Patent ID: 9728338
Date: 2017-08-08
CPC Classifications: H01G

Claim:
1. A method for manufacturing a solid electrolytic capacitor comprising a capacitor element having an anode body, a dielectric layer and a solid electrolyte layer, the method comprising the following steps to be carried out in this order for forming the solid electrolyte layer: a first step of applying a first conductive polymer solution in which fine particles of a conductive polymer are dispersed, and drying the first conductive polymer solution, to form a first conductive polymer layer; a second step of applying a coating solution containing at least one selected from an aromatic sulfonic acid and a salt of the aromatic sulfonic acid, and drying the coating solution; and a third step of applying a second conductive polymer solution in which fine particles of a conductive polymer are dispersed, and drying the second conductive polymer solution, to form a second conductive polymer layer, wherein: the aromatic sulfonic acid has, in one molecule of the aromatic sulfonic acid, a carboxyl group and a hydroxyl group, or two carboxyl groups, and the coating solution contains neither a conductive polymer nor a monomer to be polymerized into a conductive polymer.