Manufacturing method of electrolytic capacitor

Details Manufacturing method of electrolytic capacitor Manufacturing method of electrolytic capacitor

2009-02-10

2009-11-24

Ghyka, Alexander G (Department: 2812)

Metal working

Barrier layer or semiconductor device making

Barrier layer device making

C438S381000, C257SE21008

Reexamination Certificate

active

07621970

ABSTRACT:
An capacitor element is fabricated by winding an anode foil having a dielectric oxide film formed thereon, and a cathode foil subjected to a treatment of enlarging surface area in a manner that a separator is interposed therebetween. The capacitor element is immersed in a fluid dispersion containing conductive polymer fine particles dispersed therein. Thereafter, it is depressurized and dried so that the conductive polymer fine particles adhere to surfaces of fibers of the separator, fill between the fibers of the separator, and adhere to surfaces of the anode foil and the cathode foil in a manner that the adhesion and filling of the conductive polymer fine particles are such that an amount of the fine particles decreases from ends toward a center of the capacitor element. Then, it is impregnated with an electrolytic solution.

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