Patent ID: 7691157
Filing Date: 2010-04-06
Classification: H01G,Y02E

Abstract:
1. A method for producing a solid electrolytic capacitor in which a dielectric film layer is formed on a valve-acting metal surface having fine pores and a solid electrolyte layer comprising an electrically conducting polymer composition is provided on the dielectric film by polymerizing a monomer with use of an oxidizing agent, the method providing the solid electrolyte layer by a process comprising a step of dipping a valve-acting metal having thereon a dielectric film layer in a monomer-containing solution, followed by drying (Step 1 ), a step of dipping the valve-acting metal in an oxidizing agent-containing solution, followed by drying (Step 2 ), and a step of dipping the valve-acting metal in an oxidizing agent-free solution, followed by drying (Step 3 ); wherein the residual ratio of the solid electrolyte after washing, which is represented by the formula: (mass of the net solid electrolyte which remained on the surface of the aluminum foil after washing in the warm water and drying)/(mass of the solid electrolyte containing impurities formed on the surface of the aluminum foil before washing in warm water)×100, is 55 to 90%.