UTILISATIONS D'OXYDES SPINELLES OXYDABLES COMME MATERIAUX POUR COUCHE SENSIBLE D'UN SUPPORT OPTIQUE ENREGISTRABLE UNE SEULE FOIS

摘要

The present invention relates to a method of recording data in digital form on a write-once read-many optical medium comprising a sensitive film based on a metal oxide of the oxidizable spinel type. Regions of the sensitive film are heated, locally and in succession, under conditions allowing oxidation of the oxidizable metal ions of the oxide. In the optical medium thus recorded, the virgin regions, which are not modified by the write operation, are oxidizable and change color after heat treatment in an oxidizing atmosphere.