Heat-assisted magnetic recording (HAMR) medium with thermal barrier layer in multilayered heat-sink structure
US9824710B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2017 |
| Grant date | Nov 21, 2017 |
| Priority date | — |
| Expiry date | May 1, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A heat-assisted magnetic recording (HAMR) medium has a multilayered or laminated heat-sink structure. The laminated heat-sink structure includes a first heat-sink layer and a RuAl—X thermal barrier layer between the medium substrate and the first heat-sink layer. The laminated heat-sink structure may include a second heat-sink layer may between the substrate and the RuAl—X thermal barrier layer. In the RuAl—X thermal barrier layer, X is selected from C and one or more oxides of Si, Ti, W, Zr and Hf. The HAMR medium with the laminated heat-sink structure reduces the amount of required laser current as compared to a similar HAMR medium with a conventional single heat-sink layer of the same thickness, while also slightly improving magnetic properties and recording performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.