| 摘要 |
PROBLEM TO BE SOLVED: To provide a method by which a solid electrolytic capacitor that is free from the fall of its electrostatic capacitance, low in leakage current level, and excellent in reliability can be manufactured. SOLUTION: In the method of manufacturing the solid electrolytic capacitor, a capacitor element is formed by sintering the powder of a valve-action metal after press-molding the powder and an anodically oxidized coating film is formed on the capacitor element. A forming step which is performed for forming the anodically oxidized coating film is composed of, at least, two forming steps. In the second forming step, the distance between the capacitor element and a negative plate is made shorter than that between the capacitor element and negative plate in the first forming step. In the second forming step, the distance between the capacitor element and negative plate is adjusted to 0.1-10.0 mm and the conductivity of the used forming liquid is adjusted to 3.0-2,000μS/cm. In addition, the number of used negative plate is not less than one. COPYRIGHT: (C)2006,JPO&NCIPI
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