Patent ID: 7961454
Filing Date: 2011-06-14
Classification: H01G,Y02E

Abstract:
1. A multi-layered solid electrolytic capacitor comprising: a plurality of capacitor elements, each comprising an anode body having an anode portion and a cathode portion having a dielectric oxide film and a cathode layer formed in succession on a surface of the anode body, wherein the plurality of capacitor elements are stacked on top of one another, the anode portions of adjacent capacitor elements are welded each other, and the anode portion of one of the outermost capacitor elements is weld-secured to an anode terminal, the multi-layered solid electrolytic capacitor being characterized in that: a stress alleviating groove and/or a stress alleviating hole is/are formed in between a welded part and the boundary between the anode and cathode portions in at least one of weld surfaces of the anode portion, and the stress alleviating groove or the stress alleviating hole is so formed that the more distant the anode portion is from the anode terminal, the greater the area of the stress alleviating groove or the stress alleviating hole in the weld surface.