KR20000019269A - Method for forming dielectric layer of high capacity using exmet to sol-gel method - Google Patents

Abstract

PURPOSE: A method for forming a dielectric layer of high capacity using EXMET to SIL-GEL method is provided to extend a capacity of a dielectric by using Exmet. CONSTITUTION: A method for forming a dielectric layer of high capacity using EXMET to SIL -GEL method relates to a method for extending a dielectric capacity when manufacturing an aluminum electrolytic capacitor by using a sol-gel method. Particularly, the method is to extend a surface of a dielectric and the dielectric capacity by using Exmet. The method comprises a hydrolysis process and an impregnation process. A hydrolysis process is performed to generate a dielectric material from sol solution. Exmet of a mesh type is impregnated with the sol solution.

Description

A high-capacity dielectric layer formation method using EGB in the method of method.

The present invention relates to a method of increasing the dielectric capacity when manufacturing an aluminum electrolytic capacitor by the sol-gel method, and to a method of expanding the dielectric capacity by expanding the surface area of the dielectric layer by using an Exmet (Exmet). .

An aluminum electrolytic capacitor is a capacitor manufactured by using a high purity aluminum thin film of 99.9% or more as an electrode. The process is as follows.

An etching process of electrochemically etching the surface of the aluminum thin film to increase the effective area, a chemical conversion process of impregnating the etched aluminum thin film into the chemical solution and electrolyzing to produce an aluminum oxide film that becomes a dielectric on the surface of the aluminum thin film, the chemical composition Process of cutting the electrode foil, which has been formed through the process, to a certain standard suitable for the capacity of the product, connecting the lead-out terminal, cutting the electrode foil and the electrolytic cell into a concentric circle, and impregnating the electrolyte into the wound element; It is divided into the assembly process of sealing the impregnated element and displaying the characteristics of the capacitor on the outside, and the reprocessing process of applying the rated voltage to the assembled product to stabilize the characteristic.

In the above process, the method of forming a dielectric by impregnating the chemical solution is used. The method of forming such a dielectric is improved to use the sol-gel method.

In the above-described method of generating a dielectric on an aluminum foil by the sol-gel method, a sol solution manufacturing process for preparing a sol solution for forming a dielectric on an aluminum foil, and a diluent for adding a diluent to a sol solution made in the above process to meet a required concentration Addition process, stabilizer addition process to add stabilizer to match reaction rate, hydrolysis process to produce dielectric material in sol solution, Sol solution impregnation process to impregnate sol solution after hydrolysis process in aluminum foil, sol solution It is composed of a drying step of drying the embedded aluminum foil at room temperature for 48 hours or a temperature of 200 ℃ to 350 ℃, and a heat treatment step of heat-treating the aluminum foil subjected to the drying process at a temperature of 550 ℃ to 650 ℃, Sol solution impregnation to impregnate the sol solution after the decomposition process into aluminum foil Since the surface area of the dielectric layer in the process is proportional to the area of the aluminum foil, the dielectric capacity is limited depending on the area of the aluminum foil.

The present invention has been made to solve the above-mentioned problems, and has an object of increasing dielectric capacity by obtaining a larger surface area using Exmet instead of an aluminum foil used as a base material for impregnation.

The present invention is to form a dielectric layer by the sol-gel method in order to achieve the above object, in the form of a mesh (mesh) in the sol solution subjected to the hydrolysis process after the hydrolysis process for producing a dielectric material in the sol solution Provided is a dielectric layer forming method using Exmet in a sol-gel method comprising an impregnation process in which (Exmet) is impregnated.

Referring to the configuration and operation of the present invention in detail.

The sol-gel method replaces aluminum foil with exmet instead of aluminum foil in the sol solution impregnation process, where the hydrolysis process followed by hydrolysis to produce dielectric material in sol solution is immersed in aluminum foil. . Since the exmet is a mesh like a net, it can coat a large amount of dielectric material when compared to aluminum foil when the sol solution is impregnated. The process after such an impregnation process is the same as the conventional sol-gel method.

In this way, the high-k dielectric material is impregnated and coated on the mesh-type exmet to coat more dielectric layers per unit area than aluminum foil.

As described above, the present invention has the effect of manufacturing a solid electrolyte capacitor larger than the capacitance of the aluminum foil by increasing the amount of the dielectric layer by coating more dielectric layers per unit area than the aluminum foil.

Claims (1)

In forming the dielectric layer by the sol-gel method, it includes an impregnation process of impregnating a mesh-type Exmet into the sol solution which has undergone the hydrolysis process after the hydrolysis process for producing the dielectric material in the sol solution. Dielectric layer forming method using Exmet in the sol-gel method, characterized in that.