| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing solid electrolytic capacitor by which the deterioration of the withstand voltage characteristic of a solid electrolytic capacitor caused by lead-free reflow soldering can be prevented and yield can be improved at the time of manufacturing products having high withstand voltages. SOLUTION: A capacitor element is formed by winding up an anode foil, on the surface of which the oxide coating film layer is formed, and a cathode foil with a separator between and the formed capacitor element is subjected to restorative formation. Then, a link composed of a compound having a vinyl group and a boric acid compound is formed in the capacitance element by impregnating the element with a solution containing the compounds. Thereafter, a solid electrolytic layer is formed by making a conductive polymer to cause a polymerization reaction in the capacitor element by dipping the element in a mixed solution prepared by mixing a polymerizable monomer and oxidizing agent in a prescribed solvent. Finally, the solid electrolytic capacitor is formed by inserting the capacitor element into an encapsulating case through the opened end section of the case and, after the end section is sealed by fitting sealing rubber to the end section and caulking the rubber, aging is conducted to the rubber.
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