OPTICAL INFORMATION RECORDING MEDIUM

摘要

PURPOSE:To obtain a phase change-type optical recording medium capable of recording and regenerating information at high speed and high packing density and deleting information rapidly with excellent repeatability properties by providing an optical recording layer consisting of a blend of a phase change recording material which changes a phase between a crystal material and an amorphous material reversibly and an inorganic dielectric on a transparent substrate. CONSTITUTION:The subject optical information recording medium consists of an optical recording layer 3 provided on a transparent substrate 1, and records and deletes information through a reversible change of an optical constant by irradiation of the optical recording layer 3 with an energy beam. The optical recording layer is composed of a blend of a phase change recording material 7 which changes reversibly between a crystal material and an amorphous material such as Sb-Te-Ge. The content of the phase change recording material 7 in the optical recording layer 3 is 20 to 80% based on the capacity of the layer 3. Thus the migration of the materials in the optical recording layer due to the repeated process of recording and deletion is significantly reduced and the reliability of repeatedly recorded data is remarkably enhanced.