CROSS-SUBSTITUTIONAL ALLOYS OF INSB FOR WRITE-ONCE READ-MANY OPTICAL MEDIA

Cross-substitutional alloys of InSb are attractive for novel write-onc e read-many optical media such as CD-R because of the low melting poin t and the phase diagram of the alloys. The low melting point means tha t laser ablation is possible with low power solid state lasers and the two phase material in the alloy phase diagram can be converted irreve rsably into a single phase material. In both cases the reflectivity di fference between the hole and the land and the two-phase and the singl e phase material should be sufficient to make digital recording possib le. This is the first time that these materials have been reported for write-once optical recording.