Heat-assisted magnetic recording (HAMR) write head with protective film for near-field transducer
US8902720B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2014 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Apr 17, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A heat-assisted magnetic recording (HAMR) head has a protective film confined to a window of the disk-facing surface of the slider than surrounds the near-field transducer (NFT) and write pole end. Materials for the protective film include TiO2, ZrO2, HfO2, Nb2O5, Ta2O5, Sc2O3, Y2O3, MgO SiN, BN, SiBN and SiBNC. The slider overcoat is located in the non-window region on the slider's disk-facing surface and optionally also on the window region, with the outer surface of the overcoat forming the slider's ABS. An optional recess may be formed on the disk-facing surface of the slider in the window region, with the protective film located in the recess.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.