Abstract: Disclosed herein is a solid electrolyte capacitor with organic semiconductor which comprises a capacitor element, a solid electrolyte layer formed by heating and melting TCNQ complex salt, impregnating the TCNQ salt into the capacitor element and thereafter cooling and solidifying the same, a powder coating layer formed to cover an upper portion of the capacitor element through a clearance, and a sealing resin layer covering the powder coating layer for sealing the capacitor element.Since the powder coating layer is formed on the upper portion of the capacitor element through a clearance, it is possible to reduce influence exerted on the element by contraction or expansion caused by thermal stress which is applied in a soldering step. Consequently, it is possible to suppress increase of a leakage current.

Abstract: In a solid electrolyte capacitor, an improvement wherein the solid electrolyte is a mixture of at least two kinds of 7,7,8,8-tetracyanoquinodimethane complexes having cations different from each other which is obtained by cooling the mixture in a liquid state, the mixture being so stable to a high heat applied to the capacitor upon mounting the same on a circuit board using reflow solder. Further, a method for aging solid electrolyte capacitors is also disclosed wherein a higher aging temperature is employed.