Abstract: A solid electrolytic capacitor according to an aspect includes an anode body made of a valve metal, a dielectric layer formed on the anode body, a solid electrolyte layer formed on the dielectric layer, and a cathode body layer formed on the solid electrolyte layer. The solid electrolyte layer includes a first layer containing a first conductive polymer doped with a monomolecular dopant, and a second conductive polymer composed of a self-doped-type conductive polymer containing a plurality of side chains containing a functional group, the functional group being able to be doped, and a second layer formed on the first layer and containing a third conductive polymer doped with a polymer dopant; and the first conductive polymer is in contact with the third conductive polymer (the second layer).

Abstract: A solid electrolytic capacitor according to one aspect of the present disclosure includes: an anode body made of a valve metal; a dielectric layer formed on the anode body; and a solid electrolyte layer formed on the dielectric layer. The solid electrolyte layer includes: a first conductive polymer layer formed on the dielectric layer and heterogeneously doped with a monomolecular dopant; a block layer formed on the first conductive polymer layer; and a second conductive polymer layer formed on the block layer and composed of a self-doped-type conductive polymer containing a plurality of side chains containing a functional group that can be doped. The block layer blocks a migration of the self-doped-type conductive polymer from the second conductive polymer layer into the first conductive polymer layer and/or a migration of the self-doped-type conductive polymer from the second conductive polymer layer into pores of the porous anode body.

Abstract: A solid electrolytic capacitor according to an aspect includes an anode body made of a valve metal, a dielectric layer formed on the anode body, a solid electrolyte layer formed on the dielectric layer, and a cathode body layer formed on the solid electrolyte layer. The solid electrolyte layer includes a first layer containing a first conductive polymer doped with a monomolecular dopant, and a second conductive polymer composed of a self-doped-type conductive polymer containing a plurality of side chains containing a functional group, the functional group being able to be doped, and a second layer formed on the first layer and containing a third conductive polymer doped with a polymer dopant; and the first conductive polymer is in contact with the third conductive polymer (the second layer).

Abstract: A surface-mounting thin type capacitor includes a capacitor element having a shape of and two end portions which form a side surface of the capacitor element. Two anode terminals are disposed on lower surfaces of the end portions along the side surface to form a mounting surface substantially perpendicular to the side surface. A cathode terminal is disposed at a middle part of the capacitor element to form the mounting surface together with the anode terminals. The cathode terminal is not between the anode terminals spatially and thereby manufacturing process of the capacitor is simplified and it is easy to change the intended use of the capacitor.

Abstract: In a solid electrolytic capacitor, a second dielectric layer made of an oxide of valve action metal is formed on first side, second side, and third side surfaces of an anode portion of an anode member. Between the second dielectric layer and a conductive polymer layer of the cathode layer, an electrical insulating resin layer is formed.

Abstract: An electrically conductive polymer composition contains an electrically conductive polymer obtained by using a polymer in the form of cations composed of repeating structural units of 3,4-ethylene dioxythiophene and polystyrene sulfonic acid as anions and further contains naphthalene sulfonic acid as an additive. A solid electrolytic capacitor 101 or a surface-mount transmission line element 102 has a polypyrrole conductive polymer layer 3 as a first solid electrolyte and a poly(3,4-ethylene dioxythiophene) conductive polymer layer 4 as a second solid electrolyte.

Abstract: An electrically conductive polymer composition contains an electrically conductive polymer obtained by using a polymer in the form of cations composed of repeating structural units of 3,4-ethylene dioxythiophene and polystyrene sulfonic acid as anions and further contains naphthalene sulfonic acid as an additive. A solid electrolytic capacitor 101 or a surface-mount transmission line element 102 has a polypyrrole conductive polymer layer 3 as a first solid electrolyte and a poly(3,4-ethylene dioxythiophene) conductive polymer layer 4 as a second solid electrolyte.

Abstract: In a solid electrolytic capacitor, a second dielectric layer made of an oxide of valve action metal is formed on first side, second side, and third side surfaces of an anode portion of an anode member. Between the second dielectric layer and a conductive polymer layer of the cathode layer, an electrical insulating resin layer is formed.

Abstract: In a surface-mount thin-profile capacitor including an aluminum foil as a base member composed of an aluminum core and a pair of etched layers covering opposite surfaces of the aluminum core, a resist resin is formed at a boundary between an anode as each of opposite end portions of the aluminum foil and a cathode formed at a center area of each of opposite surfaces of the aluminum foil. The resist resin separates and isolates the etched layer on the side of the anode and a conductive polymer layer from each other. If a part of the conductive polymer layer climbs up onto the resist resin, the climbing part of the conductive polymer layer is covered with an additional resist resin.

