Information recording medium and method for producing the same

Details Information recording medium and method for producing the same Information recording medium and method for producing the same

2005-02-22

2005-02-22

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C428S064500, C428S064600, C430S270130

Reexamination Certificate

active

06858278

ABSTRACT:
An information recording medium which ensures high reliability and favorable overwrite cycle-ability is provided, even when an interface layer is not provided between a recording layer and a dielectric layer. The recording layer4and the dielectric layers2and6are formed on the surface of the substrate1. In the recording layer4, a phase change is generated between a crystal phase and an amorphous phase by irradiation of light or application of an electric energy. The dielectric layers2and6are Zr/Hf—Cr—O-based material layers comprising at least one of Zr and Hf, Cr and O, preferably consisting essentially of material expressed, for example, with the formula (MO2)N(Cr2O3)100−N(mol %) wherein M is either or both of Zr and Hf, and 20≦N≦80.

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