Abstract: An electrical capacitor is formed utilizing a thin dielectric layer which is metallized on both sides to provide electrode areas. An unmetallized margin area is provided on one side of the dielectric layer along one longitudinal edge of the dielectric layer and an unmetallized margin area is provided on the other side of the dielectric area along the opposite longitudinal edge dimension of the dielectric layer. The capacitor is formed by pleating, or folding, the dielectric layer along its longitudinal dimension an even number of times so that the unmetallized margin areas extend outwardly beyond the pleats adjacent the same longitudinal edge. The dielectric layer may next be wound to form a wound capacitor segment and then a metallic spray may be directed against the ends of the wound capacitor segment so that leads may be attached to complete the capacitor.