Heat-assisted magnetic recording (HAMR) write head with recessed near-field transducer and optically transparent protective film
US9036307B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2014 |
| Grant date | May 19, 2015 |
| Priority date | — |
| Expiry date | Oct 9, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A heat-assisted magnetic recording (HAMR) air-bearing slider has an optically-transparent protective film over the near-field transducer (NFT) to protect the NFT from excessive heat caused by the accumulation of carbonaceous material on the slider's overcoat. The NFT is thus separated from the overcoat by the protective film. The protective film does not cover the write pole end, which is covered only by the overcoat, so there is no spacing loss between the write pole end and the recording layer on the disk. In one embodiment the protective film is coplanar with the recording-layer-facing surface of the slider and the overcoat covers both the protective film and the write pole end. In another embodiment the overcoat has a window that surrounds the protective film, with the protective film being substantially coplanar with the air-bearing surface (ABS) of the slider. In both embodiments the smooth topography of the slider's ABS is maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.