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    SOT DIFFERENTIAL READER AND METHOD OF MAKING SAME
    1.
    发明申请
    SOT DIFFERENTIAL READER AND METHOD OF MAKING SAME 审中-公开

    公开(公告)号：WO2022005639A1

    公开(公告)日：2022-01-06

    申请号：PCT/US2021/033197

    申请日：2021-05-19

    Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.

    Inventor： LE, Quang ,  LIU, Xiaoyong ,  BAI, Zhigang ,  LI, Zhanjie ,  HO, Kuok San ,  TAKANO, Hisashi

    IPC: H01L43/14 ,  H01L27/22 ,  G11C11/18 ,  G11B2005/0018 ,  G11B5/374 ,  G11B5/3912 ,  G11B5/3932 ,  H01L43/04 ,  H01L43/06

    Abstract: The present disclosure generally relates to spin-orbital torque (SOT) differential reader designs. The SOT differential reader is a multi-terminal device that comprises a first shield, a first spin hall effect layer, a first free layer, a gap layer, a second spin hall effect layer, a second free layer, and a second shield. The gap layer is disposed between the first spin hall effect layer and the second spin hall effect layer. Electrical lead connections are located about the first spin hall effect layer, the second spin hall effect layer, the gap layer, the first shield, and/or the second shield. The electrical lead connections facilitate the flow of current and/or voltage from a negative lead to a positive lead. The positioning of the electrical lead connections and the positioning of the SOT differential layers improves reader resolution without decreasing the shield-toshield spacing (i.e., read-gap).

    OPTICAL DEVICES FOR TILT IN CAMERA SYSTEMS
    3.
    发明申请
    OPTICAL DEVICES FOR TILT IN CAMERA SYSTEMS 审中-公开

    公开(公告)号：WO2022005516A1

    公开(公告)日：2022-01-06

    申请号：PCT/US2020/066660

    申请日：2020-12-22

    Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.

    Inventor： LE, Quang ,  NAGABHIRAVA, Rajeev ,  HO, Kuok San ,  BAI, Zhigang ,  LI, Zhanjie ,  LIU, Xiaoyong ,  MAURI, Daniele

    IPC: G02B27/64 ,  G03B13/36 ,  G03B2205/0069 ,  G03B3/10 ,  H04N5/2254 ,  H04N5/2257 ,  H04N5/23287

    Abstract: Aspects of the present disclosure generally relate to optical devices and related methods that facilitate tilt in camera systems, such as tilt of a lens. In one example, an optical device includes a lens, an image sensor disposed below the lens, a plurality of magnets disposed about the lens, and a plurality of: (1) vertical coil structures coiled in one or more vertical planes and (2) horizontal coil structures coiled in one or more horizontal planes. When power is applied, the coil structures can generate magnetic fields that, in the presence of the magnets, cause relative movement of the coil structures and associated structures. The plurality of vertical coil structures are configured to horizontally move the lens. The plurality of horizontal coil structures are configured to tilt the lens when differing electrical power is applied to at least two of the plurality of horizontal coil structures.

    DUAL WRITER FOR ADVANCED MAGNETIC RECORDING
    4.
    发明申请
    DUAL WRITER FOR ADVANCED MAGNETIC RECORDING 审中-公开

    公开(公告)号：WO2021107972A1

    公开(公告)日：2021-06-03

    申请号：PCT/US2020/023596

    申请日：2020-03-19

    Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.

    Inventor： NGUYEN, Thao A. ,  HO, Michael Kuok San ,  BAI, Zhigang ,  LI, Zhanjie ,  LE, Quang

    IPC: G11B5/187 ,  G11B5/23 ,  G11B5/265

    Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a first write head, a second write head, at least one read head, and a thermal fly height control element. The first write head is a wide writing write head comprising a first main pole and a first trailing shield. The second write head a narrow writing write head comprising a second main pole, a trailing gap, a second trailing shield, and one or more side shields. The first main pole has a shorter height and a greater width than the second main pole. The second main pole has a curved or U-shaped surface disposed adjacent to the trailing gap. The thermal fly height control element and the at least one read head are aligned with a center axis of the second main pole of the second write head.

    BISBX (012) LAYERS HAVING INCREASED OPERATING TEMPERATURES FOR SOT AND MRAM DEVICES
    5.
    发明申请
    BISBX (012) LAYERS HAVING INCREASED OPERATING TEMPERATURES FOR SOT AND MRAM DEVICES 审中-公开

    公开(公告)号：WO2023022764A1

    公开(公告)日：2023-02-23

    申请号：PCT/US2022/027960

    申请日：2022-05-06

    Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.

