A solid electrolytic capacitor includes: a valve metal support having an anode terminal region and a cathode forming region and forming an anode part; and a cathode part provided in a cathode forming region of the valve metal support. The cathode part includes: a solid electrolyte layer that is disposed on a surface of a dielectric layer provided at least on the cathode forming region of the valve metal support and contains a conductive polymer; a waterproof seed layer that is disposed on a surface of the solid electrolyte layer and contains a conductive material; and a metal plating layer disposed on a surface of the waterproof seed layer. A catalytic metal having catalytic activity for plating is provided on the surface of the waterproof seed layer.

A tantalum capacitor includes a sintered tantalum body including tantalum powder, a conductive polymer layer disposed on the sintered tantalum body and including a first filler, a carbon layer disposed on the conductive polymer layer; and a tantalum body including a tantalum wire penetrating through at least a portion of each of the sintered tantalum body and the conductive polymer layer in a first direction. A ratio of an area of the first filler to an area of the conductive polymer layer is greater than 0.38 in a first cross-section partially overlapping the sintered tantalum body, among cross-sections perpendicular to the first direction.

A tantalum capacitor includes: a tantalum body including tantalum powder and having a tantalum wire exposed to one end surface; a molded portion having fifth and sixth surfaces opposing each other in a first direction, third and fourth surfaces opposing each other in a second direction, and first and second direction opposing each other in a third direction, and disposed to surround the tantalum body; an anode lead frame exposed to the second surface of the molded portion and electrically connected to the tantalum wire; and a cathode lead frame spaced apart from the anode lead frame and exposed to the second surface of the molded portion. The anode lead frame includes a first connection portion and a first bent portion, and the first bent portion forms an angle of inclination, ranging from 70? or more to 80? or less, to a side of the tantalum body with respect to the first connection portion.

A method for forming a solid electrolytic capacitor that includes an anode containing a valve metal composition, a dielectric overlying the anode, and a solid electrolyte overlying the dielectric is provided. The method comprises forming the dielectric by a process that includes placing the anode into contact with an electrolyte containing an ionic liquid and a valve metal salt and applying a potential difference between the anode and a counter electrode to form a dielectric oxide layer.

A conductive composite is provided, which includes a conductive conjugated polymer and a mixture. The mixture includes (a) boron oxide, and (b) sulfur-containing compound, nitrogen-containing compound, or a combination thereof. A capacitor is also provided, which includes an anode electrode, a dielectric layer on the anode electrode, a cathode electrode, and an electrolyte between the dielectric layer and the cathode electrode, wherein the electrolyte includes the described conductive composite.

Provided is a solid electrolytic capacitor having a lower leakage current than a conventional solid electrolytic capacitor. The solid electrolytic capacitor includes: an anode foil having a surface on which an oxide film is formed; a cathode foil; and a separator disposed between the anode foil and the cathode foil, wherein a solid electrolyte made of a conductive high-molecular weight compound in a fine particle form and a water-soluble high-molecular weight compound solution which is formed of a water-soluble high-molecular weight compound in a liquid form, water and alcohol having a nitro group are introduced into a gap formed between the anode foil and the cathode foil in a state where the water-soluble high-molecular weight compound solution surrounds the solid electrolyte.

A solid electrolytic capacitor includes a capacitor element. The capacitor element includes an anode body that is a porous sintered body, a dielectric layer disposed on a surface of the porous sintered body, an insulating material disposed on a surface of the dielectric layer, and a solid electrolyte layer disposed on a surface of the insulating material. The capacitor element has at least one corner part. An amount of the insulating material disposed in the at least one corner part of the capacitor element is larger than an amount of the insulating material disposed in a center part of the capacitor element.

Various embodiments of an electrical component and a method of forming such component are disclosed. The electrical component includes a substrate having a first major surface, a second major surface, and cavity disposed in the substrate. The cavity extends between the first major surface and a recessed surface. Tantalum material is disposed within the cavity. Further, the tantalum material includes tantalum particles. The electrical component also includes a dielectric layer disposed on the tantalum particles and an electrolyte cathode layer disposed on the dielectric layer. The electrical component further includes a cathode electrode disposed on the electrolyte cathode layer and over the cavity.

A capacitor case sealed to retain electrolyte; a sintered anode disposed in the capacitor case, the sintered anode having a shape wherein the sintered anode includes a mating portion; a conductor coupled to the sintered anode, the conductor sealingly extending through the capacitor case to a terminal disposed on an exterior of the capacitor case; a sintered cathode disposed in the capacitor case, the sintered cathode having a shape that mates with the mating portion of the sintered anode such that the sintered cathode matingly fits in the mating portion of the sintered anode; a separator between the sintered anode and the sintered cathode; and a second terminal disposed on the exterior of the capacitor case and in electrical communication with the sintered cathode, with the terminal and the second terminal electrically isolated from one another.

An improved solid electrolytic capacitor, and method of making the solid electrolytic capacitor, is described. The solid electrolytic capacitor comprises a pressed powder anode and a braided lead wire extending from the anode. A dielectric is on the anode and a cathode is on the dielectric.