Method for producing a prerecorded disk-shaped die

Details Method for producing a prerecorded disk-shaped die Method for producing a prerecorded disk-shaped die

1987-02-10

1989-03-21

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204 20, 204 351, 204 384, C25D 110

Patent

active

048140473

ABSTRACT:
A method for producing a prerecorded disk-shaped die is specified in which the information signal is recorded onto a metallic recording medium. According to the invention, the information carrier layer consisting of base metal is first vapor-deposited onto a glass base. Then the information signal is recorded onto the surface of the information layer with the aid of a cutting or stamping tool. Following this, a metallic interlayer of precious metal is galvanized on, onto which another base layer particularly of metal, is then galvanized. After the glass base has been mechanically separated, the information carrier layer can then simply be removed by a chemical medium which does not attack the interlayer. The method according to the invention is particularly suitable for producing dies for digital sound recording according to the compact disk process.

REFERENCES:
patent: 4402798 (1983-09-01), Gorog et al.
patent: 4469563 (1984-09-01), Hakala
patent: 4474650 (1984-10-01), DeLaat
F. A. Lowenheim, Electroplating, McGraw-Hill Book Co., New York, 1978, p. 171.

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