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US 7,256,983 B2Granted
Electrolytic capacitor
AssigneesNippon Chemi-Con Corporation, Mitsubishi Chemical Corporation
InventorsMasashi Ozawa, Masayuki Takeda, Makoto Ue
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AssigneesNippon Chemi-Con Corporation, Mitsubishi Chemical Corporation
InventorsMasashi Ozawa, Masayuki Takeda, Makoto Ue
Estimating the term…
An electrolytic capacitor having a low impedance characteristic, and a high withstand voltage characteristic in the 100V class, provides excellent high temperature life and leakage characteristics. An electrolyte solution containing an aluminum tetrafluoride salt is used. Moreover, a ceramics coating layer or an insulating synthetic resin layer is formed at a contact portion with a sealing component of a rivet or a cathode leading means. Alternatively, a partial cross-linking peroxide butyl rubber with added peroxide as a cross-linking agent to a butyl rubber polymer containing isobutylene, isoprene, and divinylbenzene copolymer is used as the sealing member. The electrolytic capacitor of the present invention has a low impedance characteristic, a high withstand voltage characteristic, and an excellent high temperature life characteristic.
An electrolytic capacitor having a capacitor element fabricated by winding an anode electrode foil provided with anode leading means and a cathode electrode foil provided with cathode leading means via a separator and impregnating it with an electrolyte solution, an outer case for housing the capacitor element, and a sealing member for sealing an open part of the outer case, wherein the electrolyte solution comprises an aluminum tetrafluoride salt, and a ceramics coating layer is formed at a contact portion with the sealing member and the cathode leading means.
An electrolytic capacitor obtained by impregnating a capacitor element with an electrolyte solution containing an aluminum tetrafluoride salt, wherein the capacitor element is formed by winding an anode electrode foil with an anode leading terminal and a cathode electrode foil with a cathode leading terminal together with an intervening separator, housing the capacitor element in an cylindrical outer case with a bottom, and sealing an open end of the case by a sealing member with a rivet connecting said cathode leading terminal to said outside terminal, wherein a ceramics coating layer is formed at a contact portion of the rivet with the sealing component.
An electrolytic capacitor obtained by impregnating a capacitor element with an electrolyte solution containing an aluminum tetrafluoride salt, wherein the capacitor element is formed by winding an anode electrode foil with an anode leading terminal and a cathode electrode foil with a cathode leading terminal together with an intervening separator, housing the capacitor element in an cylindrical outer case with a bottom, and sealing an open end of the case by a sealing member with a rivet connecting said cathode leading terminal to said outside terminal wherein a ceramics coating layer is formed on said cathode leading terminal.
Dependencies are inferred from the claim text.