Method of etching aluminum foil

Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step

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156656, 1566591, 156665, 156904, 20412935, 20412965, 428601, 428612, B44C 122, C23F 100

Patent

active

054054931

ABSTRACT:
A method of etching increases the surface area of a metal foil by creating uniformly distributed etch tunnels. The foil is pretreated by depositing a discontinuous surface layer of metal that is cathodic to the foil, followed by chemically etching the foil to remove a portion of the deposited metal. Finally, the foil is electrochemically etched to create the etch tunnels.

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patent: 4676879 (1987-06-01), Salvadori
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Tsuchiya, et al., Chemical Abstracts, vol. 112, 1990; page 774; 112:228258g, "Manufacture of cathode foil for electrolytic capacitors by using alloy coating".
Matsuda, et al., Chemical Abstracts, vol. 114, 1991; pp. 789-790; 114:73672c, "Manufacture of electrode foils for electrolytic capacitors".
Yokoyama, et al., Chemical Abstracts, vol. 114, 1991; p. 861; 114:198072p, "Manufacture of aluminum electrodes for electrolytic capacitors".

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