Composite substrate plate for magnetic or optical disk and proce

Details Composite substrate plate for magnetic or optical disk and proce Composite substrate plate for magnetic or optical disk and proce

1985-06-05

1987-06-16

Lesmes, George F.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

369288, 428215, 428221, 428414, 428416, 428418, 4284231, 4284235, 4284258, 428458, 428694, 428900, 430945, G11B 2342, G11B 724

Patent

active

046736026

ABSTRACT:
A composite substrate plate for a magnetic or optical disk, comprising a metal plate, an undercoat resin layer formed on one side or both sides of said metal plate, and a surface resin layer having a mirrorlike surface formed on said undercoat resin layer. Such a composite substrate plate is obtained by placing a liquid resin for forming the surface resin layer on the undercoat resin layer formed on one side or both sides of said metal plate or, alternatively, on one or two mirror-finished surfaces of molding plates for imparting a mirrorlike surface to said surface resin layer, then assembling the metal plate and the one or two molding plates so that one side or both sides of said metal plate carrying the undercoat resin layer and the liquid resin may be brought into contact with the one or two clean mirrorlike surfaces of molding plates or, alternatively, one side or both sides of said metal plate carrying the undercoat resin layer and no liquid resin may be brought into contact with the one or two liquid resin-bearing surfaces of molding plates, subsequently allowing the liquid resin to cure, and removing the one or two mirror-finished molding plates.

REFERENCES:
patent: 4250219 (1981-02-01), Pogoda
patent: 4300143 (1981-11-01), Bell et al.
patent: 4407880 (1983-10-01), Terao et al.
patent: 4423427 (1983-12-01), Kaiser
patent: 4451915 (1984-05-01), LaBudde et al.
patent: 4492730 (1985-01-01), Oishi et al.
patent: 4547876 (1985-10-01), Ettenberg
patent: 4555716 (1985-11-01), Odawara et al.
patent: 4571314 (1986-02-01), Suzuki et al.
patent: 4576896 (1986-03-01), Suzuki et al.
patent: 4592939 (1986-06-01), Temple et al.
patent: 4598017 (1986-07-01), Bayer et al.

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