Optical information storage material and method of making it

摘要

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 GeOx1, SnOx1, SbOx2, TlOx2, BiOx2 or MoOx3 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 GeO2, SnO2, Sb2O3, Tl2O3, Bi2O3 or MoO3 under deoxidization conditions.