Optical information recording method and medium
US5155723A · kind A · utility
21Cited by
23References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1989 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Apr 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/2595
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for optically recording information on an optical information recording medium comprising a light transmitting substrate, a light absorptive layer overlaying the substrate to absorb a laser beam and a light reflective layer overlaying the light absorptive layer, which comprises energizing the light absorptive layer by a laser beam entered through the light transmitting substrate, and locally deforming, by the energy thereby generated by the light absorptive layer, a surface layer of the substrate adjacent to the light absorptive layer, to form optically readable pits in the surface layer of the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.