公开(公告)号：US20240420733A1

公开(公告)日：2024-12-19

申请号：US18740054

申请日：2024-06-11

Applicant: Western Digital Technologies, Inc.

Inventor： Quang LE ,  Brian R. YORK ,  Sharon Swee Ling BANH ,  Hassan OSMAN ,  Hisashi TAKANO

IPC: G11B5/39 ,  G01R33/09 ,  G11C11/16 ,  H03K19/18 ,  H10B61/00 ,  H10N50/10 ,  H10N50/85 ,  H10N52/80

Abstract: The present disclosure generally relates to spintronic material stacks and devices. The various disclosed embodiments of YBiPt based spin orbit torque (SOT) stacks can be used for high temperature applications. Disclosed herein are various buffer and/or interlayer configurations in spintronic stacks that can promote growth of YBiPt in the (110) orientation, to promote a high spin Hall angle (SHA) in SOT applications. One embodiment is a spintronic stack comprising a buffer layer comprising one or more layers, the one or more layers each individually comprising: MgO (100), TiN (100), Ta, Nb, HfN, Ta3W2 (110), TaW2 (100), Ta3W2N, TaW2N, or heated YPt, an SOT layer comprising YBiPt in the (110) orientation, an interlayer comprising one or more of MgO, Ta3WN, TaW3N, Ta3W (110), TaW3 (100), YPt (110), NiFeGeN, NiAlN, NiAl, NiFeGe, NiAlGe, or HfN, and a ferromagnetic layer.

公开(公告)号：US20240240994A1

公开(公告)日：2024-07-18

申请号：US18355102

申请日：2023-07-19

Applicant: Western Digital Technologies, Inc. ,  Tokyo Institute of Technology

Inventor： Quang LE ,  Xiaoyong LIU ,  Brian R. YORK ,  Cherngye HWANG ,  Rohan Babu NAGABHIRAVA ,  Kuok San HO ,  Hisashi TAKANO ,  Son T. LE ,  Nam Hai PHAM ,  Huy H. HO

IPC: G01K7/36 ,  G11B5/39

CPC classification number: G01K7/36 ,  G11B5/3906 ,  G11B2005/0021

Abstract: The present disclosure generally relates to temperature detection devices, comprising an antiferromagnetic (AFM) layer a ferromagnetic (FM) layer disposed on the AFM layer and a spin-orbit torque (SOT) material layer disposed on the FM layer. The SOT material layer may comprise: a SOT material portion; a SOT material portion and an insulating material portion; or a plurality of SOT material portions and a plurality of insulating material portions. The temperature detection devices may also have a second FM layer disposed on the SOT material layer. The temperature detection devices may also have a second AFM layer disposed on the second FM layer. In another embodiment, the temperature detection devices may also have a heat sink.

公开(公告)号：US20230121375A1

公开(公告)日：2023-04-20

申请号：US18082721

申请日：2022-12-16

Applicant: Western Digital Technologies, Inc.

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

IPC: G11B5/39 ,  H10B61/00 ,  H10N52/80 ,  H01F10/32 ,  H10N50/85 ,  H10N52/00 ,  G11C11/16 ,  G11B5/31

Abstract: The present disclosure generally relate to spin-orbit torque (SOT) 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.

公开(公告)号：US20220415345A1

公开(公告)日：2022-12-29

申请号：US17867477

申请日：2022-07-18

Applicant: Western Digital Technologies, Inc.

Inventor： Quang LE ,  Hongquan JIANG ,  Cherngye HWANG ,  Hisashi TAKANO

IPC: G11B5/39

Abstract: The present disclosure relates to read head apparatus, and methods of forming read head apparatus, for magnetic storage devices, such as magnetic tape drives (e.g., tape drives). In one implementation, a read head for magnetic storage devices includes a lower shield, one or more upper shields, one or more lower leads, and a plurality of upper leads. The read head includes a plurality of read sensors, each read sensor of the plurality of read sensors including a first antiferromagnetic (AFM) layer. The read head includes a plurality of soft bias side shields disposed between and outwardly of the plurality of read sensors. The read head includes one or more second AFM layers disposed above the first AFM layer and the plurality of soft bias side shields along a downtrack direction.

