METHOD FOR MANUFACTURING SOLID ELECTROLYTIC CAPACITOR

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a solid electrolytic capacitor in which the yield can be increased at the time of manufacturing a high withstand voltage capacitor. SOLUTION: An anode foil having an oxide film formed on the surface and a cathode foil are wound through a separator to form a capacitor element which is then subjected to repair formation. Subsequently, the capacitor element is immersed into a mixture liquid prepared by mixing polymeric monomer, an oxidizing agent and a specified solvent in order to cause polymerization of conductive polymer in the capacitor element thus forming a solid electrolytic layer. The capacitor element is inserted into a case which is then sealed by caulking while fixing a sealing rubber to the end part of the opening and then it is subjected to aging to produce a solid electrolytic capacitor. Heat treatment is carried out for a specified time at a temperature not higher than 200 deg.C at an arbitrary time before aging after the conductive polymer is formed in the capacitor element.