The solid electrolytic capacitor having improved properties in the case of high voltages

摘要

A solid electrolytic capacitor, which a sintered porous anode, a dielectric layer, which covers the anode, and a solid electrolyte, the dielectric layer, covered, is provided. The anode is made of a finely divided powder (for example, spherulitic or at an angle) with a relatively high specific charge. Despite the use of powders with such a high specific charge, high voltages by a combination of features, which is located on the formation of the anode and of the solid electrolyte, are achieved. For example, relatively high pressing densities and sintering temperatures are used, in order to be relatively large " sintering bridges " between adjacent agglomerated particles, which is to achieve the dielectric layer in the vicinity of the bridge less susceptible to failure in the case of high formation voltages makes. The manner in which the solid electrolyte is formed, is also helpful, so that the resulting capacitor can operate at high voltages, and it is true that the solid electrolyte is composed of a plurality of prepolymerized conductive polymer particles is formed which, the use of energy-rich radicals (for example, fe²⁺- , or fe³⁺-Ions), which would otherwise lead to degradation of the dielectric, minimize.