edge of the first pole tip. | 10-23-2008 |
| 20090059422 | MEDIA PROCESSING DEVICE AND MAGNETIC HEAD APPLICABLE TO IT - A media processing device may include a frame with a transport passage in which information recording media are transported and a magnetic head for processing magnetic information signals on the information recording media. The magnetic head may be embedded in the frame and part of the frame may be interposed between the magnetic head and the transport passage. | 03-05-2009 |
| 20090135520 | Magnetic tape head - A magnetic tape head has a base substrate, a magnetic head layer formed on the base substrate, and a closure piece formed on the magnetic head layer. The distance from a first plane comprising a point on the tape bearing surface of the base substrate to a third plane comprising a point on the tape bearing surface of the closure piece is equal to or greater than the distance from the first plane to a second plane comprising a point on the tape bearing surface of the magnetic head layer. | 05-28-2009 |
| 20100290156 | METHOD AND APPARATUS FOR CONTROLLED FRONT SHIELD THICKNESS FOR PERPENDICULAR WRITER - A method for forming a transducing head having a magnetic writer includes forming a pedestal adjacent to a writer pole and a gap layer, depositing a front shield on the pedestal, etching the front shield, and depositing a backfill layer upon the front shield after etching. The front shield has a controlled thickness upon etching. | 11-18-2010 |
| 20110051284 | SYSTEMS AND METHODS FOR FABRICATING MAGNETIC WRITER STRUCTURES USING POST-DEPOSITION TILTING - A method according to one embodiment includes forming a first portion of a thin film writer structure on a substantially planar portion of a substrate such that planes of deposition of the first portion of the writer structure are substantially parallel to a plane of the substrate; forming a portion of a write gap of the writer structure at an angle of greater than 0° relative to the substantially planar portion of the substrate; and causing the writer structure to tilt at an angle relative to the plane of the substrate such that a plane of deposition of the write gap is oriented about perpendicular to a final media-facing surface of the writer structure. A system according to one embodiment includes a first portion comprising at least a portion of a coil structure and at least a portion of a magnetic yoke, the first portion being oriented at an angle of greater than 0° and less than 90° relative to a substantially planar portion of an underlying substrate; a first pole; a second pole; and a write gap, a portion of the write gap having a plane of deposition oriented about perpendicular to a final media-facing surface of the write gap. | 03-03-2011 |
| 20110102940 | SYSTEM, METHOD AND APPARATUS FOR PLANARIZING SURFACES WITH FUNCTIONALIZED POLYMERS - The surfaces of hard disk drive magnetic media disks are planarized with surface-grafted polymer chains that form a monolayer-thick film of uniform, self-limiting thickness. The thickness is controlled by the molecular weight of the polymer selected. The polymer film may be swollen by a solvent vapor to fill variable width gaps in the topography. The polymer may be cross-linked in place by radiation or thermal processing. | 05-05-2011 |
| 20120147499 | MAGNETIC 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 is magnetically connected to the bottom shield and is greater than the bottom shield in length in a direction perpendicular to the medium facing surface. The second return path section magnetically couples the top shield and the main pole to each other. The coil includes a first portion that passes through a space defined by the main pole and the first return path section, and a second portion that passes through a space defined by the main pole and the second return path section. | 06-14-2012 |
| 20120262824 | MAGNETIC WRITE HEAD WITH STRUCTURED TRAILING POLE - The invention is directed to a magnetic write head configured for writing to a magnetic medium, such as, a magnetic tape along a longitudinal direction x. The magnetic write head includes a trailing pole with a first face of height r | 10-18-2012 |
| 20140204485 | WRITE POLE BOX SHIELD - A magnetic element may be generally configured as a data writer constructed at least with a write pole within a box shield that consists of first and second side shields and first and second vertical shields. The write pole may be separated from the box shield by a multi-layer gap structure that consists of at least two gap layers of dissimilar materials. | 07-24-2014 |
| 20140268415 | GAP BETWEEN MAGNETIC MATERIALS - In accordance with one embodiment, a method may be implemented by depositing a non-magnetic gap layer of material above a main pole layer of magnetic material; depositing a sacrificial layer of material above the non-magnetic gap layer of material; etching a portion of the sacrificial layer of material while not entirely removing the sacrificial layer of material; and depositing additional sacrificial material to the etched sacrificial layer. | 09-18-2014 |
| 360119020 | For perpendicular recording head | 18 |
