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US 4,397,923 AGranted
Method of manufacturing an optical recording element
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorsNobuaki Yasuda, Yoshinori Fujimori, Masaaki Morita
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Abstract
An optical recording element which comprises a heat-resistant organic resin substrate; a recording layer formed on said substrate by thermal deposition or sputtering; and a transparent organic resin protective layer mounted on the recording layer, and wherein the organic resin substrate and organic resin protective layer are thermally fixed under pressure with the recording layer laid between them.
Claims4
A method of manufacturing an optical recording element, which comprises the steps of:
- preparing a heat-resistant organic resin substrate sheet;
- taking said substrate sheet into a vacuum chamber;
- forming a recording layer on said substrate sheet by sputtering in said vacuum chamber;
- preparing a transparent organic resin protective sheet having a softening point less than or equal to the softening point of said heat-resistant organic resin substrate sheet;
- taking said protective sheet into said vacuum chamber;
- thermally pressing said protective sheet against said recording layer in said vacuum chamber to form a thermally laminated sheet mass;
- taking said thermally laminated sheet mass out of said vacuum chamber;
- and
- cutting said thermally laminated sheet mass into a prescribed form.
6 more elements
Dependencies are inferred from the claim text.