The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 2000
Filed:
Jun. 03, 1998
Matsushita Electric Industrial, Osaka, JP;
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.