KR20010103942A - Making method of Aluminium electrolytic capacitor by using Al2O3 layer - Google Patents
Making method of Aluminium electrolytic capacitor by using Al2O3 layer Download PDFInfo
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- KR20010103942A KR20010103942A KR1020000025253A KR20000025253A KR20010103942A KR 20010103942 A KR20010103942 A KR 20010103942A KR 1020000025253 A KR1020000025253 A KR 1020000025253A KR 20000025253 A KR20000025253 A KR 20000025253A KR 20010103942 A KR20010103942 A KR 20010103942A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
- H01G9/045—Electrodes or formation of dielectric layers thereon characterised by the material based on aluminium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/07—Dielectric layers
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Abstract
알루미늄 전해 콘덴서의 양극과 음극 제작에 사용되는 알루미늄 호일의 표면에 공기와의 접촉에 의한 산화 작용으로 형성되는 산화 알루미늄층을 열처리 공정에 의해 인위적으로 두께가 증가되도록 형성시켜 유전체층으로도 작용할 수 있도록 하는 자연 산화 알루미늄(Al2O3) 층을 유전체층으로 하는 알루미늄 콘덴서의 제작 방법에 관한 것으로서, 알루미늄 콘덴서의 전극 제작에 사용하는 알루미늄 호일의 표면에 알루미늄(Al2O3) 유전체층을 형성시키는 공정에 있어서, 알루미늄 호일을 300 ~ 600 ℃ 의 온도로 10 분 내지 10 시간 동안 열처리 하는 열처리 공정(S20)을 화성 공정(S30) 이전에 수행하여 알루미늄 호일의 표면에 자연 산화 알루미늄(Al2O3) 층이 인위적으로 형성되도록 하는 것을 특징으로 한다.An aluminum oxide layer formed by an oxidation action by contact with air is formed on the surface of an aluminum foil used for fabricating an anode and a cathode of an aluminum electrolytic capacitor so as to be artificially increased in thickness by a heat treatment process so that it can act as a dielectric layer. The present invention relates to a method for manufacturing an aluminum capacitor having a natural aluminum oxide (Al 2 O 3 ) layer as a dielectric layer, the step of forming an aluminum (Al 2 O 3 ) dielectric layer on the surface of an aluminum foil used for electrode production of an aluminum capacitor. The heat treatment step (S20) of heat treating the aluminum foil at a temperature of 300 to 600 ° C. for 10 minutes to 10 hours is performed before the chemical conversion step (S30), so that a natural aluminum oxide (Al 2 O 3 ) layer is formed on the surface of the aluminum foil. It is characterized in that it is formed artificially.
Description
본 발명은 알루미늄 전해 콘덴서 제조 방법에 관한 것으로서, 알루미늄 전해 콘덴서의 양극과 음극 제작에 사용되는 알루미늄 호일의 표면에 공기와의 접촉에 의한 산화 작용으로 형성되는 산화 알루미늄층을 열처리 공정에 의해 인위적으로 두께가 증가되도록 형성시켜 유전체층으로도 작용할 수 있도록 하는 자연 산화 알루미늄(Al2O3) 층을 유전체층으로 하는 알루미늄 콘덴서의 제작 방법에 관한 것이다.The present invention relates to a method for manufacturing an aluminum electrolytic capacitor, wherein an aluminum oxide layer formed by an oxidation action by contact with air on an aluminum foil used for fabricating an anode and a cathode of an aluminum electrolytic capacitor is artificially thickened by a heat treatment process. The present invention relates to a method of fabricating an aluminum capacitor having a natural aluminum oxide (Al 2 O 3 ) layer as a dielectric layer, which is formed to increase so as to act as a dielectric layer.
알루미늄 전해 콘덴서는 99.9% 이상의 고순도 알루미늄 호일을 전극으로 하여 제조된 콘덴서이다. 알루미늄 전해 콘덴서의 제조에 사용되는 주요 재료인 알루미늄 호일은 호일의 표면에 유전체를 형성시키기 위해 다음과 같은 공정을 거치게 된다.An aluminum electrolytic capacitor is a capacitor manufactured using high purity aluminum foil of 99.9% or more as an electrode. Aluminum foil, the main material used in the manufacture of aluminum electrolytic capacitors, undergoes the following process to form a dielectric on the surface of the foil.
상기와 같이 제조된 알루미늄 호일을 사용하여 알루미늄 전해 콘덴서를 제조하는 공정은 다음과 같다.A process of manufacturing an aluminum electrolytic capacitor using the aluminum foil prepared as described above is as follows.
도 1은 알루미늄 전해 콘덴서의 제조 과정을 나타내는 순서도로서, 각 공정을 설명하면 다음과 같다.1 is a flowchart illustrating a manufacturing process of an aluminum electrolytic capacitor, which will be described below with reference to each step.
