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Method for manufacturing solid electrolytic capacitor suitable for high nominal voltage higher than 75V

A technology of rated voltage and solid electrolysis, which is applied in the direction of solid electrolytic capacitors, capacitor electrodes, capacitor parts, etc., can solve the problem of low capacity extraction rate of electrolytic capacitors, achieve omission of cleaning links, improve stability and reliability, and simplify production The effect of the method

Active Publication Date: 2014-06-11
CHINA ZHENHUA GRP XINYUN ELECTRONICS COMP ANDDEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, most of the dispersant in this dispersion is water, and the dielectric oxide film (such as tantalum oxide-free) of electrolytic capacitors is hydrophobic, so directly using the dispersant to infiltrate the surface of the oxide film will cause electrolysis The capacity lead-out rate of the capacitor is low, which brings many problems to the production

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  • Method for manufacturing solid electrolytic capacitor suitable for high nominal voltage higher than 75V

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Effect test

Embodiment 1

[0036] A method for manufacturing a solid electrolytic capacitor with a high rated voltage above 75V, comprising the following steps:

[0037] (1) Place the sintered capacitor anode body in a phosphoric acid solution with a concentration of 0.03%, firstly through a cross-flow boost, and then through an electrochemical reaction process of constant voltage drop-off, an amorphous dielectric oxidation is formed on the surface of the anode body membrane;

[0038] (2) Pretreatment: immerse the anode body with the dielectric layer formed in the diluent of silane coupling agent, and dry and cure in an environment of 200°C until a surface precoat is formed on the surface of the dielectric layer of the anode body;

[0039] (3) The first layer of conductive polymer film is obtained by impregnating a low-viscosity conductive polymer dispersion in a negative pressure-positive pressure environment, including:

[0040] A1, the anode body covered with surface pre-coating in 10 -2 Immerse in...

Embodiment 2

[0051] A method for manufacturing a solid electrolytic capacitor with a high rated voltage above 75V, comprising the following steps:

[0052] (1) Place the sintered capacitor anode body in a phosphoric acid solution with a concentration of 20%, firstly through a cross-flow boost, and then through an electrochemical reaction process of constant voltage drop-off, an amorphous dielectric oxidation is formed on the surface of the anode body membrane;

[0053] (2) Pretreatment: immerse the anode body with the dielectric layer formed in the silane coupling agent diluent, and dry and cure in an environment of 100°C until a surface precoat is formed on the surface of the dielectric layer of the anode body;

[0054] (3) The first layer of conductive polymer film is obtained by impregnating a low-viscosity conductive polymer dispersion in a negative pressure-positive pressure environment, including:

[0055] A1, the anode body covered with surface pre-coating in 10 -1 Immerse in a 50...

Embodiment 3

[0066] A method for manufacturing a solid electrolytic capacitor with a high rated voltage above 75V, comprising the following steps:

[0067] (1) Place the sintered capacitor anode body in a p-toluenesulfonic acid solution with a concentration of 10%. First, it undergoes a cross-flow boost, and then undergoes an electrochemical reaction process of constant voltage drop-off to form an amorphous state on the surface of the anode body. Dielectric oxide film;

[0068] (2) Pretreatment: immerse the anode body with the dielectric layer formed in the diluent of silane coupling agent, and dry and cure in an environment of 300°C until a surface precoat is formed on the surface of the dielectric layer of the anode body;

[0069] (3) The first layer of conductive polymer film is obtained by impregnating a low-viscosity conductive polymer dispersion in a negative pressure-positive pressure environment, including:

[0070] A1, the anode body covered with surface pre-coating in 10 -5 Imm...

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Abstract

The invention discloses a method for manufacturing a solid electrolytic capacitor suitable for the high nominal voltage higher than 75V. The method includes the following steps that an amorphous dielectric oxide film is formed on the surface of an anode body; a surface precoated layer is formed; a first layer conducting polymer film is acquired by soaking the anode body into low-viscosity conducting polymer dispersion liquid under a negative pressure-positive pressure environment; a middle bonding layer is prepared; a second layer conducting polymer film is prepared; the dry anode body is soaked into graphite and silver paste, and then spot welding, bonding and die pressing packaging are conducted. The method has the advantages that production efficiency of the capacitor is improved, and stability and reliability of the electrolytic capacitor are improved; the anode body is soaked into three kinds of dispersion liquid of different viscosities, and therefore electrostatic capacity of the capacitor is increased, ESR and the leakage current are reduced, and the puncture voltage of the capacitor is increased.

Description

technical field [0001] The invention relates to a manufacturing method suitable for a solid electrolytic capacitor with a high rated voltage above 75V, and belongs to the technical field of electrolytic capacitor manufacturing. Background technique [0002] With the acceleration of digitalization, miniaturization and light weight of electronic equipment, capacitors are required to have small size, large capacity, stable high-frequency performance, and strong ripple current resistance. Therefore, demands for reduction of leakage current, improvement of equivalent series resistance, and the like have further increased. Especially in recent years, with the increase in speed of signal processing circuits in electronic devices such as ultra-thin computers and smartphones, it is necessary to supply current to the signal processing circuits instantaneously, so solid electrolytic capacitors with small equivalent series resistance (ESR) in the high-frequency region The demand is inc...

Claims

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Application Information

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IPC IPC(8): H01G9/15H01G9/025H01G9/04
Inventor 田东斌王安玖张志光彭丹张勇贾新虎
Owner CHINA ZHENHUA GRP XINYUN ELECTRONICS COMP ANDDEV CO LTD
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