Polyester substrate for magnetic recording medium having oligomer protrusions thereon
US4514451A · kind A · utility
18Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1983 |
| Grant date | Apr 30, 1985 |
| Priority date | — |
| Expiry date | Jul 18, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31681
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording media comprises a polyester substrate having 1000/mm.sup.2 or more protrusions of polyester oligomer, and a ferromagnetic thin film of 400 .ANG. or larger thickness both formed on the surface of the polyester substrate; the recording media has substantially no squealing even at 30.degree. C. at over 80% relative humidity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.