A composite electrode foil roll for manufacturing an electrolytic capacitor, including: bands of electrode foils; strips of an isolating material positioned along a width of the composite electrode foil roll at a plurality of locations. The plurality of locations are at equal distances and correspond to a length of an inner cavity of a case of the electrolytic capacitor. The bands of electrode foils and strips of an isolating material are alternating. A method of manufacturing the composite electrode foil roll including alternating bands of electrode foils and strips of an isolating material. The strips are positioned along a width of the composite electrode foil roll at repeated locations. The repeated locations are at equal distances corresponding to a length of an inner cavity of a case of the electrolytic capacitor.

A capacitor, an assembly comprising a capacitor and a busbar and a method for manufacturing a capacitor are disclosed. In an embodiment a capacitor includes a winding element and a terminal having a first part of a first material and a second part of a second material, the second material being different than the first material, wherein the first part is electrically contacted to the winding element, and wherein the second part is an external contact of the capacitor.

A capacitor and a method for producing a capacitor are disclosed. In an embodiment, a capacitor includes a winding having a cathode foil, an anode foil, separators arranged therebetween and a projection region in which the cathode foil projects beyond the anode foil, wherein, in the projection region, a plurality of layers of the cathode foil are arranged to form a bundle and are directly electrically connected to one another.

An electronic component (for example, an electrolytic capacitor) includes an internal element (for example, a capacitor element) and a packaging (for example, a case). The production lot for the internal element includes a plurality of subunits. The packaging is provided with an identifier for identifying the plurality of subunits. By this configuration, it is possible to provide an electronic component capable of specifying production information, a production method for the electronic component, a management method for the electronic component, and a program. The identifier may be provided on the packaging as a display. Further, the identifier may be a one-dimensional code or a two-dimensional code.

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 electrolyte solution. The solid electrolyte layer includes a -conjugated conductive polymer. The electrolyte solution contains a solvent and a solute, and the solvent contains a glycol compound and a sulfone compound. A proportion of the glycol compound contained in the solvent is 10% by mass or more. A proportion of the sulfone compound contained in the solvent is 30% by mass or more. A total proportion of the glycol compound and the sulfone compound contained in the solvent is 70% by mass or more.

An electrode foil that progresses an enlargement of the surface area of a dielectric film and that barely causes cracks at the time of winding, a winding capacitor obtained by winding the electrode foil, an electrode foil manufacturing method, and a winding capacitor manufacturing method are provided. An electrode foil 1 is formed of a belt-like foil, and has a surface enlarged part 3, a core part 2, and a plurality of separation parts 4. The surface enlarged part 3 is formed on the surface of the foil, and the core part 2 is a part remained when excluding the surface enlarged part 3 within the foil. The separation part 4 extends on the surface enlarged part 3, dividing the surface enlarged part 3. The plurality of separation parts 4 share bending stress when the electrode foil 1 is wound, preventing concentration of stress.

An electrolytic capacitor includes a capacitor element and a liquid. The capacitor element includes an anode foil, a cathode foil disposed to face the anode foil, and a conductive polymer layer that is disposed between the anode foil and the cathode foil. A first layer including at least one selected from the group consisting of carbon, nickel, a nickel compound, titanium, and a titanium compound is disposed on the cathode foil. The conductive polymer layer includes a conductive polymer. A proportion of water in the liquid ranges from 0.1% by mass to 6.0% by mass, inclusive.

An electrolytic capacitor includes a capacitor element and an electrolyte solution. The capacitor element includes an anode foil, a cathode foil that is opposite to the anode foil, and a conductive polymer layer that is disposed between the anode foil and the cathode foil. An inorganic layer including at least one selected from the group consisting of conductive carbon, titanium, and nickel is disposed on the cathode foil. The conductive polymer layer includes a conductive polymer. A proportion of water in the electrolyte solution ranges from 0.1% by mass to 6.0% by mass, inclusive.

A capacitor component is disclosed. In an embodiment a capacitor component includes a winding having an oval core hole, which has a maximum diameter and a minimum diameter, wherein the minimum diameter is smaller than the maximum diameter, and wherein the winding is designed such that a deformation of the winding that occurs only locally is producible by a force acting punctiformly on the winding.

A gel electrolytic capacitor that can further improve withstand voltage is provided. The gel electrolytic capacitor includes: an anode foil; a cathode foil; and a gel electrolyte disposed between the anode foil and the cathode foil. The gel electrolyte consists of a polymer having three-dimensional (3D) network structure and an electrolyte solution held in said polymer. The polymer is formed by polymerizing 2-hydroxyethyl methacrylate or methacrylic acid. The electrolyte solution includes amines or quaternary cyclic amidinium.