Patent ID: 6839223
Filing Date: 2005-01-04
Classification: H01G

Abstract:
1. A capacitor comprising: a capacitor element including an anode foil, a cathode foil, and a separator interposed therebetween, which are wound together to form a roll-shaped structure; a pair of leader lines each having an aluminum elongated round-bar-shaped portion, a copper-undercoated and tin-plated iron wire joined to one of the ends of said round-bar-shaped portion, and a flat portion formed by flattening the other end of said round-bar-shaped portion, said flat portions being joined to said anode and cathode foils, respectively; a metal case having a closed bottom and an open top end, and containing said capacitor element; and a sealing member sealing the open top end of said case, said sealing member being formed with a pair of through-holes allowing said leader lines to penetrate therethrough to extend outside, wherein each of said anode and cathode foils is joined to said corresponding flat portion of said leader line through at least two caulked joint sections formed at each of the opposite ends of said flat portion, and a plurality of pressure-welded joint sections formed along a straight line connecting between said respective caulked joint sections at said opposite ends.