JPH03203214A - Capacitor - Google Patents
CapacitorInfo
- Publication number
- JPH03203214A JPH03203214A JP34073289A JP34073289A JPH03203214A JP H03203214 A JPH03203214 A JP H03203214A JP 34073289 A JP34073289 A JP 34073289A JP 34073289 A JP34073289 A JP 34073289A JP H03203214 A JPH03203214 A JP H03203214A
- Authority
- JP
- Japan
- Prior art keywords
- conductive polymer
- conductive
- polymer film
- capacitor
- dielectric oxide
- 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 30
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 15
- 239000004020 conductor Substances 0.000 claims abstract description 8
- 239000007784 solid electrolyte Substances 0.000 claims abstract description 6
- 230000003647 oxidation Effects 0.000 claims abstract description 5
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 5
- 229920001940 conductive polymer Polymers 0.000 claims description 26
- 229920000128 polypyrrole Polymers 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000007800 oxidant agent Substances 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000003822 epoxy resin Substances 0.000 abstract description 4
- 229920000647 polyepoxide Polymers 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 238000010030 laminating Methods 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 239000010408 film Substances 0.000 description 25
- 230000001590 oxidative effect Effects 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000011888 foil Substances 0.000 description 5
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 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
- 239000010409 thin film Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 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
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920000414 polyfuran Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920000123 polythiophene Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000003115 supporting electrolyte Substances 0.000 description 1
- DZLFLBLQUQXARW-UHFFFAOYSA-N tetrabutylammonium Chemical compound CCCC[N+](CCCC)(CCCC)CCCC DZLFLBLQUQXARW-UHFFFAOYSA-N 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-M toluene-4-sulfonate Chemical compound CC1=CC=C(S([O-])(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-M 0.000 description 1
Landscapes
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、電気機器、電子機器の電子回路などに使用す
るコンデンサに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a capacitor used in electrical equipment, electronic circuits of electronic equipment, and the like.
従来の技術
機器の小形・軽量化志向、高集積回路の採用による電子
回路の高密度化、あるいは自動挿入の普及などに伴い、
電子部品に対する高性能化の要望が１すます強くなって
きている。その中にあって、コンデンサも同様に、高周
波特性の優れた大容量コンデンサの開発が種々試みられ
ている。高周波特性の優れたコンデンサには、フィルム
、マイカ、セラミック等を誘電体としたコンデンサがあ
るが、１μＦ以上の静電容量を得ようとすると、形状が
大きくなり１価格も高くなるため、実用上不向きである
。With the trend toward smaller and lighter conventional technological equipment, the increased density of electronic circuits through the adoption of highly integrated circuits, and the spread of automatic insertion,
Demand for higher performance electronic components is becoming increasingly strong. Among these, various attempts have been made to develop large capacity capacitors with excellent high frequency characteristics. Capacitors with excellent high frequency characteristics include capacitors using films, mica, ceramics, etc. as dielectric materials, but if you try to obtain a capacitance of 1 μF or more, the size will be large and the price will be high, so it is not practical. Not suitable.
筐た、大容量コンデンサとして知られているアルミ固体
電解コンデンサでは高周波特性が劣るため、固体電解コ
ンデンサで、高周波特性の優れたコンデンサとして、固
体電解質に導電性高分子を用いた固体電解コンデンサが
最近出現してきてい３ ・＼ ／
る。（特開昭８３−１５８８２９号、特開昭６３１７３
３１３号）
発明が解決しようとする課題
固体電解質に導電性高分子を用いた固体電解コンデンサ
は、大容量を得るために巻回すると、弁金属上に形成さ
れた誘電体酸化皮膜が応力によりクラックが入りやすく
、しかも高電圧になればなるほど誘電体酸化皮膜が厚く
なるため巻回による応力が大きい。また、巻回により弁
金属上に形成された誘電体酸化皮膜の面積が大きくなシ
、リード線からの距離が増すため、誘導リアクタンスが
増加して、コンデンサ特性を悪くするという欠点を有し
ていた。Since aluminum solid electrolytic capacitors, which are known as high-capacity capacitors, have poor high-frequency characteristics, solid electrolytic capacitors that use a conductive polymer as a solid electrolyte have recently been developed as solid electrolytic capacitors with excellent high-frequency characteristics. It's starting to appear 3 ・＼／. (JP-A No. 83-158829, JP-A-63173
(No. 313) Problems to be Solved by the Invention When a solid electrolytic capacitor using a conductive polymer as a solid electrolyte is wound to obtain a large capacity, the dielectric oxide film formed on the valve metal cracks due to stress. Moreover, the higher the voltage, the thicker the dielectric oxide film becomes, so the stress caused by winding becomes greater. In addition, the area of the dielectric oxide film formed on the valve metal due to winding is large, and the distance from the lead wire increases, which increases inductive reactance and deteriorates capacitor characteristics. Ta.
