Method of producing solid electrolytic capacitor

A method of manufacturing a solid electrolytic capacitor, in a method of manufacturing a solid electrolytic capacitor in which on a surface of a anode body that is made of niobium or an alloy primarily made of niobium, a dielectrics film layer, a first conductive polymer layer and a second conductive polymer layer are sequentially formed, comprising:

• a step of forming, on the dielectrics film layer, a first conductive polymer layer made of polypyrrole or a polypyrrole derivative by immersing a anode body on which the dielectrics film layer is formed in a solution that includes from 0.7 to 10% by weight of hydrogen peroxide, from 0.3 to 3% by weight of sulfuric acid and water as a main solvent, followed by, after pulling up, exposing to vapor of pyrrole or a pyrrole derivative;
• and
• a step of forming a second conductive polymer layer on the first conductive polymer layer by immersing the anode body on which the dielectrics film layer and the first conductive polymer layer are formed in a solution that includes a polymerizing monomer and a supporting electrolyte, followed by energizing the solution to electrolytically polymerize the polymerizing monomer.