Magnetic recording medium
US4889767A · kind A · utility
26Cited by
8References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1987 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Apr 23, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magnetic recording medium wherein a metal thin film magnetic layer and a topcoat layer of an organic fluorine compound are formed on a nonmagnetic substrate, the surface of the magnetic layer is plasma treated or plasma oxidized, enhancing the bond between the adjoining layers. A protective film of carbon may be disposed between the magnetic layer and the topcoat, with the surface of the protective carbon film plasma treated. Instead, a protective film of plasma-polymerized organometallic compound may be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.