Method for manufacturing a thin film magnetic recording medium
US4749459A · kind A · utility
20Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1986 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Mar 10, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/851
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A film of magnetic recording media is formed by sputtering an alloy of cobalt and platinum onto a substrate. The sputtering takes place in a chamber containing argon and nitrogen. The magnetic coercivity of the resulting film is controlled by varying the concentration of nitrogen in the sputtering chamber. By using this technique, the film coercivity is controlled without varying other important parameters such as the saturation magnetization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.