Use of anthracyanine and phenanthracyanine chromophores in optical information media
US4783386A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Jan 12, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/231
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is an optical information recording medium and a method of recording information thereon. The information layer of the recording medium comprises an anthracyanine or phenanthracyanine chromophore compound. In a preferred embodiment, the chromophore is substituted with at least one substituent conferring film forming properties to the chromophore, e.g., a monomer or oligomeric substituent comprised of acid, amide or ester units. The resulting information layer exhibits strong absorption in the range of from about 780-850 nm. Employing an anthracyanine or phenanthracyanine chromophore substituted with a film forming substituent further offers the advantages of a single component material exhibiting good thermomechanical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.