| 摘要 |
PURPOSE:To prevent the thermal damage of a substrate and to enable the repetitive execution of good reproducing by providing dielectric layers having the thermal conductivity on the substrate side higher than the thermal conductivity on the optical recording layer side between the substrate and the optical recording layer. CONSTITUTION:This optical recording medium has the dielectric layers 1 constituted of two layers. The thermal conductivity of the first dielectric layer 3 on the substrate 2 side is higher than the thermal conductivity of the second dielectric layer 5 on the optical recording layer 4 side. The optical recording layer is effectively heated up and the heat conduction from the optical recording layer to the substrate is suppressed when such dielectric layers are provided. Then, the thermal damage of the substrate is prevented at the time of recording even in the case the optical recording medium has the optical recording layer for which high-temp. thermal recording is required. The good signal recording is thus executed. |
