Solid electrolytic capacitor and a method for manufacturing the same

Abstract

A solid electrolytic capacitor according to the present invention includes a solid electrolyte type capacitor element including a dielectric layer intervening between an anode section and a cathode section, an anode terminal connected electrically to the anode section of the capacitor element through a pad member, and a cathode terminal connected electrically to the cathode section of the capacitor element. Here, the pad member is formed by performing a cutting process on a metal plate. The pad member includes a cutting surface produced by the cutting process, and the cutting surface forms a joint surface joined to the anode section of the capacitor element and a joint surface joined to the anode terminal.

1 . A solid electrolytic capacitor comprising:
 a solid electrolyte type capacitor element including a dielectric layer intervening between an anode section and a cathode section;   an anode terminal connected electrically to the anode section of the capacitor element through a pad member; and   a cathode terminal connected electrically to the cathode section of the capacitor element, wherein   the pad member is formed by performing a cutting process on a metal plate, and which includes a cutting surface produced by the cutting process, and the cutting surface forms a joint surface joined to the anode section of the capacitor element and a joint surface joined to the anode terminal.   
     
     
         2 . The solid electrolytic capacitor according to  claim 1 , wherein the pad member is formed by performing a punching process on the metal plate to form a ladder plate member, and thereafter cutting a rung section out from the ladder plate member, the pad member includes a pair of cutting surfaces produced by the punching process, and the cutting surfaces form a joint surface joined to the anode section of the capacitor element and a joint surface joined to the anode terminal respectively. 
     
     
         3 . The solid electrolytic capacitor according to  claim 1 , wherein a width of the pad member in a direction from the anode terminal toward the cathode terminal is smaller than a height of the pad member. 
     
     
         4 . A method for manufacturing a solid electrolytic capacitor comprising: a solid electrolyte type capacitor element including a dielectric layer intervening between an anode section and a cathode section; an anode terminal connected electrically to the anode section of the capacitor element through a pad member; and a cathode terminal connected electrically to the cathode section of the capacitor element,
 the method comprising the steps of:   forming a pad forming member which is to be the pad member by performing a cutting process on a metal plate, the pad forming member having a width in a direction perpendicular to a thickness direction of the plate equal to a height of the pad member;   joining the pad forming member to a surface of the anode terminal with its width direction directed in a direction perpendicular to the surface of the anode terminal, after performing the forming step; and   mounting the capacitor element on the anode terminal and the cathode terminal after performing the joining step, and thereafter connecting the anode section of the capacitor element to a tip end surface of the pad forming member, and   connecting the cathode section of the capacitor element to the cathode terminal.   
     
     
         5 . The method for manufacturing a solid electrolytic capacitor according to  claim 4 , wherein in the forming step, the pad forming member is formed by performing a punching process on the metal plate to form a ladder plate member, and thereafter cutting a rung section out from the ladder plate member. 
     
     
         6 . The method for manufacturing a solid electrolytic capacitor according to  claim 4 , wherein the pad forming member produced in the forming step has a thickness smaller than the width, and in the joining step, the pad forming member is joined to the surface of the anode terminal with its width direction directed in a direction perpendicular to the surface of the anode terminal and its thickness direction directed in a direction from the anode terminal toward the cathode terminal.