Aluminium foil for electrolytic capacitors

Details Aluminium foil for electrolytic capacitors Aluminium foil for electrolytic capacitors

C - Chemistry, Metallurgy

25

F

334/8, 204/86.5

C25F 3/04 (2006.01) H01G 9/04 (2006.01)

Patent

CA 1193997

ABSTRACT: Low-voltage aluminium foil for electrolytic capacitors having an enlarged effective surface, char- acterized 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 chan- nels, 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.

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