Optical record medium having an improved reflection thin film

Details Optical record medium having an improved reflection thin film Optical record medium having an improved reflection thin film

1989-02-09

1991-10-15

Ro, Bentsu

Dynamic information storage or retrieval

Storage medium structure

Layered

369288, 346137, G11B 724

Patent

active

050580981

ABSTRACT:
An optical information signal record medium which comprises a substance of a desired form having information signals encoded on at least one side thereof, a reflection thin layer of a Cu alloy, and a protective layer formed on the substrate in this order. The reflection thin layer is made of an alloy such as a Cu-Ni alloy, a Cu-Al alloy or a Cu-Ni-Al alloy each having a defined composition.

REFERENCES:
patent: 4195312 (1980-03-01), Bell et al.
patent: 4725502 (1988-02-01), Kiyomiya et al.
Hideaki Ooba, "Optical Information Recording Medium", Patent Abstracts of Japan, vol. 7, No. 121, 58-37851 (May 25, 1983), p. 25 P 199.
World Patents Index, Basic Abstract Japanese 61-133355.

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