Sheet type niobium oxide solid electrolyte capacitor and its manufacturing method

Abstract

The invention discloses a slice-typed niobium oxide solid electrolytic capacitor and a preparation method thereof; the capacitor comprises an epoxy resin encapsulation shell which is internally provided with a niobium monoxide capacitor substrate, a nickel-based tinning cathode eduction slice and a nickel-based tinning anode eduction slice; the niobium monoxide capacitor substrate is internally provided with an anode and the surface thereof is a cathode; the anode is internally provided with a Ta-wire eduction wire; the cathode of the niobium monoxide capacitor substrate is electrically connected with the nickel-based tinning cathode eduction slice; the Ta-wire anode eduction wire in the niobium monoxide capacitor substrate is welded on the nickel-based tinning anode eduction slice to form electric connection. The niobium oxide solid electrolytic capacitor has simple structure and convenient manufacture process; the prepared niobium oxide capacitor can be applied to various circuits such as switch power circuit for large surge voltage and current and the like; when accidental breakdown occurs, combustion or explosion does not occur; furthermore, continuous breakdown can be effectively avoided; compared with the Ta capacitor or pure Nb capacitor, the niobium oxide solid electrolytic capacitor is greatly improved on the reliability and safety.

Description

technical field [0001] The invention relates to the field of electronic components, in particular to a chip-type niobium oxide solid electrolytic capacitor and a manufacturing method thereof. Background technique [0002] Tantalum capacitors have the characteristics of high volume-to-capacity ratio, good temperature characteristics, and small leakage current. However, the shortcomings of tantalum capacitors are also very obvious; the anti-surge capability is the worst of all capacitors, and it is used in switching power supplies with high surges. Circuits, due to the presence of high voltage and current surges and high ripple currents in such circuits, a large derating is required to ensure safe use. In addition, the failure mode of tantalum capacitors is very dangerous; once broken down, the product will burn or explode rapidly, and even cause continuous breakdown and fire, which is a serious failure that any user can talk about. [0003] Niobium is the same as tantalum, a...

AI Technical Summary

Problems solved by technology

This is one of the inevitable defects of tantalum capacitors; in order to avoid the problems caused by this defect in actual use, only the rated voltage is greatly reduced in actual use, limited by the volume limit, the withstand voltage of the product is strictly limited, so , when the voltage of the tantalum capacitor is high, the shortcoming of the tantalum capacitor is too sensitive to the voltage is fully exposed

Niobium capacitors produced using pure niobium have the same defects as tantalum capacitors and are even worse in temperature characteristics

Images