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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHiroyuki Ohta, Yoshitaka Sakaue, Eiji Ohno, Noboru Yamada
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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.
A method for manufacturing an optical information recording medium comprising a recording layer that comprises a material that changes reversibly between optically identifiable states by irradiation with a laser beam and a first protective layer comprising a first dielectric layer that is spaced from the recording layer, and a move inhibiting layer provided between the first dielectric layer and the recording layer the method comprising:
A method for manufacturing an optical information recording medium comprising a recording layer that comprises a material that changes reversibly between optically identifiable states by irradiation with a laser beam and a first protective layer comprising a first dielectric layer that is spaced from the recording layer, the method comprising:
An optical information recording medium, comprising:
An optical recording medium comprising:
Dependencies are inferred from the claim text.