Single-substrate multi-layer optical disk for read-only storage and phase change rewritable storage
US5708653A · kind A · utility
33Cited by
6References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Oct 15, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/237
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk includes a transparent rigid substrate, a phase change rewritable optical recording medium formed on the transparent rigid substrate, a transparent spacer formed on the phase change rewritable optical recording medium and having a grooved surface for storing information, and a reflecting layer formed on the grooved surface of the transparent spacer. The grooved surface of the transparent spacer and the reflecting layer form a read-only recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.