Recording medium having optomagnetic recording layer and optical recording layer with guide tracks of specific reflectance
US4737947A · kind A · utility
27Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1984 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Jun 11, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12639
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium comprising a substrate, an optomagnetic recording layer made of a magnetic film where information can be recorded and reproduced by irradiation with a light beam, and an optical recording layer which can be modified in optical properties to form guide tracks when information is recorded in or reproduced from the optomagnetic recording layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.