Read-only optical disk containing a reflective layer comprising

Dynamic information storage or retrieval – Storage medium structure – Optical track structure

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369288, 430945, G11B 724, G11B 700

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active

052766730

ABSTRACT:
Disclosed herein is a read-only optical disk comprising an annulus transparent substrate of a synthetic resin having information pits thereon, a reflective layer comprising an Al alloy containing Ta and a protective layer provided thereover. The read-only optical disk according to the present invention is excellent in the corrosion resistance and has a high reliability.

REFERENCES:
patent: 5013594 (1991-05-01), Mizumura et al.
patent: 5155723 (1992-10-01), Hamada et al.
patent: 5215799 (1993-06-01), Sakoda et al.
Patent Abstracts of Japan, unexamined applications, P field, vol. 11, No. 26, Jan. 24, 1987 The Patent Office Japanese Government p. 48 P 539 *Kokai-No. 61-196 444 (Toshiba Corp.).
Patent Abstracts of Japan, unexamined applications, P field, vol. 11, No. 26, Jan. 24, 1987 The Patent Office Japanese Government p. 49 P 539 *Kokai-No. 61-196 445 (Toshiba Corp).*
Patent Abstracts of Japan, unexamined applications, P field, vol. 14, No. 207, Apr. 26, 1990 The Patent Office Japanese Government p. 6 P 1043 *Kokai-No. 2-44 544 (Matsushita Electric Ind. Co. Ltd.).

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