【発明の詳細な説明】 産業上の利用分野 ポリピロールなどの導電性高分子膜を固体電解質とし
て用いたアルミニウム固体電解コンデンサに関するもの
である。Description: TECHNICAL FIELD The present invention relates to an aluminum solid electrolytic capacitor using a conductive polymer film such as polypyrrole as a solid electrolyte.
従来の技術 従来の固体電解質を用いたアルミニウム電解コンデン
サにおいては、あらかじめ粗面化したアルミニウム箔を
陽極酸化により誘電体被膜を形成し、この誘電体被膜を
形成したアルミニウム電極に各種金属板をリード引出し
端子として溶接し、電極を構成していたが、より小型の
固体電解コンデンサの要求に対応するため、粗面化倍率
の高いアルミニウム箔の適用が検討されている。しかし
ながら、粗面化倍率の高いアルミニウム箔は海綿状の粗
面化部分が厚くなり、さらにその表面には誘電体被膜が
形成されているため、溶接によりリード引出し端子と接
続した場合、その強度が十分確保できない。あるいは溶
接強度を補強するため、溶接部に樹脂を塗布するなどの
方法が検討されている。2. Description of the Related Art In a conventional aluminum electrolytic capacitor using a solid electrolyte, a dielectric film is formed by anodizing aluminum foil that has been roughened in advance, and various metal plates are drawn out to the aluminum electrode on which the dielectric film is formed. The electrodes were formed by welding as terminals, but in order to meet the demand for smaller solid electrolytic capacitors, the use of aluminum foil with a high surface roughening ratio is being studied. However, aluminum foil with a high surface roughening ratio has a spongy roughened part, and a dielectric coating is formed on its surface. We cannot secure enough. Alternatively, in order to reinforce the welding strength, a method such as applying a resin to a welded portion has been studied.
発明が解決しようとする課題 上述のような固体電解コンデンサにおいては、溶接強
度が十分確保できないため、粗面化倍率の高いアルミニ
ウム箔が使用できず、小型化できない問題を有してい
る。Problems to be Solved by the Invention In the solid electrolytic capacitor as described above, since sufficient welding strength cannot be ensured, there is a problem that an aluminum foil having a high surface roughening ratio cannot be used and the size cannot be reduced.
また、溶接部を樹脂により補強する方法は工程を複雑
化し、コストアップの要因となり、かつ安定な補強効果
も得られていないなどの問題があった。Further, the method of reinforcing the welded portion with a resin has a problem that the process is complicated and causes a cost increase, and a stable reinforcing effect is not obtained.
課題を解決するための手段 本発明は上述の課題を解決したもので、あらかじめ粗
面化したアルミニウムを主成分とする箔を陽極酸化によ
り誘電体被膜を形成し、この誘電体被膜を形成した電極
箔の端部と接するリード引出し端子部を広幅に形成し、
該広幅部を電極箔の長さ方向に折り返して電極箔を加圧
挟持し、折り返し片（表）とリード引出し端子（裏）の
表裏両側より溶接して電極を形成し、該電極の誘電体被
膜上にピロール、チオフェン、アニリン、フランの導電
性高分子膜を形成し、樹脂外装したことを特徴とする固
体電解コンデンサである。Means for Solving the Problems The present invention has solved the above-mentioned problems, and a dielectric film is formed by anodizing a foil containing aluminum as a main component, which has been roughened in advance, and an electrode formed with the dielectric film is formed. Form the lead lead terminal part in contact with the end of the foil wide,
The wide portion is folded back in the longitudinal direction of the electrode foil, the electrode foil is sandwiched under pressure, and the folded piece (front) and the lead out terminal (back) are welded from both front and back sides to form an electrode. A solid electrolytic capacitor characterized in that a conductive polymer film of pyrrole, thiophene, aniline, and furan is formed on a film, and is covered with a resin.
作用 この発明の溶接においては、溶接時の溶接電流が溶接
部に均一に流れ、かつ両面より加圧されながら溶接され
るため、アルミニウム箔の溶接部に存在する海綿状の粗
綿化部分あるいは誘電体被膜を破壊しながら溶接される
ため、強固に溶接できる。また両面での溶接となるた
め、より安定な溶接強度が確保できる。In the welding of the present invention, since the welding current during welding flows uniformly to the welded portion and is welded while being pressed from both sides, the spongy roughened portion or the dielectric existing in the welded portion of the aluminum foil is present. Since welding is performed while the body coating is broken, it can be firmly welded. In addition, since welding is performed on both sides, more stable welding strength can be secured.
実施例 厚さ150μｍのアルミニウム箔を塩酸水溶液中で交流
エッチングを行い、試料−１として表裏両側をそれぞれ
20μｍの深さまでエッチングを行った。また試料−２と
してアルミニウム箔の表裏両側をそれぞれ50μｍのエッ
チングを行った。さらにそれぞれアジピン酸アンモニウ
ム水溶液中で、50V相当の誘電体酸化被膜を形成し、第
２図のように従来の溶接方法により、製作したものと第
１図のようにリード引出し端子部を広幅に形成し、該広
幅部を電極箔の長さ方向に折り返して電極箔を加圧挟持
し、折り返し片（表）とリード引出し端子（裏）の表裏
両側より溶接して電極を形成し、引張強度を比較した。
その結果を第３図（イ）（試料１）、第３図（ロ）（試
料２）に示す。さらにそれらの各電極の誘電体層上にポ
リピロール層を形成し、さらにカーボン層を形成すると
ともに銀ペーストにより陰極を引出し、エポキシ樹脂に
て外装し、オープンの発生率（オープン発生数／試験
数）を比較した。その結果を第１表に示す。EXAMPLE An aluminum foil having a thickness of 150 μm was subjected to AC etching in an aqueous hydrochloric acid solution, and a sample-1 was prepared on both front and rear sides as a sample-1.
