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    CURRENT-ASSISTED MAGNETIC RECORDING WRITE HEAD WITH IMPROVED WRITE GAP STRUCTURE
    11.
    发明申请
    CURRENT-ASSISTED MAGNETIC RECORDING WRITE HEAD WITH IMPROVED WRITE GAP STRUCTURE 审中-公开

    公开(公告)号：US20200005815A1

    公开(公告)日：2020-01-02

    申请号：US16277953

    申请日：2019-02-15

    Applicant: Western Digital Technologies, Inc.

    Inventor： Zhigang BAI ,  Venkatesh CHEMBROLU ,  Yaguang WEI ,  Terence LAM ,  Michael Kuok San HO ,  Lijie GUAN ,  Suping SONG ,  Supradeep NARAYANA

    IPC: G11B5/115 ,  G11B5/53

    Abstract: A current-assisted magnetic recording write head has an electrically conductive layer in the write gap between the write pole and the trailing shield. Electrical circuitry directs current from the write pole, through the conductive layer, to the trailing shield. The current through the conductive layer generates an Ampere field substantially orthogonal to the magnetization in the write pole to assist magnetization switching of the write pole. The write head's magnetic throat height (THm) is substantially the thickness of the trailing shield at the write gap, while the write head's electrical throat height (THe) is substantially the height of the conductive layer in the write gap. In embodiments of this invention, the signal-to-noise ratio (SNR) of the readback signal and the soft error rate (SER) of the recorded data can be improved with a write gap structure wherein THe is greater than THm.

    SPINTRONIC DEVICE COMPRISING DUAL FGL AND DUAL SPL TO REDUCE PERPENDICULAR FIELD AT WRITING LOCATION
    13.
    发明公开
    SPINTRONIC DEVICE COMPRISING DUAL FGL AND DUAL SPL TO REDUCE PERPENDICULAR FIELD AT WRITING LOCATION 审中-公开

    公开(公告)号：US20240144963A1

    公开(公告)日：2024-05-02

    申请号：US18226111

    申请日：2023-07-25

    Applicant: Western Digital Technologies, Inc.

    Inventor： Muhammad ASIF BASHIR ,  Alexander GONCHAROV ,  Zhigang BAI ,  Masato SHIIMOTO ,  Yunfei DING

    IPC: G11B5/31

    CPC classification number: G11B5/3116 ,  G11B5/314

    Abstract: The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head. The magnetic recording head comprises a main pole, a hot seed layer, and a spintronic device disposed between the main pole and the hot seed layer. The spintronic device comprises two field generation layers (FGLs), two spin polarization layers (SPLs), and two spin kill layers. The second SPL of the spintronic device drives the second FGL. The spintronic device further comprises one or more optional thin negative beta material layers, such as layers comprising FeCr, disposed in contact with at least one of the spin kill layers. When electric current is applied, the spin kill layers and optional negative beta material layers eliminate or reduce any spin torque between the FGLs and the SPLs.

    OPTICAL DEVICES FOR INDEPENDENT MOVEMENT CONTROL OF LENSES AND IMAGE SENSORS IN CAMERA SYSTEMS
    15.
    发明申请
    OPTICAL DEVICES FOR INDEPENDENT MOVEMENT CONTROL OF LENSES AND IMAGE SENSORS IN CAMERA SYSTEMS 有权

    公开(公告)号：US20210409600A1

    公开(公告)日：2021-12-30

    申请号：US16915723

    申请日：2020-06-29

    Applicant: Western Digital Technologies, Inc.

    Inventor： Quang Le ,  Zhigang BAI ,  Xiaoyong LIU ,  Zhanjie LI ,  Kuok San HO ,  Rajeev NAGABHIRAVA

    IPC: H04N5/232 ,  G02B7/09 ,  G03B13/36 ,  H02K41/035 ,  H04N5/225

    Abstract: Aspects of the present disclosure relate to optical devices and related methods that facilitate independent control of movement of lenses and image sensors in camera systems. In one example, an image sensor is movable independently of and relative to a lens, and the lens is movable independently of the image sensor. In one example, an optical device includes a lens, and an image sensor disposed below the lens. The image sensor is movable relative to the lens. The optical device includes a plurality of magnets disposed about the lens, a plurality of vertical coil structures coiled in one or more vertical planes, and one or more horizontal coil structures coiled in one or more horizontal planes. The plurality of vertical coil structures are configured to, when powered, move the image sensor relative to the lens. The one or more horizontal coil structures are configured to, when powered, move the lens.

    Dual Writer For Advanced Magnetic Recording
    16.
    发明申请
    Dual Writer For Advanced Magnetic Recording 有权

    公开(公告)号：US20210390976A1

    公开(公告)日：2021-12-16

    申请号：US17463368

    申请日：2021-08-31

    Applicant: Western Digital Technologies, Inc.

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

    IPC: G11B5/09 ,  G11B5/60 ,  G11B5/40 ,  G11B5/31 ,  G11B5/23 ,  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, 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.

    Optical Devices For Tilt In Camera Systems
    20.
    发明申请
    Optical Devices For Tilt In Camera Systems 有权

    公开(公告)号：US20220078348A1

    公开(公告)日：2022-03-10

    申请号：US17455862

    申请日：2021-11-19

    Applicant: Western Digital Technologies, Inc.

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

    IPC: H04N5/232 ,  H04N5/225 ,  G03B3/10 ,  G03B13/36

    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.

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