Optical recording disc

Details Optical recording disc Optical recording disc

1992-10-15

1994-11-01

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428913, 430270, 430945, 346 76L, 3461351, B32B 300

Patent

active

053606523

ABSTRACT:
The present invention relates to an optical recording disc comprising two disc bases each having a recording layer formed on one surface side of a substrate bonded to each other by the medium of an adhesive layer with both recording layers facing each other. The adhesive layer, containing an adhesive and a reaction initiator, is hardened through polymerization reaction by the reaction initiator and photopolymerization reaction by ultraviolet-ray irradiation. For this reason, the adhesive layers of both disc bases can be bonded together entirely and uniformly and besides, the adhesive layer can rapidly get hardened, which is advantageous for enhancing productivity of a double-face type optical recording disc.

REFERENCES:
patent: 4716063 (1987-12-01), Uehara et al.
patent: 4729938 (1988-03-01), Tajima et al.
patent: 4821050 (1989-04-01), Yabe et al.
patent: 4954379 (1990-09-01), Nishida et al.
patent: 5227213 (1993-07-01), Komori et al.
Mool C. Gupta, "Laser Recording on an Overcoated Organic Dye-Binder Medium", Applied Optics, vol. 23, No. 22, 1984, pp. 3950-3953.

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