JP2000228331A - Manufacture of electrolytic capacitor - Google Patents
Manufacture of electrolytic capacitorInfo
- Publication number
- JP2000228331A JP2000228331A JP11027478A JP2747899A JP2000228331A JP 2000228331 A JP2000228331 A JP 2000228331A JP 11027478 A JP11027478 A JP 11027478A JP 2747899 A JP2747899 A JP 2747899A JP 2000228331 A JP2000228331 A JP 2000228331A
- Authority
- JP
- Japan
- Prior art keywords
- conductive polymer
- capacitor element
- polymer layer
- capacitor
- monomer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 82
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 229920001940 conductive polymer Polymers 0.000 claims abstract description 44
- 239000011888 foil Substances 0.000 claims abstract description 26
- 239000000178 monomer Substances 0.000 claims abstract description 25
- 239000007800 oxidant agent Substances 0.000 claims abstract description 15
- 230000001590 oxidative effect Effects 0.000 claims abstract description 13
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 12
- 239000000243 solution Substances 0.000 claims abstract description 10
- 239000004094 surface-active agent Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 13
- 239000008151 electrolyte solution Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 abstract description 14
- 239000007864 aqueous solution Substances 0.000 abstract description 5
- -1 polyoxyethylene Polymers 0.000 abstract description 5
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 abstract description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 abstract description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 abstract description 2
- 125000003118 aryl group Chemical group 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000411 inducer Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 230000000379 polymerizing effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 10
- 239000007787 solid Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000010406 cathode material Substances 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000012685 gas phase polymerization Methods 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 229920000767 polyaniline Polymers 0.000 description 2
- 229920000414 polyfuran Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920000128 polypyrrole Polymers 0.000 description 2
- 229920000123 polythiophene Polymers 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007739 conversion coating Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 1
- 239000000244 polyoxyethylene sorbitan monooleate Substances 0.000 description 1
- 229920000053 polysorbate 80 Polymers 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- PCCVSPMFGIFTHU-UHFFFAOYSA-N tetracyanoquinodimethane Chemical compound N#CC(C#N)=C1C=CC(=C(C#N)C#N)C=C1 PCCVSPMFGIFTHU-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、陽極化成箔と対向
陰極箔とをセパレータを介して巻回してなるコンデンサ
素子内に、導電性ポリマーを含む陰極材を含浸させた電
解コンデンサに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic capacitor in which a cathode element containing a conductive polymer is impregnated in a capacitor element formed by winding an anodized foil and a counter cathode foil via a separator. .
【０００２】[0002]
【従来の技術】電子機器のデジタル化に伴い、それに使
用されるコンデンサにも小型、大容量で高周波領域にお
ける等価直列抵抗（以下、ＥＳＲと略す）の小さいもの
が求められるようになってきている。2. Description of the Related Art Along with the digitization of electronic equipment, capacitors used therein are required to be small in size, large in capacity, and low in equivalent series resistance (hereinafter abbreviated as ESR) in a high frequency region. .
【０００３】従来、高周波領域用のコンデンサとしては
プラスチックフイルムコンデンサ、積層セラミックコン
デンサ等が多用されているが、これらは比較的小容量で
ある。Conventionally, plastic film capacitors, multilayer ceramic capacitors, and the like have been frequently used as capacitors for a high frequency region, but these have relatively small capacities.
【０００４】小型、大容量で低ＥＳＲのコンデンサとし
ては、二酸化マンガン、ＴＣＮＱ錯塩等の電子電導性固
体を陰極材として用いた固体電解コンデンサがある。こ
こでＴＣＮＱとは７，７，８，８−テトラシアノキノジ
メタンを意味する。As a small, large-capacity, low-ESR capacitor, there is a solid electrolytic capacitor using an electron conductive solid such as manganese dioxide, TCNQ complex salt or the like as a cathode material. Here, TCNQ means 7,7,8,8-tetracyanoquinodimethane.
【０００５】又、ポリピロール、ポリチオフェン、ポリ
フラン、ポリアニリン等の導電性ポリマーを陰極材とし
て用いた固体電解コンデンサも有望である。[0005] A solid electrolytic capacitor using a conductive polymer such as polypyrrole, polythiophene, polyfuran, or polyaniline as a cathode material is also promising.
