Thermally assisted recording head with magnetic pole integrated into optical aperture for dual gradient recording
US7652954B2 · kind B2 · utility
13Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 2008 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Jul 29, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A write head structure for perpendicular recording having a pole tip integrated into the metal film surrounding a C aperture near field light source is disclosed. The close proximity of the pole tip to the light source enables more precise location of data cells written into the magnetic media, through the use of dual gradient thermally assisted recording. In dual gradient recording, data is fixed by the effect of both a thermal gradient, which affects the coercivity of the magnetic media, combined with a magnetic field gradient imposed by the pole tip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.