SOLID ELECTROLYTIC CAPACITOR AND METHOD OF MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To reduce the cathode-side series resistance of a solid electrolytic capacitor using a sintered compact obtained from the powder of a valve-action metal for an anode body and manganese dioxide as a solid electrolyte, with a small amount of silver powder having diameters of 1 μm or smaller by making a silver layer composed only of the silver powder directly formable on a manganese dioxide layer. SOLUTION: Sintered pellets 2, each of which is coated with a manganese dioxide layer 4, are dipped in suspension composed only of very fine silver powder having diameter in the range of 3-100 nm and a solvent, pulled from the suspension, and baked at a prescribed temperature. The suspension is prepared by pre-coating the fine silver powder with a dispersant composed of a saturated fatty acid, such as the myristic acid, stearic acid, or lauric acid and dispersing the silver powder in a solvent, for example, butyl acetate. Since the solvent and dispersant are decomposed and volatilized, when the pellets are baked at 200 deg.C for 60 minutes, the silver layer 6A composed only of the silver powder is formed directly on the manganese dioxide layer 4.