Patent ID: 8684576

Claim:
A solid electrolytic capacitor, comprising: a capacitor element including a porous material of a valve metal, and a dielectric layer of an oxidation film of the valve metal; and a solid electrolyte of a conductive polymer provided on the dielectric layer, wherein the solid electrolyte comprises: a first conductive polymer layer obtained by oxidation polymerization of 2-alkyl-2,3-dihydro-thieno[3,4-b][1,4]dioxine; and a second conductive polymer layer obtained by oxidation polymerization of 2,3-dihydro-thieno[3,4-b][1,4]dioxine or a mixture of 2,3-dihydro-thieno[3,4-b][1,4]dioxine with 2-alkyl-2,3-dihydro-thieno[3,4-b][1,4]dioxine, wherein at least one of the first conductive polymer layer and at least one of the second conductive polymer layer are alternatively laminated, wherein the first conductive polymer layer is provided on the dielectric layer of the capacitor element.