Heat sink for thermally assisted magnetic recording (TAMR)
US8947986B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2014 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Sep 3, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A TAMR head is disclosed wherein a heat sink with a bilayer configuration surrounds the main pole. There is a planar plasmon generator (PPG) with a front peg portion and a larger back portion between a waveguide and a main pole bottom surface. The PPG generates a surface plasmon mode and heats a spot on a magnetic medium during a write process. A first heat sink layer made of Au contacts a back section of the top surface in the PPG back portion to enable efficient dissipation of heat away from the PPG. The second heat sink layer may be Ru and serves as a barrier between the main pole and first heat sink layer to prevent Au migration into magnetic material, and is thermally stable to at least 450° C. to prevent a thermal breakdown of the heat sink material in proximity to the PPG front end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.