Invention Grant
- Patent Title: Thermally-assisted magnetic recording head comprising light source with photonic-band layer
- Patent Title (中): 包括具有光子带层的光源的热辅助磁记录头
-
Application No.: US12512249Application Date: 2009-07-30
-
Publication No.: US08194509B2Publication Date: 2012-06-05
- Inventor: Koji Shimazawa , Seiichi Takayama , Tsutomu Chou , Eiji Komura
- Applicant: Koji Shimazawa , Seiichi Takayama , Tsutomu Chou , Eiji Komura
- Applicant Address: JP Tokyo
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP Tokyo
- Agency: Frommer Lawrence & Haug LLP
- Main IPC: G11B11/00
- IPC: G11B11/00

Abstract:
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.
Public/Granted literature
- US20110026377A1 Thermally-Assisted Magnetic Recording Head Comprising Light Source with Photonic-Band Layer Public/Granted day:2011-02-03
Information query
IPC分类: