Recessing a near field transducer in a heat-assisted magnetic recording head
US8810947B1 · kind B1 · utility
22Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 2013 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | May 30, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recessed near field transducer (NFT) in a heat-assisted magnetic recording head is manufactured by applying Joule heating to the slider to induce a protrusion of materials of and around the NFT and, while applying the Joule heating, removing the protrusion by lapping the slider. Removing the induced protrusion in this manner causes the NFT to recess into the body of the slider at ambient temperature, whereby during HAMR operation when optical power is being applied to a disk via the NFT, the NFT is substantially flush with the slider air bearing surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.