Patent ID: 8218293

Claim:
An electrolytic capacitor, comprising: an anode foil having a dielectric coating film and a conductive polymer layer formed successively on a surface thereof; a cathode foil having a conductive polymer layer formed on a surface thereof; an anode lead tab electrically connected to one surface of said anode foil; a cathode lead tab electrically connected to one surface of said cathode foil; and a protection member disposed on the surface(s) of said anode foil and/or said cathode foil, wherein said anode foil and said cathode foil are wound with no separator being interposed therebetween, and a first region provided with said protection member and a second region not provided with said protection member are present between said anode foil and said cathode foil that are wound, and said first region is at least one of a region covering said anode lead tab connected to said anode foil, a region covering said cathode lead tab connected to said cathode foil, a region covering a rear side of said anode foil at a connection portion between said anode lead tab and said anode foil, and a region covering a rear side of said cathode foil at a connection portion between said cathode lead tab and said cathode foil; wherein said first region includes all of the region covering said anode lead tab connected to said anode foil, the region covering said cathode lead tab connected to said cathode foil, the region covering the rear side of said anode foil at the connection portion between said anode lead tab and said anode foil, and the region covering the rear side of said cathode foil at the connection portion between said cathode lead tab and said cathode foil.