압연된 알루미늄 호일의 평활면을 전기화학적으로 표면을 에칭하여 실효면적을 증가시키는 에칭과정(S1), 에칭된 알루미늄 호일을 전기분해하여 알루미늄 호일의 표면에 유전체가 되는 산화 알루미늄(Al2O3)피막을 생성하는 화성과정(S2), 화성 과정을 거쳐 화성된 전극박을 제품의 용량에 맞는 일정한 규격으로 절단하고 인출단자를 접속한 후 음극박과 전해지(separator)를 넣어 동심원으로 절단하는 절단 과정(S3), 권취한 소자에 전해액을 넣는 함침 공정(S4)을 거치게 되고, 이후에는 조립 공정(S5)을 거쳐 완성되게 된다.Etching process (S1) to increase the effective area by etching the surface of the rolled aluminum foil electrochemically, aluminum oxide (Al 2 O 3 ) which becomes a dielectric on the surface of the aluminum foil by electrolysis of the etched aluminum foil The process of forming the film (S2), the process of forming the electrode foil is cut to a certain standard according to the capacity of the product, the cutting terminal is connected to the lead terminal and the cathode foil and the separator (separator) to cut into concentric circles (S3), the impregnation process (S4) which puts electrolyte solution into the wound element is passed through, and it completes after an assembly process (S5).
상기와 같은 과정을 거쳐 제조되는 알루미늄 콘덴서는 제조 과정을 수행하는 도중 알루미늄 호일과 공기중의 산소가 서로 반응하는 산화 작용에 의해 호일 표면에 산화 알루미늄(Al2O3)이 형성되게 된다.In the aluminum capacitor manufactured through the above process, aluminum oxide (Al 2 O 3 ) is formed on the surface of the foil by an oxidation action in which the aluminum foil and oxygen in the air react with each other during the manufacturing process.
산화 작용에 의해 형성되는 알루미늄(Al2O3) 층으로 인해 원래 예상한 두께의 유전체층보다 두꺼워져 완성된 알루미늄 콘덴서의 정확한 용량 계산을 할 수 없게되는 문제점이 있었다. 그러나 알루미늄 호일을 진공중에 유지 할 수 없기 때문에 이러한 산화 작용은 필수적으로 발생하게 된다.The aluminum (Al 2 O 3 ) layer formed by the oxidation action is thicker than the dielectric layer of the originally expected thickness, there was a problem that can not calculate the accurate capacity of the finished aluminum capacitor. However, since the aluminum foil cannot be maintained in vacuo, this oxidation occurs essentially.
본 발명은 상기한 문제점을 해결하기 위해 안출된 것으로서, 알루미늄 전해 콘덴서 제작시 사용하는 알루미늄 호일의 표면에 유전체층을 형성하는 공정을 수행하기 전에 열처리 공정을 추가하여 자연 산화 작용에 의해 생성되는 알루미늄(Al2O3) 층을 극대화시킴으로서 유전체 층으로도 활용할 수 있도록 한 자연 산화 알루미늄(Al2O3) 층을 유전체층으로 하는 알루미늄 콘덴서의 제작 방법을 제공하는 것을 목적으로 한다.The present invention has been made to solve the above problems, and before the process of forming a dielectric layer on the surface of the aluminum foil used in the production of aluminum electrolytic capacitors, adding a heat treatment process to produce aluminum (Al) 2 O 3) is a natural aluminum oxide to take advantage of maximizing the sikimeuroseo layer dielectric layer (Al 2 O 3) layer object of the present invention is to provide a manufacturing method of an aluminum capacitor with a dielectric layer.
상기 목적을 달성하기 위해 본 발명 자연 산화 알루미늄(Al2O3) 층을 유전체층으로 하는 알루미늄 콘덴서의 제작 방법은, 알루미늄 콘덴서의 전극 제작에 사용하는 알루미늄 호일의 표면에 알루미늄(Al2O3) 유전체층을 형성시키는 공정에 있어서, 알루미늄 호일을 300 ~ 600 ℃ 의 온도로 10 분 내지 10 시간 동안 열처리 하는 열처리 공정을 화성 공정 이전에 수행하여 알루미늄 호일의 표면에 자연 산화 알루미늄(Al2O3) 층이 인위적으로 형성되도록 하는 것을 특징으로 한다.Production of Aluminum Capacitors way to the nature of aluminum oxide present invention to achieve the above object (Al 2 O 3) layer with the dielectric layer, the aluminum on the surface of the aluminum foil used in the electrode production of aluminum capacitor (Al 2 O 3) dielectric layer In the step of forming a, the heat treatment step of heat-treating the aluminum foil at a temperature of 300 ~ 600 ℃ for 10 minutes to 10 hours before the chemical conversion process to form a natural aluminum oxide (Al 2 O 3 ) layer on the surface of the aluminum foil It is characterized in that it is formed artificially.
도 1은 종래의 기술에 따른 알루미늄 전해 콘덴서의 제조 과정을 나타내는 순서도.1 is a flow chart showing a manufacturing process of an aluminum electrolytic capacitor according to the prior art.
