Disclosed is a capacitor element including: an anode body; a dielectric layer; and a cathode portion that includes a solid electrolyte layer and a cathode lead-out layer. The solid electrolyte layer contains an ionic liquid, and includes a first solid electrolyte and a second solid electrolyte layer. The first solid electrolyte contains a self-doped conductive polymer. The second solid electrolyte layer includes: a solid electrolyte 2A; a solid electrolyte 2B; and a solid electrolyte 2C. Out of a first interface between the first solid electrolyte and the solid electrolyte 2A, a second interface between the solid electrolyte 2A and the solid electrolyte 2B, a third interface between the solid electrolyte 2B and the solid electrolyte 2C, and a fourth interface between the solid electrolyte 2C and the cathode lead-out layer, the second interface or the third interface has a largest distribution amount of the ionic liquid.

A tantalum capacitor includes a tantalum body including a tantalum element body including tantalum powder, a conductive polymer layer disposed on the tantalum element body, the conductive polymer layer including a first filler, and a tantalum wire. The first filler may be an insulating polymer filler.

A tantalum capacitor includes a tantalum body including a tantalum element body including tantalum particles and a conductive polymer layer disposed on the tantalum element body, the tantalum body having a first surface, a second surface opposing the first surface in a first direction, and a plurality of side surfaces connecting the first surface and the second surface to each other, a molded portion surrounding the tantalum body, and a coating layer disposed on at least a portion of an edge on which the first surface of the tantalum body and the plurality of side surfaces meet each other. When a thickness of an edge portion of the conductive polymer layer is denoted by t1 and a thickness of the coating layer is denoted by t2, a sum of t1 and t2 satisfies 5.5 m or more and 100 m or less.

An electrolytic capacitor includes a capacitor element including an anode part and a cathode part, an exterior body sealing the capacitor element, a first external electrode electrically connected to the anode part and exposed from the exterior body, a second external electrode electrically connected to the cathode part and exposed from the exterior body, and a first base electrode connecting the anode part and the first external electrode. The first base electrode contains a first sintered metal, and the first sintered metal is in contact with an end surface of the anode part not covered with the exterior body and is in contact with the first external electrode. A relation 0.5W1/Tpc100 is satisfied, where Wp represents a width of the end surface of the anode part, and Tpc represents a thickness of the first sintered metal at a center of the width Wp.

The present invention relates to a capacitor having an electrically conductive housing with a housing inner surface and a housing interior substantially defined by the housing inner surface, at least one first electrode having a first polarity and being arranged in the housing interior, at least one separator element being arranged between the housing inner surface and the at least one first electrode, and an electrically conductive coating being arranged between the housing inner surface and the at least one separator element. The housing inner surface includes at least one recess, and the electrically conductive coating is arranged in the at least one recess.

To provide a thin film capacitor in which peeling-off of an electrode layer is less likely to occur. A thin film capacitor includes a metal foil having a roughened upper surface, a dielectric film covering the upper surface of the metal foil and having an opening for partly exposing the metal foil therethrough, a first electrode layer contacting the metal foil through the opening and further contacting the dielectric film, and a second electrode layer contacting the dielectric film without contacting the metal foil. With this configuration, both the first and second electrode layers can be disposed on the upper surface of the metal foil. In addition, the first electrode layer contacts not only the metal foil but also the dielectric film, making peeling of the first electrode layer less likely to occur.

A capacitor that is capable of exhibiting good electrical properties under a wide variety of different conditions is provided. The capacitor contains a capacitor element that includes a sintered porous anode body, a dielectric that overlies the anode body, and a solid electrolyte that overlies the dielectric and includes a conductive polymer. The capacitor also contains multiple exposed anode lead portions that are electrically connected to respective anode terminations and a planar cathode termination that is electrically connected to the solid electrolyte.

An electrode foil for an electrolytic capacitor includes an anode body having a porous portion and a core part continuous with the porous portion, a dielectric layer covering a surface of a metal skeleton forming the porous portion, wherein an interface layer including a first element is present between the metal skeleton and the dielectric layer, and the first element is at least one selected from the group consisting of sulfur, nitrogen, and phosphorus.

An improved process for forming powder, an anode of the powder and a capacitor comprising the powder is provided. The process comprises forming a dense aggregate comprising a powder and solvent in a pendular, funicular or capillary state and freeze drying the powder comprising high surface area.

A capacitor that is capable of exhibiting good electrical properties under a wide variety of different conditions is provided. The capacitor contains a capacitor element that includes a sintered porous anode body, a dielectric that overlies the anode body, and a solid electrolyte that overlies the dielectric and includes a conductive polymer. The capacitor also contains multiple exposed anode lead portions that are electrically connected to respective anode terminations and a planar cathode termination that is electrically connected to the solid electrolyte.