【０００６】[0006]
【発明が解決しようとする課題】前記導電性ポリマーを
陰極材として用いた固体電解コンデンサの従来製法にお
いては、アルミニウム、タンタル等の弁作用金属からな
る陽極焼結体の表面に、化成皮膜、導電性ポリマー層、
グラファイト層、銀ペイント層が順次形成され、そこへ
陰極リード線が導電性接着剤等により接続されるが、こ
の製法は、化成皮膜を形成した陽極箔と対向陰極箔とを
セパレータを介して巻回したコンデンサ素子に電解液を
含浸するという通常の電解コンデンサの製法に比べて、
かなり煩雑である。又、陽極材として焼結体を用いた構
成では、大容量化に限界があり、上述の如き陰極引き出
し法では、対向陰極箔を用いる場合に比べてＥＳＲが大
きくなる。In the conventional method of manufacturing a solid electrolytic capacitor using a conductive polymer as a cathode material, a conversion coating, a conductive film and a conductive film are formed on the surface of an anode sintered body made of a valve metal such as aluminum or tantalum. Polymer layer,
A graphite layer and a silver paint layer are sequentially formed, and a cathode lead wire is connected to the layer by a conductive adhesive or the like.In this manufacturing method, an anode foil having a chemical conversion film and an opposite cathode foil are wound via a separator. Compared to the usual electrolytic capacitor manufacturing method of impregnating the turned capacitor element with electrolyte,
It is quite complicated. Further, in the configuration using a sintered body as the anode material, there is a limit to increasing the capacity, and the ESR is higher in the above-described cathode drawing method than in the case of using the opposite cathode foil.
【０００７】一方、前記導電性ポリマー層は電解重合法
や気相重合法等により形成されるが、巻回型のコンデン
サ素子内に電解重合法や気相重合法により導電性ポリマ
ー層を形成するのは容易でない。陽極箔上に化成皮膜及
び導電性ポリマー層を形成した後、対向陰極箔とともに
巻き取るという製法も考えられるが、化成皮膜や導電性
ポリマー層を損傷することなく巻き取るのは困難であ
る。On the other hand, the conductive polymer layer is formed by an electrolytic polymerization method or a gas phase polymerization method. The conductive polymer layer is formed in a wound capacitor element by an electrolytic polymerization method or a gas phase polymerization method. Not easy. A method of forming the chemical conversion film and the conductive polymer layer on the anode foil and then winding the same together with the opposite cathode foil is also conceivable, but it is difficult to wind the chemical conversion film and the conductive polymer layer without damage.
【０００８】そこで本願出願人は、特願平号において、
酸化重合により導電性ポリマーとなるモノマーを巻回型
のコンデンサ素子に含浸させた後、該コンデンサ素子を
酸化剤を含む溶液に浸漬することにより、巻回型のコン
デンサ素子内に導電性ポリマー層を形成するという固体
電解コンデンサの製法を提案した。Accordingly, the applicant of the present application has described in Japanese Patent Application No.
After impregnating the winding-type capacitor element with a monomer which becomes a conductive polymer by oxidative polymerization, the conductive element is immersed in a solution containing an oxidizing agent to form a conductive polymer layer in the winding-type capacitor element. A method of forming a solid electrolytic capacitor was proposed.
【０００９】しかし、特願平９−１３２５５２号に記載
された技術だけでは、酸化重合により導電性ポリマーと
なるモノマーを含浸させたコンデンサ素子の内部に酸化
剤を含む溶液が十分に浸透しない場合があり、該コンデ
ンサ素子内における前記モノマーの重合反応が十分に進
行せず、導電性ポリマー層が不均一に形成されることが
あった。コンデンサ素子内における導電性ポリマー層の
形成が不均一であると、ＥＳＲが大きくなり、静電容量
が小さくなる。However, with the technique described in Japanese Patent Application No. Hei 9-132552 alone, a solution containing an oxidizing agent may not sufficiently penetrate into a capacitor element impregnated with a monomer which becomes a conductive polymer by oxidative polymerization. In some cases, the polymerization reaction of the monomer in the capacitor element did not sufficiently proceed, and the conductive polymer layer was sometimes formed non-uniformly. If the conductive polymer layer is not formed uniformly in the capacitor element, the ESR increases and the capacitance decreases.
【００１０】本発明は、上述の如き課題を解決するもの
である。The present invention solves the above-mentioned problems.
