Thermally assisted magnetic head, head gimbal assembly, and hard disk drive
US8077556B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2008 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Nov 24, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thermally assisted magnetic head has a medium-facing surface facing a magnetic recording medium; a near-field light generator disposed on a light exit face in the medium-facing surface; a magnetic recording element located adjacent to the near-field light generator; and a light emitting element disposed so that emitted light thereof reaches the near-field light generator; the near-field light generator is comprised of a cusp portion and a base portion; when λin represents a wavelength of the emitted light from the light emitting element immediately before the emitted light reaches the near-field light generator, an intensity of near-field light generated when the material forming the cusp portion is irradiated with the light of the wavelength λin is stronger than an intensity of near-field light generated when the material forming the base portion is irradiated with the light of the wavelength λin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.