JPH0715862B2 - Electrolytic capacitor - Google Patents
Electrolytic capacitorInfo
- Publication number
- JPH0715862B2 JPH0715862B2 JP19886387A JP19886387A JPH0715862B2 JP H0715862 B2 JPH0715862 B2 JP H0715862B2 JP 19886387 A JP19886387 A JP 19886387A JP 19886387 A JP19886387 A JP 19886387A JP H0715862 B2 JPH0715862 B2 JP H0715862B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic capacitor
- layer
- oxide film
- polypyrrole layer
- film
- 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.)
- Expired - Fee Related
Links
- 239000003990 capacitor Substances 0.000 title claims description 23
- 229920000128 polypyrrole Polymers 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 239000011888 foil Substances 0.000 description 7
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 229910052709 silver Inorganic materials 0.000 description 6
- 239000004332 silver Substances 0.000 description 6
- 239000007784 solid electrolyte Substances 0.000 description 5
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- IZJSTXINDUKPRP-UHFFFAOYSA-N aluminum lead Chemical compound [Al].[Pb] IZJSTXINDUKPRP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は、ポリピロール層を固体電解質として用いた電
解コンデンサに関する。DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to an electrolytic capacitor using a polypyrrole layer as a solid electrolyte.
（従来の技術） 従来のポリピロールを固体電解質とした電解コンデンサ
は、たとえば特開昭60−245209号公報に記載され、第４
図に示すような構成をしている。この第４図は積層形の
電解コンデンサ素子の斜視図を表わしている。この電解
コンデンサ素子では、アルミ箔の皮膜形成性金属11に誘
電体酸化皮膜12を形成し、この上に陽極引出部13を残し
てポリピロール層14を電解重合により形成する。さら
に、この上に陽極引出部13にはみ出さないようにグラフ
ァイト層15,銀ペースト層16,半田層17を形成する。この
構成においてポリピロール層は、電解コンデンサの固体
電解質として作用する。(Prior Art) A conventional electrolytic capacitor using polypyrrole as a solid electrolyte is disclosed in, for example, Japanese Patent Application Laid-Open No. 60-245209.
The configuration is as shown in the figure. This FIG. 4 shows a perspective view of a laminated electrolytic capacitor element. In this electrolytic capacitor element, a dielectric oxide film 12 is formed on a film-forming metal 11 of aluminum foil, and a polypyrrole layer 14 is formed by electrolytic polymerization while leaving an anode lead portion 13 on the dielectric oxide film 12. Further, a graphite layer 15, a silver paste layer 16 and a solder layer 17 are formed on this so that the graphite layer 15, the silver paste layer 16 and the solder layer 17 do not protrude into the anode lead portion 13. In this configuration, the polypyrrole layer acts as a solid electrolyte for the electrolytic capacitor.
このような素子を複数枚積層して陽極引出部13と半田層
17より電極を引出し電解コンデンサを構成していた。A plurality of such elements are laminated to form an anode lead portion 13 and a solder layer.
The electrode was pulled out from 17 to form an electrolytic capacitor.
（発明が解決しようとする問題点） 前記の構成による電解コンデンサでは、各コンデンサ素
子に陽極引出部13をもつが、この部分は静電容量に寄与
しないので単位体積当たりの静電容量が減少する。この
傾向は、素子寸法が小さくなるにつれて顕著となる。陽
極引出部13の寸法は、素子寸法にかかわらず一定である
ため、このような現象が表われる。(Problems to be Solved by the Invention) In the electrolytic capacitor having the above-described configuration, each capacitor element has the anode lead portion 13, but since this portion does not contribute to the capacitance, the capacitance per unit volume is reduced. . This tendency becomes remarkable as the element size becomes smaller. Such a phenomenon appears because the dimension of the anode lead portion 13 is constant regardless of the element dimension.
この発明は、ポリピロール層を固体電解質として用いる
電解コンデンサにおいて、単位体積当たりの静電容量を
高めるようにした電解コンデンサを提供しようとするも
のである。The present invention is intended to provide an electrolytic capacitor using a polypyrrole layer as a solid electrolyte in which the electrostatic capacity per unit volume is increased.
［発明の構成］ （問題点を解決するための手段） この発明になる電解コンデンサは皮膜形成性金属に誘電
体酸化皮膜を形成し、この誘電体酸化皮膜にあらかじめ
誘電体酸化皮膜を形成した引出端子を接続し、その後固
体電解質であるポリピロール層を形成するものであり、
このようにして作製したコンデンサ素子を巻回あるいは
折りたたんで電解コンデンサとするものである。[Structure of the Invention] (Means for Solving Problems) The electrolytic capacitor according to the present invention is a drawer in which a dielectric oxide film is formed on a film-forming metal, and the dielectric oxide film is previously formed on the dielectric oxide film. The terminals are connected, and then a polypyrrole layer that is a solid electrolyte is formed.
