OPTICAL INFORMATION RECORDING MEDIUM

摘要

PURPOSE:To obtain an optical information recording medium causing a slight change of the reflectance due to a variation of the thickness of the recording film, performing satisfactory reproduction and having satisfactory recording sensitivity in spite of its simple two-layered structure not requiring a heat insulating layer or a reflecting layer as an alloy type optical information recording medium fit for high density recording. CONSTITUTION:An amorphous Ge-Sb-Te layer 3 having a compsn. on a line connecting Sb2Te3 and GeTe in a Ge-Sb-Te triangular diagram as a 1st layer and a crystalline Bi-Te layer 4 having 2:3 atomic ratio as a 2nd layer are successively formed as a recording film 2 having a two-layered structure on a transparent substrate 1. A UV-curing resin layer 5 is further formed on the Bi-Te layer 4.