Solid tantalum capacitor and its manufacturing process

Abstract

Solid tantalum capacitor and its manufacturing process, including tantalum capacitor body, tantalum capacitor body including tantalum core, anode lead-out plate, cathode lead, metal shell and glass powder insulator, multiple tantalum cores are sequentially fixed on the metal shell by tin solder or conductive silver paste Among them, the metal shell is encapsulated by a glass powder insulator, the anode lead-out plate is installed in the metal shell and is located between the glass powder insulator and the tantalum core, the anode wire of the anode lead-out plate passes through the glass powder insulator as the anode lead of the capacitor, and the cathode lead is inserted into the metal In the shell and welded with the glass powder insulator and the metal shell, the tantalum core is a porous matrix formed by pressing a cuboid made of high-volume tantalum powder and sintered under high-temperature vacuum, and the tantalum core is covered by electroplating, coating or impregnation. There is a conductive polymer layer, and the tantalum core has jagged sides with alternating convex and concave. The invention greatly reduces the ESR value of the capacitor while the capacitor provides a large capacitance, and the reliability of the capacitor is higher.

Description

technical field [0001] The invention relates to a solid tantalum capacitor and a manufacturing process thereof, belonging to the field of solid tantalum capacitor manufacturing. Background technique [0002] Solid tantalum capacitor is a polar component. In microelectronic circuits, the unidirectional conductivity of its dielectric layer can be used for filtering, filtering out the residual AC ripple signal in the DC signal or making its amplitude smaller. The solid tantalum capacitor Tantalum capacitors are characterized by long life, high temperature resistance, high accuracy, excellent performance in filtering high-frequency harmonics, and various forms, excellent volume efficiency, with their unique characteristics, and their application range is becoming wider and wider. At present, with the development of electronic technology and military electronic components, as well as the need for miniaturization, light weight and high performance of modern weapons and equipment, ...

AI Technical Summary

Problems solved by technology

[0003] The existing tantalum capacitors either have a large ESR due to the non-solid electrolyte, or the capacity of the solid tantalum capacitors is not large due to the withstand voltage requirements of the solid tantalum capacitors. The reliability of the capacitor cannot meet the requirements of the whole machine. In order to solve this problem, we invented a solid tantalum capacitor

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