Solid electrolytic capacitor with conductive polymer as solid el

Details Solid electrolytic capacitor with conductive polymer as solid el Solid electrolytic capacitor with conductive polymer as solid el

1995-08-30

1997-12-02

Picard, Leo P.

Electricity: electrical systems and devices

Electrolytic systems or devices

Solid electrolytic capacitor

361523, 361524, 361528, 29 2541, 29 2542, 29 2503, H01G 900

Patent

active

056942877

ABSTRACT:
The solid electrolytic capacitor disclosed has a conducting polymer as a solid electrolyte and an antioxidant contained substantially only in a layer disposed in the neighborhood of a surface of the conducting polymer. The antioxidant serves to block the progress of oxidation of organic materials. A capacitor element with conducting polymer not containing the antioxidant is first prepared and this capacitor element is then dipped in a solution containing the antioxidant. Thus, the antioxidant at high concentration is caused to be introduced into the conducting polymer so as to be contained substantially only in a layer disposed in the neighborhood of the surface of the conducting polymer. Since the antioxidant can be introduced by merely dipping the capacitor element in the antioxidant solution, the method can be applied widely to capacitors irrespective of the process of conducting polymer formation. The antioxidant concentration inside the conducting polymer is substantially zero so that the conductivity thereof is not affected.

REFERENCES:
patent: 3673186 (1972-06-01), Cyba
patent: 4943892 (1990-07-01), Tsuchiya et al.
patent: 5586000 (1996-12-01), Sakata et al.
patent: 5590212 (1996-12-01), Uryu et al.

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