Magnetic recording medium
US4826739A · kind A · utility
4Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1987 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Jul 30, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium comprising a substrate, a magnetic layer provided thereon, a passivated film formed on the surface of said magnetic layer, and a lubricant-containing back-coat layer whose pH is adjusted to 6.3 or more on the back of said substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.