Invention Grant
- Patent Title: Thermally assisted magnetic head having a semiconductor surface-emitting laser
- Patent Title (中): 具有半导体表面发射激光器的热辅助磁头
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Application No.: US12363010Application Date: 2009-01-30
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Publication No.: US08000175B2Publication Date: 2011-08-16
- Inventor: Koji Shimazawa , Eiji Komura , Seiichi Takayama
- Applicant: Koji Shimazawa , Eiji Komura , Seiichi Takayama
- Applicant Address: JP Tokyo
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oliff & Berridge, PLC
- Main IPC: G11B11/00
- IPC: G11B11/00

Abstract:
A thermally assisted magnetic head includes: a slider having a medium-facing surface; and a surface-emitting semiconductor laser. The slider has: a slider substrate, on which part of the medium-facing surface is formed; and a magnetic head portion, on which another part of the medium-facing surface is formed, and which has a first surface in contact with a head stacking surface of the slider substrate and a second surface opposite the first surface. The magnetic head portion has: a main magnetic pole that generates a write magnetic field from an end face on the side of the medium-facing surface; an optical waveguide core extending along the first surface and having a light exit surface at the medium-facing surface; and a diffraction grating, which is provided in the optical waveguide core or further towards the second surface than the optical waveguide core, and the refractive index of which varies periodically along the direction in which the optical waveguide core extends. The surface-emitting semiconductor laser is provided opposing the second surface so that emission light from the surface-emitting semiconductor laser is incident onto the diffraction grating, and the diffraction grating causes at least part of emission light from the surface-emitting semiconductor laser to be optically coupled to the optical waveguide core.
Public/Granted literature
- US20100195238A1 THERMALLY ASSISTED MAGNETIC HEAD HAVING A SEMICONDUCTOR SURFACE-EMITTING LASER Public/Granted day:2010-08-05
Information query
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