Overcoat for particulate magnetic recording disk
US4737419A · kind A · utility
7Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Feb 13, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Carbon is sputter-deposited as a protective overcoat on the coating of a magnetic recording disk of the type in which the coating includes magnetic particles dispersed in an organic binder. The carbon film exhibits excellent durability and lubricity, thereby eliminating the need to incorporate alumina or other load-bearing particles into the magnetic coating, and eliminating the need for a liquid lubricant on the disk surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.