Patent ID: 8213158

Claim:
A solid electrolytic capacitor comprising: an anode of a porous body formed of a valve metal or its alloy, an anode lead of which one end is embedded inside said anode; a dielectric layer formed on a surface of said porous body and in an inside part of the anode; a conductive polymer layer formed on said dielectric layer formed on the surface of said porous body, said anode having a first region and a second region sharing a common periphery in the inside part of the anode, said first region being located from a surface of the anode lead to the common periphery in the inside part of said porous body, said second region being located from the common periphery to a surface of the conductive polymer layer, a cathode layer formed on said conductive polymer layer in the second region of said anode; said conductive polymer layer in said first region being formed of a polypyrrole layer alone around the anode lead, said conductive polymer layer in said second region being composed of a polyethylenedioxythiophene layer provided on the dielectric layer and the polypyrrole layer provided on the polyethylenedioxythiophene layer, and said cathode layer being formed on the polypyrrole layer in said second region.