Optical information recording medium

Details Optical information recording medium Optical information recording medium

1991-06-19

1992-10-13

Hess, B. Hamilton

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428209, 428210, 428432, 428433, 428913, 346 76L, 3461351, 430945, B32B 300

Patent

active

051549573

ABSTRACT:
An optical information medium has a transparent substrate which has a pair of optically smooth faces; a recording thin film which is formed on one of the faces of the substrate and is subjected to an optically detectable change upon irradiation of a laser beam thereon to; and a reinforcing plate which has a mechanical strength larger than that of the substrate.

REFERENCES:
patent: 4564850 (1986-01-01), Kazuhara

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