Solid electrolytic capacitor

Abstract

The invention provides a solid electrolytic capacitor which is easy to manufacture at low cost, has a low-resistance structure and is excellent in reliability. The solid electrolytic capacitor that includes a capacitor element laminate, a first external electrode, and a second external electrode. The capacitor element laminate includes capacitor elements, cathode lead-out layers, and a sealing body. At least one capacitor element includes an anode foil, dielectric layers, and cathode layers. The first external electrode is connected to the anode foil exposed at the first end surface of the capacitor element laminate. The second external electrode is connected to the cathode lead-out layers exposed at the second end surface of the capacitor element laminate. A first cathode lead-out layer and a second cathode lead-out layer are both conductive paste layers, and uniformly extend from where the first cathode lead-out layer and the second cathode lead-out layer are disposed on the cathodelayers to the second external electrode.

Description

technical field [0001] This invention relates to solid electrolytic capacitors. Background technique [0002] Patent Document 1 discloses a solid electrolytic capacitor in which a plurality of units are laminated, and the unit has: a valve metal substrate having a porous layer on the surface; a dielectric layer formed on the surface of the porous layer; and a solid electrolyte layer , disposed on the above-mentioned dielectric layer, the solid electrolytic capacitor is characterized in that there are conductor layers between the stacked units, at least one of the above-mentioned conductor layers includes a metal foil, and the above-mentioned units and the above-mentioned conductor layers are covered with an exterior resin For sealing, the anode side end surface of the above-mentioned valve action metal substrate is directly connected to the anode external electrode formed on the surface of the exterior resin on one end surface of the solid electrolytic capacitor, and the abo...

AI Technical Summary

Problems solved by technology

However, since this metal foil does not function as a capacitor, it becomes the cause of the reduction in the capacitance effective volume occupied by the entire product.

In addition, in order to manufacture the solid electrolytic capacitor described in Patent Document 1, it is necessary to process the metal foil, so the manufacturing process tends to become complicated.

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