本発明は、上記従来の問題点を解決するもので、高電圧
で、高周波特性の優れたコンデンサを提供することを目
的とする。The present invention solves the above conventional problems, and aims to provide a capacitor with high voltage and excellent high frequency characteristics.
課題を解決するための手段
この目的を遠戚するために本発明のコンデンサは、弁金
属の表面に誘電体酸化皮膜を形成し、該誘電体酸化皮膜
上に酸化剤を用いて化学酸化重合した導電性高分子膜を
形成し、更に該導電性高分子膜上に電解重合により得ら
れる導電性高分子膜を形成して、二重に形成された導電
性高分子膜を固体電解質とする固体電解コンデンサ素子
を、導電材料を用いて２個以上積層したものである。Means for Solving the Problems In order to achieve this object distantly, the capacitor of the present invention is provided by forming a dielectric oxide film on the surface of the valve metal, and chemically oxidizing and polymerizing the dielectric oxide film using an oxidizing agent. A solid that forms a conductive polymer film, and further forms a conductive polymer film obtained by electrolytic polymerization on the conductive polymer film, and uses the double-formed conductive polymer film as a solid electrolyte. Two or more electrolytic capacitor elements are laminated using a conductive material.
作 用
本発明にかかるコンデンサは、第１図に示すようにエツ
チングして表面を粗面化ｌ〜た弁金属１１゜２１を陽極
酸化または空気酸化によシ弁金属の酸化物を生成させ、
誘電体酸化皮膜１２．２２を作成する。弁金属としては
アルミニウム、タンタル、ニオブなどが使用できるが安
価で汎用されているアルミニウム、タンタルが好ましい
。ついで誘電体酸化皮膜１２ 、２２上に化学酸化重合
による導電性高分子膜１３ 、２３を形成し、表面を導
電化する。ついで化学酸化重合による導電性高分子膜を
陽極として電解液中にて電解酸化重合を行うど、化学酸
化重合による導電性高分子膜１３．２３の上に、電解酸
化重合された強靭な導電性高分子膜１４．２４が得られ
る。導電性高分子としてはボ５ ・＼−７
リビロール、ポリチオフェン、ポリアニリン、ポリフラ
ンなどが使用できるが導電性高分子の安定性の点から特
に好曾しくはポリピロールである。Function The capacitor according to the present invention is produced by etching the valve metal 11 to 21 whose surface has been roughened, as shown in FIG.
A dielectric oxide film 12.22 is created. Aluminum, tantalum, niobium, etc. can be used as the valve metal, but aluminum and tantalum are preferred because they are inexpensive and commonly used. Next, conductive polymer films 13 and 23 are formed on the dielectric oxide films 12 and 22 by chemical oxidation polymerization to make the surfaces electrically conductive. Next, electrolytic oxidative polymerization is performed in an electrolytic solution using a conductive polymer film formed by chemical oxidative polymerization as an anode, and a strong conductive film formed by electrolytic oxidative polymerization is formed on top of the conductive polymer film 13.23 formed by chemical oxidative polymerization. A polymer film 14.24 is obtained. Examples of conductive polymers that can be used include libirole, polythiophene, polyaniline, and polyfuran, but polypyrrole is particularly preferred from the standpoint of stability of the conductive polymer.
ついで電解酸化重合された導電性高分子膜１４と弁金属
２１を導電材料によシ積層を行う。更に弁金属１１を一
方の電極とし、電解酸化重合された導電性高分子膜２４
を他方の電極とし、エポキシ樹脂などにより外装すると
第１図の構成のコンデンサとなる。Next, the conductive polymer film 14 that has been electrolytically oxidized and polymerized and the valve metal 21 are laminated using a conductive material. Furthermore, a conductive polymer film 24 is electrolytically oxidized and polymerized using the valve metal 11 as one electrode.
