Method for manufacturing an optical information recording medium

Details Method for manufacturing an optical information recording medium Method for manufacturing an optical information recording medium

1997-12-02

1999-06-22

McPherson, John A.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

43027011, 430945, 369284, 20419226, G11B 724, G11B 726

Patent

active

059142146

ABSTRACT:
A method for manufacturing an optical information recording medium having an excellent mechanical strength, thermal stability, and improved overwrite cycle property can be provided by forming the dielectric layer by using a mixed target comprising ZnS and SiO.sub.2 in an atmosphere comprising rare gas and at least oxygen at the side where the dielectric layer does not contact to the recording layer. The optical information recording medium is manufactured by using the substrate, the recording layer comprising a material that varies reversibly between the optically identifiable states by an irradiation of a laser beam, and the dielectric layer at least one side of which has a two-layered structure at the upper and lower sides of the recording layer. At least one of the dielectric layers that does not contact to the recording layer is formed by using a mixed target comprising ZnS and SiO.sub.2 in a mixed atmosphere comprising rare gas and oxygen.

REFERENCES:
patent: 5453346 (1995-09-01), Kawamara et al.
T. Kurumizawa et al., "New Protective Layer for an Optical Disk", The Japan Society of Applied Physics and Related Society (extended abstracts), 28p-ZQ-3, p. 839 (English translation) (1988).

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