Method for producing magnetic recording medium
US4990361A · kind A · utility
7Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Aug 28, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/85
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for producing a magnetic recording medium having an improved durability with a simple process. Nitrogen molecules and/or nitrogen atoms in an excited state are applied to a nonmagnetic substrate simultaneously with an iron vapor flow and an ion flow. The resulting magnetic recording medium has superior corrosion resistance and can be produced at a high film forming rate, and is especially suitable for high density recording because of its high coercive force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.