Optical information storage material and method of making it
US4091171A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1976 |
| Grant date | May 23, 1978 |
| Priority date | — |
| Expiry date | Nov 18, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/913
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical information storage material having a substrate and a film deposited on the substrate, the state of said material can be changed from a low optical density state to a high optical density state by the application of electrical, optical or thermal energy. The major component of the film is GeO.sub.x1, SnO.sub.x1, SbO.sub.x2, TlO.sub.x2, BiO.sub.x2 or MoO.sub.x3 wherein 0 < x1 < 2.0, 0 < x2 < 1.5 and 0 < x3 < 3.0. The film can be a mixture of above-mentioned material and an additive for improving the properties thereof. The material is made by vacuum evaporating GeO.sub.2, SnO.sub.2, Sb.sub.2 O.sub.3, Tl.sub.2 O.sub.3, Bi.sub.2 O.sub.3 or MoO.sub.3 under deoxidization conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.