Magnetic recording medium having an amorphous, nonmagnetic nickel-tungston-phosphorus underlayer
US4735853A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 1986 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | May 15, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a magnetic recording medium in which an underlayer formed below a magnetic medium, in which a signal is written, is composed of a nickel alloy comprising 0.05 to 10 atom % of tungsten and 14 to 30 atom % of phosphorus. In this magnetic recording medium, the temperature for formation of magnetic medium and the temperature for formation of a protective film can be elevated over the levels adopted in the conventional techniques. Therefore, the magnetic characteristics and abrasion resistance can be improved. Furthermore, the magnetic recording medium is excellent in the mechanical strength and corrosion resistance. Accordingly, the reliability of the magnetic medium can be highly improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.