Chemical etching of aluminum capacitor foil

Details Chemical etching of aluminum capacitor foil Chemical etching of aluminum capacitor foil

1982-08-23

1983-07-26

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

252 792, C23F 100

Patent

active

043953050

ABSTRACT:
Aluminum capacitor foil is chemically etched to produce a fine etch structure by passing the foil through an etch bath containing sodium chloride and at least an equal amount of sulfuric acid, preferably 11 to about 22 wt %. Etching is carried out at 90.degree. to 105.degree. C.

REFERENCES:
patent: 3284326 (1966-11-01), Martin
patent: 3316164 (1967-04-01), Welch
patent: 3321389 (1967-05-01), Anderson
patent: 3884783 (1975-05-01), Austin

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