Optical recording medium containing carboxylic acid-base metallic complex and squarylium-base or croconium-base dye
US5190849A · kind A · utility
16Cited by
9References
8Claims
0Family size
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Key dates
| Filing date | Oct 11, 1990 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Oct 11, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium contains at least one squarylium- or croconium-base dye of formulae [I] or [II], and a carboxylic acid-base metallic complex: ##STR1## where A.sym. is a cationic bivalent organic residue and B is a monovalent organic residue. The optical recording medium has an absorption band for light in the long wavelength region and is superior in stability against heat and light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.