When used as the other electrode and covered with epoxy resin or the like, a capacitor having the structure shown in FIG. 1 is obtained.
以上のような栴或によると、弁金属上に形成された誘電
体酸化皮膜に応力を加えることがなく、かつ、弁金属上
に形成された誘電体酸化皮膜とリード線の距離による誘
導リアクタンスヲ低くテキるため、高電圧で、高周波特
性の優れたコンデンサが得られる。According to Aru Sen, stress is not applied to the dielectric oxide film formed on the valve metal, and the inductive reactance due to the distance between the dielectric oxide film formed on the valve metal and the lead wire is reduced. Since the voltage is low, a capacitor with high voltage and excellent high frequency characteristics can be obtained.
実施例 以下、本発明の実施例について説明する。Example Examples of the present invention will be described below.
陽極酸化を施して表面に酸化アルミニウム誘電体を形成
させた厚さ６０μｍで６×５Ｂ角のアルミニウム陽極箔
を、過硫酸アンモニウム０．０４ｍｏ １ ／Ａ の水
溶液に減圧下で１０分間浸漬した後、乾燥した。これを
ピロール単量体２ｍｏｌ／Ｑを含むエタノール溶液に減
圧下で１０分間浸漬して、酸化アル□ニウム誘電体上に
ポリピロール薄膜を化学酸化重合法により形成させた。A 60 μm thick, 6×5B square aluminum anode foil that has been anodized to form an aluminum oxide dielectric on its surface is immersed in an aqueous solution of ammonium persulfate of 0.04 mo 1 /A for 10 minutes under reduced pressure, and then dried. did. This was immersed in an ethanol solution containing 2 mol/Q of pyrrole monomer under reduced pressure for 10 minutes to form a polypyrrole thin film on the aluminum oxide dielectric by chemical oxidative polymerization.
ついで上記処理を行ったアルミニウム陽極箔をビロール
単量体０．２ ｍｏ １／ｆｉおよび支持電解質として
パラトルエンスルホン酸テトラブチルアンモニウム０．
０５ｍｏ ｌ／、ｆ２を含むアセトニトリル中に浸漬し
た。該化学酸化重合したポリピロールを陽極とし、ステ
ンレス板を陰極として電流密度ｏ、ｓｍＡ／ｃｒ！の条
件下で１５０分間定電流電解を行った結果、均一な黒色
のポリピロールの薄膜が表面に形成した。ついで、この
表面と、アルミニウム陽極箔を、銀ペーストによシ積層
して乾燥した。ついで第１図のように電極を取り出し、
エポキシ樹脂によシ外装し、コンデンサを完成した。得
られたコンデンサ特性は１２０陽において静電容量２．
２μＦで誘電正接（ｔａｎδ）は１．０％で、１００ｋ
Ｈｚにおける専価直列抵抗（ＥＳＲ）は１０５ｍ０で、
破壊電圧は１７０■であった。Next, the aluminum anode foil subjected to the above treatment was mixed with 0.2 mo 1/fi of pyrrole monomer and 0.0 mo of tetrabutylammonium para-toluenesulfonate as a supporting electrolyte.
It was immersed in acetonitrile containing 05 mol/f2. Using the chemically oxidized polypyrrole as an anode and a stainless steel plate as a cathode, the current density is o, smA/cr! As a result of constant current electrolysis for 150 minutes under these conditions, a uniform black polypyrrole thin film was formed on the surface. This surface and aluminum anode foil were then laminated with silver paste and dried. Next, take out the electrode as shown in Figure 1,
The capacitor was completed by covering it with epoxy resin. The obtained capacitor characteristics are as follows: 120 positives, capacitance 2.
At 2 μF, the dielectric loss tangent (tan δ) is 1.0% and 100k
The dedicated series resistance (ESR) at Hz is 105m0,
The breakdown voltage was 170μ.
比較例
実施例と同様の箔を実施例と同様に電解重合１で行い、
電極を取ジ出し、エポキシ樹脂により外装し、コンデン
サを完成させた。得られたコンデンサ特性は１２０円に
おいて静電容量４．５μＦで誘電正Ｊ妾（Ｉａｎδ）は
１．０％で、１００に田にかける笠価直列抵抗（ＥＳＲ
）ば１０３ｍΩで、破壊電圧はｓｓＶであった。Comparative Example The same foil as in Example was subjected to electropolymerization 1 in the same manner as in Example.
