INFORMATION RECORDING MEDIUM AND INFORMATION MEMORY DEVICE

摘要

PROBLEM TO BE SOLVED: To enable rewriting or super-high resolution reading out a large number of times than heretofore while maintaining good recording and reproducing characteristics or super-high resolution reading out characteristic. SOLUTION: A reflection layer is formed to a two-layered structure consisting of a layer 5 essentially consisting of So and a layer 65 essentially consent of a metallic material and Al oxide is used for at least part of the upper and lower dielectric layers of a recording film 3, by which the fluctuation in the reflection level, the increase or reproducing signal jitters, etc., are suppressed when many times of rewriting or super-high resolution reading out is executed. Many times of rewriting or super-high resolution reading out is thus made possible.