KR100390071B1 - A producing method for outer protector of solid electrolytic capacitor using wax - Google Patents
A producing method for outer protector of solid electrolytic capacitor using wax Download PDFInfo
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- KR100390071B1 KR100390071B1 KR1019970070836A KR19970070836A KR100390071B1 KR 100390071 B1 KR100390071 B1 KR 100390071B1 KR 1019970070836 A KR1019970070836 A KR 1019970070836A KR 19970070836 A KR19970070836 A KR 19970070836A KR 100390071 B1 KR100390071 B1 KR 100390071B1
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- wax
- synthetic resin
- protective material
- electrolytic capacitor
- solid electrolytic
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- 239000003990 capacitor Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007787 solid Substances 0.000 title claims description 16
- 230000001012 protector Effects 0.000 title 1
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 30
- 239000000057 synthetic resin Substances 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 33
- 230000001681 protective effect Effects 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 abstract description 6
- 239000003792 electrolyte Substances 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 2
- 238000007598 dipping method Methods 0.000 abstract 1
- 239000007769 metal material Substances 0.000 abstract 1
- 229910052755 nonmetal Inorganic materials 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000001723 curing Methods 0.000 description 9
- 239000003822 epoxy resin Substances 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- 239000007784 solid electrolyte Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000011244 liquid electrolyte Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000011417 postcuring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
- 238000004018 waxing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/15—Solid electrolytic capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
본 발명은 왁스를 이용한 고체 전해 캐패시터의 외부 보호재 형성 방법에 관한 것으로, 보다 상세하게는 기존의 보호재를 사용하기 전에 응고가 빠른 왁스 보호재를 형성함으로써 합성 수지의 소체내 침투를 방지하는 개선된 외부 보호재 형성 방법에 관한 것이다.The present invention relates to a method of forming an external protective material for a solid electrolytic capacitor using wax, and more particularly, to an improved external protective material which prevents the penetration of a synthetic resin into the body by forming a wax solidifying material which has a quick solidification before using a conventional protective material. It relates to a forming method.
권취형 전해 캐패시터는 고용량으로 제조할 수 있어 여러 용도로 사용되어 왔으나, 고주파 특성과 높은 신뢰성이 요구되면서 전해질의 낮은 전도도와 액상 전해질의 불안정성으로 인한 단점 때문에 최근에는 전도도가 높은 고체 전해질을 사용하는 추세에 있다.The winding type electrolytic capacitors have been used for various purposes because they can be manufactured in high capacity. However, due to the drawbacks due to the low conductivity of the electrolyte and the instability of the liquid electrolyte, high-frequency characteristics and high reliability are required. Is in.
종래의 액체 전해질을 이용한 전해 캐패시터는 전해액을 주입한 다음 누액을 방지하고 내부 발생 가스의 배출과 외부 환경으로 부터 보호할 목적으로 고무 등으로 패킹하였으나, 고체 전해질을 이용한 전해 캐패시터는 액체가 누출되거나 내부 가스가 발생할 문제가 없기 때문에 합성 수지에 직접 침지하거나 소자를 케이스에 넣고 합성 수지를 주입하는 방법 등을 이용하여 외부 환경으로 부터 내부를 보호하여왔다(도 1 참조).Conventional electrolytic capacitors using liquid electrolyte are packed with rubber for the purpose of preventing leakage after injecting electrolyte solution and protecting the discharge of internally generated gases and external environment.However, electrolytic capacitors using solid electrolyte have a liquid leak or Since there is no problem of gas generation, the inside has been protected from the external environment by using a method of directly immersing in a synthetic resin or injecting a synthetic resin into a case (see FIG. 1).
그러나 상기 방법에 의해 고체 전해 캐패시터를 제조하는 방법에서는 보호재용 합성 수지의 경화 시간이 길기 때문에 합성 수지가 소자의 내부로 침투되게 되어 캐패시터의 전기적 특성을 상실하거나 저하시키는 문제가 있다.However, in the method for producing a solid electrolytic capacitor by the above method, since the curing time of the synthetic resin for the protective material is long, the synthetic resin penetrates into the inside of the device, which causes a problem of losing or decreasing the electrical characteristics of the capacitor.
구체적으로는 캐패시터의 용량값(capacitance)이 불규칙적이어서 캐패시터로서의 역할을 수행하기 어렵고, 캐패시터의 저항값이 매우 커져 노이즈 등의 문제를 일으킨다.Specifically, since the capacitance of the capacitor is irregular, it is difficult to function as a capacitor, and the resistance value of the capacitor is very large, resulting in problems such as noise.