| 20080278852 | PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording head and a method of manufacturing said perpendicular magnetic recording head are provided. The perpendicular magnetic recording head has a main pole, a coil, which applies a magnetic field to the main pole, and a return pole constituting a magnetic circuit together with the main pole. The main pole has a back pole around which the coil is wound and a front pole contacting the back pole. The back pole and the front pole are formed on the same plane. | 11-13-2008 |
| 20080278853 | PERPENDICULAR MAGNETIC RECORDING HEAD - To provide a perpendicular magnetic recording head which can suppress side fringing while keeping the recording magnetic field intensity from decreasing. | 11-13-2008 |
| 20090027805 | Method and System for Measuring Spacing in a Perpendicular Magnetic Recording - PMR spacing is measured by writing a pattern on a magnetic storage layer in non-return-to-zero notation, reading the pattern from the magnetic storage layer, analyzing a first harmonic component of the pattern that has a first amplitude, analyzing a second harmonic component of the pattern that has a second amplitude, measuring a ratio between the first and the second amplitudes of the first and second harmonic components, and determining a first spacing based on the ratio. In another embodiment, spacing is measured by analyzing a third harmonic component on the magnetic storage layer that has a third amplitude, measuring a difference in the amplitudes of the second and the third harmonic components while varying the first spacing and taking the ratio of the difference of the two each harmonic components. | 01-29-2009 |
| 20090141397 | PERPENDICULAR MAGNETIC WRITE HEAD WITH STEPPED WRITE POLE FOR REDUCED MCW DEPENDENCY ON SKEW ANGLE - A magnetic write head for perpendicular magnetic data recording having a notched write pole for reduced magnetic core width (MCW) dependence on skew. The write pole is configured with a notch that can extend to or slightly beyond the flare point of the write pole, and is formed on the leading portion of the write pole. The notch can have a notch depth, as measured from the ABS of 50-200 nm or about 120 nm. The notch can have a notch height, measured in the down track direction that is 40-90 nm or 20-90 percent of the write pole height. | 06-04-2009 |
| 20090268344 | Graded bevel tapered write pole design for field enhancement - 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. | 10-29-2009 |
| 20130242431 | MAGNETIC RECORDING HEAD WITH NON-CONFORMAL SIDE SHIELD GAP - A magnetic write head having a shield structure that provides both a leading shield and side shielding function. The magnetic shield is separated from the sides and leading edge of the write pole by a non-magnetic gap layer that has a non-uniform thickness. The non-magnetic gap layer is thicker near the leading edge and thinner at the trailing edge. This allows for increased side field gradient near the trailing edge of the write pole and decreased write field loss at the leading edge of the write pole. | 09-19-2013 |
| 20140063657 | Magnetic Recording Head Having a Pole Tip Shield - A write element including a pole tip shield is disclosed. In embodiments disclosed, for example, the pole tip shield includes side shield portions fabricated of a graded magnetic moment material to form graded side shield portions having a magnetic moment that decreases in the down-track direction along a length of the side shield portions. In another embodiment, the pole tip shield includes side shield portions having a shortened length extending along a partial length of side edges of the pole tip. In illustrated embodiments, the side shield portions are formed of a contoured body having an indented portion forward of the leading edge of the pole tip. The indented portion has a rounded indented surface contour forming a rounded profile for a gap region between a leading edge portion of the pole tip shield forward of the leading edge of the pole tip. | 03-06-2014 |
| 20140098441 | PERPENDICULAR MAGNETIC WRITE HEAD AND MAGNETIC RECORDING DEVICE - A perpendicular magnetic write head includes: a magnetic pole having an end surface exposed on an air bearing surface, and extending in a height direction perpendicular to the air bearing surface; a first yoke having an end surface exposed on the air bearing surface, and facing a forward section of the magnetic pole with a gap layer in between; a second yoke located behind the first yoke with an insulating layer in between in the height direction, and connected to a backward section of the magnetic pole; a shield connecting the first yoke to the second yoke; and an additional magnetic layer located behind a boundary between the first yoke and the insulating layer, and in contact with the first yoke. | 04-10-2014 |
| 20140118861 | MAGNETIC RECORDING HEAD AND DISK APPARATUS INCLUDING THE SAME - According to one embodiment, a magnetic recording head includes a main magnetic pole configured to apply a recording magnetic field to a recording layer of a recording medium, a spin torque oscillator adjacent to the main magnetic pole in a vicinity of a disk-facing surface confronting the recording medium, a recording coil configured to excite the main magnetic pole, a recording current control circuit configured to supply a recording current to the recording coil, a constant current supply circuit configured to supply a constant current to the spin torque oscillator, and an inverted current supply circuit configured to supply an inverted current having a polarity different from the constant current to the spin torque oscillator. | 05-01-2014 |
