INFORMATION RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a multilayered information recording medium wherein contrast when recording/reproduction is performed by using a blue laser is improved and which has satisfactory reproducing characteristics.

SOLUTION: The information recording medium has a substrate 1, information surfaces of N layers of recording films 3 and 9 wherein information is recorded by change of atomic arrangement generated by irradiation with light (N is an integer of 2 or more) and (N-1) pieces of spacer layers 7. Transmittance of each information surface is so set as to have a relation of information surface 1>information surface 2 ... information surface N-1>information surface N when the information surfaces are counted from a light incident side information surface and the thickness of the substrate is specified to be 0.578 to 0.592 mm and/or the thickness of the spacer layers are specified to be 13 to 27 μm.

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