Magnetic recording medium
US4547419A · kind A · utility
15Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1984 |
| Grant date | Oct 15, 1985 |
| Priority date | — |
| Expiry date | Jul 18, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/256
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium which comprises a plastic base film and a magnetic layer formed on one side of the base film and composed of a ferromagnetic alloy powder dispersed in a resin binder, characterized in that said ferromagnetic alloy powder has a surface area of at least 48 m.sup.2 /g measured by BET method, said magnetic layer has a coercive force of at least 1,000 Oe and a surface roughness of at most 0.08 .mu.m, and a radiation-cured backing layer made of a radiation sensitive resin and having a surface roughness of from 0.05 to 0.6 .mu.m is formed on the other side of the base film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.