Abstract: A solid electrolytic capacitor has an anode composed of a niobium substrate and a niobium nitride layer, and a dielectric layer composed of niobium oxide is formed on the surface of the niobium nitride layer. In the solid electrolytic capacitor, the nitrogen content based on the total weight of the niobium substrate, the niobium nitride layer, and the dielectric layer is preferably not less than 0.001% by weight nor more than 0.2% by weight. In another solid electrolytic capacitor, an anode is formed by sintering thermally treated niobium powder in a nitrogen atmosphere. A dielectric layer composed of niobium oxide is formed on the surface of the anode. In the solid electrolytic capacitor, the composition ratio X of the niobium powder (NbNX) is preferably not less than 0.05 nor more than 1.0.

Abstract: A solid electrolytic capacitor is provided with: an anode employing tantalum; a dielectric layer formed on said anode; and a cathode layer formed on said dielectric layer. The dielectric layer contains tantalum oxide and fluorine.

Abstract: A solid electrolytic capacitor has a structure in which a dielectric layer and a metal layer are formed in this order on the surface of an anode. The anode is composed of a porous sinter of tantalum particles. The dielectric layer is composed of a dielectric oxide film formed by anodizing the surface of the anode in an aqueous solution consisting of phosphoric acid, for example. The metal layer is formed by preparing a silver paste by mixing silver particles having an average particle diameter of not larger than 0.05 ?m, a protective colloid, and an organic solvent, and applying the silver paste on the surface of the dielectric layer, and drying the silver paste at a temperature of 150° C. or higher. Further, the anode is connected with an anode terminal, and the metal layer is connected with a cathode terminal through a conductive adhesive.

Abstract: A solid electrolytic capacitor of the present invention is provided with: an anode employing titanium; a dielectric layer formed on said anode, which comprises titanium oxide containing fluorine and at least one element selected from a group consisting of phosphorus, boron, sulfur, and tungsten; and a cathode layer formed on said dielectric layer.

Abstract: A solid electrolytic capacitor of the present invention is provided with: an anode employing tantalum; a dielectric layer formed on said anode, which comprises tantalum oxide containing fluorine; and a cathode layer formed on said dielectric layer.

Abstract: A solid electrolytic capacitor of the present invention is provided with: an anode employing titanium; a dielectric layer formed on said anode, which comprises titanium oxide containing fluorine and at least one element selected from a group consisting of phosphorus, boron, sulfur, and tungsten; and a cathode layer formed on said dielectric layer.

Abstract: An electrolytic capacitor of the invention includes an anode of nitrogen-doped titanium or titanium alloy and a dielectric layer formed by anodically oxidizing the anode on a surface of the anode.

Abstract: A solid electrolytic capacitor has a structure in which a dielectric layer, an electrolyte, a carbon layer, and a metal layer are formed in this order on the surface of an anode. The anode is composed of a porous sinter of tantalum particles. The dielectric layer is composed of a dielectric oxide film formed by anodizing the surface of the anode in an aqueous solution of phosphoric acid, for example. The electrolyte is composed of a conductive polymer, such as polypyrrole or polythiophene. The metal layer is formed by preparing a silver paste by mixing silver particles having an average particle diameter of not larger than 0.05 ?m, a protective colloid, and an organic solvent, and applying the silver paste on the surface of the carbon layer, and drying the silver paste at approximately 150° C. or higher.

Abstract: An electrolytic capacitor including one type of electrode selected from a group consisting of an electrode of at least one type of alloy selected from a group consisting of niobium alloy, titanium alloy, and tungsten alloy, an electrode of mixed sinter of niobium and aluminum, or a fluorine-doped electrode of niobium or niobium alloy and on a surface of each electrode a dielectric layer is formed by anodizing the electrode.

Abstract: A solid electrolytic capacitor of the invention includes a metal electrode employing a metal, a dielectric layer formed on a surface of the metal electrode and composed of an oxide of the metal, and a carbon material layer overlaid on the dielectric layer.

Abstract: A solid electrolytic capacitor has an anode composed of a niobium substrate and a niobium nitride layer, and a dielectric layer composed of niobium oxide is formed on the surface of the niobiumnitride layer. In the solid electrolytic capacitor, the nitrogen content based on the total weight of the niobium substrate, the niobium nitride layer, and the dielectric layer is preferably not less than 0.001% by weight nor more than 0.2% by weight. In another solid electrolytic capacitor, an anode is formed by sintering thermally treated niobium powder in a nitrogen atmosphere. A dielectric layer composed of niobium oxide is formed on the surface of the anode. In the solid electrolytic capacitor, the composition ratio X of the niobium powder (NbNX) is preferably not less than 0.05 nor more than 1.0.

Abstract: A solid electrolytic capacitor has a structure in which a dielectric layer, an electrolyte, a carbon layer, and a metal layer are formed in this order on the surface of an anode. The anode is composed of a porous sinter of tantalum particles. The dielectric layer is composed of a dielectric oxide film formed by anodizing the surface of the anode in an aqueous solution of phosphoric acid, for example. The electrolyte is composed of a conductive polymer, such as polypyrrole or polythiophene. The metal layer is formed by preparing a silver paste by mixing silver particles having an average particle diameter of not larger than 0.05 &mgr;m, a protective colloid, and an organic solvent, and applying the silver paste on the surface of the carbon layer, and drying the silver paste at approximately 150° C. or higher.

Abstract: A solid electrolytic capacitor has a structure in which a dielectric layer and a metal layer are formed in this order on the surface of an anode. The anode is composed of a porous sinter of tantalum particles. The dielectric layer is composed of a dielectric oxide film formed by anodizing the surface of the anode in an aqueous solution consisting of phosphoric acid, for example. The metal layer is formed by preparing a silver paste by mixing silver particles having an average particle diameter of not larger than 0.05 &mgr;m, a protective colloid, and an organic solvent, and applying the silver paste on the surface of the dielectric layer, and drying the silver paste at a temperature of 150° C. or higher. Further, the anode is connected with an anode terminal, and the metal layer is connected with a cathode terminal through a conductive adhesive.

Abstract: An electrolytic capacitor of the invention includes an anode of nitrogen-doped titanium or titanium alloy and a dielectric layer formed by anodically oxidizing the anode on a surface of the anode.

Abstract: An electrolytic capacitor of the invention includes one type of electrode selected from a group consisting of an electrode of at least one type of alloy selected from a group consisting of niobium alloy, titanium alloy, and tungsten alloy, an electrode of mixed sinter of niobium and aluminum, or a fluorine-doped electrode of niobium or niobium alloy and on a surface of the each electrodes a dielectric layer is formed by anodizing the electrode.

Abstract: A solid electrolytic capacitor of the invention includes a metal electrode employing a metal, a dielectric layer formed on a surface of the metal electrode and composed of an oxide of the metal, and a carbon material layer overlaid on the dielectric layer.