Magnetic record member
US4307156A · kind A · utility
29Cited by
9References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1979 |
| Grant date | Dec 22, 1981 |
| Priority date | — |
| Expiry date | Jun 12, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved magnetic record member having a nonmagnetic disk base with a mirrored surface, a magnetic-metal thin-film medium formed on the disk base; an intermediate layer composed of an oxide of a magnetic metal, a chromium oxide, or a phosphate formed on the film medium; and a layer of polysilicate or a metal alcoxide hydrolysis polymer formed on the intermediate layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.