A solid electrolyte capacitor includes a sintered body formed by sintering a molded body containing a metal powder; and a solid electrolyte layer disposed on the sintered body, wherein the solid electrolyte layer includes a first layer containing an electrolytic polymerization conductive polymer disposed on the sintered body and a second layer containing a chemical polymerization conductive polymer disposed on the first layer.

An electrolytic capacitor includes an anode body having a dielectric layer; a solid electrolyte layer in contact with the dielectric layer of the anode body; and an electrolytic solution. The electrolytic solution contains a solvent and a solute. The solvent contains a glycol compound. The solute contains an acid component and a base component. A mass of the acid component in the solute is greater than a mass of the base component in the solute. The acid component contains a first aromatic compound having a hydroxyl group.

An electrolytic capacitor includes an anode body having a dielectric layer; a solid electrolyte layer in contact with the dielectric layer of the anode body; and an electrolytic solution. The electrolytic solution contains a solvent and a solute. The solvent contains a glycol compound. The solute contains an acid component and a base component. A mass of the acid component in the solute is greater than a mass of the base component in the solute. The acid component contains a first aromatic compound having a hydroxyl group.

Anodes made from powder, such as tantalum powder, that is highly spherical is described. Methods to make the anodes are further described.

An electrolytic capacitor includes a capacitor element. The capacitor element includes an anode body and an electrolyte layer. The anode body has a dielectric layer on a surface of the anode body. The electrolyte layer is disposed to be adjacent to the dielectric layer. The electrolyte layer contains a first conductive polymer and a non-aqueous solvent. The first conductive polymer is a self-doped conductive polymer.

An electrolytic capacitor includes a capacitor element. The capacitor element includes an anode body and an electrolyte layer. The anode body has a dielectric layer on a surface of the anode body. The electrolyte layer is disposed to be adjacent to the dielectric layer. The electrolyte layer contains a first conductive polymer and a non-aqueous solvent. The first conductive polymer is a self-doped conductive polymer.

A chip-style conductive polymer capacitor and a method for packaging the same, wherein the capacitor includes a chip-style conductive polymer capacitor element, a substrate, and a packaging material layer; the chip-style conductive polymer capacitor element is provided on the substrate and includes an anode tantalum core, an anode terminal, an anode base electrode, a dielectric layer, a cathode layer, and a cathode base electrode; the anode tantalum core and the cathode layer are separated by the dielectric layer; the anode terminal is made of a tantalum metal chip or a tantalum-niobium alloy chip, and has a rectangle or rounded rectangle cross section. The packaging method herein enables a vacuum injection molding packaging structure or a spray coating packaging structure covering a full range of a packaging thickness from 0.3 to 10 mm, realizes arrayed packaging with high efficiency, and ensures the electrical performance and reliability of the product.

A chip-style conductive polymer capacitor and a method for packaging the same, wherein the capacitor includes a chip-style conductive polymer capacitor element, a substrate, and a packaging material layer; the chip-style conductive polymer capacitor element is provided on the substrate and includes an anode tantalum core, an anode terminal, an anode base electrode, a dielectric layer, a cathode layer, and a cathode base electrode; the anode tantalum core and the cathode layer are separated by the dielectric layer; the anode terminal is made of a tantalum metal chip or a tantalum-niobium alloy chip, and has a rectangle or rounded rectangle cross section. The packaging method herein enables a vacuum injection molding packaging structure or a spray coating packaging structure covering a full range of a packaging thickness from 0.3 to 10 mm, realizes arrayed packaging with high efficiency, and ensures the electrical performance and reliability of the product.

A method for producing an electrolytic capacitor includes: preparing an anode foil, a cathode foil, and a fibrous structure, the anode foil having a porous portion including a dielectric layer; preparing a conductive polymer-containing liquid, the conductive polymer-containing liquid containing a conductive polymer component and a first solvent;

forming a separator by removing at least a part of the first solvent after applying the conductive polymer-containing liquid to the fibrous structure; forming a capacitor element from the anode foil, the separator, and the cathode foil; and impregnating the capacitor element with an electrolytic solution. An electrical conductivity of the electrolytic solution at 30° C. is 3.0 mS/cm or more.

A method for producing an electrolytic capacitor includes: preparing an anode foil, a cathode foil, and a fibrous structure, the anode foil having a porous portion including a dielectric layer; preparing a conductive polymer-containing liquid, the conductive polymer-containing liquid containing a conductive polymer component and a first solvent;

forming a separator by removing at least a part of the first solvent after applying the conductive polymer-containing liquid to the fibrous structure; forming a capacitor element from the anode foil, the separator, and the cathode foil; and impregnating the capacitor element with an electrolytic solution. An electrical conductivity of the electrolytic solution at 30° C. is 3.0 mS/cm or more.