Process for making a thin film metal alloy magnetic recording disk with a hydrogenated carbon overcoat
US4778582A · kind A · utility
36Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 2, 1987 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jun 2, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C14/16
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A thin film metal alloy magnetic recording disk is manufactured by sputter deposition in an atmosphere consisting essentially of argon and hydrogen. A thin cobalt-based alloy magnetic film and a hydrogenated carbon overcoat are both formed in the same sputtering atmosphere by successive activation of a cobalt-based alloy target and a carbon target. The hydrogen present in the sputtering atmosphere has no adverse effect on the magnetic properties of the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.