Magnetic recording medium
US4844978A · kind A · utility
1Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1985 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Nov 6, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magnetic recording medium comprising a substrate, a ferromagnetic metal thin film formed on the substrate, and a topcoat formed on the thin film, the topcoat is a plasma-polymerized film containing carbon and hydrogen in an atomic ratio of C/H of from 1 to 6, and having a thickness of 10 to 40 angstroms and a contact angle with water in the range of from 60.degree. to 130.degree..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.