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.

公开(公告)号：US20220005502A1

公开(公告)日：2022-01-06

申请号：US17380811

申请日：2021-07-20

Applicant: Western Digital Technologies, Inc.

Inventor： Quang LE ,  Jih-Shiuan LUO ,  Thao A. NGUYEN ,  Kuok San HO

IPC: G11B5/60 ,  G11B5/02 ,  G11B5/48

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 and a second write head each coupled to a first pad and a second pad of a slider pad and an electrical circuit coupled to the first and second pads. The first write head is a wide writing write head, and the second write head a narrow writing write head. The electrical circuit comprises a first sub-circuit and a second sub-circuit connected in parallel. The first sub-circuit comprises a capacitor and a connection to a first thermal fly height control (TFC) of the first write head. The second sub-circuit comprises an inductor and a connection to a second TFC of the second write head. The electrical circuit is further connected to a third TFC of a read head, the second write head comprising the read head.

公开(公告)号：US20220005498A1

公开(公告)日：2022-01-06

申请号：US17395291

申请日：2021-08-05

Applicant: Western Digital Technologies, Inc.

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

IPC: G11B5/37 ,  H01L43/04 ,  H01L43/06 ,  G11B5/39 ,  H01L43/14

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-to-shield spacing (i.e., read-gap).

公开(公告)号：US20210405131A1

公开(公告)日：2021-12-30

申请号：US16912500

申请日：2020-06-25

Applicant: Western Digital Technologies, Inc.

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

IPC: G01R33/09 ,  G01R27/14

Abstract: The present disclosure generally relates to sensor device, such as a magnetic sensor bridge, that utilizes a dual free layer (DFL) structure. The device includes a plurality of resistors that each includes the same DFL structure. Adjacent the DFL structure is a magnetic structure that can include a permanent magnet, an antiferromagnetic (AFM) layer having a synthetic AFM (SAF) structure thereon, a permanent magnetic having a SAF structure thereon, or an AFM layer having a ferromagnetic layer thereon. The DFL structures are aligned with different layers of the magnetic structures to differentiate the resistors. The different alignment and/or different magnetic structures result in a decrease in production time due to reduced complexity and, thus, reduces costs.

公开(公告)号：US20210233559A1

公开(公告)日：2021-07-29

申请号：US17229560

申请日：2021-04-13

Applicant: Western Digital Technologies, Inc.

Inventor： Quang LE ,  Michael Kuok San HO ,  Suping SONG ,  Goncalo Marcos BAIÃO DE ALBUQUERQUE

IPC: G11B5/127 ,  G11B5/31 ,  G11B5/39

Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a trailing shield, a main pole, an STO disposed between the trailing shield and the main pole, and a non-magnetic conductive structure (or non-magnetic conductive layers) adjacent to the main pole and in contact with the STO. The non-magnetic conductive structure provides additional paths for electrical currents to flow to the STO. The non-magnetic conductive structure enables higher current density to the STO without creating hot spots at the MFS. Maximum current efficiency and uniformity can be achieved with the non-magnetic conductive structure.

公开(公告)号：US20250095673A1

公开(公告)日：2025-03-20

申请号：US18368220

申请日：2023-09-14

Applicant: Western Digital Technologies, Inc.

Inventor： Quang LE ,  Xiaoyong LIU ,  Fan TUO ,  Brian R. YORK ,  Cherngye HWANG ,  Hisashi TAKANO

IPC: G11B5/127

Abstract: The present disclosure generally relates to a magnetic recording head comprising one or more spin-orbit torque (SOT) devices, the SOT devices each comprising a bismuth antimony (BiSb) layer. The magnetic recording head comprises a SOT device comprising a first shield extending to a media facing surface (MFS), a seed layer disposed over the first shield, the seed layer being disposed at the MFS, a free layer disposed on the seed layer, the free layer being disposed at the MFS, a bismuth antimony (BiSb) layer disposed over the free layer, the BiSb layer being recessed from the MFS, a second shield disposed over the BiSb layer, the second shield extending to the MFS, and a shield notch coupled to the second shield, the shield notch being disposed between the first shield and the second shield. The magnetic recording head may be a two-dimensional magnetic recording head comprising two SOT devices.