Preparation method of high-voltage ultra-small-capacity non-solid electrolyte tantalum electrolytic capacitor

Abstract

The invention belongs to the technical field of tantalum capacitor preparation and particularly relates to a preparation method of a high-voltage ultra-small-capacity non-solid electrolyte tantalum electrolytic capacitor. The method is characterized in that pressing density is improved, a molding mode is changed, the increasing sintering temperature and sintering time are increased, so the strength of a tantalum core is enhanced, tantalum cores are not easy to fall off and have unfilled corners, impurities in tantalum powder are effectively removed, a tantalum core with excellent electrical performance is obtained through an improved forming method, aging process treatment is combined, so the voltage of the prepared non-solid electrolyte tantalum capacitor can reach 180V, the capacitance can reach 0.047 mu F, and the non-solid electrolyte tantalum capacitor has the characteristics of high voltage and ultra-small capacitance.

Description

technical field [0001] The invention belongs to the technical field of tantalum capacitor preparation, in particular to a preparation method of a high-voltage ultra-small capacity non-solid electrolyte tantalum electrolytic capacitor. Background technique [0002] The miniaturization of electronic machines has promoted the development of tantalum capacitors towards high voltage and large capacity on the one hand, and on the other hand, there is still a strong demand for small volume tantalum capacitors with high voltage and small capacity; non-solid electrolyte tantalum electrolytic capacitors are due to It has the advantages of small size, low leakage current, and high reliability, and has been widely used by circuit designers for a long time; however, due to the limitation of tantalum powder specific capacity and process technology, circuit designers can only use high-voltage and small-capacity capacitors Choose other capacitors such as ceramics and films. Due to the short...

AI Technical Summary

Problems solved by technology

[0002] The miniaturization of electronic machines has promoted the development of tantalum capacitors towards high voltage and large capacity on the one hand, and on the other hand, there is still a strong demand for small volume tantalum capacitors with high voltage and small capacity; non-solid electrolyte tantalum electrolytic capacitors are due to It has the advantages of small size, low leakage current, and high reliability, and has been widely used by circuit designers for a long time; however, due to the limitation of tantalum powder specific capacity and process technology, circuit designers can only use high-voltage and small-capacity capacitors Choose other capacitors such as porcelain and film. Because of the shortcomings of ceramic capacitors and aluminum electrolytic capacitors, they have large capacity errors. In some electronic circuits that require high precision, circuit designers are faced with the embarrassment of having no capacitors to choose from.