Super high density magnetic recording medium
US4489117A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1982 |
| Grant date | Dec 18, 1984 |
| Priority date | — |
| Expiry date | Aug 30, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31797
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A super high density magnetic recording medium is provided, which comprises a polyester film and a discontinuous film formed on at least one surface of the polyester film. The discontinuous film has a thickness of smaller than 500 angstroms and is composed mainly of a water-soluble polymer, a silane coupling agent, and if desired, a silicone resin. A high density magnetic recording medium is also provided, which comprises a ferromagnetic metal thin film formed on the discontinuous film layer of the polyester base film. The polyester base film is especially suitable for formation of a metallized video tape, and this tape is excellent in the slip characteristics and abrasion resistance and advantageous in that noises and drop-out are reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.