Patent ID: 7729103

Claim:
A solid electrolytic capacitor comprising: an anode made of a metal or an alloy having valve action; a dielectric layer formed on said anode; and an electrolyte layer composed of a conductive polymer layer formed so as to have contact with a portion of the region on the surface of said dielectric layer, and a manganese dioxide layer formed so as to have contact with the other portion of the region on the dielectric layer surface wherein said conductive polymer layer is formed like islands on the surface of said dielectric layer and said manganese dioxide layer is formed so as to cover said conductive polymer layer and the surface of said dielectric layer, and wherein the covering ratio of said conductive polymer layer, which is the ratio of the surface area where said conductive polymer layer is brought into contact with said dielectric layer, relative to the entire surface area of said dielectric layer, is in the range of 3 to 70%.