Magnetic recording medium
US4540618A · kind A · utility
39Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1983 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | Aug 8, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/254
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording media, e.g. VTR tape is improved by providing an undercoating layer on a polyester film substrate, the undercoating layer being formed under a ferromagnetic thin film and being an even-scattering of a large number of inorganic or organic granules distributed at a rate of 1000/mm.sup.2 or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.