The capacitor element thus manufactured is wound or folded to form an electrolytic capacitor.
（作用） この発明になる電解コンデンサでは、陽極引出端子を皮
膜形成性金属に接続したのちにポリピロール層を形成す
ることによって、積層形での各素子の陽極端子引出部が
不必要となるため単位体積当たりの静電容量を大きくす
ることが可能となる。(Function) In the electrolytic capacitor according to the present invention, by connecting the anode lead terminal to the film-forming metal and then forming the polypyrrole layer, the anode terminal lead portion of each element in the laminated type is not necessary It is possible to increase the capacitance per volume.
（実施例） 以下、この発明を図面に示した実施例に基づき説明す
る。第１図はこの発明の電解コンデンサの実施例のポリ
ピロール層形成後の平面図を示している。第２図は第１
図のＡ−Ａ′での断面図を示している。すなわち、皮膜
形成性金属１に陽極酸化によって誘電体酸化皮膜２を形
成する。この誘電体酸化皮膜２が形成された皮膜形成性
金属１にたとえば皮膜形成性金属よりなる引出端子３を
超音波溶接により接続し、引出端子３を接続後電解重合
によりポリピロール層４を形成する。第３図にこの発明
の電解コンデンサの実施例の断面図を示す。上記方法に
より作製した皮膜形成性金属を巻回し、陰極引出しのた
め銀ペースト層５を形成し陰極とする。(Example) Hereinafter, the present invention will be described based on an example shown in the drawings. FIG. 1 shows a plan view of an embodiment of an electrolytic capacitor of the present invention after forming a polypyrrole layer. Figure 2 shows the first
A cross-sectional view taken along line AA ′ of the drawing is shown. That is, the dielectric oxide film 2 is formed on the film-forming metal 1 by anodic oxidation. A lead terminal 3 made of, for example, a film-forming metal is connected to the film-forming metal 1 on which the dielectric oxide film 2 is formed by ultrasonic welding, and after connecting the lead terminal 3, a polypyrrole layer 4 is formed by electrolytic polymerization. FIG. 3 shows a sectional view of an embodiment of the electrolytic capacitor of the present invention. The film-forming metal produced by the above method is wound, and a silver paste layer 5 is formed for drawing out the cathode to form a cathode.
つぎに本発明と従来の参考例との比較の一例について述
べる。Next, an example of comparison between the present invention and a conventional reference example will be described.
実施例 化成電圧50Vで１cm2当たり12μＦのアルミニウムの粗面
化箔を使用して定格電圧25V,定格容量10μＦの電解コン
デンサを試作した。化成を行った粗面化箔を幅5mm,長さ
16.6mmに切断し、幅1mm,長さ7mmのアルミニウム製の引
出端子を第１図の如く超音波溶接で接続する。接続後ピ
ロールのアセトニトリル溶液中に粗面化箔を完全に入れ
引出端子を電源の陽極に接続し1mA/cm2の電流密度で電
解重合を行い、ポリピロール層を形成する。ポリピロー
ル層を形成後巻回を行い引出端子の出ている方向とは反
対の面に第３図の如く銀ペーストを塗布し乾燥を行っ
た。Example An electrolytic capacitor having a rated voltage of 25 V and a rated capacity of 10 μF was manufactured by using a roughened aluminum foil having a formation voltage of 50 V and 12 μF per 1 cm 2 . Formed roughened foil with a width of 5 mm and length
Cut to 16.6 mm, and connect aluminum lead terminals with a width of 1 mm and a length of 7 mm by ultrasonic welding as shown in FIG. After the connection, the roughened foil is completely put in the acetonitrile solution of pyrrole, the extraction terminal is connected to the anode of the power source, and electrolytic polymerization is performed at a current density of 1 mA / cm 2 to form a polypyrrole layer. After forming the polypyrrole layer, it was wound, and a silver paste was applied to the surface opposite to the direction in which the lead terminal was exposed as shown in FIG. 3 and dried.
