Producing method for solid niobium capacitor

Abstract

The method includes following steps: sintering; welding; forming; capsulizing; assembling; molding. The main technical character is: 1, the sinter cake is passivated by using cool pure water to reduce oxygen update rate of Niobium anode block; 2, in forming process the activate is made alternatively by using nitric acid solution and phosphoric acid solution, by this way the product in one hand gets the virtue of undercurrent due to using nitric acid solution, in other hand the product also has virtue of resistant to voltage due to using phosphoric acid solution; 3, in capsule process the cathode of niobium capacitor is made by using alternate immersion in manganous nitrate and silica gel solution.

Description

technical field [0001] The invention relates to the technical field of electronic component manufacturing, in particular to a method for manufacturing a solid niobium capacitor with large capacity per unit weight and good leakage current characteristics. Background technique [0002] Due to the development of miniaturization and high integration of IC or printed substrates, miniaturized and lightweight electronic equipment such as mobile phones, notebook computers, and electronic notebooks has become the mainstream of electronic equipment development, so it is necessary to develop miniaturized and large-capacity capacitors . Tantalum capacitors are widely used because of their excellent characteristics such as large capacity and stable performance. However, due to the relatively high atomic weight and density of tantalum, its unit weight is also relatively large, and its dielectric constant is also relatively high. [0003] Niobium and tantalum are congener elements, they ...

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Problems solved by technology

[0007] 3. This technology uses water vapor to decompose Mn(NO 3 ) 2 The manganese dioxide obtained after the solution is used as the cathode material. Due to the existence of the resistance of the manganese dioxide itself when the current passes through, it will cause it to generate heat and generate heat, and a corresponding reaction will occur, and finally three oxides will be generated as the temperature varies. Dimanganese is a low-valence manganese oxide, and these oxides have a large resistance, which will block the leakage current, thereby improving the leakage current of the product, but if too much heat cannot be exported, it will cause the product to fail. Burned out (the product has not had time to heal itself)

[0008] Therefore, the niobium capacitor manufactured by the above process has defects such as insufficient LC capacity characteristics of the capacitor, large dispersion rate, lack of practicability, and must be improved

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