Method for producing solid sheet type electrolytic capacitor

Abstract

A manufacturing method for a solid plate electrolytic capacitor is to weld a strip Al foil to a stainless steel technical bar, the Al foil is coated with silicon resin or F resin to be divided into cathode and anode. The cathode part is immersed into a solution containing oxalamine and ammonium biphosphate plus 6-35v voltage, then again immersed in KMno4 solution to be dipped in a solution with Py and sulfosalt to form a pre-conductive layer on its surface as the anode, a stainless steel as the cathode to carry out constant current electrolyte in a mixed solution with Py and sulfosalt. The Al foil cathode is immersed in a solution containing oxalamine, ammonium biphosphate and sulfosalt plus 5-25v voltage to be coated with graphite and Ag to get single chip cores to be laminated, the anode is welded at that of an alloy lead frame, the cathode to the cathode to form a capacitor core to be molded and packaged with epoxy resin.

Description

technical field

[0001] The invention relates to a method for manufacturing an electrolytic capacitor, in particular to a method for manufacturing a solid chip electrolytic capacitor with a conductive polymer solid electrolyte with high conductivity. Background technique

[0002] In recent years, with the development of high-frequency computer and communication technology, newer and higher requirements have been put forward for the performance of electronic components. Specifically for capacitors, it is required that capacitors have small volume and large capacity, low equivalent series resistance (ESR), small loss tangent (tgδ), high upper limit operating frequency (about 1MHz), and wide operating temperature range (-55 ℃-+125℃), with chip structure and other performance characteristics; in addition, due to the rapid development of surface mount technology (SMT), the demand for chip electrolytic capacitors is increasing.

[0003] Because the traditional aluminum electrolyti...