KR20050089480A - Method for manufacturing a capacitor using conducting polymer - Google Patents
Method for manufacturing a capacitor using conducting polymer Download PDFInfo
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- KR20050089480A KR20050089480A KR1020040014916A KR20040014916A KR20050089480A KR 20050089480 A KR20050089480 A KR 20050089480A KR 1020040014916 A KR1020040014916 A KR 1020040014916A KR 20040014916 A KR20040014916 A KR 20040014916A KR 20050089480 A KR20050089480 A KR 20050089480A
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- drying
- pyrrole
- impregnating
- tantalum
- alcohol
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- 239000003990 capacitor Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229920001940 conductive polymer Polymers 0.000 title claims abstract description 8
- 239000002322 conducting polymer Substances 0.000 title 1
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims abstract description 46
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 29
- 238000001035 drying Methods 0.000 claims abstract description 26
- 239000000178 monomer Substances 0.000 claims abstract description 20
- GKWLILHTTGWKLQ-UHFFFAOYSA-N 2,3-dihydrothieno[3,4-b][1,4]dioxine Chemical compound O1CCOC2=CSC=C21 GKWLILHTTGWKLQ-UHFFFAOYSA-N 0.000 claims abstract description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000007800 oxidant agent Substances 0.000 claims abstract description 17
- 230000001590 oxidative effect Effects 0.000 claims abstract description 16
- 229920000642 polymer Polymers 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- MREIFUWKYMNYTK-UHFFFAOYSA-N 1H-pyrrole Chemical compound C=1C=CNC=1.C=1C=CNC=1 MREIFUWKYMNYTK-UHFFFAOYSA-N 0.000 abstract 1
- 239000010408 film Substances 0.000 description 13
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 12
- 239000000243 solution Substances 0.000 description 11
- 238000006116 polymerization reaction Methods 0.000 description 8
- 238000010304 firing Methods 0.000 description 6
- 238000005245 sintering Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 2
- 229930007886 (R)-camphor Natural products 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- YMMGRPLNZPTZBS-UHFFFAOYSA-N 2,3-dihydrothieno[2,3-b][1,4]dioxine Chemical compound O1CCOC2=C1C=CS2 YMMGRPLNZPTZBS-UHFFFAOYSA-N 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- H01G9/004—Details
- H01G9/022—Electrolytes; Absorbents
- H01G9/025—Solid electrolytes
-
- 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
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
-
- 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
-
- 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
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
- H01G2009/05—Electrodes or formation of dielectric layers thereon characterised by their structure consisting of tantalum, niobium, or sintered material; Combinations of such electrodes with solid semiconductive electrolytes, e.g. manganese dioxide
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
Abstract
본 발명은 전도성 고분자를 이용한 탄탈전해 콘덴서의 제조방법으로 화성단계에서 생성된 탄탈소자의 산화피막을 산화제 용액에 함침하는 단계(S410)와, 산화제를 건조하는 단계(S420)와, 피롤(pyrrole)의 모노머 용액에 함침하는 단계(S430)와, 모노머를 건조하는 단계(S440)와, 알콜로 세척하는 단계(S450)와, 알콜을 건조하는 단계(S460)와, 상기 단계(S410)∼(S460)들을 소정회수 반복시행하는 단계(S470)로 이루어진 콘덴서 내부의 피롤 폴리머층 형성공정과, 화성단계에서 생성된 탄탈소자의 산화피막을 산화제 용액에 함침하는 단계(S410')와, 산화제를 건조하는 단계(S420')와, EDOT의 모노머 용액에 함침하는 단계(S430')와, 모노머를 건조하는 단계(S440')와, 알콜로 세척하는 단계(S450')와, 알콜을 건조하는 단계(S460')와, 상기 단계(S410')∼(S460')들을 소정회수 반복시행하는 단계(S470')로 이루어진 콘덴서 외부의 EDOT 폴리머층 형성공정을 포함한다.The present invention is a method of manufacturing a tantalum electrolytic capacitor using a conductive polymer impregnating the oxide film of the tantalum element produced in the chemical conversion step (S410), drying the oxidant (S420) and pyrrole (pyrrole) Impregnating the monomer solution (S430), drying the monomer (S440), washing with alcohol (S450), drying the alcohol (S460), and (S410) to (S460). ) And repeating the predetermined number of times (S470), forming a pyrrole polymer layer inside the condenser, impregnating the oxide film of the tantalum element generated in the chemical conversion step into the oxidant solution (S410 '), and drying the oxidant. Step S420 ', impregnating the monomer solution of the EDOT (S430'), drying the monomer (S440 '), washing with alcohol (S450'), and drying the alcohol (S460). ') And repeating the steps S410' to S460 'a predetermined number of times. In step S470 ′, an EDOT polymer layer forming process outside the capacitor is included.
