Optical information recording medium using azo dyes
US5272047A · kind A · utility
14Cited by
9References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1992 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | Jun 26, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is disclosed a recordable optical element that includes a metallized dye. The element has a transparent substrate and on the surface of the substrate, a dye containing recording layer and a light reflecting layer. The improvement is that the dye is a metal complex of a tridentate azo dye ligand containing, on one side of the azo linkage, an aminohydroxypyridine group and on the other side, an aromatic ring including an electron withdrawing substituent. The dyes that are used in the element are very light stable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.