Magnetic recording medium having a perfluoropolyether lubricant bonded to the surface of a carbon protective film
US5858536A · kind A · utility
29Cited by
9References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1994 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Aug 24, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31544
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A magnetic storage medium includes a substrate, a protective film, and a lubricant film. The substrate includes a magnetic body. The protective film is formed on the substrate and constituted by a carbon thin film having dangling bonds formed on a surface thereof. The lubricant film is coated on the protective film and bonded to some of the dangling bonds. An adsorption site ratio (density of dangling bonds/density of functional groups of lubricant film) which is a ratio of the density of the dangling bonds to the density of functional groups of the lubricant film exceeds 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.