【００１１】[0011]
【課題を解決するための手段】本発明の第１の局面に従
った電解コンデンサの製造方法は、陽極化成箔と対向陰
極箔とをセパレータを介して巻回してなるコンデンサ素
子内に、導電性ポリマー層を形成した電解コンデンサの
製造方法において、酸化重合により導電性ポリマーとな
るモノマーを前記コンデンサ素子に含浸させた後、該コ
ンデンサ素子を酸化剤及び界面活性剤を含む溶液に浸漬
することにより、該コンデンサ素子内に導電性ポリマー
層を形成することを特徴とするものである。According to a first aspect of the present invention, there is provided a method of manufacturing an electrolytic capacitor, comprising: a capacitor element formed by winding an anodized foil and an opposite cathode foil via a separator; In the method for manufacturing an electrolytic capacitor having a polymer layer formed thereon, after impregnating the capacitor element with a monomer that becomes a conductive polymer by oxidative polymerization, by immersing the capacitor element in a solution containing an oxidizing agent and a surfactant, A conductive polymer layer is formed in the capacitor element.
【００１２】又、本発明の第２の局面に従った電解コン
デンサの製造方法は、陽極化成箔と対向陰極箔とをセパ
レータを介して巻回してなるコンデンサ素子内に、導電
性ポリマー層を形成すると共に電解液を含浸させた電解
コンデンサの製造方法において、酸化重合により導電性
ポリマーとなるモノマーを前記コンデンサ素子に含浸さ
せた後、該コンデンサ素子を酸化剤及び界面活性剤を含
む溶液に浸漬することにより、該コンデンサ素子内に導
電性ポリマー層を形成し、前記導電性ポリマー層を形成
したコンデンサ素子内に、電解液を含浸させることを特
徴とするものである。Further, according to a method of manufacturing an electrolytic capacitor according to a second aspect of the present invention, a conductive polymer layer is formed in a capacitor element formed by winding an anodized foil and a counter cathode foil via a separator. In a method for manufacturing an electrolytic capacitor impregnated with an electrolytic solution, after the capacitor element is impregnated with a monomer that becomes a conductive polymer by oxidative polymerization, the capacitor element is immersed in a solution containing an oxidizing agent and a surfactant. Thereby, a conductive polymer layer is formed in the capacitor element, and the electrolytic solution is impregnated in the capacitor element on which the conductive polymer layer is formed.
【００１３】上記本発明の第１及び第２の局面に従った
製法によれば、酸化重合により導電性ポリマーとなるモ
ノマーを含浸させたコンデンサ素子を、界面活性剤を添
加した高濃度の酸化剤水溶液に浸漬することにより、前
記モノマーを急速かつ均一に重合させることができ、該
モノマーのコンデンサ素子外への流出も抑制され、コン
デンサ素子内に均一に導電性ポリマー層が形成される。According to the manufacturing method according to the first and second aspects of the present invention, a capacitor element impregnated with a monomer which becomes a conductive polymer by oxidative polymerization is converted into a high-concentration oxidizing agent containing a surfactant. By dipping in the aqueous solution, the monomer can be polymerized quickly and uniformly, the outflow of the monomer to the outside of the capacitor element is suppressed, and the conductive polymer layer is uniformly formed in the capacitor element.
【００１４】又、上記本発明の第２の局面に従った製法
によれば、導電性ポリマー層を形成したコンデンサ素子
に電解液を含浸させることにより、陽極化成皮膜の損傷
部の修復力が向上する。Further, according to the manufacturing method according to the second aspect of the present invention, by impregnating the capacitor element having the conductive polymer layer with the electrolytic solution, the repairing ability of the damaged portion of the anodized chemical film is improved. I do.
【００１５】[0015]
【発明の実施の形態】本発明の実施形態に従った固体電
解コンデンサの製造方法においては、図１に示すような
巻回型のコンデンサ素子７内に、ポリピロール、ポリチ
オフェン、ポリフラン、ポリアニリン等からなる導電性
ポリマー層を形成する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a method for manufacturing a solid electrolytic capacitor according to an embodiment of the present invention, a winding type capacitor element 7 as shown in FIG. 1 is made of polypyrrole, polythiophene, polyfuran, polyaniline or the like. Form a conductive polymer layer.
