Optical recording medium

Details Optical recording medium Optical recording medium

1991-11-26

1993-08-24

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428457, 428913, 430945, 346 76L, 3461351, B32B 300

Patent

active

052387224

ABSTRACT:
An optical recording medium is composed of a substrate, a recording layer containing an inorganic material which includes as the main component a sulfide of at least one element selected from the group consisting of the elements of IIb, IIIb, IVb, Vb, and VIb groups, which is formed on the substrate, with a complex index of refraction of (n-ik), where n.gtoreq.1.8, and k.ltoreq.0.3, and a reflection layer formed on the recording layer. In this invention, an intermediate layer can be interposed either between the substrate and the recording layer, or between the recording layer and the reflection layer.

REFERENCES:
patent: 4188214 (1980-02-01), Kido et al.
patent: 4358780 (1982-11-01), Sato
patent: 4879205 (1989-11-01), Suzuki
patent: 4899168 (1990-02-01), Osato et al.
U.S. patent application Ser. No. 07/577,877, filed Sep. 5, 1990, T. Yashiro et al.; U.S. Pat. No. 5,169,745 to issue Dec. 8, 1992.

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