본 발명에 의하면, 콘덴서의 폴리머층이 재료비가 비싼 EDOT에서 피롤을 일부 사용할 수 있으므로, 재료비를 절감하고, 초기에 피롤을 사용하고 후기에 EDOT를 사용하므로 피롤 폴리머층의 기계적 강도를 보강하는 효과를 가진다.According to the present invention, since the polymer layer of the condenser can use some of the pyrrole in the EDOT which is expensive, the material cost can be reduced, and since the pyrrole is used initially and the EDOT is used later, the mechanical strength of the pyrrole polymer layer can be improved. Have
Description
본 발명은 탄탈전해 콘덴서 제조방법에 관한 것으로, 보다 상세하게는 EDOP와 피롤을 함께 사용하는 산화중합만으로 LC 특성 및 등가직렬저항(ESR)값을 개선할 수 있는 탄탈전해 콘덴서의 제조방법에 관한 것이다.The present invention relates to a method of manufacturing a tantalum electrolytic capacitor, and more particularly, to a method of manufacturing a tantalum electrolytic capacitor capable of improving LC characteristics and equivalent series resistance (ESR) value by only oxidative polymerization using EDOP and pyrrole together. .
잘 알려진 바와 같이, 반도체 작용을 하는 탄탈금속의 산화피막을 콘덴서의 유전체로 이용하는 전해 콘덴서(electrolytic capacitor)를 탄탈륨(tantalum) 전해 콘덴서라 한다. 이러한 탄탈전해 콘덴서는 양극산화에 의하여 형성된 탄탈산화물(Ta2O5)을 유전체로 하고 있다. 탄탈의 박과 소결체를 전극으로 양극산화에 의하여 탄탈금속면에 형성된 산화피막은 화성전압 1V당 10∼16Å으로 형성된 얇은 피막으로서 피막의 두께는 화성전압의 상승에 비례하여 증가하며, 콘덴서의 정전용량과는 반비례의 관계를 이루고 있다. 또한, 화성전압은 탄탈전해 콘덴서의 종류에 따라 다르지만, 탄탈고체 전해 콘덴서에서는 정격전압의 3∼4배, 탄탈 박형 전해 커패시터에서는 1.3∼1.4배를 기준으로 하고 있고, 유전체인 탄탈산화피막의 유전율은 εr은 23으로, 유전율이 7에 해당하는 알루미늄 산화피막에 비해 약 3배에 해당한다.As is well known, an electrolytic capacitor that uses an oxide film of tantalum metal that acts as a semiconductor as a dielectric of a capacitor is called a tantalum electrolytic capacitor. Such a tantalum electrolytic capacitor has a tantalum oxide (Ta 2 O 5 ) formed by anodization as a dielectric. Anodized film formed on the tantalum metal surface by anodizing tantalum foil and sintered body as an electrode is a thin film formed at 10 ~ 16Å per 1V of ignition voltage, and the thickness of the film increases in proportion to the increase of the ignition voltage. Is inversely related to. In addition, the conversion voltage is different depending on the type of tantalum electrolytic capacitor, but it is based on 3 to 4 times the rated voltage in the tantalum solid electrolytic capacitor and 1.3 to 1.4 times in the tantalum thin electrolytic capacitor, and the dielectric constant of the tantalum oxide film as the dielectric is ε r is 23, which is about three times higher than that of an aluminum oxide film having a dielectric constant of 7.
