发明授权
- 专利标题: Side reading reduced GMR for high track density
- 专利标题(中): 侧视读数降低了高磁轨密度的GMR
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申请号: US11716945申请日: 2007-03-12
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公开(公告)号: US07599158B2公开(公告)日: 2009-10-06
- 发明人: Po Kang Wang , Moris Dovek , Jibin Geng , Tai Min
- 申请人: Po Kang Wang , Moris Dovek , Jibin Geng , Tai Min
- 申请人地址: US CA Milpitas
- 专利权人: Headway Technologies, Inc.
- 当前专利权人: Headway Technologies, Inc.
- 当前专利权人地址: US CA Milpitas
- 代理机构: Saile Ackerman LLC
- 代理商 Stephen B. Ackerman
- 主分类号: G11B5/33
- IPC分类号: G11B5/33 ; G11B5/127
摘要:
As track density requirements for disk drives have grown more aggressive, GMR devices have been pushed to narrower track widths to match the track pitch of the drive width. Narrower track widths degrade stability, cause amplitude loss, due to the field originating from the hard bias structure, and side reading. This problem has been overcome by adding an additional layer of soft magnetic material above the hard bias layers. The added layer provides flux closure to the hard bias layers thereby preventing flux leakage into the gap region. A non-magnetic layer must be included to prevent exchange coupling to the hard bias layers. In at least one embodiment the conductive leads are used to accomplish this. A process for manufacturing the device is also described.
公开/授权文献
- US20070171572A1 Side reading reduced GMR for high track density 公开/授权日:2007-07-26
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