Etching of aluminum capacitor foil

Details Etching of aluminum capacitor foil Etching of aluminum capacitor foil

1980-09-15

1981-07-21

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041294, 20412995, C25F 304, C25F 314

Patent

active

042797152

ABSTRACT:
Aluminum electrolytic capacitor foil is etched in a bath containing 1.0 to 1.8 M hydrochloric acid, 0.25 to 0.5 M aluminum chloride, 0.2 to 1.0 M phosphoric acid, and 1.0 to 2.0 M chromium trioxide while subjected to the action of alternating current at 35.degree. to 55.degree. C.

REFERENCES:
patent: 3477929 (1969-11-01), Namikata et al.
patent: 3663441 (1972-05-01), Gulla
patent: 3887447 (1975-06-01), Sheasby et al.
patent: 4140599 (1979-02-01), Yamasaki et al.

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