High stability silver based alloy reflectors for use in a writable compact disk
US5948497A · kind A · utility
49Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1992 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Oct 19, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24273
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A writable compact disk has a plastic substrate, a recording layer, a reflecting layer, and a protective overcoat, the reflecting layer is comprised of a silver-palladium alloy, a silver-copper alloy, or a silver-palladium-copper alloy. By maintaining the palladium component of the alloy less that 15 at. % and the copper component of the alloy less than 30 at. %, the reflectance of the reflecting layer can be similar to the typical gold reflecting layer while jitter and NORP levels can be reduced for illumination power levels exceeding the power normally used to write on the recording layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.