도 1에는 이상과 같은 탄탈전해 콘덴서의 일반적인 제조방법을 도시하고 있다. 이를 참조하여 설명하면, 도 1에 있어서, 먼저, 성형단계로서 탄탈분말에 접착제(blinder) 역할을 행하는 용제인 D-Camphor를 혼합한 후, 용제를 건조 제거시킨 다음, 평량하여 원통형 또는 각형 펠릿(Pellet)에 양극 리드선인 탄탈선을 삽입시켜 일정한 밀도로 성형을 행한다.(S10) 이어서, 소결단계로서 성형된 소자를 진공소결로에 장진한 후, 10-5mmHg 정도의 진공중에서 1600∼2000℃정도로 가열한 후 상기 D-Camphor를 제거하여 탄탈금속을 양산한다.(S20) 다음의 화성단계에서는 상기 소결공정에 의하여 양산된 탄탈금속을 전해액속에 넣고, 직류전압을 인가하여, 탄탈금속의 표면에 산화피막(Ta2O5)을 생성하게 되며, 이것이 2개의 전극과 그 사이에 삽설되는 콘덴서의 유전체가 된다.(S30) 이어지는 소성단계에서는 화성단계에서 생성된 산화피막의 표면에 음극전해질로서의 이산화망간층을 형성한다. 즉, 소자의 기공내부에 있는 산화피막의 표면에 이산화망간층을 부착시키기 위하여 질산망간의 수용액중에 소자를 침적하여 함침시킨 후, 가열분해하여 이산화망간층을 얻게된다.(S40) 그리고, 조립단계(S50)에서는 소성단계(S40)에서 이산화망간층을 형성한 후의 소자에 대해서 외장까지의 필요한 카본 도포, 은폐이스트 도포 및 리드용접을 행함으로서 외장공정까지가 완료된다. 이어지는 에이징 단계(S60)에서는 외장을 완료한 콘덴서는 목표품질, 또는 요구하는 품종에 만족할 만한 조건으로 에이징(Aiging)을 하여 초기불량을 제거한 다음, 신뢰성에 대한 롯(lot) 판정을 하여 롯에 해당하는 제품은 페기처분한다. 마지막으로 마킹단계(S70)에서는 콘덴서에 절연슬리브를 피복시키거나 필요한 표시(정격전압, 정전용량, 극성표시)를 행함으로서 탄탈전해 콘덴서의 제조공정을 완료하게 된다.1 shows a general manufacturing method of the tantalum electrolytic capacitor as described above. Referring to this, in Fig. 1, first, D-Camphor, which is a solvent that acts as a binder in tantalum powder as a molding step, is mixed, and then the solvent is dried and removed, and then weighed into cylindrical or rectangular pellets ( Tantalum wire, which is an anode lead wire, is inserted into pellets, and molding is performed at a constant density. (S10) Next, the device formed as a sintering step is charged to a vacuum sintering furnace, and then 1600 to 2000 ° C in a vacuum of about 10 -5 mmHg. After heating to a degree, the D-Camphor is removed to mass-produce tantalum metal. (S20) In the next chemical conversion step, the tantalum metal mass produced by the sintering process is placed in an electrolyte solution, and a DC voltage is applied to the surface of the tantalum metal. and to generate an oxide film (Ta 2 O 5), this is the two electrodes and the dielectric of the capacitor sapseol therebetween. (S30) in the subsequent firing step before the cathode on the surface of the oxide film generated in the chemical conversion step To form a manganese dioxide layer as the quality. That is, in order to attach the manganese dioxide layer on the surface of the oxide film in the pores of the device, the device is dipped and impregnated in an aqueous solution of manganese nitrate, and thermally decomposed to obtain a manganese dioxide layer (S40). In step S40, the carbonization, concealing yeast coating, and lead welding required for the device after forming the manganese dioxide layer in the firing step (S40) are completed, thereby completing the exterior process. In the subsequent aging step (S60), the completed capacitor is aged by removing the initial defects by aging (Aiging) to a condition that satisfies the target quality or required varieties, and then determines the reliability of the lot. Products to be discarded. Finally, in the marking step (S70), the manufacturing process of the tantalum electrolytic capacitor is completed by covering the insulating sleeve on the capacitor or by performing the necessary markings (rated voltage, capacitance, polarity indication).
