Magnetic recording medium
US4770924A · kind A · utility
15Cited by
3References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1987 |
| Grant date | Sep 13, 1988 |
| Priority date | — |
| Expiry date | Jul 2, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magnetic recording medium comprising a magnetic layer in the form of predominantly cobalt ferromagnetic metal thin film on a plastic substrate, physical properties like strength and crack resistance as well as electromagnetic properties of the magnetic layer are improved by forming it as a multi-layered structure consisting of at least two layers, wherein the magnetic layer has a specific profile of oxygen concentration. The medium may be provided with a topcoat and/or backcoat layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.