发明授权
- 专利标题: Scissor magnetic read head with wrap-around magnetic shield
- 专利标题(中): 剪刀式磁头读写头带环绕磁屏蔽
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申请号: US13691525申请日: 2012-11-30
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公开(公告)号: US08749926B1公开(公告)日: 2014-06-10
- 发明人: Quang Le , Simon H. Liao , Guangli Liu , Stefan Maat , Xiaozhong Dang , David J. Seagle , Petrus A. Van Der Heijden
- 申请人: HGST Netherlands B.V.
- 申请人地址: NL Amsterdam
- 专利权人: HGST Netherlands B.V.
- 当前专利权人: HGST Netherlands B.V.
- 当前专利权人地址: NL Amsterdam
- 代理机构: Zilka-Kotab, PC
- 主分类号: G11B5/39
- IPC分类号: G11B5/39
摘要:
A magnetic scissor type magnetic read head having magnetic side shielding for reduced effective track width and having side biasing for improved stability. The read head includes first and magnetic side shields that each include first and second magnetic layers and an anti-parallel exchange coupling layer sandwiched there-between. The magnetic layers of the side shields are anti-parallel coupled with one another such that one of the magnetic layers has its magnetization oriented in a first direction parallel with the air bearing surface and the second magnetic layer has its magnetization oriented in a second direction that is opposite to the first direction and also parallel with the air bearing surface. These magnetizations of the first and second magnetic layers provide a bias field that stabilizes the magnetization of the free magnetic layers of the sensor stack to prevent flipping of the magnetizations of these layers.
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