Replicable optical recording medium
US4285056A · kind A · utility
38Cited by
10References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1979 |
| Grant date | Aug 18, 1981 |
| Priority date | — |
| Expiry date | Oct 17, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/165
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium which comprises a light reflective layer, a light transmissive layer and a light absorptive layer, the material comprising the light transmissive layer has a melting, sublimation or decomposition temperature at least 300.degree. C. less than that of the material comprising the absorptive layer. Information is recorded as openings in both the light transmissive and absorptive layers or as bubbles in the absorptive layer. These storage mechanisms produce topographical features which are suitable for replication, thus allowing direct replication of the recorded information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.