发明授权
- 专利标题: Thermally-assisted perpendicular magnetic recording system and head
- 专利标题(中): 热辅助垂直磁记录系统和头
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申请号: US10789907申请日: 2004-02-27
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公开(公告)号: US07068453B2公开(公告)日: 2006-06-27
- 发明人: Bruce David Terris , Jan-Ulrich Thiele
- 申请人: Bruce David Terris , Jan-Ulrich Thiele
- 申请人地址: NL Amsterdam
- 专利权人: Hitachi Global Storage Technologies Netherlands B.V.
- 当前专利权人: Hitachi Global Storage Technologies Netherlands B.V.
- 当前专利权人地址: NL Amsterdam
- 代理商 Thomas R. Berthold
- 主分类号: G11B5/02
- IPC分类号: G11B5/02
摘要:
A thermally-assisted perpendicular magnetic recording head includes a write pole tip for generating a magnetic write field in the perpendicular magnetic recording layer, a magnetic shield that confines the write field essentially to the data track to be recorded, an electrically resistive heater for heating the recording layer in the presence of the write field, and a return pole. The write pole tip width essentially defines data track width and is substantially surrounded by the magnetic shield. The shield may include side shields with ends located on opposite sides of the write pole tip and a trailing shield having an end spaced from the write pole tip. The resistive heater is wider than the data track and heats both the data track and adjacent tracks, but thermally-assisted magnetic recording occurs only in the data track because the confined magnetic field in the adjacent tracks is less than the required write field.