| 摘要 |
High temperature reliability, and in particular, the high temperature reliability after repeated overwriting operations is improved in an optical recording medium wherein a material of Ag-In-Sb-Te system is used for the recording layer. Provided is an optical recording medium having a recording layer of phase change type, wherein said recording layer contains Ag, In, Sb, and Te as its main components, and Ge as its sub-component such that, when molar ratio of the elements constituting the main and sub-components is represented by formula (I): (AgaInbSbcTed) (1-e/100)Gee, 2<=a<=20, 2<=b<=20, 35<=c<=80, 8<=d<=40, a+b+c+d=100, and 1<=e<=15.
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