| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a phase change type optical recording medium having a refractive index and a signal amplitude practically sufficient, capable of repeating excellent recording and providing a sufficient reliability even when being stored under a high temperature high humidity environment. <P>SOLUTION: In the phase change type optical recording medium wherein at least a first dielectric layer, a recording layer, a second dielectric layer, an intermediate layer, and a reflecting heat dissipation layer are sequentially stacked on a transparent substrate, and the recording layer causes a reversible phase change between an amorphous phase and a crystalline phase through emission of a laser beam to record or erase information, the film thickness of the intermediate layer is selected to be 1 to 10 nm and the thermal conductivity is selected to be 0.03 to 0.3 W/cm-K, or the film thickness of the intermediate layer is selected to be 1 to 10 nm and a complex refractive index and a recording/reproducing wavelength (=n-ik, where n is a real part of the complex refractive index and k is an imaginary part of the complex refractive index) is selected to be 2.5 or over for the n and less than 0.3 for the k. <P>COPYRIGHT: (C)2003,JPO |
