Optical recording medium and recording film material

Details Optical recording medium and recording film material Optical recording medium and recording film material

2011-06-14

2011-06-14

Mulvaney, Elizabeth (Department: 1785)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C428S064500, C428S064600, C430S270130

Reexamination Certificate

active

07960006

ABSTRACT:
A next-generation optical recording medium has two or more information layers which include a translucent information layer. The translucent information layer has a recording film and an interface layer, provided adjacent to the recording film on the side of the light incident surface. The recording film is made of a phase change material having SbxTeyGezelements and elemental ratios. Y satisfies 5≦y≦15 and z satisfies 5≦z≦15. When In having an elemental ratio of a is further added and x+y+z+a=100 holds, a satisfies 4≦a≦15. The interface layer comprises of ZrO2—Cr2O3film thickness of which is in a range of from 2 nm to 10 nm. When ZrO2:Cr2O3═C:D (mol %), the compositional ratios ZrO2and Cr2O3in the ZrO2—Cr2O3film, holds, the C satisfies 20≦C≦90, and the D satisfies 10≦D≦80, and the C and the D satisfy C+D=100. The ZrO2is stabilized ZrO2which contains Y2O3, when ZrO2:Y2O3=(100−X):X (mol %), the compositional ratios ZrO2and Y2O3in the stabilized ZrO2, holds, the X satisfies 2≦X≦10.

REFERENCES:
patent: 7001655 (2006-02-01), Kiyono et al.
patent: 2004/0166440 (2004-08-01), Tabata et al.
patent: 2005/0074694 (2005-04-01), Nishihara et al.
patent: 2007/0148395 (2007-06-01), Shingai et al.
patent: B2 389970 (2007-01-01), None

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