Electrolytic capacitor and method for manufacturing same
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsTatsuji Aoyama, Kazuhiro Takatani, Kazunari Imamoto, Yoshiaki Ishimaru
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Abstract
An electrolytic capacitor includes a capacitor element, a solid electrolyte layer, an electrolyte solution. The capacitor element has an anode foil with a dielectric layer, and a cathode foil. The solid electrolyte layer is provided between the anode foil and the cathode foil. And the capacitor element is impregnated with the electrolyte solution. The cathode foil includes a covering layer that contains at least one metal selected from titanium and nickel or a compound of the at least one metal. And the solid electrolyte layer contains a conductive polymer, a polymer dopant, and a base component.
Claims13
An electrolytic capacitor comprising:
- a capacitor element including an anode foil and a cathode foil, the anode foil including a dielectric layer;
- a solid electrolyte layer provided between the anode foil and the cathode foil;
- and
- an electrolyte solution with which the capacitor element is impregnated, wherein:
- the cathode foil includes a covering layer that contains at least one metal selected from titanium and nickel or a compound including the at least one metal, and
- the solid electrolyte layer contains a conductive polymer, a polymer dopant, and a base component.
A method for manufacturing an electrolytic capacitor, the method comprising the steps of:
- forming a capacitor element including an anode foil on which a dielectric layer is formed, and a cathode foil;
- forming a solid electrolyte layer provided between the anode foil and the cathode foil;
- and
- impregnating with an electrolyte solution the capacitor element in which the solid electrolyte layer has been formed, wherein:
- a covering layer containing at least one metal selected from titanium and nickel or a compound including the at least one metal is formed on the cathode foil, and
- the solid electrolyte layer is formed by impregnating the capacitor element with a dispersion containing a conductive polymer, a polymer dopant, a base component, and a solvent and then removing at least a part of the solvent.
Dependencies are inferred from the claim text.