Optical recording medium and optical recording and reading method using the same
US6558768B2 · kind B2 · utility
13Cited by
4References
16Claims
0Family size
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Inventors
Key dates
| Filing date | Mar 2, 2001 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Mar 2, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium has a substrate and a recording layer formed thereon, the recording layer containing at least one squarylium compound and one azo metal chelate compound including an azo moiety of formula (I-1) or (I-2) and a metal: wherein A, B, A′, and X are the same as those previously defined in the specification. Writing and reading steps are performed by the application of a semiconductor laser beam with a wavelength in a range from 600 to 720 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.