Patent ID: 6088218
Filing Date: 2000-07-11
Classification: H01G

Abstract:
A method for producing an electrolytic capacitor including a porous body of a valve metal, an oxide film on a surface of the valve metal, and a conductive polymer layer on a surface of the oxide film,the method comprising forming the conductive polymer layer on the surface of the oxide film, which comprising the steps of:dipping the porous body provided with the oxide film in a monomer solution containing a monomer so as to contain the monomer in pores of the porous body;lifting the porous body from the monomer solution and dipping the porous body in an oxidizing solution containing an oxidant; andlifting the porous body from the oxidizing solution and allowing the porous body to stand,wherein in the step of dipping the porous body in the oxidizing solution, a period for which the porous body is dipped in the oxidizing solution is equal to or shorter than a period in which 30% of the monomer contained in the pores of the porous body diffuses and flows into the oxidizing solution.