A preparation method of a high-voltage ultra-small capacity non-solid electrolyte tantalum electrolytic capacitor

Abstract

The invention belongs to the technical field of tantalum capacitor preparation, in particular to a method for preparing a high-voltage ultra-small capacity non-solid electrolyte tantalum electrolytic capacitor. By increasing the compaction density, changing the molding method, and increasing the sintering temperature and sintering time, the strength of the tantalum core is improved. Reinforced, the tantalum core is not easy to drop blocks and corners, and the impurities in the tantalum powder are effectively removed. Through the improved formation method, a tantalum core with excellent electrical properties is obtained. Combined with the aging process, the prepared non-solid electrolyte tantalum The voltage of the capacitor can reach 180V, and the capacitance can reach 0.047μF, which 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...

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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.