Abstract: System and methods are illustrated for customizing the HGA bonding skew angle of a TDMR slider including a plurality of readers to adjust reader alignment relative to a track location on disk media. Overlay error caused by manufacturing variations is compensated for by adjusting the skew angle of the slider when it is bonded to the suspension to form the HGA. Process operations for manufacturing a TMDR HDD include manufacturing a multiple reader, multiple layer TDMR slider, determining an overlay error in the slider, determining a slider bonding skew angle based on the determined overlay error and other parameters, and bonding the slider to a HDD suspension at the determined bonding skew angle.

Abstract: System and methods are illustrated for customizing the HGA bonding skew angle of a TDMR slider including a plurality of readers to adjust reader alignment relative to a track location on disk media. Overlay error caused by manufacturing variations is compensated for by adjusting the skew angle of the slider when it is bonded to the suspension to form the HGA. Process operations for manufacturing a TMDR HDD include manufacturing a multiple reader, multiple layer TDMR slider, determining an overlay error in the slider, determining a slider bonding skew angle based on the determined overlay error and other parameters, and bonding the slider to a HDD suspension at the determined bonding skew angle.

Abstract: A disk drive is disclosed comprising a disk comprising a plurality of tracks, and a head comprising at least three read elements including a first read element, a second read element, and a third read element. When the head is within a first radial band of the disk, data recorded on the disk is detected using the first read element and the second read element. When the head is within a second radial band of the disk different from the first radial band, data recorded on the disk is detected using the first read element and the third read element. The first read element is substantially aligned down-track with the third read element when the head is over a first radial location of the disk.

Abstract: A magnetic recording transducer for use in a data storage device is described. The transducer has a main writer pole and magnetic shields adjacent to the main writer pole. The magnetic shields include a first plated soft ferromagnetic layer, a second plated soft ferromagnetic layer, and an antiferromagnetic coupling (AFC) trilayer between the first plated soft ferromagnetic layer and the second plated soft ferromagnetic layer. The AFC trilayer includes a first AFC layer of sputtered ferromagnetic material; a second AFC layer of a nonmagnetic antiferromagnetic exchange material, and a third AFC layer of sputtered ferromagnetic material. Shields with AFC trilayers in leading, side, and/or trailing shields, as well as between shields are provided. A method of fabricating is also provided.

Abstract: A read transducer having a first read sensor, a second read sensor, and a first middle shield is provided. The second read sensor is disposed in a down track direction from the first read sensor. The first middle shield is disposed between the first read sensor and the second read sensor. The first middle shield includes a first metallic middle shield layer disposed between the first read sensor and the second read sensor, a second metallic middle shield layer disposed between the first metallic middle shield layer and the second read sensor, and a first magnetic-spacer layer disposed between the first metallic middle shield layer and the second metallic middle shield layer. The first metallic middle shield layer and the second metallic middle shield layer have substantially the same polarity.

Abstract: A disk drive is disclosed comprising a disk comprising a plurality of tracks, and a head comprising a first read element and a second read element. A spacing of the first and second read elements is measured, and based on the measured spacing, the tracks are grouped into radial bands that define at least one one-dimensional recording area on the disk and at least one two-dimensional recording area on the disk. When the head is within a first two-dimensional recording area, data recorded on the disk is detected by processing a first read signal generated by the first read element and by processing a second read signal generated by the second read element using a two-dimensional demodulation algorithm. When the head is within a first one-dimensional recording area, data recorded on the disk is detected by processing the first read signal using a one-dimensional demodulation algorithm.

Abstract: A perpendicular magnetic recording medium adapted for high recording density and high data recording rate comprises a non-magnetic substrate having at least one surface with a layer stack formed thereon, the layer stack including a perpendicular recording layer containing a plurality of columnar-shaped magnetic grains extending perpendicularly to the substrate surface for a length, with a first end distal the surface and a second end proximal the surface, wherein each of the magnetic grains has: (1) a gradient of perpendicular magnetic coercivity Hk extending along its length between the first end and second ends; and (2) predetermined local exchange coupling strengths along the length.

Abstract: A method and system provide a magnetic transducer having an air-bearing surface (ABS). The method provides a first read sensor stack and defines a first read sensor in a stripe height direction from the first read sensor stack. The stripe height direction is perpendicular to the ABS. A shield is provided on the first read sensor stack and in a down track direction from the first read sensor stack. A second read sensor stack is provided. The shield is between the first read sensor and the second read sensor stack in the down track direction. Both the first read sensor and the second read sensor are defined from the first read sensor stack and from the second read sensor stack, respectively, in a cross-track direction. The cross-track direction is substantially perpendicular to the down track direction and substantially perpendicular to the stripe height direction.

Abstract: Disclosed are the action and use of water extracts and polysaccharides from Fusarium oxysporums in immune enhancement, which belong to the field of biological pharmacy. The water extracts and polysaccharides from Fusarium oxysporums have a significant immune enhancement effect, which can promote the proliferation of macrophages, increase the phagocytic ability of macrophages, activate macrophages to release immunological active factors NO, IL-1? and TNF-? and can be used in lower immune function diseases and tumor adjuvant treatment.

