Rhodium film with thin template layer and its application to a thermally assisted magnetic recording (TAMR) writer
US10586560B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2019 |
| Grant date | Mar 10, 2020 |
| Priority date | — |
| Expiry date | Mar 5, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A PMR (perpendicular magnetic recording) head is configured for thermally assisted magnetic recording (TAMR). The thermal energy is supplied by the near-fields of plasmons and the near-fields are directed to a magnetic recording medium by a PPG layer. The PPG layer is Rhodium (Rh) whose small-grained crystal structure normally makes it subject to thermal deformations and other weaknesses. By growing the PPG layer on a thin template layer (TTL), the portion of the PPG layer adjacent to the air-bearing surface (ABS) develops a larger grain size and stronger forces between its atomic constituents which makes it resistant to those deformations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.