Magnetic recording medium and method for making
US4596735A · kind A · utility
29Cited by
8References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1984 |
| Grant date | Jun 24, 1986 |
| Priority date | — |
| Expiry date | Apr 25, 2004 |
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 comprising a non-magnetic substrate and a magnetic layer of Co or Co-Ni in the form of a continuous thin film on the substrate, the magnetic layer has oxygen-rich sub-layers at its surfaces adjacent to and remote from the substrate. The oxygen-rich sub-layers are produced by injecting energy particles containing oxygen to the surface of the substrate during the initial and final stages of formation of the magnetic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.