OPTICAL INFORMATION RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide an optical disk which has two layered pigment recording layers and is equipped with sufficient reflectance characteristics and durability to withstand high temperature storage of a first reflection film which is a semi-transparent film in the optical disk.

SOLUTION: The reflectance characteristics and the durability to withstand high temperature storage equivalent to those of a single layer optical disk are obtained by designing light transmittance of the first reflection film to be larger than that of a second reflection film, and constructing the first reflection film with AgBi and the second reflection film with AgGaCuCa.

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