Patent ID: 9443659
Filing Date: 2016-09-13
CPC Classification: H01G

Claim Text:
1. A solid electrolytic capacitor comprising: a positive electrode configured by a sintered body of metal particles of tantalum or an alloy of tantalum, an outer surface of the positive electrode having a first surface and a second surface, and the second surface being located opposite to the first surface; a positive electrode lead having a first end portion embedded in the first surface of the positive electrode, and a second end portion protruding from the first surface, a dielectric layer formed on a surface of the positive electrode; and an electrolyte layer formed on the dielectric layer, wherein: a CV value, which is a value of product of capacitance and voltage, of the metal particles is 100000 μF·V/g or more, the positive electrode includes a surface region and an interior region, the surface region is configured by the outer surface of the positive electrode and a vicinity of the outer surface, and the interior region is an inner part of the positive electrode surrounded by the surface region, an average film thickness of the dielectric layer in the surface region is greater than an average film thickness of the dielectric layer in the interior region, the surface region includes a first region in a vicinity of a root of the positive electrode lead, and an average film thickness of the dielectric layer in the first region is greater than an average film thickness of the dielectric layer in the surface region other than the first region.