Optical disc and method of manufacturing

Details Optical disc and method of manufacturing Optical disc and method of manufacturing

1984-05-03

1986-04-15

Goldberg, E. A.

Recorders

Record receivers and/or driving means therefor

Laminated, impregnated, or coated bases

346137, 427162, 427402, 4274071, 428913, 430495, 430945, G01D 900, B05D 506, B32B 2706, G03C 100

Patent

active

045831025

ABSTRACT:
An optical disc comprises a resin disc substrate, a recording medium layer formed on the disc substrate, a high purity of transparent layer, and a transparent protective resin layer. The transparency of the transparent layer is larger than that of the transparent protective resin layer. A laser beam is focused on the recording medium layer through the transparent protective layer and the transparent layer. The transparent layer is a transparent adhesive layer or an air layer. The focused laser beam is not affected by foreign matter in the vicinity of the recording medium layer due to the high transparency of the transparent layer on the recording medium layer.

REFERENCES:
patent: 4268840 (1981-05-01), Schank et al.
patent: 4360820 (1982-11-01), Forster et al.
patent: 4397923 (1983-08-01), Yasuda et al.
patent: 4410581 (1983-10-01), Nam
patent: 4450452 (1984-05-01), Ando et al.
patent: 4499178 (1985-02-01), Wada et al.

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