Thermally-assisted magnetic recording head having a gap between propagation edge and magnetic pole
US8208349B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2010 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Nov 18, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thermally-assisted magnetic recording head includes a waveguide, a near-field optical device which emits near-field light from a near-field-light-generating end surface that forms a portion of an opposed-to-medium surface, and a magnetic pole generates write field from its end on the opposed-to-medium surface side. The near-field optical device includes a contact-to-waveguide surface, and a propagation edge configured to propagate there on the surface plasmon excited by the light. A gap between a near-field optical device-opposed surface of the magnetic pole and the propagation edge of the near-field optical device is larger at a section far from the end on the opposed-to-medium surface side than that at a section near the opposed-to-medium surface side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.