| 摘要 |
PURPOSE:To obtain an optical disk which is free from the recording/ reproduction errors of information despite the long-time storage of the disk, by providing a dew condensation layer in addition to a recording layer on a substrate at the side of a hollow part. CONSTITUTION:A dew condensation layer 20 is provided on a substrate 1 at the side opposite to a hollow part 3. The layer 20 uses a material larger in heat diffusivity than a recording layer 2. Thus the dew is produced on the layer 20 when an optical disk is cooled suddenly. In such a way, the generation of dew on the layer 2 is prevented. As a result, no recording/reproduction error is produced with information. |
