| 摘要 |
The subject matter of the invention is to provide an optical recording medium with improvements in repeated overwrite characteristics, write power margin, archival stability and the like. The invention provides an optical recording medium having a semi-transparent layer mainly comprising Ag, a first protective layer comprising a dielectric, a phase-change recording layer comprising an alloy mainly comprising SbxTe1-x (0.7<x<=0.9), a second protective layer comprising a dielectric, and a metallic reflective layer in this order, wherein the medium further has an interdiffusion-protection layer between the semi-transparent layer and the first protective layer where the first protective layer comprises a sulfur-containing dielectric, and the medium has a higher reflectance to light incident on the semi-transparent layer side with the recording layer being in an amorphous state than in a crystalline state.
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