Invention Application
- Patent Title: Higher Areal Density Non-Local Spin Orbit Torque (SOT) Writer with Topological Insulator Materials
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Application No.: US18229785Application Date: 2023-08-03
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Publication No.: US20250006221A1Publication Date: 2025-01-02
- Inventor: Quang LE , Xiaoyong LIU , Cherngye HWANG , Brian R. YORK , Son T. LE , Sharon Swee Ling BANH , Maki MAEDA , Fan TUO , Yu TAO , Hisashi TAKANO , Nam Hai PHAM
- Applicant: Western Digital Technologies, Inc. , Tokyo Institute of Technology
- Applicant Address: US CA San Jose; JP Tokyo
- Assignee: Western Digital Technologies, Inc.,Tokyo Institute of Technology
- Current Assignee: Western Digital Technologies, Inc.,Tokyo Institute of Technology
- Current Assignee Address: US CA San Jose; JP Tokyo
- Main IPC: G11B5/39
- IPC: G11B5/39

Abstract:
The present disclosure generally relates to a magnetic media drive comprising a magnetic recording head. The magnetic recording head comprises a main pole disposed at a media facing surface (MFS), a shield disposed at the MFS, a spin blocking layer disposed between the shield and the main pole, at least one non-magnetic layer disposed between the main pole and the shield, the at least one non-magnetic layer being disposed at the MFS, and at least one spin orbit torque (SOT) layer disposed over the at least one non-magnetic layer, the SOT layer being recessed a distance of about 20 nm to about 100 nm from the MFS. A ratio of a length of the SOT layer to a thickness of the SOT layer is greater than 1. The at least one SOT layer comprises BiSb.
Information query
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