Optical information recording medium and recording method
US5213955A · kind A · utility
16Cited by
6References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1990 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Apr 27, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical information recording medium comprising a light transmitting substrate, a light absorptive layer containing at least one light absorbing substance formed on the substrate and a light reflective layer made of a metal film formed on the light absorptive layer, wherein an optical parameter represented by .rho.=n.sub.abs d.sub.abs /.lambda. wherein n.sub.abs is the real part of the complex refractive index of the light absorptive layer, d.sub.abs is the average thickness of the light absorptive layer and .lambda. is the wavelength of a reading laser beam, is 0.6<.rho.<1.6.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.