Optical recording media

Details Optical recording media Optical recording media

G - Physics

03

G

96/74

G03G 5/00 (2006.01) C01B 19/00 (2006.01) C01G 17/00 (2006.01) C01G 37/00 (2006.01) G11B 7/243 (2006.01)

Patent

CA 2011590

ABSTRACT In accordance with the present invention, there are provided optical recording media having a substrate and thereon a recording layer and designed to record information by varying optical constants of part of the recording layer by means of irradiation of energy beam. The recording layer contains Te, Ge and Cr. or Te, Ge and Zn, wherein the amount of Cr is 1-30 atom% based on the total amount of atoms constituting the recording layer, and the proportion of Te, Ge and Zn atoms contained in the recording layer are represented by the formula (TexGe100-x)100-yZny wherein x is 20?x? and y is 20<y?70. In the optical recording media thus provided, the contrast ratio before and after irradiation of recording laser beam is sharply improved and C/N at the time of reproducing the recorded information improves and, at the same time, the increased and accordingly the optical recording media are prolonged in duration of life.

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