Abstract: An electrolytic capacitor with improved connectivity between a cathode body including a carbon layer and a lead terminal, and a production method thereof are provided. The electrolytic capacitor 1 includes an anode body 2 having a dielectric oxide film 5 on a surface thereof, a cathode body 3 having a cathode foil 31 and a carbon layer 32 formed on the cathode foil 31, electrolytic solution 6 interposed between the anode body 2 and the cathode body 3, and a lead terminal 7 connected to each of the anode body 2 and the cathode body 3 by cold pressure welding. A maximum static friction coefficient of a surface of the carbon layer of the cathode body is 0.6 or more.

Abstract: A capacitor has electrode foil (2, 60) and a terminal (tab 4) connected, an etch layer (16) being formed in the electrode foil, wherein a plurality of interrupting parts (12) are included in the etch layer, which is formed in the electrode foil, and at least in a connection part (stitching part 6) at which the terminal is connected. It makes it possible for the electrode foil of a higher capacitance to have flexibility, makes it possible to suppress cracks caused by pressing, and makes it possible to prevent cracks from spreading. In addition, such effects are expected that the electrode foil can be prevented from being damaged in a process of connecting the tab including folding the electrode foil, and pressing raised pieces of the electrode foil and the tab onto the electrode foil.

Abstract: A capacitor has electrode foil (2, 60) and a terminal (tab 4) connected, an etch layer (16) being formed in the electrode foil, wherein a plurality of interrupting parts (12) are included in the etch layer, which is formed in the electrode foil, and at least in a connection part (stitching part 6) at which the terminal is connected. It makes it possible for the electrode foil of a higher capacitance to have flexibility, makes it possible to suppress cracks caused by pressing, and makes it possible to prevent cracks from spreading. In addition, such effects are expected that the electrode foil can be prevented from being damaged in a process of connecting the tab including folding the electrode foil, and pressing raised pieces of the electrode foil and the tab onto the electrode foil.