Solid tantalum electrolytic capacitor and manufacturing method thereof

Abstract

The invention relates to a solid Ta electrolytic capacitor and a preparation method thereof, comprising a flat cuboid capacitor body which consists of a Ta core, an insulator and a metal shell, and a flat cathode dual-head leading wire and a flat anode dual-head leading wire which are arranged in a C-shape and respectively led out of the anode and cathode of the two ends of the body; in order to prepare the capacitor, firstly, the Ta core in flat cuboid shape is prepared; the C-shaped flat cathode dual-head leading wire and the anode dual-head leading wire are assembled with the Ta core; subsequently, resin is poured so as to form the capacitor by natural solidification. The electrolytic capacitor adopting the structure reduces the surface contact resistance of the product and has obviouseffect on reducing the high frequency ESR value of the product and improving the high frequency characteristic of the product as the capacitor body structure is changed into flat cuboid and the surface area of a Ta block is increased; after two ends of the leading wire are bent to parallel flat dual-head leading wire, most of the generated inductance can be counteracted, and the frequency range of the inductance appearing in the electronic circuit is delayed.

Description

technical field [0001] The invention relates to a solid tantalum electrolytic capacitor with valveable metal tantalum as an anode and a manufacturing method thereof. Background technique [0002] At present, the solid tantalum electrolytic capacitor packaged with metal is assembled from a cylindrical body composed of a tantalum core, an insulator, and a metal shell, and axial anode and cathode lead wires drawn from the anode and cathode at both ends of the body. When installing, install it on the circuit board through the two pole lead wires. Due to the product structure, when the working frequency is 200-300kHz, the product has inductive reactance, which seriously affects the application of the product in the high frequency field. Furthermore, since the material used to make the capacitor has its own resistance, the equivalent series resistance ESR generated in the application will cause heat loss in the capacitor medium; when the capacitor is charged, the voltage will ris...

AI Technical Summary

Problems solved by technology

Due to the product structure, when the working frequency is 200-300kHz, the product has inductive reactance, which seriously affects the application of the product in the high frequency field.

Furthermore, since the material used to make the capacitor has its own resistance, the equivalent series resistance ESR generated in the application will cause heat loss in the capacitor medium; when the capacitor is charged, the voltage will rise from 0, but due to the existence of the ESR resistance will produce The voltage drop causes a sudden change in the terminal voltage of the capacitor, which reduces the filtering effect of the capacitor; in occasions such as an oscillating circuit, ESR will also cause a change in the function of the circuit, resulting in serious consequences such as circuit failure or even damage.

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