Method and apparatus for electroforming a stamper for producing

Details Method and apparatus for electroforming a stamper for producing Method and apparatus for electroforming a stamper for producing

1984-07-06

1985-09-03

Tufariello, Thomas

Chemistry: electrical and wave energy

Processes and products

204212, 204275, C25D 110, C25D 2110, C25D 2112

Patent

active

045390797

ABSTRACT:
Method and apparatus for producing a desired thickness distribution on a stamping plate in a rotary electroforming process. The stamping plate is used to produce a high density information recording carrier. A shielding plate is detachably mounted adjacent a fixed anode in an electrochemical bath. Another shielding plate is detachably mounted adjacent the rotary cathode. During electroforming either or both shielding plates are put into position or removed at appropriate times to produce the desired thickness distribution.

REFERENCES:
patent: 2751345 (1956-06-01), Osman
patent: 4359375 (1982-11-01), Smith
patent: 4391694 (1983-07-01), Runsten
patent: 4415423 (1983-11-01), Brooks
patent: 4435266 (1984-03-01), Johnston
patent: 4447307 (1984-05-01), Davis

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