Patent ID: 7387648

Claim:
A manufacturing method of a solid electrolytic capacitor, comprising: providing an anode foil made of metal aluminum; forming a dielectric oxide film on the surface of anode foil of metal aluminum; providing a cathode foil made of metal aluminum; setting a separate sheet between said anode foil and said cathode foil; coiling said separate sheet, said anode foil and said cathode foil together, thus forming a core of a coil type capacitor, forming a capacitor element comprising organic polymer with high electrical conductivity via oxidation, carbonization, immersing and chemical oxypolymerization; washing with solvent; casing into an aluminum casing , the opening of said casing being sealed with a seal member; and processing by aging and sorting; said core of said capacitor is oxidized in a 2 to 10% solution of adipate ammonium at a temperature from 60 to 90° C. for 10 to 30 minutes.