이를 해결하기 위해서 합성 수지의 경화시간을 단축할 경우에는 열 경화도중 발생하는 발열 반응로 인한 열때문에 전해질이나 화성박에 악영향을 주어 신뢰성 등에 문제를 일으킬 수 있다.In order to solve this problem, if the curing time of the synthetic resin is shortened, heat due to the exothermic reaction occurring during the thermal curing may adversely affect the electrolyte or the chemical foil, which may cause reliability and the like.
이에 본 발명의 목적은 상기 합성 수지의 소자 침투를 방지할 목적으로 왁스를 이용한 고체 전해 캐패시터의 외부 보호재 형성 방법을 제공하고자 한다.Accordingly, an object of the present invention is to provide a method for forming an external protective material of a solid electrolytic capacitor using wax in order to prevent device penetration of the synthetic resin.
도 1은 종래의 방법에 의해 전해 캐패시터에 외부 보호재를 형성하는 방법을 도시한 도면, 및1 is a view showing a method of forming an external protective material on an electrolytic capacitor by a conventional method, and
도 2는 본 발명에 의해 왁스 보호재를 형성한 다음 합성 수지 보호재를 형성한 방법을 도시한 도면이다.2 is a view showing a method of forming a synthetic resin protective material after forming a wax protective material according to the present invention.
*도면의 주요한 부위에 대한 간단한 부호의 설명** Description of simple symbols on the main parts of the drawings *
1... 고체 전해질층을 형성한 캐패시터 소자1. Capacitor element with solid electrolyte layer formed
2... 가열 융해시킨 왁스 3... 히터2 ... heat melted
4... 냉각 고화된 왁스(보호재1) 5... 케이스4 ... Cooling solidified wax (protective material1) 5 ... Case
6... 합성 수지(보호재2) 7... 노즐6 ... synthetic resin (protective material 2) 7 ... nozzle
본 발명에 의하면,According to the invention,
고체 전해 캐패시터 소체에 외부 보호재를 형성하기 전에,Before forming the outer protective material on the solid electrolytic capacitor body,
고체 전해 캐패시터 소자(1)를 융해시킨 액상의 왁스(2)에 침지한 다음 냉각시켜 고화시킴으로써 합성수지 외부 보호재가 소체에 침투할 수 없게 소자 전체를 감싸도록 왁스 보호재를 형성하는 단계;Immersing the solid electrolytic capacitor device 1 in the melted liquid wax 2 and then cooling and solidifying the wax protection material to cover the entire device such that the synthetic resin external protection material cannot penetrate the body;
로 이루어지는 왁스를 이용한 고체 전해 캐패시터의 외부 보호재 형성 방법이 제공된다.Provided is a method for forming an outer protective material of a solid electrolytic capacitor using a wax.
이하, 본 발명에 대하여 도면을 참조하여 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated with reference to drawings.
본 발명자들은 고체 전해질 캐패시터를 제조한 다음 외부 보호재로 사용하는 합성 수지의 소체내 침투 문제를 해결하는데 있어, 왁스가 고화 시간이 빠르다는데 착안하고, 본 발명을 완성하기에 이르렀다.In order to solve the problem of in-body penetration of a synthetic resin used as an external protective material after preparing a solid electrolyte capacitor, the present inventors have realized that the solidification time of the wax is fast, and the present invention has been completed.
도 2를 참조하면, 고체 전해질층을 형성한 캐패시터 소자(1)를 융해시킨 액상의 왁스(2)에 침지시킨다. 왁스는 상온에서 쉽게 고화되므로 히터를 사용하여 계속 가열하면서 침지시킨다. Referring to FIG. 2, the capacitor element 1 in which the solid electrolyte layer is formed is immersed in the molten liquid wax 2. The wax is easily solidified at room temperature, so that it is immersed with continuous heating using a heater.
또한 후-경화도중 발열로 인하여 왁스가 용융화됨으로써 제2 보호재로 사용하는 합성 수지가 침투할 수 있다는 점을 고려할 때, 상기 용융화를 방지하기 위해서는 합성 수지의 경화 온도보다도 연화점이 높아야 한다.In addition, in consideration of the fact that the wax melts due to heat generation during post-curing, the synthetic resin used as the second protective material may penetrate, and in order to prevent the melting, the softening point must be higher than the curing temperature of the synthetic resin.
