Magnetic recording medium with a chromium alloy underlayer and a cobalt-based magnetic layer
US4652499A · kind A · utility
60Cited by
2References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1986 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Apr 29, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12944
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved cobalt-platinum (CoPt) thin film metal alloy media for horizontal magnetic recording has a squareness greater than prior CoPt thin film metal alloy media. An underlayer of a body-centered-cubic (BCC) chromium-based alloy with a lattice cell constant greater than chromium (Cr), such as chromium-vanadium (CrV), is formed between the substate and the CoPt magnetic layer. The underlayer also improves the magnetic properties of the media when the magnetic layer is an alloy of cobalt-platinum-chromium (CoPtCr).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.