    Inventor： LE, Quang ,  YORK, Brian R. ,  HWANG, Cherngye ,  OKAMURA, Susumu ,  LIU, Xiaoyong ,  HO, Kuok San ,  TAKANO, Hisashi

    IPC: H01L43/10 ,  H01L43/12 ,  H01L43/02 ,  H01L27/22

    Abstract: The present disclosure generally relate to spin-orbit torque (SOT) magnetic tunnel junction (MTJ) devices comprising a topological insulator (TI) modulation layer. The TI modulation layer comprises a plurality of bismuth or bismuth-rich composition modulation layers, a plurality of TI lamellae layers comprising BiSb having a (012) crystal orientation, and a plurality of texturing layers. The TI lamellae layers comprise dopants or clusters of atoms, the clusters of atoms comprising a carbide, a nitride, an oxide, or a composite ceramic material. The clusters of atoms are configured to have a grain boundary glass forming temperature of less than about 400°C. Doping the TI lamellae layers comprising BiSb having a (012) crystal orientation with clusters of atoms comprising a carbide, a nitride, an oxide, or a composite ceramic material enable the SOT MTJ device to operate at higher temperatures while inhibiting migration of Sb from the BiSb of the TI lamellae layers.

    HELICAL COILS DESIGN AND PROCESS FOR DUAL WRITER MAGNETIC RECORDING
    7.
    发明申请
    HELICAL COILS DESIGN AND PROCESS FOR DUAL WRITER MAGNETIC RECORDING 审中-公开

    公开(公告)号：WO2021101580A1

    公开(公告)日：2021-05-27

    申请号：PCT/US2020/023679

    申请日：2020-03-19

    Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.

    Inventor： NGUYEN, Thao A. ,  HO, Michael Kuok San ,  BAI, Zhigang ,  LI, Zhanjie ,  LE, Quang

    IPC: G11B5/31 ,  G11B5/187

    Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a first write head disposed adjacent to a second write head. The first write head comprises a first main pole coupled to a first yoke having a first length. The second write head comprises a second main pole coupled to a second yoke having a second length that is less than the first length of the first yoke. A first coil is wrapped around the first yoke, and a second coil is wrapped around the second yoke. The first coil is wrapped around the first yoke a greater number of times than the second coil is wrapped around the second yoke. Both the first and second coils comprise first portions comprised of a first material and second portions comprised of a second material different than the first material.

    RECESSED TAPE SERVO HEAD TO CREATE AN EQUIPOTENTIAL TAPE BEARING SURFACE
    8.
    发明申请
    RECESSED TAPE SERVO HEAD TO CREATE AN EQUIPOTENTIAL TAPE BEARING SURFACE 审中-公开

    公开(公告)号：WO2022182379A1

    公开(公告)日：2022-09-01

    申请号：PCT/US2021/034544

    申请日：2021-05-27

    Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.

    Inventor： SEAGLE, David J. ,  LE, Quang ,  LI, Zhanjie

    IPC: G11B5/48 ,  G11B5/39

    Abstract: A tape drive comprising a tape head. The tape head comprises one or more data heads and one or more servo heads. Each servo head comprises a first shield, a first lead, a magnetoresistive sensor, a second lead, a second shield, and side shields. The magnetoresistive sensor is recessed from a media facing surface (MFS). The first lead is recessed from the MFS while the second lead and side shields are disposed at the MFS. A power supply is configured to apply a first electrical potential to the first and second shields, the side shields, and the second lead, and a second electrical potential to the first lead. The electrical design of each servo head is configured such that only one electric potential is exposed at the MFS, eliminating the possibility that a scratch will short the sensor.

    SOT FILM STACK FOR DIFFERENTIAL READER
    9.
    发明申请
    SOT FILM STACK FOR DIFFERENTIAL READER 审中-公开

    公开(公告)号：WO2022010584A1

    公开(公告)日：2022-01-13

    申请号：PCT/US2021/033912

    申请日：2021-05-24

    Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.

    Inventor： HWANG, Cherngye ,  LIU, Xiaoyong ,  LE, Quang ,  HO, Kuok San ,  TAKANO, Hisashi ,  YORK, Brian R.

    IPC: G11B5/39 ,  G11B5/11 ,  G11B5/315

    Abstract: The present disclosure generally relates to spin-orbital torque (SOT) differential reader designs. The SOT differential reader is a multi-terminal device comprising a first seed layer, a first spin hall effect (SHE) layer, a first interlayer, a first free layer, a gap layer, a second seed layer, a second SHE layer, a second free layer, and a second interlayer. The gap layer is disposed between the first SHE layer and the second SHE layer. The materials and dimensions used for the first and second seed layers, the first and second interlayers, and the first and second SHE layers affect the resulting spin hall voltage converted from spin current injected from the first free layer and the second free layer, as well as the ability to tune the first and second SHE layers. Moreover, the SOT differential reader improves reader resolution without decreasing the shield-to-shield spacing (i.e., read-gap).

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