Optical disc
US4719171A · kind A · utility
18Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1987 |
| Grant date | Jan 12, 1988 |
| Priority date | — |
| Expiry date | Mar 30, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disc comprises a substrate formed from a polymer being capable of the anisotropic melt phase and being melt-processable, a recording layer having pits and grooves, formed on the substrate, and a metal coating layer, formed on the recording layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.