【００１６】前記コンデンサ素子７は、アルミニウム、
タンタル、ニオブ、チタン等の弁作用金属からなる箔に
粗面化のためのエッチング処理及び誘電体皮膜形成のた
めの化成処理を施した陽極化成箔１と、対向陰極箔２と
をセパレータ３を介して巻き取ることにより形成され
る。前記陽極化成箔１及び対向陰極箔２には、それぞれ
リードタブ６１、６２を介してリード線５１、５２が取
り付けられている。４は巻き止めテープである。The capacitor element 7 is made of aluminum,
An anode forming foil 1 in which a foil made of a valve metal such as tantalum, niobium, titanium or the like is subjected to an etching treatment for surface roughening and a chemical conversion treatment for forming a dielectric film, and a counter cathode foil 2 into a separator 3 It is formed by winding through. Lead wires 51 and 52 are attached to the anodized foil 1 and the opposing cathode foil 2 via lead tabs 61 and 62, respectively. Reference numeral 4 denotes a winding tape.
【００１７】このコンデンサ素子には、陽極化成箔の損
傷部を修復すると共に陽極化成箔の裁断面や陽極リード
引き出し部に化成皮膜を形成することを目的として、周
知の再化成処理が施される。This capacitor element is subjected to a well-known re-chemical conversion treatment for the purpose of repairing the damaged portion of the anodized chemical foil and forming a chemical conversion film on the cut surface of the anodized aluminum foil and the lead portion of the anode lead. .
【００１８】更に、コンデンサ素子内に導電性ポリマー
層を形成する前に、加熱処理等を施すことによりコンデ
ンサ素子内のセパレータを炭化（すなわち、低密度化）
しておけば、該コンデンサ素子内に導電性ポリマー層が
形成されやすくなる。Further, before forming the conductive polymer layer in the capacitor element, the separator in the capacitor element is carbonized (ie, reduced in density) by performing a heat treatment or the like.
If so, a conductive polymer layer is easily formed in the capacitor element.
【００１９】前記コンデンサ素子内に導電性ポリマー層
を形成するには、まず、該コンデンサ素子に適量のピロ
ールモノマーを滴下する。In order to form a conductive polymer layer in the capacitor element, first, an appropriate amount of a pyrrole monomer is dropped on the capacitor element.
【００２０】そして、該コンデンサ素子を、過硫酸アン
モニウム、過硫酸ナトリウム等の酸化剤とポリオキシエ
チレン芳香族系誘導体、ジアルキルスルホコハク酸ナト
リウム塩、アルキルアミノプロピオン酸塩、ポリオキシ
エチレンソルビタンモノオレート等の界面活性剤とを含
む水溶液に約５分間浸漬し、前記ピロールモノマーを急
速に化学重合させて導電性ポリマー層を形成する。Then, the capacitor element is treated with an oxidizing agent such as ammonium persulfate or sodium persulfate and an interface between a polyoxyethylene aromatic derivative, sodium dialkylsulfosuccinate, alkylaminopropionate, polyoxyethylene sorbitan monooleate and the like. The pyrrole monomer is immersed in an aqueous solution containing an activator for about 5 minutes to rapidly chemically polymerize the pyrrole monomer to form a conductive polymer layer.
【００２１】次いでこの素子を水洗し、１００℃の乾燥
炉で約３０分間乾燥する。Next, the device is washed with water and dried in a drying oven at 100 ° C. for about 30 minutes.
【００２２】その後、この素子７を図２に示すようにア
ルミニウム製の外装ケース８に収納してその開口部をエ
ポキシ樹脂９にて封止し、定格電圧を印加しながら１２
５℃で１時間のエージングを行なうことにより、所望の
電解コンデンサが完成する。Thereafter, the element 7 is housed in an aluminum outer case 8 as shown in FIG. 2 and the opening thereof is sealed with an epoxy resin 9 while the rated voltage is being applied.
By performing aging at 5 ° C. for 1 hour, a desired electrolytic capacitor is completed.
