A solid electrolytic capacitor formed with a dielectric coating and a solid electrolyte
layer successively formed on a surface of an anode body, wherein the solid electrolyte
layer includes a conductive polymer containing at least a fluoroalkylnaphthalenesulfonate
ion as a dopant. The conductive polymer can further contain a tetrahydronaphthalenesulfonate
ion, a naphthalenesulfonate ion or a benzenesulfonate ion as the dopant. As a result,
a solid electrolytic capacitor having a low ESR and a good heat resistance is provided.
