| 摘要 |
An optical information recording medium comprises a substrate and a multilayered film formed on the substrate, the multilayered film comprising a first information layer, a separating layer, and a second information layer in this order from the side of the substrate. Each of the first information layer and the second information layer comprises a recording layer in which an optical change is caused by irradiation of laser light, and in the first and second information layers, signals can be recorded/reproduced on/from the recording layer by irradiating the recording layer with laser light through the substrate. The first information layer comprises a first protective layer, the recording layer, and a second protective layer in this order from the side of the substrate, and at least one of the first protective layer and the second protective layer comprises at least two layers. The at least two layers comprise a first layer and a second layer in this order from the side near the recording layer. The heat conductivity of a material constituting the second layer is larger than that of a material constituting the first layer.
|