【００２３】或いは、前記コンデンサ素子内に導電性ポ
リマー層を形成した後、該コンデンサ素子に周知の非固
体電解コンデンサ用電解液（例えば、γブチロラクト
ン、エチレングリコール、キシレン等を主溶媒とし、フ
タル酸、アジピン酸等のアミジン塩、アミン塩、アンモ
ニウム塩等を主溶質とする電解液）を含浸させ、この素
子７を図３に示すようにアルミニウム製の外装ケース８
に収納してその開口部をゴムパッキング１０にて封止
し、定格電圧を印加しながら１２５℃で１時間のエージ
ングを行なうという構成、製法を採用してもよい。Alternatively, after a conductive polymer layer is formed in the capacitor element, a known electrolytic solution for a non-solid electrolytic capacitor (for example, γ-butyrolactone, ethylene glycol, xylene or the like as a main solvent and phthalic acid , An electrolytic solution containing an amidine salt such as adipic acid, an amine salt, an ammonium salt or the like as a main solute), and as shown in FIG.
And the opening thereof is sealed with a rubber packing 10 and aging is performed at 125 ° C. for 1 hour while applying a rated voltage.
【００２４】ここで、外形φ６．３ｍｍ×Ｈ７ｍｍ、定
格６．３Ｖ−５６μＦのアルミニウム巻回型コンデンサ
素子を用い、上記本発明の実施形態に準じながら表１に
示すような条件で試作した実施例１から１２及び比較例
１、２の電解コンデンサについて、１０５℃×１０００
時間の高温負荷試験を行った。高温負荷試験前の静電容
量：Ｃ（μＦ）、高温負荷試験前後における静電容量変
化率：ΔＣ／Ｃ（％）、損失角の正接：ｔａｎδ、定格
電圧を印加してから１５秒後の漏れ電流：ＬＣ（μ
Ａ）、１００ｋＨｚでの等価直列抵抗：ＥＳＲ（ｍΩ）
の測定結果を表２に示す。Here, an example in which an aluminum winding type capacitor element having an outer diameter of 6.3 mm × H7 mm and a rating of 6.3 V-56 μF was used under the conditions shown in Table 1 according to the above embodiment of the present invention. 105 ° C. × 1000 for the electrolytic capacitors of 1 to 12 and Comparative Examples 1 and 2.
A time high temperature load test was performed. Capacitance before high-temperature load test: C (μF), capacitance change rate before and after high-temperature load test: ΔC / C (%), loss angle tangent: tan δ, 15 seconds after application of rated voltage Leakage current: LC (μ
A), Equivalent series resistance at 100 kHz: ESR (mΩ)
Table 2 shows the measurement results.
【００２５】[0025]
【表１】 [Table 1]
【００２６】[0026]
【表２】 [Table 2]
【００２７】表１及び表２を対照すればわかるように、
本発明に従って酸化剤溶液に界面活性剤を添加した実施
例１から１２においては、酸化剤溶液に界面活性剤を添
加しない比較例１、２に比べて、高温負荷試験の前後の
いずれにおいても良好な特性を示している。As can be seen by comparing Tables 1 and 2,
In Examples 1 to 12 in which the surfactant was added to the oxidant solution according to the present invention, better before and after the high-temperature load test than in Comparative Examples 1 and 2 in which the surfactant was not added to the oxidant solution. Characteristic.
【００２８】これは、ピロールモノマーを含浸させたコ
ンデンサ素子を酸化剤溶液に浸漬したときに、界面活性
剤の働きにより酸化剤が素子内部に均一に浸透し、その
結果、素子内部に均一に導電性ポリマー層が形成される
ためである。This is because when the capacitor element impregnated with the pyrrole monomer is immersed in the oxidizing agent solution, the oxidizing agent uniformly penetrates into the element by the action of the surfactant, and as a result, the conductive element is uniformly conductive inside the element. This is because a conductive polymer layer is formed.
【００２９】尚、上記実施例１から１２においては、酸
化重合により導電性ポリマーとなるモノマーとしてピロ
ールモノマーを用いたが、その代わりに、チオフェン、
フラン、アニリン、或いはそれらの誘導体等、酸化重合
により導電性ポリマーとなる各種モノマーを用いてもよ
い。In Examples 1 to 12, a pyrrole monomer was used as a monomer which becomes a conductive polymer by oxidative polymerization.
Various monomers, such as furan, aniline, and derivatives thereof, which become conductive polymers by oxidative polymerization may be used.