도 2는 본 발명에 따른 알루미늄 전해 콘덴서의 제조 과정을 나타내는 순서도.2 is a flow chart showing a manufacturing process of the aluminum electrolytic capacitor according to the present invention.
본 발명을 상세히 설명하면 다음과 같다.The present invention is described in detail as follows.
알루미늄 전해 콘덴서의 양극과 음극을 제조하는 데 사용하기 위해 알루미늄호일을 유전체를 형성하는 화성 과정에 투입하는 것은 종래의 기술과 동일하다. 그러나 알루미늄 호일은 제조된 직후부터 공기에 노출되고, 노출에 의해 공기중의 산소와 결합하여 산화 알루미늄(Al2O3) 층이 형성되는 산화 작용이 진행된다.Injecting aluminum foil into the chemical conversion process to form a dielectric for use in manufacturing the anode and cathode of an aluminum electrolytic capacitor is the same as in the prior art. However, the aluminum foil is exposed to air immediately after its manufacture, and an oxidation action is performed in which an aluminum oxide (Al 2 O 3 ) layer is formed by bonding with oxygen in the air.
이러한 산화 작용이 발생되는 알루미늄 호일을 노에 투입하고, 노의 온도를 300 ~ 600 ℃ 로 유지하는 열처리 공정(S20)을 수행하도록 한다. 열처리 공정(S20) 수행 중 산화 작용을 촉진시켜 산화 알루미늄(Al2O3) 층을 증가시키기 위해서는 노의 내부로 다량의 산소를 주입시키는 것이 바람직하다.Into the furnace, the aluminum foil is generated such an oxidation action, to perform a heat treatment step (S20) to maintain the temperature of the furnace at 300 ~ 600 ℃. In order to increase the aluminum oxide (Al 2 O 3 ) layer by promoting oxidation during the heat treatment process (S20), it is preferable to inject a large amount of oxygen into the furnace.
산화 알루미늄(Al2O3) 층이 형성된 알루미늄 호일을 화성 공정(S30)을 수행하게 되면 산화 알루미늄(Al2O3) 층의 상부에는 유전체층이 형성된다. 이때 형성되는 유전체층은 화성 공정(S30)의 수행시 사용하는 sol-gel 용액의 종류에 따라 Al2O3, Nb2O5, TiO2등의 여러가지로 변화할 수 있다.When the aluminum foil on which the aluminum oxide (Al 2 O 3 ) layer is formed is subjected to the chemical conversion process (S30), a dielectric layer is formed on the aluminum oxide (Al 2 O 3 ) layer. In this case, the dielectric layer formed may vary in various ways, such as Al 2 O 3 , Nb 2 O 5 , and TiO 2 , depending on the type of sol-gel solution used in the chemical conversion process (S30).
알루미늄 호일의 상단부에는 산화 알루미늄(Al2O3) 층이 두껍게 형성되어 있고, 그 상부에 Al2O3, Nb2O5, TiO2등의 유전체층이 형성되면 유전체층의 하부의 산화 현상에 의해 형성된 산화 알루미늄(Al2O3) 층도 유전체층으로 작용하게 된다.A thick layer of aluminum oxide (Al 2 O 3 ) is formed on the upper end of the aluminum foil, and when a dielectric layer such as Al 2 O 3 , Nb 2 O 5 , TiO 2 is formed on the upper portion of the aluminum foil, it is formed by oxidation under the dielectric layer. The aluminum oxide (Al 2 O 3 ) layer also serves as a dielectric layer.
화성 공정(S30)을 수행한 이후의 공정은 종래의 콘덴서 제조 기술과 rkxdl 절단 공정(S40), 함침공정(S50), 조립공정(S60)으로 이루어진다.The process after performing the chemical conversion process (S30) is made of a conventional capacitor manufacturing technology and rkxdl cutting process (S40), impregnation process (S50), assembly process (S60).
상기와 같은 본 발명에 의하면 알루미늄 호일의 표면에 산화 작용에 의해 형성되는 산화 알루미늄(Al2O3) 층을 열처리 공정을 이용하여 두텁게 형성시켜 기존의 화성 공정에 의해 형성되는 유전체층과 마찬가지의 유전체층으로 작용할 수 있도록 하여 유전체 두께를 증가시키는 효과를 갖는다.According to the present invention as described above, the aluminum oxide (Al 2 O 3 ) layer formed by the oxidation action on the surface of the aluminum foil thickly formed using a heat treatment process to the same dielectric layer formed by the conventional chemical conversion process It can act to increase the dielectric thickness.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101222436B1 (en) * | 2010-07-15 | 2013-01-15 | 성균관대학교산학협력단 | Aluminium electrode for high capacity flim capacitor having multilayered thin film structure and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101222436B1 (en) * | 2010-07-15 | 2013-01-15 | 성균관대학교산학협력단 | Aluminium electrode for high capacity flim capacitor having multilayered thin film structure and preparation method thereof |
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