发明授权
- 专利标题: Thermally-assisted magnetic recording head comprising light source with photonic-band layer
- 专利标题(中): 包括具有光子带层的光源的热辅助磁记录头
-
申请号: US12512249申请日: 2009-07-30
-
公开(公告)号: US08194509B2公开(公告)日: 2012-06-05
- 发明人: Koji Shimazawa , Seiichi Takayama , Tsutomu Chou , Eiji Komura
- 申请人: Koji Shimazawa , Seiichi Takayama , Tsutomu Chou , Eiji Komura
- 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:
A thermally-assisted magnetic recording head is provided, in which a light source having sufficiently high output power for performing thermal-assist is disposed in the element-integration surface of the substrate to achieve improved mass-productivity. The head includes: a light source having a multilayered structure including a photonic-band layer and having a light-emitting surface opposed to the element-integration surface; a diffraction optical element that converges the emitted light; a light-path changer that changes the direction of the converged light; a waveguide that propagates the direction-changed light toward the opposed-to-medium surface; and a magnetic pole that generates write field. The surface-emitting type light source includes a photonic-band layer having a periodic structure in which a light from an active region resonates, and thus emits laser light on a quite different principle from a VCSEL. Therefore, the light source can be disposed in the element-integration surface, even though having sufficiently high output power.
公开/授权文献
信息查询
IPC分类: