Optical information record member
AssigneeSony Corporation
InventorNoboru Sato
Life of this patent
Estimating the term…
Abstract
An optical information record member having a substrate and an optical information carrier layer formed on the substrate is disclosed. The layer is composed of 40 to 80 atomic % of In and 60 to 20 atomic % of one of Se and S. The layer will be changed into a material which is insoluble to alkaline etchant upon the exposure to a light beam which is modulated in response to information signals to be recorded.
Claims5
An optical information record member, comprising a substrate and an optical information carrier layer formed on said substrate, said layer being composed of 40 to 80 atomic % of In and 60 to 20 atomic % of one of Se and S, said layer being changed into a material which is insoluble to alkaline etchant upon exposure to a light beam modulated according to information signals.
Dependencies are inferred from the claim text.