Hermetically-sealed solid electrolyte tantalum capacitor packaged through ceramic

Abstract

The invention provides a hermetically-sealed solid electrolyte tantalum capacitor packaged through ceramic. A lower side of an anode tantalum core is fixedly welded with a Ni strip and is then bounded in a ceramic casing through bonding silver slurry, the anode tantalum core is connected with a cathode leading-out end fixed on the ceramic casing, an anode tantalum wire on the anode tantalum core is connected through a connection leading wire with an anode leading-out end fixedly arranged on the ceramic casing, and a cover board is sealed at a top end of the ceramic casing and is in fixed sealing connection with the ceramic casing. According to the capacitor, the Ni strip is added between the anode tantalum core and the bonding silver slurry, the anode tantalum core is connected with the casing by utilizing the soft Ni strip to release temperature stress generated by the anode tantalum core, influence on electrical performance parameters of products can be avoided, high temperature resistance capability of the capacitor is improved, a problem that a capacitor in the prior art can not operate in the high temperature work environment is solved, by utilizing ceramic parallel seam welding, the chip tantalum electrolytic capacitor is sealed, and the hermetically-sealed solid electrolyte tantalum capacitor can normally operate even in the environment with temperature of 180 DEG C.

Description

technical field [0001] The invention relates to a ceramic-encapsulated fully-sealed capacitor with a maximum working temperature of up to 180°C, in particular to a ceramic-encapsulated fully-sealed solid electrolyte tantalum capacitor. Background technique [0002] Tantalum electrolytic capacitors mainly play the electrical functions of energy storage, filtering, bypass, coupling, decoupling, and transfer in electronic circuits. They are an indispensable part of electronic circuits. In industries such as drilling, geological exploration, space exploration, and space vehicles, the ambient temperature of the equipment far exceeds 125°C. The existing tantalum electrolytic capacitors can no longer meet the requirements for the use of electronic equipment in the above fields. Although ceramic capacitors and glass glaze capacitors Such inorganic capacitors can be used in high temperature environments above 125°C, but the capacitance of these capacitors is too small to replace the ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the present invention provides a fully sealed solid electrolyte tantalum capacitor with a ceramic package. The fully sealed solid electrolyte tantalum capacitor with a ceramic package adds a nickel strip between the anode tantalum core and the bonding silver paste, and utilizes nickel With the release of the temperature stress generated by the tantalum core, the high temperature resistance of the capacitor is improved, and the problem that the existing capacitor cannot meet the high temperature working environment is solved

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