CoCrPtTaNbB alloy for magnetic recording medium
US6562488B1 · kind B1 · utility
4Cited by
10References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2000 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Feb 2, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium on glass or Al substrates with film structures of CrV/NiAl/CrMo/CoCrTa/CoCrPtTaNbB and CrMo/CoCrTa/CoCrPtTaNbB exhibit high coercivity and high signal-to-medium noise ratio. The medium can be used for high-density longitudinal magnetic recording. Embodiments include forming a sub-seed layer on a NiP-plated aluminum substrate, and sequentially depositing a seed layer, an underlayer, an intermediate layer and a magnetic layer on the substrate. The magnetic layer contains at least six elements, including Co, Cr and B.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.