AC Etching of aluminum capacitor foil

Details AC Etching of aluminum capacitor foil AC Etching of aluminum capacitor foil

1981-08-19

1984-11-20

Tufariello, T.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041294, 20412995, C25F 304, C25F 314

Patent

active

RE0317438

ABSTRACT:
Aluminum electrolytic capacitor foil is etched in a bath containing 0.7 to 2.0 M hydrochloric acid, 0.2 to 0.5 M hydrated aluminum trichloride, and 0.02 to 0.4 M phosphate ion while subjected to the action of alternating current at 35.degree. to 55.degree. C.

REFERENCES:
patent: 3193485 (1965-07-01), Vincent
patent: 3887447 (1975-06-01), Sheasby
patent: 4276129 (1981-06-01), Kanzaki et al.
patent: 4297184 (1981-10-01), Dyer

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