PRODUCTION OF INFORMATION RECORDING MEDIUM

摘要

PURPOSE:To obtain a good-quality recording layer and to permit recording, reading out and erasing from a protective layer side by using glass or metal as a substrate, laminating the recording layer thereon and finally molding the protective layer by an injecting molding or casting method. CONSTITUTION:The information recording medium is constituted by forming the recording layer on the substrate consisting of the glass or metal 1 and finally forming the protective layer 4 by the injection molding or casting method. Recording from the protective layer 4 side. Since the substrate 1 at the time of preparing the recording layer is of the glass or metal, the good-quality recording layer which obviates the deterioration in the film quality by gas release is obtd. Since transparent plastic and resins are used for the molding of the protective layer and medium, the recording reading out and erasing from the protective layer 4 side are permitted and the efficiency of the prepn. is high.