Dye mixtures for optical recording layers
US5500325A · kind A · utility
16Cited by
12References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1995 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | Jan 23, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dye mixture is disclosed. The mixture is useful in recording layers of optical recording elements. The mixture has: a) a real index of refraction of at least 1.8 in the 780 to 790 nm region of the spectra; b) an imaginary index (k) between 0.3 and 0.02 in the 780 to 790 nm region of the spectra; c) a metallized azo dye comprising an azo group linking a substituted 3-hydroxy-pyridine nucleus to a phenyl nucleus wherein the phenyl nucleus has an alkoxy or thioether substituent at its 2-position; and d) at least a second dye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.