Invention Grant
US08451565B1 Magnetoresistive head having perpendicularly offset anisotropy films and a hard disk drive using the same
有权
具有垂直偏移的各向异性膜的磁阻头和使用其的硬盘驱动器
- Patent Title: Magnetoresistive head having perpendicularly offset anisotropy films and a hard disk drive using the same
- Patent Title (中): 具有垂直偏移的各向异性膜的磁阻头和使用其的硬盘驱动器
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Application No.: US13301596Application Date: 2011-11-21
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Publication No.: US08451565B1Publication Date: 2013-05-28
- Inventor: Susumu Okamura , Takahiro Ibusuki
- Applicant: Susumu Okamura , Takahiro Ibusuki
- Applicant Address: NL Amsterdam
- Assignee: HGST Netherlands B.V.
- Current Assignee: HGST Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agency: Zilka-Kotab, PC
- Main IPC: G11B5/33
- IPC: G11B5/33
Abstract:
In one embodiment, a magnetic head includes a lower shield layer, a sensor stack positioned above the lower shield layer, the sensor stack including a free layer, a layered hard bias magnet positioned above the lower shield layer and on both sides of the sensor stack in a track width direction, and an upper shield layer positioned above the hard bias magnet and the sensor stack. The hard bias magnet includes a perpendicular anisotropy film positioned above the lower shield layer and aligned with both sides of the sensor stack in the track width direction, wherein the perpendicular anisotropy film directs magnetic fields in a direction perpendicular to planes of formation thereof, and an in-plane anisotropy film positioned above the perpendicular anisotropy film, wherein the in-plane anisotropy film directs magnetic fields in a direction of planes of formation thereof.
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Information query
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