Thermally assisted magnetic head with optical waveguide
US8023225B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2008 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | Mar 9, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
While an emitting position of light from an optical waveguide and a magnetic pole end part are made closer to each other, high-density writing onto a magnetic recording medium is realized.A thermally assisted magnetic head comprises a main magnetic pole layer having a magnetic pole end part exposed at a medium-opposing surface opposing a magnetic disk, and an optical waveguide for deflecting laser light incident thereon into a laminating direction. The main magnetic pole layer is positioned on a side where the light is deflected by the optical waveguide. The magnetic pole end part projects to the side where the light is deflected by the optical waveguide. The optical waveguide projects more than the magnetic pole end part on the medium-opposing surface side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.