参考例 実施例と同じく化成を行った粗面化箔を幅5mm,長さ5.15
mmに切断しピロールのアセトニトリル溶液中に陽極引出
部として1mmを残して粗面化箔を入れ電流密度1mA/cm2の
電流密度で電解重合を行いポリピロール層を形成する。
このようにして作製した前述の第４図に示すような単位
素子を４枚積層し、陽極引出部およびその反対面に銀ペ
ーストを塗布・乾燥して陽極，陰極を形成する。Reference example A roughened foil that was formed in the same way as in the example was used with a width of 5 mm and length of 5.15
After cutting into mm, a roughened foil is put in an acetonitrile solution of pyrrole, leaving 1 mm as an anode extraction part, and electrolytic polymerization is carried out at a current density of 1 mA / cm 2 to form a polypyrrole layer.
Four unit elements as shown in FIG. 4 prepared in this way are laminated, and silver paste is applied and dried on the anode lead-out portion and the opposite surface to form an anode and a cathode.
この場合において、前述の如くポリピロール層は陰極と
して作用するため、陽極引出端子の接続部を残してポリ
ピロール層を形成しなければならない。よってポリピロ
ール層形成時、金属箔の一端部を引出端子接続部として
残しても陽極，陰極の引出構造上大形化するので、第４
図の如き積層構造を参考例とした。In this case, since the polypyrrole layer acts as a cathode as described above, the polypyrrole layer must be formed while leaving the connection portion of the anode lead terminal. Therefore, when the polypyrrole layer is formed, even if one end of the metal foil is left as the lead terminal connection portion, the size of the lead structure of the anode and the cathode becomes large.
The laminated structure shown in the figure was used as a reference example.
このように、上記本発明による実施例と参考例の体積を
計算すると、表１のようになる。As described above, when the volumes of the embodiment according to the present invention and the reference example are calculated, the results are shown in Table 1.
体積当たりの静電容量では、本発明は参考例と比較して
23％も大きくなっており、本発明の優れた効果を実証し
た。 In terms of capacitance per volume, the present invention compares with the reference example.
It was as large as 23%, demonstrating the excellent effect of the present invention.
［発明の効果］ 本発明によれば、小形化はもとよりコストダウンに貢献
できる実用的価値の高い電解コンデンサを得ることがで
きる。[Effects of the Invention] According to the present invention, it is possible to obtain an electrolytic capacitor of high practical value that contributes to cost reduction as well as size reduction.
第１図は本発明の一実施例に係る電解コンデンサのポリ
ピロール層形成後の平面図、第２図は第１図のＡ−Ａ′
での断面図、第３図は電解コンデンサの断面図、第４図
は従来の電解コンデンサ素子の斜視図である。 １……皮膜形成性金属 ２……誘電体酸化皮膜 ３……引出端子 ４……ポリピロール層 ５……銀ペースト層FIG. 1 is a plan view of an electrolytic capacitor according to an embodiment of the present invention after a polypyrrole layer is formed, and FIG. 2 is AA ′ of FIG.
3 is a sectional view of an electrolytic capacitor, and FIG. 4 is a perspective view of a conventional electrolytic capacitor element. 1 ... Film forming metal 2 ... Dielectric oxide film 3 ... Lead terminal 4 ... Polypyrrole layer 5 ... Silver paste layer
Claims (1)
し、この誘電体酸化皮膜上にポリピロール層を形成した
電極を用いる電解コンデンサにおいて、前記誘電体酸化
皮膜を形成した金属にあらかじめ誘電体酸化皮膜を形成
した引出端子を接続し、この金属および引出端子上にポ
リピロール層を形成したことを特徴とする電解コンデン
サ。1. An electrolytic capacitor using an electrode in which a dielectric oxide film is formed on a film-forming metal and a polypyrrole layer is formed on the dielectric oxide film, and a dielectric is previously formed on the metal on which the dielectric oxide film is formed. An electrolytic capacitor characterized in that a lead terminal formed with an oxide film is connected and a polypyrrole layer is formed on the metal and the lead terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19886387A JPH0715862B2 (en) | 1987-08-07 | 1987-08-07 | Electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19886387A JPH0715862B2 (en) | 1987-08-07 | 1987-08-07 | Electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6442113A JPS6442113A (en) | 1989-02-14 |
| JPH0715862B2 true JPH0715862B2 (en) | 1995-02-22 |
Family
ID=16398174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19886387A Expired - Fee Related JPH0715862B2 (en) | 1987-08-07 | 1987-08-07 | Electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0715862B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0471242A3 (en) * | 1990-08-13 | 1992-03-18 | Siemens Aktiengesellschaft | Solid electrolytic capacitor |
-
1987
- 1987-08-07 JP JP19886387A patent/JPH0715862B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6442113A (en) | 1989-02-14 |
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