Electrode leading-out method and packaging method of tantalum electrolytic capacitor

Abstract

The invention discloses an electrode leading-out method and a packaging method of a tantalum electrolytic capacitor. The electrode leading-out method comprises the following steps of S1, manufacturing an insulating protective layer outside an electrode body of the tantalum electrolytic capacitor; S2, exposing a cathode leading-out part at a cathode pre-leading-out part, and exposing a tantalum core leading-out end in an area where the tantalum core terminal is located; S3, respectively depositing metal layers on the exposed cathode leading-out part and the tantalum core leading-out end; and S4, respectively manufacturing external electrodes for surface mounting on the metal layer of the cathode leading-out part and the metal layer of the tantalum core leading-out end so as to respectively lead out the cathode and the anode. According to the method, the space utilization rate in a product is improved, the miniaturization and thinning of the product are facilitated, and meanwhile the electrical performance of the product can be improved.

Description

technical field [0001] The invention relates to the technical field of processing technology of electronic components, in particular to an electrode lead-out method and a packaging method of a tantalum electrolytic capacitor. Background technique [0002] Traditional chip electrolytic capacitors have two protruding anode leads and cathode leads bent toward the bottom surface of the encapsulating resin body. The anode and cathode leads are used to meet the SMD mounting requirements of printed circuit boards. For the electrode lead-out method of traditional chip electrolytic capacitors, refer to figure 1 , so that the product is assembled on the lead frame, the cathode 80 of the capacitor element is bonded to the cathode lead frame 81 through the conductive silver paste 82, and the cathode of the product is drawn out; the anode is welded by resistance welding, and the anode is drawn out; and then encapsulated by epoxy resin injection form a capacitor. Capacitors formed by tr...

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Problems solved by technology

[0003] The main purpose of the present invention is to overcome the deficiencies of the prior art and propose a method for drawing out electrodes of tantalum electrolytic capacitors to solve the problems of low space utilization and limited miniaturization and thinning of products in the existing way of drawing out electrodes of electrolytic capacitors

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