Surface processing solution for manufacturing solid electrolytic capacitor

Abstract

The invention provides surface processing solution for manufacturing a solid electrolytic capacitor. The surface processing solution at least comprises a coupling agent, wherein the coupling agent is used for connecting an anode surface oxidation film medium and a solid electrolyte in the solid electrolytic capacitor; the coupling agent is at least one of or combination of more of a titanate coupling agent, an aluminate coupling agent, a duplex metal coupling agent, a lignin coupling agent and a tin coupling agent; and the mass concentration of the coupling agent is 0.001 to 50 percent. Through the surface processing solution, the adhesion between the anode surface oxidation film medium and the solid electrolyte is more uniform and the adhering area and the adhering strength are larger, so that the capacity of the solid electrolytic capacitor is increased and the equivalent series resistance of the solid electrolytic capacitor is reduced; and at the same time, the protective effect on the anode surface oxidation film medium is better and the creepage qualification rate of the solid electrolytic capacitor is higher.

Description

【Technical field】 [0001] The invention relates to a solid electrolytic capacitor, in particular to a surface treatment solution for making a solid electrolytic capacitor. 【Background technique】 [0002] With the continuous development of science and technology, the market increasingly needs capacitors with small size, large capacity, low loss, low ESR, and high reliability. One of the ways to improve the performance of capacitors is to improve the conductivity, regularity, and stability of solid electrolytes. sex, flatness. In the production process, chemical oxidation or electrolytic oxidation polymerization is generally used to polymerize pyrrole, aniline, thiophene or its derivative monomers to form a solid electrolyte for electrolytic capacitors. Since the oxide film medium on the surface of the anode body and the solid electrolyte are two materials with different properties, it is difficult for the monomer of the solid electrolyte to attach to the surface of the oxide ...

AI Technical Summary

Problems solved by technology

[0004] When producing solid electrolytic capacitors in the prior art, chemical polymerization or chemical polymerization and electrochemical polymerization are directly used to prepare the conductive layer on the oxide film medium, so that the capacity of the capacitor produced in this way is often small, and the ESR is large, which cannot Meet high performance requirements

[0005] The Chinese invention applications No. CN1761007 and No. CN1761006 published on April 19, 2006 disclose a technical solution for manufacturing solid electrolytic capacitors by using coupling agent treatment. The capacity has been significantly improved, but its Coupling agent is limited to silane coupling agent