Heat-assisted magnetic recording (HAMR) medium including a bi-layer that enables use of lower laser current in write operations
US9697859B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2016 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Apr 1, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A heat-assisted magnetic recording (HAMR) medium includes a substrate, a bi-layer, a heat-sink layer, and a magnetic-recording layer. The bi-layer includes a seed layer disposed on the substrate, and a thermal-transport-control layer (TTCL) disposed on seed layer. The heat-sink layer is disposed on the TTCL; and the magnetic-recording layer is disposed on the heat-sink layer. The bi-layer is configured to enable use of a 50% thinner heat-sink layer that allows use of a reduced operating current of a laser in HAMR write operations while maintaining about the same write performance parameters as a HAMR medium that includes a thermal-barrier layer (TBL) and twice as thick heat-sink layer. A HAMR data-storage device that incorporates the HAMR medium within a HAMR disk, and a method for making the HAMR medium are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.