Method of making magneto-optical recording medium
US4929320A · kind A · utility
9Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1989 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Jun 19, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10582
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of making a magneto-optical recording medium comprises the step of forming a magneto-optical recording layer on a substrate by simultaneously carrying out direct current sputtering and radio-frequency sputtering. Alternatively, a magneto-optical recording layer composed of thin rare earth metal layers and thin transition metal layers overlaid alternately on a substrate is formed by carrying out radio-frequency sputtering by use of a target formed of a rare earth metal material and direct current sputtering by use of a target formed of a transition metal material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.