2-LAYER TYPE OPTICAL RECORDING MEDIUM AND RECORDING/REPRODUCING METHOD THEREFOR, AND OPTICAL RECORDING/REPRODUCING DEVICE

摘要

A 2-layer type optical recording medium of a one-sided 2-layer recording/reproducing type capable of obtaining good recording signal characteristics from two pigment-containing recording layers and a recording/reproducing method therefore, and an optical recording/reproducing device. The recording medium comprises a first substrate, a second substrate, and, between the first and second substrates, a first information layer, an intermediate layer and a second information layer, and allows a laser beam to enter from the first substrate side to at least record or reproduce information, wherein the first information layer has at least a first pigment-containing recording layer and a first reflection layer in the order mentioned from a laser beam incident side, the second information layer has at least a second pigment-containing recording layer and a second reflection layer in the order mentioned from a laser beam incident side, the first reflection layer contains either one of Au, Ag, and Cu, and an alloy containing at least one type selected from Au, Ag, Cu, Al, Ti, V, Cr, Ni, Nd, Mg, Pd, Zr, Pt, Ta, W, Si, Zn and In, the light transmittance of the first information layer is 15-60%, and the light reflectance of the first information layer is 15-50%.