| 摘要 |
An optical information recording medium includes a dielectric layer and an Ag-based reflection layer or an Ag-based metal semitransparent layer adjacent to the dielectric layer. The dielectric layer contains niobium oxide between 50 mol % and 75 mol %, zinc sulfide between 10 mol % and 30 mol %. The dielectric layer further contains an additive which is at least one of or a mixture of at least two of the following materials: aluminum oxide, tantalum oxide, silicon oxide, cerium oxide, yttrium oxide, hafnium oxide and bismuth oxide. By this structure layers, an Ag-based reflection layer or Ag-based metal semitransparent layer can apply to a phase-change optical disc without requiring a layer for preventing the Ag-based layer from sulfurization. An optical information recording medium having high productivity can be provided.
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