이상과 같은 종래의 탄탈전해 콘덴서의 제조방법에 있어서, 화성단계(S30)에서 생성된 탄탈소자의 산화피막의 표면에 음극용 전해질로서의 이산화망간층은 전도도가 작고 표면의 접촉저항도 크므로, 최근에는 이산화망간 전해질보다 전도도가 크고, 전기화학적으로 안정된 피롤(pyrrole)등의 모노머(monomer)를 전해중합(eletrolyic polymerization)하여 얻은 고분자를 고체전해질로 사용하거나, EDOT(ethylenedioxythiophen:에틸렌디옥시디오펜)의 모노머를 사용하면, 등가직류저항(ESR)값이나 고주파 특성이 개선되는 것이 알려져 있다.In the conventional method of manufacturing a tantalum electrolytic capacitor as described above, since the manganese dioxide layer as the cathode electrolyte on the surface of the oxide film of the tantalum element produced in the chemical conversion step (S30) has a low conductivity and a large contact resistance, in recent years The polymer obtained by electrolytic polymerization of electrochemically stable monomers such as pyrrole having higher conductivity than manganese dioxide electrolyte is used as a solid electrolyte or a monomer of EDOT (ethylenedioxythiophen: ethylenedioxydiophene) When used, it is known that equivalent DC resistance (ESR) values and high frequency characteristics are improved.
하지만, EDOT은 재료비가 너무 고가인 단점이 있고, 이에 비해 1/10정도로 재료비가 저렴한 피롤(pyrrole)등의 모노머(monomer)은 산화중합공정과 함께 전해중합의 공정이 필요하므로 생산기술이 난해하고, 그렇다고, 산화중합만으로 피롤의 폴리머층을 형성하면 그 기계적강도가 취약하여 만족할 만한 LC특성을 구현하지 못하는 문제가 있었다.However, EDOT has a disadvantage that the material cost is too high, and compared to that of monomers such as pyrrole, which is inexpensive at about 1/10, the production technology is difficult because the electropolymerization process is required along with the oxidation polymerization process. However, if the polymer layer of pyrrole is formed only by oxidation polymerization, there is a problem in that the mechanical strength is weak and thus it is impossible to realize satisfactory LC characteristics.
본 발명은 상기 문제점을 해결하기 위한 것으로, 본 발명의 목적은 EDOT와 피롤을 함께 사용하는 산화중합만으로 LC 특성 및 등가직렬저항(ESR)값을 개선할 수 있는 탄탈전해 콘덴서의 제조방법을 제공하는 것이다.The present invention is to solve the above problems, an object of the present invention is to provide a method for manufacturing a tantalum electrolytic capacitor which can improve the LC characteristics and equivalent series resistance (ESR) value only by oxidation polymerization using EDOT and pyrrole together. will be.
이와 같은 목적을 실현하기 위한 본 발명의 탄탈전해 콘덴서의 제조방법에 있어서, 화성단계에서 생성된 탄탈소자의 산화피막을 산화제 용액에 함침하는 단계와, 산화제를 건조하는 단계와, 피롤 모노머 용액에 함침하는 단계와, 모노머를 건조하는 단계와, 상기 단계들을 소정회수 반복시행하는 단계로 구성된 콘덴서 내부의 피롤 폴리머층 형성공정과, 화성단계에서 생성된 탄탈소자의 산화피막을 산화제 용액에 함침하는 단계와, 산화제를 건조하는 단계와, EDOT 모노머 용액에 함침하는 단계와, 모노머를 건조하는 단계와, 상기 단계들을 소정회수 반복시행하는 단계로 구성된 콘덴서 외부의 EDOT 폴리머층 형성공정을 포함한다.In the manufacturing method of the tantalum electrolytic capacitor of the present invention for achieving the above object, the step of impregnating the oxide film of the tantalum element produced in the chemical conversion step in the oxidant solution, the step of drying the oxidant, and impregnated in the pyrrole monomer solution Forming a pyrrole polymer layer in the condenser; and impregnating the oxide film of the tantalum element produced in the chemical conversion step into the oxidant solution; And drying the oxidant, impregnating the EDOT monomer solution, drying the monomer, and repeating the steps a predetermined number of times.
