Optical information recording medium

Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier

Patent

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Details

428 65, 428192, 428913, 369277, 369284, 369288, 346 76L, 3461351, 430945, B32B 302

Patent

active

052021718

ABSTRACT:
An optical information recording medium is manufactured by a so-called photopolymerization process. The medium comprises a glass substrate and a layer of ultraviolet ray setting resin having a surface which is a replica of a stamper. Concentric recesses are formed at the outer and inner peripheral edges of the glass substrate to receive an excess resin to avoid any formation of a bur on the finished disk medium.

REFERENCES:
patent: 4802160 (1989-01-01), Yamada

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