A method of manufacturing a high-reliability electrolytic capacitor

Abstract

The invention provides a method for manufacturing a high-reliability electrolytic capacitor, comprising the following steps: pressing tantalum metal powder into an anode tantalum block and sintering at a high temperature; etching the surface of the anode tantalum block; cleaning the surface of the anode tantalum block with deionized water The remaining acidic solution is then dried in a high-temperature oven; electrochemically formed in the electrolyte; the residual electrolyte on the surface of the anode tantalum block is cleaned with deionized water; the anode tantalum block is heat-treated in a high-temperature oven; the anode tantalum block After cooling, it is put into the electrolyte solution for supplementary forming treatment. The thermal release-hydration and filling method is used to effectively suppress the expansion of the defect point, and then the surface of the oxide film is densely treated to shield the defect point, effectively shielding the leakage current channel in the dielectric oxide film, ensuring The withstand voltage performance of the product effectively reduces the probability of capacitor breakdown and improves the stability and reliability of the product.

Description

technical field [0001] The invention belongs to the technical field of electrolytic capacitor manufacturing, and in particular relates to a manufacturing method of a high-reliability electrolytic capacitor. Background technique [0002] With the rapid development of modern electronic complete systems, the performance indicators of components in the fields of aviation, aerospace, communications and microelectronics are also getting higher and higher. Electrolytic capacitors are one of the important components of electronic technology, especially tantalum electrolytic capacitors occupy an important position in the capacitor industry due to their advantages of volume efficiency, high reliability and good stability. Due to the continuous improvement of the power of modern electronic circuits, the voltage and frequency of the circuits used by electronic components have been greatly improved. It is required that the electronic components in the circuit can withstand the impact of ...

AI Technical Summary

Problems solved by technology

These methods generally use the control of the conductivity, temperature and current density of the forming solution to produce a high-reliability dielectric oxide film, but the potential risks induced by inherent defects in the anode body cannot be avoided

Yuri Freeman proposed a method of reducing the carbon and oxygen content in the anode body, and then making a dielectric oxide film. The reliability of the tantalum capacitor made by this method has been significantly improved, but the process of removing oxygen and carbon for the second time is very complicated and cumbersome

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