Apparatus and method for regeneration of chromosulfuric acid etc

Details Apparatus and method for regeneration of chromosulfuric acid etc Apparatus and method for regeneration of chromosulfuric acid etc

1976-06-18

1978-02-14

Mack, John H.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041291, 204234, 204252, 156642, 156666, C25C 112, C25F 302, C25C 704, C25C 706

Patent

active

040737080

ABSTRACT:
A chromic-sulfuric etching solution for copper is regenerated in an etching container with a permeable diaphragm dividing the container into an etching chamber and a sulfuric acid containing chamber. Electric current passes between an anode electrode located in the etchant chamber and a cathode electrode located in the sulfuric acid chamber to regenerate the etchant in the anode containing chamber and to deposit copper on the cathode.

REFERENCES:
patent: 3406108 (1968-10-01), Radimer et al.
patent: 3615957 (1971-10-01), Konstantouros
patent: 3634213 (1972-01-01), Coates
patent: 3788915 (1974-01-01), Gulla

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