Optical recording medium containing meta-position aluminium-type IR-ray absorptive compound
US5024917A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1989 |
| Grant date | Jun 18, 1991 |
| Priority date | — |
| Expiry date | Nov 22, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/165
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides an IR-ray absorptive compound having a specific structural formula and an optical recording medium. The IR-ray absorptive compound has excellent characteristics that absorption in the infrared region is large and improved in solvent solubility. In corporation of the IR-ray absorptive compound into a thin film containing an organic coloring matter of an optical recording medium has remarkably improved the storage stability and the light resistance of the medium. Further the high solubility in solvents prevents formation of a solid in the recording layer, whereby the optical recording medium having a low noise level can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.