Method of etching aluminum foil for electrolytic capacitors

Details Method of etching aluminum foil for electrolytic capacitors Method of etching aluminum foil for electrolytic capacitors

1995-02-22

1996-04-02

Valentine, Donald R.

Etching a substrate: processes

Forming or treating material useful in a capacitor

205660, 205674, 205682, 205684, 205685, 216103, C25F 304

Patent

active

055037186

ABSTRACT:
A method of etching an aluminum foil for electrolytic capacitors, comprising the steps of electrolytically etching an aluminum foil for electrolytic capacitors that has a high cubic texture in an electrolyte containing a chloride to form pits, and enlarging the pits formed in the above step by etching, in which step of forming pits the current density is increased from 0 to a maximum value quickly and then is decreased gradually.

REFERENCES:
patent: 4420367 (1983-12-01), Locher
patent: 4474657 (1984-10-01), Arora
patent: 4518471 (1985-05-01), Arora
patent: 4525247 (1985-06-01), Arora

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