The electrodes were removed and covered with epoxy resin to complete the capacitor. The obtained capacitor characteristics are that at 120 yen, the capacitance is 4.5 μF, the dielectric positive J value (Ian δ) is 1.0%, and the Kasada series resistance (ESR) is applied to 100 yen.
) was 103 mΩ, and the breakdown voltage was ssV.
発明の効果
以上のように本発明は、弁金属の表面に誘電体酸化皮膜
を形威し、該誘電体酸化皮膜上に酸化剤を用いて化学酸
化重合した導電性高分子膜を形成し、更に該導電性高分
子膜上に電解重合によシ得られる導電性高分子膜を形成
して、二重に形成された導電性高分子膜を固体電解質と
して用いたものに、導電材料で積層することによシ、同
じ陽極箔でも、高電圧で、高周波特性の優れたコンデン
サを実現できるものである。Effects of the Invention As described above, the present invention forms a dielectric oxide film on the surface of a valve metal, and forms a conductive polymer film chemically oxidized and polymerized using an oxidizing agent on the dielectric oxide film, Further, a conductive polymer membrane obtained by electrolytic polymerization is formed on the conductive polymer membrane, and a conductive material is laminated on the double formed conductive polymer membrane used as a solid electrolyte. By doing so, it is possible to realize a capacitor with high voltage and excellent high frequency characteristics even with the same anode foil.
第１図は本発明のコンデンサの一実施例を示す断面図で
ある。
１１．２１・・・・・・弁金属、１２．２２・・・・・
・誘電体酸化皮膜、１３ 、２３・・・・・・化学酸化
重合により形成した導電性高分子膜、１４ 、２４・・
・・・・電解重合により得られた導電性高分子膜、５・
・・・・・導電材料。FIG. 1 is a sectional view showing an embodiment of a capacitor of the present invention. 11.21... Valve metal, 12.22...
・Dielectric oxide film, 13, 23... Conductive polymer film formed by chemical oxidative polymerization, 14, 24...
... Conductive polymer membrane obtained by electrolytic polymerization, 5.
...Conductive material.
Claims (4)
体酸化皮膜上に酸化剤を用いて化学酸化重合した導電性
高分子膜を形成し、更に該導電性高分子膜上に電解重合
により得られる導電性高分子膜を形成して、二重に形成
された導電性高分子膜を固体電解質とする固体電解コン
デンサ素子を、導電材料を用いて２個以上積層したこと
を特徴とするコンデンサ。(1) A dielectric oxide film is formed on the surface of the valve metal, a conductive polymer film is formed on the dielectric oxide film by chemical oxidation polymerization using an oxidizing agent, and then a conductive polymer film is formed on the conductive polymer film. A conductive polymer film obtained by electrolytic polymerization is formed, and two or more solid electrolytic capacitor elements are stacked using a conductive material, using the double-formed conductive polymer film as a solid electrolyte. capacitor.
がポリピロールである請求項１記載のコンデンサ。(2) The capacitor according to claim 1, wherein the conductive polymer film chemically oxidized and polymerized using an oxidizing agent is polypyrrole.
ロールである請求項１記載のコンデンサ。(3) The capacitor according to claim 1, wherein the conductive polymer film obtained by electrolytic polymerization is polypyrrole.
銀ペーストである請求項１記載のコンデンサ。(4) The capacitor according to claim 1, wherein the conductive material is polypyrrole, carbon, or silver paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34073289A JPH03203214A (en) | 1989-12-29 | 1989-12-29 | Capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34073289A JPH03203214A (en) | 1989-12-29 | 1989-12-29 | Capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03203214A true JPH03203214A (en) | 1991-09-04 |
Family
ID=18339781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34073289A Pending JPH03203214A (en) | 1989-12-29 | 1989-12-29 | Capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03203214A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1073074A3 (en) * | 1999-07-30 | 2006-06-14 | Nec Tokin Corporation | Solid electrolytic capacitors and method for manufacturing the same |
-
1989
- 1989-12-29 JP JP34073289A patent/JPH03203214A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1073074A3 (en) * | 1999-07-30 | 2006-06-14 | Nec Tokin Corporation | Solid electrolytic capacitors and method for manufacturing the same |
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