Pulsed in etching of aluminum foil for use in electrolytic capac

Details Pulsed in etching of aluminum foil for use in electrolytic capac Pulsed in etching of aluminum foil for use in electrolytic capac

1981-12-09

1984-11-20

Gellner, Michael L.

Electricity: electrical systems and devices

Miscellaneous

29570, 20412943, H01G 900, H01G 904, H01G 924, C22C 2100

Patent

active

044842520

ABSTRACT:
Low-voltage aluminium foil for electrolytic capacitors having an enlarged effective surface, characterized by narrow long channels which repeatedly change their directions. The overall length of the channels, which have a diameter of approximately 0.2 micron is more than 5 microns. The zones on both sides of the foil, which zones have been provided with channels, extend to substantially equal depth over the entire surface, a zone of at least 15 microns in the middle of the cross-section being of compact aluminium. This foil can be obtained by means of pulsed direct current etching.

REFERENCES:
patent: 3997339 (1976-12-01), Fickelscher

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