본 발명에 의하면, 콘덴서의 폴리머층이 재료비가 비싼 EDOT에서 피롤을 일부 사용할 수 있으므로, 재료비를 절감하고, 초기에 피롤을 사용하고 후기에 EDOT를 사용하므로 피롤 폴리머층의 기계적 강도를 보강하는 효과를 가진다.According to the present invention, since the polymer layer of the condenser can use some of the pyrrole in the EDOT which is expensive, the material cost can be reduced, and since the pyrrole is used initially and the EDOT is used later, the mechanical strength of the pyrrole polymer layer can be improved. Have
이하, 본 발명의 가장 바람직한 실시예를 첨부한 도면을 참조하여 본 발명의 기술분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 더욱 상세히 설명하기로 한다.DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.
본 발명은 일반적인 전도성 고분자를 이용한 탄탈전해 콘덴서의 제조방법의 과정중에서 소정단계이외에는 모두 동일하므로, 그 상세한 설명은 생략하였다.Since the present invention is the same except for a predetermined step in the process of manufacturing a tantalum electrolytic capacitor using a general conductive polymer, detailed description thereof is omitted.
도 2에는 본 발명의 바람직한 일실시예에 따른 전도성 고분자를 이용한 탄탈전해 콘덴서의 제조방법의 소성단계를 도시하였다.Figure 2 shows the firing step of the manufacturing method of the tantalum electrolytic capacitor using a conductive polymer according to an embodiment of the present invention.
본 발명에 따른 소성단계는, 도시된 바와 같이, 화성단계에서 생성된 탄탈소자의 산화피막을 상온에서 산화제 용액에 십분간 함침하는 단계(S410)와, 산화제를 통상 건조로(도시하지 않음)에서 1시간동안 상온으로 건조하는 단계(S420)와, 피롤(pyrrole)의 모노머 용액에 십분동안 함침하는 단계(S430)와, 모노머를 상온에서 수시간동안 건조하는 단계(S440)와, 알콜에서 수분동안 세척하는 단계(S450)와, 알콜을 수분동안 건조하는 단계(S460)와, 상기 단계(S410)∼(S460)들을 5∼10회 반복시행하는 단계(S470)로 이루어진 콘덴서 내부의 피롤 폴리머층 형성공정과, 화성단계에서 생성된 탄탈소자의 산화피막을 상온에서 산화제 용액에 십분간 함침하는 단계(S410')와, 산화제를 통상 건조로(도시하지 않음)에서 1시간동안 상온으로 건조하는 단계(S420')와, EDOT의 모노머 용액에 십분동안 함침하는 단계(S430')와, 모노머를 상온에서 수시간동안 건조하는 단계(S440')와, 알콜로 수분동안 세척하는 단계(S450')와, 알콜을 수분동안 건조하는 단계(S460')와, 상기 단계(S410')∼(S460')들을 5∼10회 반복시행하는 단계(S470')로 이루어진 콘덴서 외부의 EDOT 폴리머층 형성공정을 포함한다.In the firing step according to the present invention, as shown, the step of impregnating the oxide film of the tantalum element produced in the chemical conversion step in the oxidant solution for 10 minutes at room temperature (S410), and the oxidant in a normal drying furnace (not shown) Drying at room temperature for 1 hour (S420), impregnating the monomer solution of pyrrole for 10 minutes (S430), drying the monomer at room temperature for several hours (S440), and for several minutes in alcohol. Forming a pyrrole polymer layer in the condenser including a washing step (S450), drying the alcohol for a few minutes (S460), and repeating the steps (S410) to (S460) 5 to 10 times (S470). Process and impregnating the oxide film of the tantalum element produced in the chemical conversion step at room temperature for 10 minutes in an oxidizing agent solution (S410 '), and drying the oxidizing agent at room temperature for 1 hour in a normal drying furnace (not shown) ( S420 ') and monomer solution of EDOT Impregnating for 10 minutes (S430 '), drying the monomer for several hours at room temperature (S440'), washing for several minutes with alcohol (S450 '), and drying the alcohol for several minutes (S460'). And the step of forming the EDOT polymer layer outside the capacitor including the steps S470 'to repeat the steps S410' to S460 '5 to 10 times.
