Manufacturing method of laminated sheet type solid aluminum electrolytic capacitor

Abstract

The invention discloses a method for manufacturing a laminated sheet type solid aluminum electrolytic capacitor, which comprises the following steps of: cutting an aluminum foil, arranging barrier glue, forming a conductive polymer solid electrolyte layer, a conductive graphite layer and a conductive silver paste layer in a cathode region, and sequentially carrying out lamination, buffer layer formation, injection molding packaging, moisture absorption aging, reflow soldering treatment and the like. The buffer layer is formed on the surface of the aluminum foil, the thickness of the buffer layer is about 10-70 microns, and the coverage height of the buffer layer is that the whole aluminum foil area comprises a positive electrode area and a negative electrode area. Through the technical scheme, the ESR of the laminated solid aluminum electrolytic capacitor can be reduced, and the leakage current qualification rate can be improved, so that the total qualification rate of the laminated solid aluminum electrolytic capacitor is obviously improved, and the laminated solid aluminum electrolytic capacitor has remarkable economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of solid aluminum electrolytic capacitors, and in particular relates to a manufacturing method of a laminated chip type solid aluminum electrolytic capacitor. Background technique [0002] In recent years, as the market has put forward higher requirements for the miniaturization, portability, and high availability of smart products, so that the components also need to be continuously improved to meet the requirements of light weight. The same is true for capacitors. There is a growing need for miniaturization. The emergence and development of laminated chip solid-state aluminum electrolytic capacitors are in line with such market demands. Laminated chip solid aluminum electrolytic capacitor is a new type of electronic component that uses high molecular conductive polymer as capacitor cathode. It has a series of characteristics: high frequency, low impedance, excellent temperature and frequency characteristi...

AI Technical Summary

Problems solved by technology

[0003] At present, the manufacturing process of laminated chip solid aluminum electrolytic capacitors in the industry is complex, especially after the two key processes of packaging and reflow soldering, the core inside the capacitor is often subject to extrusion and thermal stress. It will cause gaps between the polymer layer, graphite layer and silver layer, and also damage the Al2O3 oxide film, which will directly lead to an increase in the ESR and leakage current of the capacitor, and the pass rate of the laminated capacitor is not ideal

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