Etching was performed to a depth of 20 μm. Further, as Sample-2, both sides of the aluminum foil were etched by 50 μm on both sides. Further, a dielectric oxide film equivalent to 50 V is formed in an aqueous solution of ammonium adipate, and the lead-out terminal portion is formed wide by a conventional welding method as shown in FIG. Then, the wide portion is folded in the length direction of the electrode foil, the electrode foil is sandwiched under pressure, and the folded piece (front) and the lead-out terminal (back) are welded from both front and back sides to form an electrode. Compared.
The results are shown in FIG. 3 (a) (sample 1) and FIG. 3 (b) (sample 2). Further, a polypyrrole layer is formed on the dielectric layer of each of those electrodes, a carbon layer is formed, the cathode is drawn out with a silver paste, and the package is covered with an epoxy resin, and the rate of occurrence of openness (number of openness / number of tests) Were compared. Table 1 shows the results.
本発明による溶接強度が高く、樹脂外装によるストレ
スにも耐えうることが立証された。It has been proved that the welding strength according to the present invention is high and can withstand the stress caused by the resin sheath.
発明の効果 以上のとおり、あらかじめ粗面化したアルミニウム箔
を陽極酸化により誘電体被膜を形成し、この誘電体被膜
を形成した電極箔の端部と接するリード引出し端子部を
広幅に形成し、該広幅部を電極箔の長さ方向に折り返し
て電極箔を加圧挟持し、折り返し片（表）とリード引出
し端子（裏）の表裏両側より溶接して電極を形成し、該
電極の誘電体被膜上にピロール、チオフェン、アニリ
ン、フランの導電性高分子膜を形成し、樹脂外装したこ
とを特徴とする固体電解コンデンサは安定な特性を示
し、工業的ならびに実用的価値大なるものである。 Effect of the Invention As described above, a dielectric film is formed by anodizing an aluminum foil that has been roughened in advance, and a lead extraction terminal portion that is in contact with an end of the electrode foil on which the dielectric film is formed is formed to have a wide width. The wide portion is folded back in the length direction of the electrode foil to press and hold the electrode foil, and the folded piece (front) and the lead-out terminal (back) are welded from both the front and back sides to form an electrode, and the dielectric coating of the electrode is formed. A solid electrolytic capacitor characterized by forming a conductive polymer film of pyrrole, thiophene, aniline, and furan thereon and being covered with a resin exhibits stable characteristics and is of great industrial and practical value.
第１図は本発明に係る電極箔と引出し端子の接続部の各
々異なる実施例で、（イ）は表側、（ロ）は裏側の斜視
図、第２図は従来の電極箔と引出し端子の接続部の斜視
図、第３図（イ）は試料−１に基づく本発明品と従来品
における引出し端子接続部の引張強度の比較図、第３図
（ロ）は試料−２に基づく本発明品と従来品における引
出し端子接続部の引張強度の比較図である。 1:アルミニウム電極 2:引出し端子 ３、4:リード引出し端部の折り返し片FIGS. 1A and 1B show different embodiments of a connection portion between an electrode foil and a lead terminal according to the present invention. FIG. 1A is a perspective view of a front side, FIG. 1B is a perspective view of a back side, and FIG. FIG. 3 (a) is a perspective view of the connecting portion, FIG. 3 (a) is a comparison diagram of the tensile strength of the lead terminal connecting portion between the product of the present invention based on sample-1 and the conventional product, and FIG. 3 (b) is the present invention based on sample-2. It is a comparison figure of the tensile strength of the drawer terminal connection part in a product and the conventional product. 1: Aluminum electrode 2: Lead-out terminal 3, 4: Folded piece at lead lead-out end
───────────────────────────────────────────────────── フロントページの続き 審査官 大澤 孝次 (56)参考文献 特開 平１−268111（ＪＰ，Ａ) 実開 昭59−145024（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) H01G 9/008────────────────────────────────────────────────── ─── Continuing from the front page Examiner Koji Osawa (56) References JP-A-1-268111 (JP, A) JP-A-59-145024 (JP, U) (58) Fields investigated (Int. Cl.6) , DB name) H01G 9/008
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33944689AJP2960088B2 (en) | 1989-12-26 | 1989-12-26 | Solid electrolytic capacitors |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33944689AJP2960088B2 (en) | 1989-12-26 | 1989-12-26 | Solid electrolytic capacitors |
| Publication Number | Publication Date |
|---|---|
| JPH03196607A JPH03196607A (en) | 1991-08-28 |
| JP2960088B2true JP2960088B2 (en) | 1999-10-06 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33944689AExpired - Fee RelatedJP2960088B2 (en) | 1989-12-26 | 1989-12-26 | Solid electrolytic capacitors |
| Country | Link |
|---|---|
| JP (1) | JP2960088B2 (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7483259B2 (en)* | 2007-03-21 | 2009-01-27 | Avx Corporation | Solid electrolytic capacitor containing a barrier layer |
| Publication number | Publication date |
|---|---|
| JPH03196607A (en) | 1991-08-28 |
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