Method of producing aluminum foil for electrolytic capacitors an

Details Method of producing aluminum foil for electrolytic capacitors an Method of producing aluminum foil for electrolytic capacitors an

1995-12-08

1998-02-03

Ledynh, Bot L.

Electricity: electrical systems and devices

Electrolytic systems or devices

216 6, 216 56, 216 96, 216100, 216102, 205640, 205674, 205687, 205704, H01G 900, C25F 304

Patent

active

057151334

ABSTRACT:
An electrochemical cell for etching a metal workpiece such as an aluminum foil, a method for etching the foil using the electrochemical cell, and foil thus produced is provided. The cell includes an etch tank having an etch electrolyte disposed therein and containing at least a first and a second compartment each containing (i)an etch electrolyte, (ii) a cathode plate, and (iii) an ion exchange membrane separator portion comprising an ion exchange polymeric material effective to substantially retard or prevent reduction of the oxidizing agent or agents present in the etch electrolyte, the first and second compartments being arranged in the etch tank with the ion exchange membrane separator portions in facing relationship one to the other; and a metal workpiece such as
an aluminum foil anode present in the etch tank and disposed between each said first and second compartments.

REFERENCES:
patent: 3779877 (1973-12-01), Alwitt
patent: 4276129 (1981-06-01), Kanzaki et al.
patent: 4279714 (1981-07-01), Arora et al.
patent: 4609971 (1986-09-01), Shaffer
patent: 5143591 (1992-09-01), Shaffer
patent: 5503718 (1996-04-01), Kakizakai

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