Magnetic recording member
US5069983A · kind A · utility
7Cited by
6References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1989 |
| Grant date | Dec 3, 1991 |
| Priority date | — |
| Expiry date | Sep 29, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12854
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording member having high coercive force, comprising: PA0 (a) a non-magnetic substrate; PA0 (b) a Cr base film formed on said substrate by a film forming process; and PA0 (c) a Co alloy film formed on said Cr base film by the same film forming process as in (b), PA0 wherein said Cr base film contains in addition to Cr at least one additional element selected from the group consisting of rare earth elements, Si, Cu, P and Ge, and wherein said Co alloy film is formed by continuous operation of said film forming process without interruption after completion of the formation of said Cr base film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.