Solid electrolytic capacitor and method of manufacturing the same

Abstract

A solid electrolytic capacitor includes a capacitor element, an anode terminal, and a cathode terminal. The capacitor element has an element body. An outer circumference of the element body is defined by first to fourth side surfaces. An exposed surface of a cathode layer is defined at least on the second and third side surfaces. The cathode terminal has first and second terminal component parts. The first terminal component part extends along the third side surface. The second terminal component part adjoins the first terminal component part while extending above the second side surface. A first conductive adhesive is interposed between the first terminal component part and the third side surface. A second conductive adhesive is interposed between the second terminal component part and the second side surface. The second conductive adhesive extends along the second side surface to reach the peripheral edge of the fourth side surface.

1 . A solid electrolytic capacitor, comprising:
 a capacitor element having an element body with an outer circumference the region of which is at least partially defined by a cathode layer, and an anode lead pulled out of the element body through the outer circumference of the element body;   an anode terminal electrically connected to the anode lead; and   a cathode terminal electrically connected to the cathode layer, wherein   the outer circumference of the element body is defined by a first side surface through which the anode lead is pulled out, a second side surface opposite the first side surface, and third and fourth side surfaces opposite each other and which extend between peripheral edges of the first side surface and peripheral edges of the second side surface, and an exposed surface of the cathode layer is defined at least on the second and third side surfaces of the outer circumference of the element body, and   the cathode terminal has a first terminal component part extending along the third side surface of the element body, and a second terminal component part adjoining the first terminal component part while extending above the second side surface of the element body, a first conductive adhesive is interposed between the first terminal component part and the third side surface of the element body, a second conductive adhesive is interposed between the second terminal component part and the second side surface of the element body, and the second conductive adhesive extends along the second side surface of the element body to reach the peripheral edge of the fourth side surface.   
     
     
         2 . The solid electrolytic capacitor according to  claim 1 , wherein the second terminal component part is provided with an opening that passes through the second terminal component part from its front surface to its rear surface, and the second conductive adhesive is interposed between the second terminal component part and the second side surface of the element body while the opening is not filled with the second conductive adhesive. 
     
     
         3 . A method of manufacturing a solid electrolytic capacitor, the solid electrolytic capacitor comprising: a capacitor element having an element body with an outer circumference the region of which is at least partially defined by a cathode layer, and an anode lead pulled out of the element body through the outer circumference of the element body; an anode terminal electrically connected to the anode lead; and a cathode terminal electrically connected to the cathode layer, the outer circumference of the element body being defined by a first side surface through which the anode lead is pulled out, a second side surface opposite the first side surface, and third and fourth side surfaces opposite each other and which extend between peripheral edges of the first side surface and peripheral edges of the second side surface, an exposed surface of the cathode layer being defined at least on the second and third side surfaces of the outer circumference of the element body, the cathode terminal having a first terminal component part extending along the third side surface of the element body, and a second terminal component part adjoining the first terminal component part while extending above the second side surface of the element body,
 the method comprising the steps of:   (a) placing the element body on a surface of the first terminal component part after applying the first conductive adhesive to the surface of the first terminal component part, the element body being placed with the third side surface of the element body facing the surface of the first terminal component part such that the first conductive adhesive is interposed between the third side surface of the element body and the first terminal component part; and   (b) applying a second conductive adhesive to fill space between the second terminal component part and the second side surface of the element body after the step (a).   
     
     
         4 . The method according to  claim 3 , wherein application of the second conductive adhesive in the step (b) is such that the second conductive adhesive extends along the second side surface of the element body to reach the peripheral edge of the fourth side surface of the element body. 
     
     
         5 . The method according to  claim 3 , wherein
 the second terminal component part is provided with an opening that passes through the second terminal component part from its front surface to its rear surface, and   application of the second conductive adhesive to fill the space between the second terminal component part and the second side surface of the element body in the step (b) is such that the opening is not filled with the second conductive adhesive.