Information recording medium and method for producing the same
First Claim
1. An information recording medium comprising:
- a substrate;
a recording layer wherein a phase change between a crystal phase and an amorphous phase is generated by irradiation of light or application of an electric energy; and
a Zr—
Zn—
S—
O-based material layer comprising Zr, Zn, S and O.
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Accused Products
Abstract
An information recording medium which ensures high reliability and favorable overwrite cyclability is provided, even when an interface layer is not provided between a recording layer and a dielectric layer. The recording layer 4 and the dielectric layers 2 and 6 are formed on the surface of the substrate 1. In the recording layer 4, 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 layers 2 and 6 are Zr—Zn—S—O-based material layers comprising Zr, Zn, S and O, preferably consisting essentially of a material expressed, for example, with the formula (ZrO2)X(Zn—S)100−X (mol %) wherein X is in the range of 50≦X≦80.
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Citations
18 Claims
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1. An information recording medium comprising:
-
a substrate;
a recording layer wherein a phase change between a crystal phase and an amorphous phase is generated by irradiation of light or application of an electric energy; and
a Zr—
Zn—
S—
O-based material layer comprising Zr, Zn, S and O. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for producing an information recording medium which comprises a substrate, a recording layer, and a Zr—
- Zn—
S—
O-based material layer comprising Zr, Zn, S and O, the method comprising a process of forming the Zr—
Zn—
S—
O-based material layer by a sputtering method. - View Dependent Claims (14, 15, 16, 17, 18)
- Zn—
Specification