Patent ID: 8134827
Filing Date: 2012-03-13
Classification: H01G

Abstract:
1. A solid electrolytic capacitor, comprising: an anode which is mainly formed of at least one of a valve metal and an alloy thereof; an anode lead terminal a part of which is buried in a side surface of the anode; a dielectric layer that is formed on surfaces of the anode and is mainly formed of an oxide; a conducting polymer layer that is formed on the dielectric layer; a cathode layer that is formed on the conducting polymer layer corresponding to an outer circumferential surface of the anode, the cathode layer comprising: a thermal expansion layer that is provided on the side surface of the anode as well as on the conducting polymer layer corresponding to a part of the outer circumferential surface continuing from the side surface; and a resin outer package provided so as to cover the anode, the dielectric layer, the cathode layer, and the thermal expansion layer, wherein a thermal expansion coefficient in a temperature range lower than a glass transition temperature of the thermal expansion layer is larger than a thermal expansion coefficient in a temperature range lower than a glass transition temperature of each of the silver paste layer and the resin outer package, and wherein the resin outer package is disposed between the anode lead terminal and the thermal expansion layer as well as between the cathode lead terminal and the thermal expansion layer, and the anode lead terminal and the cathode lead terminal are not in contact with the thermal expansion layer.