산화제 용액으로서, 용매의 5∼40%를 아세톤, 아세토니트릴, 메탄올, 에탄올등 물보다 휘발성이 크고 표면장력이 작은 용매를 혼합하여 제조하는 것이 바람직하다.As the oxidant solution, it is preferable to prepare 5 to 40% of the solvent by mixing a solvent such as acetone, acetonitrile, methanol, ethanol, etc. which is more volatile and has a lower surface tension.
이상과 같이, 본 발명의 소성단계에서의 중합방법은 콘덴서의 폴리머층이 재료비가 비싼 EDOT에서 피롤을 일부 사용할 수 있는 것으로, 종래에 비해 재료비를 헐씬 절감할 수 있고, 더구나, 초기에 피롤을 사용하고 후기에 EDOT를 사용하므로서, 피롤 폴리머층의 기계적 강도를 상당히 보강한다.As described above, the polymerization method in the firing step of the present invention is that the polymer layer of the condenser can use some of the pyrrole in the EDOT material cost is expensive, it is possible to significantly reduce the material cost compared to the conventional, furthermore, initially used pyrrole By using EDOT later, it significantly reinforces the mechanical strength of the pyrrole polymer layer.
이상에서 설명한 바와 같은 본 발명에 따른 전도성 고분자를 이용하는 탄탈전해 콘덴서의 제조방법은 하나의 실시예에 불과한 것으로서, 본 발명은 상기한 실시예에 한정되지 않고, 이하의 특허청구범위에서 청구하는 바와 같이 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변경 실시가 가능한 범위까지 본 발명의 기술적 정신이 있다고 할 것이다.Method for manufacturing a tantalum electrolytic capacitor using the conductive polymer according to the present invention as described above is just one embodiment, the present invention is not limited to the above embodiment, as claimed in the claims below Without departing from the gist of the present invention, anyone of ordinary skill in the art will have the technical spirit of the present invention to the extent that various modifications can be made.
상술한 바와 같이, 본 발명에 따른 전도성 고분자를 이용하는 탄탈전해 콘덴서의 제조방법은 EDOT와 피롤을 함께 사용하는 산화중합만으로 EDOT만의 사용시에 비해 헐씬 저렴하면서도, 피롤만의 사용시에 비해 더욱 견고해지며, LC 특성 및 등가직렬저항(ESR)값을 개선할 수 있는 효과를 가진다. As described above, the manufacturing method of the tantalum electrolytic capacitor using the conductive polymer according to the present invention is much cheaper than using only EDOT, but more robust than using only pyrrole, by oxidative polymerization using EDOT and pyrrole together. It has the effect of improving the LC characteristic and equivalent series resistance (ESR) value.
도 1은 일반적인 탄탈전해 콘덴서의 제조방법을 개략적으로 나타낸 블록도이고,1 is a block diagram schematically showing a method of manufacturing a general tantalum electrolytic capacitor,
도 2는 도 1의 제조방법중 본 발명의 바람직한 일실시예에 따른 소성단계의 중합공정을 나타낸 블록도이다.2 is a block diagram showing a polymerization process of a sintering step according to a preferred embodiment of the present invention in the manufacturing method of FIG.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
S10 : 성형단계 S20 : 소결단계S10: forming step S20: sintering step
S30 : 화성단계 S40 : 소성단계S30: Mars step S40: Firing step
S50 : 조립단계 S60 : 에이징단계S50: Assembly step S60: Aging step
S70 : 마킹단계 S410 : 산화제 용액 함침단계S70: marking step S410: oxidant solution impregnation step
S420 : 산화제 건조단계 S430 : 모노머 용액 함침단계S420: oxidizing agent drying step S430: monomer solution impregnation step
S440 : 모노머 건조단계 S450 : 알콜 세척 단계S440: monomer drying step S450: alcohol washing step
S460 : 알콜 건조 단계 S470 : S410∼S460 반복S460: alcohol drying step S470: repeating S410 to S460
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