Thin film magnetic disk with CoPtCrB layer
US6187408A · kind A · utility
6Cited by
4References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1997 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Apr 8, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin film magnetic disk (and a disk drive using the magnetic disk) with improved recording performance having a thin seed layer consisting of tantalum (Ta), a suitable underlayer and a CoPtCrB magnetic layer is described. The underlayer is preferably a Cr alloy with a grain size which is smaller than that of pure Cr. CrTi is suitable as an underlayer. An appropriate overcoat such as hydrogenated carbon can be applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.