【００３０】又、コンデンサ完成品の外装に関して、コ
ンデンサ素子を外装ケースに収納して樹脂又はゴムパッ
キングにて封止する代わりに、ディッピング法等により
外装樹脂層を形成してもよい。Regarding the exterior of the completed capacitor, an exterior resin layer may be formed by a dipping method or the like instead of housing the capacitor element in an exterior case and sealing it with resin or rubber packing.
【００３１】[0031]
【発明の効果】本発明によれば、酸化重合により導電性
ポリマーとなるモノマーを含浸させたコンデンサ素子
を、界面活性剤を添加した高濃度の酸化剤水溶液に浸漬
することにより、前記モノマーを急速かつ均一に重合さ
せることができ、該モノマーのコンデンサ素子外への流
出も抑制され、コンデンサ素子内に均一に導電性ポリマ
ー層が形成されて、大容量、低ＥＳＲの電解コンデンサ
が提供される。According to the present invention, a capacitor element impregnated with a monomer which becomes a conductive polymer by oxidative polymerization is immersed in a high-concentration aqueous solution of an oxidizing agent to which a surfactant is added, so that the monomer can be rapidly reduced. In addition, the monomer can be polymerized uniformly, the outflow of the monomer to the outside of the capacitor element is suppressed, and the conductive polymer layer is uniformly formed in the capacitor element, thereby providing a large capacity, low ESR electrolytic capacitor.
【００３２】又、本発明に従って導電性ポリマー層を形
成したコンデンサ素子に、電解液を含浸させれば、陽極
化成皮膜の損傷部の修復力が向上して、コンデンサ完成
品としての漏れ電流が低減する。When a capacitor element having a conductive polymer layer formed according to the present invention is impregnated with an electrolytic solution, the ability to repair damaged portions of the anodized chemical film is improved, and the leakage current as a finished capacitor product is reduced. I do.
【００３３】更に、本発明に用いられるコンデンサ素子
としては、既存のアルミニウム電解コンデンサ用の巻回
型コンデンサ素子そのものを転用することが可能である
ので、部品の共通化によるコストダウンを図ることもで
きる。Further, as the capacitor element used in the present invention, an existing wound-type capacitor element for an aluminum electrolytic capacitor itself can be diverted, so that the cost can be reduced by sharing parts. .
【図１】本発明実施例及び従来例において用いられるコ
ンデンサ素子の分解斜視図である。FIG. 1 is an exploded perspective view of a capacitor element used in an embodiment of the present invention and a conventional example.
【図２】本発明実施例による電解コンデンサの断面図で
ある。FIG. 2 is a sectional view of an electrolytic capacitor according to an embodiment of the present invention.
【図３】本発明実施例による電解コンデンサの断面図で
ある。FIG. 3 is a sectional view of an electrolytic capacitor according to an embodiment of the present invention.
１ 陽極化成箔 ２ 対向陰極箔 ３ セパレータ ４ 巻き止めテープ ５１ 陽極リード線 ５２ 陰極リード線 ６１ 陽極リードタブ ６２ 陰極リードタブ ７ コンデンサ素子 ８ 外装ケース ９ 封口樹脂 １０ 封口ゴム DESCRIPTION OF SYMBOLS 1 Anodized chemical foil 2 Counter cathode foil 3 Separator 4 Winding tape 51 Anode lead wire 52 Cathode lead wire 61 Anode lead tab 62 Cathode lead tab 7 Capacitor element 8 Outer case 9 Sealing resin 10 Sealing rubber
───────────────────────────────────────────────────── フロントページの続き (72)発明者 朝倉 利之 大阪府四条畷市岡山東１丁目１番18号 サ ン電子工業株式会社内 (72)発明者 鹿熊 健二 大阪府四条畷市岡山東１丁目１番18号 サ ン電子工業株式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiyuki Asakura 1-1-18 Okayama Higashi, Shijonawate City, Osaka Prefecture Inside San Electronics Industry Co., Ltd. (72) Inventor Kenji Kakuma 1-1-1, Okayama Higashi, Shijonawate City, Osaka Prefecture No. 18 San Electronics Industry Co., Ltd.
