Method of producing optical recording medium
US4659588A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1984 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Jun 26, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/2432
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method of producing an optical recording medium containing a thin film photosensitive layer provided on a board. When subjected to an optical energy, the optical density of this thin film photosensitive layer varies. Such optical recording medium is formed by the method of (a) mixing tellurium dioxide TeO.sub.2 and a reducing substance or substances, (b) heating the obtained mixture and causing part of the TeO.sub.2 to react with the reducing substance to obtain a sintered body and (c) obtaining a TeO.sub.2 compound thin film photosensitive layer on a board by evaporation and deposition, using the sintered body obtained in steps (a) and (b) as the vacuum deposition source. The optical recording medium possessing such a TeO.sub.2 compound thin film photosensitive layer may be used as both a one-time recording type medium and as an erasable type medium, capable of erasing the previously recorded information and recording new information in its place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.