OPTICAL INFORMATION RECORDING MEDIUM AND METHOD FOR PRODUCING SAME

摘要

The information recording medium 3 comprises an information layer having a metal layer 5 on a substrate 4, wherein concavo-convex portion is formed in the substrate to give main information such as image and voice, and the metal layer contains Al, Si and M (wherein M is at least one element selected from a group consisting of Cr and Ni) and enables sub-information to be additionally recorded therein at low cost by laser-beam 7 irradiation.