Patent ID: 8717740

Claim:
An electrolytic capacitor, comprising: an anode foil having an anode internal terminal and a cathode foil having a cathode internal terminal are joined by way of a separator to form a capacitor element, wherein a winding end of the cathode foil is wound shorter than a winding end of the anode foil at the outermost circumference of the capacitor element, and further wherein cut burrs formed at the winding ends of the anode and the cathode foils are placed in a direction facing a capacitor element's outer circumference; a driving electrolyte; a metal case having a die surface and housing the driving electrolyte and the capacitor element; and a side surface of the metal case is swaged to create a concave portion that presses inward against a tape material wound around the outer circumference of the capacitor element, in order to press and fix the capacitor element in place inside the metal case; wherein the tape material is a winding stop tape that stops the capacitor element, and is wound by a plurality of turns around the outer circumference of the capacitor element between the capacitor element and the caulking of the metal case such that a total thickness of the tape material is approximately 200 to 600 μm so as to relax deformation of the capacitor element when the side surface of the metal case is swaged.