| 20150380016 | MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING INCLUDING ANGLED SIDE SHIELDS SURFACES - A first side shield has a first sidewall and a second sidewall. A second side shield has a third sidewall and a fourth sidewall. The distance between the first sidewall and the third sidewall decreases with increasing proximity to the top surface of a substrate. The second and fourth sidewalls are close to perpendicular to the top surface of the substrate. Each of the second and fourth sidewalls has an edge farthest from the top surface of the substrate, the edge being parallel to the medium facing surface. The main pole has a first, a second, a third and a fourth side surface. The first side surface is opposed to the first sidewall. A portion of the second side surface is opposed to the second sidewall. The third side surface is opposed to the third sidewall. A portion of the fourth side surface is opposed to the fourth sidewall. | 12-31-2015 |
| 360119030 | Laminated spacer | 4 |
| 20080239568 | PERPENDICULAR MAGNETIC RECORDING HEAD AND MANUFACTURING METHOD THEREOF - A perpendicular magnetic recording head includes a main magnetic pole layer and a return yoke layer laminated on the main magnetic pole layer with a magnetic gap layer disposed in an opposing surface opposite a recording medium. Further included is a resist layer having a front end surface at a position retreated from the opposing surface opposite the recording medium to a deeper side in a height direction. The resist layer defines a throat height of the return yoke layer at the front end surface position. A Ti film is formed directly below the resist layer, forming at least a portion of the magnetic gap layer. The Ti film is a non-light transmitting film through which light cannot pass. | 10-02-2008 |
| 20150103438 | Data Reader with Magnetic Seed Lamination - A magnetic element capable of reading data may generally be configured at least with a magnetic seed lamination disposed between a data reader stack and a magnetic shield. The magnetic seed lamination may be constructed at least with one magnetic layer coupled to the bottom shield and at least one non-magnetic layer decoupling the data reader stack from the at least one magnetic layer. | 04-16-2015 |
| 20150131182 | MAGNETIC STACK COUPLING BUFFER LAYER - A data storage system may be configured at least with a seed lamination that is disposed between a magnetic stack and a magnetic shield. The seed lamination may be constructed and operated with a coupling buffer layer and a seed layer with the coupling buffer layer fabricated of an alloy of cobalt and a transition metal. | 05-14-2015 |
| 20150302873 | TWO SIDE BY SIDE MIMO READ SENSORS FABRICATED BY SELF-ALIGNED PROCESSING - The present invention generally relates to a read head in a magnetic recording head. The read head has side-by-side sensors that are formed of the same width by initially forming a single sensor and then removing selected portions of either the pinned or free magnetic layer of the sensor. Then, insulating material is filled into the area from where the selected portions have been removed. A hardmask may be necessary to properly define the side-by-side sensors to ensure that the selected portions of either the pinned or free magnetic layer are removed. The hardmask may be formed by blanket depositing hardmask material and then selectively removing the hardmask material such that the remaining hardmask material is equal to the width of the side-by-side sensors. | 10-22-2015 |
| 360119040 | Configuration detail | 4 |
| 20100302680 | Perpendicular magnetic write head and magnetic write device - 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 D | 12-02-2010 |
| 20110090594 | DEVICE FOR GENERATING HIGH FREQUENCY MAGNETIC FIELDS IN A REST-FRAME OF A MAGNETIC MEDIUM - 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. | 04-21-2011 |
| 20110157746 | Perpendicular magnetic recording head and magnetic recording device - 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. | 06-30-2011 |
| 20120069470 | PMR head with integrated side shield (ISS) - 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. | 03-22-2012 |
| 360119050 | For longitudinal thin film recording head | 2 |
| 20130003224 | MAGNETIC WRITE HEAD WITH STRUCTURED TRAILING POLE - The invention is directed to a magnetic write head configured for writing to a magnetic medium, such as, a magnetic tape along a longitudinal direction x. The magnetic write head includes a trailing pole with a first face of height r | 01-03-2013 |
| 360119060 | Pancake type | 1 |
| 20100321824 | MAGNETIC RECORDING HEAD HAVING SECONDARY SUB-GAPS - A magnetic head and method for making same which can be used for formatting or writing servo tracks or data on a tape. In one example, the magnetic head may include a magnetic thin film layer; at least one gap defined in the magnetic thin film layer; and at least one secondary sub-gap structure within the magnetic thin film layer, the at least one gap positioned proximate the at least one secondary sub-gap structure. Through the use of the secondary sub-gap structure, the gap (i.e. a record gap or channel) can be made thinner than in conventional heads. | 12-23-2010 |
