| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a solid electrolytic capacitor used for various kinds of electronic equipment, and to increase its capacity. SOLUTION: In the electrolytic capacitor, an element 1, where anode foil 2 and cathode foil 3 are wound by interposing a separator 4 between them, is stored in a metal case 8 with an electrolyte 7 for drive, and the opening of the metal case 8 is sealed by a sealing element 9. The anode foil 2 and/or the cathode foil 3 comprise: a base material made of valve action metal foil; and a vapor-deposited layer of valve action metal formed by vapor deposition on the surface of the base material. The vapor-deposited layer of the valve action metal is formed in a frost pillar shape from the base material toward a surface layer and in a so-called aquatic plant shape, where each particle is branched into a plurality of parts which are combined integrally. Therefore, the surface area is increased by additional surface-roughening and its mechanical strength is increased, thus miniaturizing the solid electrolytic capacitor by thinning and increasing its capacity. COPYRIGHT: (C)2009,JPO&INPIT
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