Patent ID: 7911765

Claim:
A metalized film capacitor comprising: metalized films; and a pair of extraction electrodes formed on both end surfaces of the metalized films, wherein only one end of each of the metalized films is alternately connected to one of the extraction electrodes, each of the metalized films including: a dielectric film of an organic polymer; and a metal vapor-deposited electrode formed on the dielectric film in a way in which a non metal vapor-deposited portion that is an exposed portion of the dielectric film is continuously left in a longitudinal direction of one end in a width direction of the dielectric film, the metalized film being wound around a winding core in a way in which the non metal vapor-deposited portions are disposed in an opposite direction and a pair of the metal vapor-deposited electrodes face each other with the dielectric film interposed therebetween in a state in which they are shifted by a predetermined dimension so as to widen in the width direction, thereby forming the metalized film capacitor having an elliptical sectional shape with a linear portion and a curved portion, wherein in the elliptical sectional shape, when a major axis is denoted by “a” and a minor axis is denoted by “b”, “a” is not less than 60 mm, the dimension shifted in the width direction is not less than 1.2 mm when the dimension of the major axis “a” is not less than 60 mm and less than 100 mm, the dimension shifted in the width direction is not less than 1.3 mm when the dimension of the major axis “a” is not less than 100 mm and less than 120 mm, and the dimension shifted in the width direction is not less than 1.4 mm when the dimension of the major axis “a” is not less than 120 mm, the winding core is obtained by winding, 5 to 10 turns, a polypropylene film having a thickness of 3 to 10 times as thick as the thickness of the dielectric film constituting the metalized film; and a dimension from this winding core to a circumferential surface is not more than 14 mm, and at least a part of an end portion of the winding core is welded at a heat sealing and this heat sealing is provided with a plurality of concave portions.