Perpendicular magnetic-recording medium
US4629660A · kind A · utility
13Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Mar 12, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12944
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A perpendicular magnetic-recording medium wherein an amorphous alloy layer of nickel and phosphorus is formed on a disc substrate; the surface of the alloy layer is smoothed with high precision; and a ferromagnetic Co-based perpendicular magnetic-recording layer is formed on the smoothed surface of the alloy layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.