Abstract: An electrically conductive polymer composition contains an electrically conductive polymer obtained by using a polymer in the form of cations composed of repeating structural units of 3,4-ethylene dioxythiophene and polystyrene sulfonic acid as anions and further contains naphthalene sulfonic acid as an additive. A solid electrolytic capacitor 101 or a surface-mount transmission line element 102 has a polypyrrole conductive polymer layer 3 as a first solid electrolyte and a poly(3,4-ethylene dioxythiophene) conductive polymer layer 4 as a second solid electrolyte.

Abstract: A surface-mounting thin type capacitor includes a capacitor element having a shape of and two end portions which form a side surface of the capacitor element. Two anode terminals are disposed on lower surfaces of the end portions along the side surface to form a mounting surface substantially perpendicular to the side surface. A cathode terminal is disposed at a middle part of the capacitor element to form the mounting surface together with the anode terminals. The cathode terminal is not between the anode terminals spatially and thereby manufacturing process of the capacitor is simplified and it is easy to change the intended use of the capacitor.

Abstract: A valve metal powder with optimized particle size distribution, and a solid electrolytic capacitor which uses this is provided. A valve metal powder for a solid electrolytic capacitor is used which is an agglomerate powder to be used for manufacturing an anode with a structure in which valve metal powder is formed in a layer on a valve metal base material, and contains at least 90% of all the powder within a particle size range of 1 ?m to 50 ?m. It is desirable that at least 90% of all the powder is contained within a particle size range of 1 ?m to 30 ?m. Moreover, preferably the product of BET specific surface area and specific gravity (d25) is greater than 17 m2/g.

Abstract: In a surface-mount thin-profile capacitor including an aluminum foil as a base member composed of an aluminum core and a pair of etched layers covering opposite surfaces of the aluminum core, a resist resin is formed at a boundary between an anode as each of opposite end portions of the aluminum foil and a cathode formed at a center area of each of opposite surfaces of the aluminum foil. The resist resin separates and isolates the etched layer on the side of the anode and a conductive polymer layer from each other. If a part of the conductive polymer layer climbs up onto the resist resin, the climbing part of the conductive polymer layer is covered with an additional resist resin.

Abstract: An Nb solid electrolytic capacitor is disclosed which comprises: an anode body made from an Nb-based material, the anode body having a nitrogen content of about 7,500 ppm to about 47,000 ppm; a dielectric layer formed over the surface of the anode body; a solid electrolyte layer formed on the dielectric layer; and a cathode body formed on the surface of the solid electrolyte layer. The Nb solid electrolytic capacitor shows small bias dependence. A method for preparing the same is also disclosed which comprises steps of: forming an anode body from an Nb-based material, the anode body having a nitrogen content of about 7,500 ppm to about 47,000 ppm; forming a dielectric layer over the surface of the anode body; forming a solid electrolyte layer on the dielectric layer; and forming a cathode body on the electrolyte layer.

Abstract: An Nb solid electrolytic capacitor is disclosed which comprises: an anode body made from an Nb-based material, the anode body having a nitrogen content of about 7,500 ppm to about 47,000 ppm; a dielectric layer formed over the surface of the anode body; a solid electrolyte layer formed on the dielectric layer; and a cathode body formed on the surface of the solid electrolyte layer. The Nb solid electrolytic capacitor shows small bias dependence. A method for preparing the same is also disclosed which comprises steps of: forming an anode body from an Nb-based material, the anode body having a nitrogen content of about 7,500 ppm to about 47,000 ppm; forming a dielectric layer over the surface of the anode body; forming a solid electrolyte layer on the dielectric layer; and forming a cathode body on the electrolyte layer.

Abstract: A solid electrolytic capacitor is made of a first chemical polymer layer having an anode, a cathode, and a dielectric, the cathode being formed first on a surface of the dielectric, and a secondary electrolytic polymer layer formed on a surface of the primary chemical polymer layer by performing electrolytic polymerization in a predetermined solution. This solid electrolytic capacitor includes a secondary electrolytic polymer layer formed by performing electrolytic polymerization in a solution obtained by adding to the predetermined solution a supporting electrolyte having a surface active effect with respect to a solvent in the predetermined solution and a supporting electrolyte having no surface active effect with respect to the solvent in the predetermined solution.