| abstract |
Anodic valve metal foils (23), roughened and provided with dielectricnlayers (25), and collector metal foils (24) (metal foils for collector) are laminatednalternately to cross with cathodic electroconductive polymer layers (26)ntherebetween. Anodic terminals (21) and cathodic terminals (22) are connectednwith the respective ends of the metal foils (23, 24). For the anodic valve metalnfoils (23), an aluminum foil with an unroughened internal bulk metal layer is used.nThe collector metal foil (24) is selected from the group consisting of an Al foilnsimilar to the anodic valve metal foil (23), an Ni foil, a Cu foil, and an aluminumnfoil including carbon. As a result, a four-terminal capacitor to provide highncapacitance, low impedance, high current-carrying capacity and less heatngeneration, as well as low equivalent series resistance and low equivalent seriesninductance, is obtained. |