Solid electrolytic capacitor using a doped conductive polymer

A method for manufacturing a solid electrolytic capacitor comprising:

• forming a dielectric layer on an anode body made of a valve metal;
• forming a solid electrolyte layer on the dielectric layer;
• and
• forming a cathode body layer on the solid electrolyte layer, wherein
• the forming of the solid electrolyte layer comprises:
• forming a first layer by forming, after forming a first conductive polymer on the dielectric layer by using chemical polymerization, a second conductive polymer composed of a self-doped-type conductive polymer;
• removing excessive second conductive polymer formed on the surface of the first conductive polymer by washing the first layer;
• and
• forming a second layer containing a third conductive polymer on the first layer by using a suspension containing a conductive polymer doped with a polymer dopant, wherein
• the first conductive polymer has a sponge-like structure, and
• when the second layer is formed, the third conductive polymer enters into voids of the sponge-like structure of the first conductive polymer so that the first conductive polymer comes into contact with the third conductive polymer.