Reproduction mold for forming substrate for recording medium wit

Details Reproduction mold for forming substrate for recording medium wit Reproduction mold for forming substrate for recording medium wit

1986-11-20

1988-12-27

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Surface deformation means only

101458, 20419216, 20419231, 425403, 425810, B29C 5900

Patent

active

047937920

ABSTRACT:
In a precision reproducing mold for forming a substrate of a recording medium on which information signals are recored, ions are implanted into a surface bearing precise pattern, of the reproducing mold. A process for producing such mold comprises a step of implanting ions into a surface, bearing precise patterns, of the metal which is electrolytically deposited onto an original plate and then separated therefrom.

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patent: 4629631 (1986-12-01), Dearnaley
patent: 4638335 (1987-01-01), Smith et al.
patent: 4680458 (1987-07-01), Drexler

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