Abstract: The object of the present invention is to provide an aluminum electrolytic capacitor and its manufacturing method. The aluminum electrolytic capacitor of the present invention comprises a capacitor element formed by winding an electrode foil, at least an anode foil of which is structured so as to have part of the surface thereof made free of an oxide film and connected with a lead. The capacitor element is placed in a bottomed metal case together with a driving electrolyte, thereby achieving low resistance, a reduction in size, high ripple-current carrying and low loss characteristics entirely due to perfect connection between the electrode foil and the lead.

Abstract: A chip type aluminum electrolytic capacitor (1) has a capacitor element (2) impregnated with an electrolytic solution, a cylindrical case (3) for containing the capacitor element (2), a sealing member (4) for sealing the cylindrical case (3), and an insulating board (5) having a mounting surface (5c) to be fixed to an electronic circuit board; and vapor pressure of the electrolytic solution is regulated to a predetermined value to prevent deformations of the cylindrical case (3) and the sealing member (4).

Abstract: A chip type aluminum electrolytic capacitor (1) has a capacitor element (2) impregnated with an electrolytic solution, a cylindrical case (3) for containing the capacitor element (2), a sealing member (4) for sealing the cylindrical case (3), and an insulating board (5) having a mounting surface (5c) to be fixed to an electronic circuit board; and vapor pressure of the electrolytic solution is regulated to a predetermined value to prevent deformations of the cylindrical case (3) and the sealing member (4).