Claims (2)
を介して巻回してなるコンデンサ素子内に、導電性ポリ
マー層を形成した電解コンデンサの製造方法において、 酸化重合により導電性ポリマーとなるモノマーを前記コ
ンデンサ素子に含浸させた後、該コンデンサ素子を酸化
剤及び界面活性剤を含む溶液に浸漬することにより、該
コンデンサ素子内に導電性ポリマー層を形成することを
特徴とする電解コンデンサの製造方法。1. A method for manufacturing an electrolytic capacitor in which a conductive polymer layer is formed in a capacitor element formed by winding an anodized foil and a counter cathode foil via a separator, comprising: a monomer which becomes a conductive polymer by oxidative polymerization; And then immersing the capacitor element in a solution containing an oxidizing agent and a surfactant to form a conductive polymer layer in the capacitor element. Method.
を介して巻回してなるコンデンサ素子内に、導電性ポリ
マー層を形成すると共に電解液を含浸させた電解コンデ
ンサの製造方法において、 酸化重合により導電性ポリマーとなるモノマーを前記コ
ンデンサ素子に含浸させた後、該コンデンサ素子を酸化
剤及び界面活性剤を含む溶液に浸漬することにより、該
コンデンサ素子内に導電性ポリマー層を形成し、 前記導電性ポリマー層を形成したコンデンサ素子内に、
電解液を含浸させることを特徴とする電解コンデンサの
製造方法。2. A method for producing an electrolytic capacitor, comprising forming a conductive polymer layer and impregnating an electrolytic solution in a capacitor element formed by winding an anodized aluminum foil and a counter cathode foil via a separator, comprising: After impregnating the capacitor element with a monomer that becomes a conductive polymer by the above, by immersing the capacitor element in a solution containing an oxidizing agent and a surfactant, to form a conductive polymer layer in the capacitor element, In the capacitor element with the conductive polymer layer formed,
A method for producing an electrolytic capacitor, characterized by impregnating an electrolytic solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11027478A JP2000228331A (en) | 1999-02-04 | 1999-02-04 | Manufacture of electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11027478A JP2000228331A (en) | 1999-02-04 | 1999-02-04 | Manufacture of electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000228331A true JP2000228331A (en) | 2000-08-15 |
Family
ID=12222240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11027478A Pending JP2000228331A (en) | 1999-02-04 | 1999-02-04 | Manufacture of electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000228331A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002110465A (en) * | 2000-10-02 | 2002-04-12 | Rubycon Corp | Solid-state electrolytic capacitor and method of manufacturing the same |
| WO2006054795A1 (en) * | 2004-11-19 | 2006-05-26 | Showa Denko K.K. | Solid electrolytic capacitor and method for producing the same |
| JP2007157875A (en) * | 2005-12-02 | 2007-06-21 | Showa Denko Kk | Solid electrolytic capacitor and manufacturing method thereof |
| CN102201286A (en) * | 2010-03-24 | 2011-09-28 | 三洋电机株式会社 | Method for manufacturing solid electrolytic capacitor |
| WO2021132223A1 (en) * | 2019-12-24 | 2021-07-01 | パナソニックＩｐマネジメント株式会社 | Electrolytic capacitor and method for producing same |
-
1999
- 1999-02-04 JP JP11027478A patent/JP2000228331A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002110465A (en) * | 2000-10-02 | 2002-04-12 | Rubycon Corp | Solid-state electrolytic capacitor and method of manufacturing the same |
| WO2006054795A1 (en) * | 2004-11-19 | 2006-05-26 | Showa Denko K.K. | Solid electrolytic capacitor and method for producing the same |
| JP2006173593A (en) * | 2004-11-19 | 2006-06-29 | Showa Denko Kk | Solid electrolytic capacitor and manufacturing method thereof |
| US7691157B2 (en) | 2004-11-19 | 2010-04-06 | Murata Manufacturing Co., Ltd. | Solid electrolytic capacitor and method for producing the same |
| TWI425541B (en) * | 2004-11-19 | 2014-02-01 | Murata Manufacturing Co | Solid electrolytic capacitor and manufacturing method thereof |
| JP2007157875A (en) * | 2005-12-02 | 2007-06-21 | Showa Denko Kk | Solid electrolytic capacitor and manufacturing method thereof |
| CN102201286A (en) * | 2010-03-24 | 2011-09-28 | 三洋电机株式会社 | Method for manufacturing solid electrolytic capacitor |
| WO2021132223A1 (en) * | 2019-12-24 | 2021-07-01 | パナソニックＩｐマネジメント株式会社 | Electrolytic capacitor and method for producing same |
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