发明授权
- 专利标题: Thermally-assisted magnetic recording head comprising near-field light generator
- 专利标题(中): 包括近场光发生器的热辅助磁记录头
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申请号: US12557078申请日: 2009-09-10
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公开(公告)号: US08325567B2公开(公告)日: 2012-12-04
- 发明人: Daisuke Miyauchi , Tsutomu Chou , Kosuke Tanaka , Susumu Aoki , Tetsuya Roppongi , Katsuki Kurihara
- 申请人: Daisuke Miyauchi , Tsutomu Chou , Kosuke Tanaka , Susumu Aoki , Tetsuya Roppongi , Katsuki Kurihara
- 申请人地址: JP Tokyo
- 专利权人: TDK Corporation
- 当前专利权人: TDK Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Frommer Lawrence & Haug LLP
- 主分类号: G11B11/00
- IPC分类号: G11B11/00
摘要:
Provided is a thermally-assisted magnetic recording head capable of setting the near-field light (NFL-) emission point to be sufficiently close to the write-field-generating portion. The head comprises a magnetic pole, a waveguide propagating light, and a NFL-generator coupled with the light in surface plasmon mode. The NFL-generator comprises a propagation edge extending to the NFL-generating end surface, at least a portion of the propagation edge being opposed to the waveguide with a distance, and the magnetic pole has a surface contact with a surface portion of the NFL-generator including no propagation edge. Therefore, the distance between the magnetic-pole end surface and the NFL-generating end surface becomes zero. The propagation edge is not contacted with the magnetic pole. Accordingly, the surface plasmon can propagate along on the propagation edge without being absorbed by the pole. Thus, the NFL-emission point is ensured to be at the end point of the propagation edge.
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