Electrolytic capacitor having a conducting polymer layer without

Details Electrolytic capacitor having a conducting polymer layer without Electrolytic capacitor having a conducting polymer layer without

1998-06-03

2000-10-17

Dinkins, Anthony

Electricity: electrical systems and devices

Electrolytic systems or devices

Liquid electrolytic capacitor

361516, 361529, 361532, H01G 9042, H01G 904

Patent

active

061340995

ABSTRACT:
An electrolytic capacitor in which an conducting polymer as a cathode of the electrolytic capacitor is formed as a homogeneous and densified film on the dielectric layer even extending to the inside of pores of a valvular metal porous body and which obtains a high rate of inducing the capacitance, and have low impedance and high responsiveness at high frequencies. A chemical oxidation polymerization method is utilized to form an conducting polymer layer even extending to the inside of pores of the capacitor element. First, a polymerization reaction is performed in a solution excluding an organic acid-type dopant to form an conducting polymer layer as a densified film on a dielectric layer extending from the surface of the porous body to every inside portions of pores in the pretreatment. Then a polymerization reaction is performed in a solution containing an organic acid-type dopant to grow an conducting polymer layer containing an organic acid-type dopant over the conducting polymer layer without including an organic acid-type dopant in the primary treatment.

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