Optical information phase change recording medium having double protective layer
US4984231A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1988 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Jan 22, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical information recording carrier which comprises an information recording film susceptible to a change in atomic arrangement upon exposure to a recording beam, a first transparent film for preventing diffusion of heat generated in the recording film upon exposure to the recording beam and provided on each side of the recording film, a second transparent film for diffusing the heat in the in-plane direction of the film and provided on at least one outside thereof, and an organic member further provided on at least one outside thereof, the recording beam being irradiated onto the recording film through the organic member has distinguished characteristics of repeated recordings and erasings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.