따라서 예를 들면 왁스와 에폭시 수지를 이용할 경우, 에폭시 수지의 경화 온도는 상온∼150℃이며, 왁스의 연화점 온도는 50∼160℃이므로, 이들 범위내에서 상술한 용융 문제를 감안하여 적절한 합성 수지의 경화 온도 및 그 경화 온도보다 높은 왁스의 연화점 온도를 선택하여야 한다.Therefore, for example, in the case of using a wax and an epoxy resin, the curing temperature of the epoxy resin is from room temperature to 150 ° C, and the wax softening point temperature is from 50 to 160 ° C. The curing temperature and softening point temperature of the wax higher than the curing temperature should be selected.
상기 액상 왁스에 침지시킨 고체 전해 캐패시터를 꺼내어 냉각시키면 수초내에 고화된다. 이와 같이, 고체 전해 캐패시터 소자(1)를 융해시킨 액상의 왁스(2)에 침지한 다음 냉각시켜 고화시킴으로써 합성수지 외부 보호재가 소체에 침투할 수 없게 소자 전체를 감싸는 왁스 보호재가 형성된다.The solid electrolytic capacitor immersed in the liquid wax is taken out and cooled to solidify within a few seconds. In this manner, the solid electrolytic capacitor element 1 is immersed in the molten liquid wax 2 and then cooled and solidified to form a wax protective material covering the entire element such that the synthetic resin external protective material cannot penetrate the body.
이와 같이 제조된 고화된 왁스 보호재위에 합성 수지 보호재를 적용하려면, 상기 소자 전체에 왁스를 씌운 고체 전해 캐패시터를 금속 또는 비금속 물질의 케이스(5)에 삽입하고, 케이스의 벽간에 합성 수지(6)를 주입하거나 혹은 왁싱후 합성 수지(6)에 직접 침지시킨 다음 경화시키는 방식으로 외부 보호재를 형성함으로써, 합성 수지의 캐패시터내 침투를 막아 전도도가 높은 고체 전해질의 효과를 극대화시킨 고체 전해 캐패시터를 제조할 수 있다.In order to apply the synthetic resin protective material on the solidified wax protective material thus manufactured, a solid electrolytic capacitor, which is waxed all over the device, is inserted into a case 5 of metal or nonmetallic material, and the
또한 본 발명의 방법에서는 상기 합성 수지뿐 아니라 왁스와는 다른 재료를 이용하여 하나이상의 보호재를 형성할 수도 있다.In addition, in the method of the present invention, one or more protective materials may be formed using materials other than wax as well as the synthetic resin.
이하, 본 발명의 실시예에 대하여 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described.
실시예Example
Cs(직류 용량) 비교Cs (direct current capacity) comparison
비교예로서 에폭시 수지(경화 온도: 상온)에 8시간동안 경화시킨 Al 고체 전해 캐패시터(비교예)와, 본 발명에 의해 상기 에폭시 수지의 경화 온도보다 연화점이 높은 왁스(연화점: 80℃)를 먼저 형성한 다음 그위에 상기 에폭시 수지 보호재를 형성한(실시예) 각 5종류의 Al 고체 전해 캐패시터로 부터 LCR 기기를 사용하여 120Hz에서 Cs값을 측정하고 그 결과를 하기표 1에 나타내었다.As a comparative example, an Al solid electrolytic capacitor (comparative example) cured in an epoxy resin (curing temperature: room temperature) for 8 hours and a wax having a softening point higher than the curing temperature of the epoxy resin (softening point: 80 ° C.) were first used by the present invention. After forming, the Cs value was measured at 120 Hz using an LCR device from each of five kinds of Al solid electrolytic capacitors having the epoxy resin protective material formed thereon (example), and the results are shown in Table 1 below.
상기표 1에서 보듯이, 비교예에서는 용량값이 현저하게 불규칙하게 됨을 알 수 있는 반면, 본 발명의 방법에 의하면 왁스가 에폭시 수지의 소체내 침투를 확실하게 막아 용량값이 불규칙하게 되는 것을 방지할 수 있다.As shown in Table 1, in the comparative example it can be seen that the capacity value is significantly irregular, while according to the method of the present invention the wax prevents the infiltration of the epoxy resin in the body, thereby preventing the capacity value from being irregular Can be.
상기한 바에 따르면, 합성 수지 보호재를 형성하기 전에 왁스를 씌움으로써 합성 수지의 소체 내부 침투 현상을 확실하게 방지할 수 있다.According to the above, it is possible to reliably prevent the internal body penetration of the synthetic resin by applying wax before forming the synthetic resin protective material.
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