Abstract: A tunnel magnetoresistance (TMR) read sensor having a tabbed AFM layer and an extended pinned layer and methods for making the same are provided. The TMR read sensor has an AFM layer recessed from the air bearing surface, providing a reduced shield-to-shield distance.

Abstract: A high-precision alignment method with high throughput is proposed, which can be used for wafer-to-wafer, chip-to-wafer or chip-to-chip bonding. The scheme implements pairing patterned magnets predetermined designed and made using wafer level process on two components (wafer or chip). The magnetization in patterned magnet can be set at predetermined configuration before bonding starts. When, the two components are bought to close proximity after a coarse alignment, the magnetic force will bring the magnet pairs together and aligned the patterned magnet on one component with its mirrored or complimentary patterned magnets on the other component to minimize the overall the magnetic energy of the pairing magnet. A few patterned magnet structures and materials, with their unique merits are proposed as examples for magnet pair for the self-alignment purpose.

Abstract: A perpendicular magnetic recording (PMR) media including a non-magnetic or superparamagnetic grain isolation magnetic anisotropy layer (GIMAL) to provide a template for initially well-isolated small grain microstructure as well as improvement of Ku in core grains of a magnetic recording layer. The GIMAL composition may be adjusted to have lattice parameters similar to a bottom magnetic recording layer and to provide a buffer for reducing interface strains caused by lattice mismatch between the bottom magnetic recording layer and an underlying layer.

Abstract: A data storage device comprising a transducer that includes a sensor array comprising multiple read sensors in a down track direction. A first pair of sensors in the sensor array reads data from a track, and at least one read sensor reads noise from an adjacent track.

Abstract: A method and system provide a magnetic transducer having an air-bearing surface (ABS) and at least two read sensors. The magnetic transducer also includes a first read shield, a first read sensor, a middle shield, a second read sensor, a second read shield, a first electric gap and a second electric gap. The first read sensor is in a down track direction from the first read shield. The middle shield is in a down track direction from the first read sensor. The middle shield is between the first read sensor and the second read sensor. A first portion of the first electric gap is in a direction opposite to the down track direction from the first read sensor. The first read sensor and the second read sensor are between the first electric gap and the second electric gap in a cross-track direction.

Abstract: A perpendicular magnetic recording medium adapted for high recording density and high data recording rate comprises a non-magnetic substrate having at least one surface with a layer stack formed thereon, the layer stack including a perpendicular recording layer containing a plurality of columnar-shaped magnetic grains extending perpendicularly to the substrate surface for a length, with a first end distal the surface and a second end proximal the surface, wherein each of the magnetic grains has: (1) a gradient of perpendicular magnetic anisotropy field Hk extending along its length between the first end and second ends; and (2) predetermined local exchange coupling strengths along the length.

Abstract: A writer includes a write element having a tip portion to generate a write field during a write operation and a conductive assembly that delivers a write assist current through the tip portion in a cross-track direction to generate a write assist field during the write operation that extends beyond a medium confronting surface located at the tip portion to lower a coercivity of a magnetic medium proximate to the write element.

Abstract: A method and system provide a magnetic transducer having an air-bearing surface (ABS) and including first and second read sensors and a shield. The shield is in a down track direction from the first read sensor and between the first and second read sensors. The shield includes a first shield layer, a second shield layer and an insulating layer between the first and second shield layers. The first shield layer is between the first read sensor and the second shield layer. The second shield layer is between the first shield layer and the second read sensor. The first shield layer has a first footprint. The second shield layer has a second footprint. The second shield layer overlaps the first shield layer in the down track direction. The overlap is not more than fifty percent of the first footprint and not more than fifty percent of the second footprint.

Abstract: A method and system provide a magnetic transducer including first and second read sensors, a shield and a conductive via. The shield is between the first and second read sensors. In one aspect, the magnetic transducer also includes first and second read shields. In this aspect, the first read shield has a read shield aperture. The conductive via extends through the read shield aperture, provides electrical contact to the shield and is insulated from the first read shield. In another aspect, the shield has first and second shield layers separated by an insulating layer. In this aspect, the second shield layer has an aperture therein. The conductive via extends through this aperture, provides electrical contact to the first shield layer and is insulated from the second shield layer.

Abstract: A method fabricates a side shield for a magnetic transducer having a nonmagnetic layer and an ABS location corresponding to an ABS. The nonmagnetic layer has a pole trench therein. The pole trench has a shape and location corresponding to the pole. A wet etchable layer is deposited. Part of the wet etchable layer resides in the pole trench. A pole is formed. The pole has a bottom and a top wider than the bottom in the pole tip region. Part of the pole in the pole tip region is in the pole trench on at least part of the wet etchable layer. At least parts of the wet etchable layer and the nonmagnetic layer are removed, forming an air bridge. The air bridge is between part of the pole at the ABS location and an underlying layer. Side shield layer(s) that substantially fill the air bridge are deposited.

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.