JPH04167414A - Solid electrolytic capacitor - Google Patents
Solid electrolytic capacitorInfo
- Publication number
- JPH04167414A JPH04167414A JP2294004A JP29400490A JPH04167414A JP H04167414 A JPH04167414 A JP H04167414A JP 2294004 A JP2294004 A JP 2294004A JP 29400490 A JP29400490 A JP 29400490A JP H04167414 A JPH04167414 A JP H04167414A
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- capacitor
- anode
- capacitor element
- lead terminal
- 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 61
- 239000007787 solid Substances 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000000853 adhesive Substances 0.000 claims abstract description 14
- 230000001070 adhesive effect Effects 0.000 claims abstract description 14
- 239000007784 solid electrolyte Substances 0.000 claims abstract description 13
- 239000011888 foil Substances 0.000 claims description 16
- 229910052709 silver Inorganic materials 0.000 claims description 8
- 239000004332 silver Substances 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229920001940 conductive polymer Polymers 0.000 claims description 5
- 238000003466 welding Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 abstract 2
- 230000002950 deficient Effects 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 7
- 229920000128 polypyrrole Polymers 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin 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 3
- 239000000178 monomer Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 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
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003115 supporting electrolyte Substances 0.000 description 1
Landscapes
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は固体電解コンデンサに関し、さらに詳しく言え
ば、電極箔を平板状としたまま使用する偏平な固体電解
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 solid electrolytic capacitor, and more specifically, to a flat solid electrolytic capacitor in which the electrode foil is used as a flat plate.
電極箔を板状としたままで用いるコンデンサ素子は、箔
巻回型や金属粉末焼結体のものに比べて、その厚みをよ
り薄くすることができる。第５図にはその偏平なコンデ
ンサ素子１が例示されている。A capacitor element using a plate-shaped electrode foil can be made thinner than a foil-wound type or a metal powder sintered body. FIG. 5 shows an example of the flat capacitor element 1.
すなわち、このコンデンサ素子１は平板状とされたアル
ミニウム箔からなる電極箔２を備えている。この電極箔
２の所定部位、通常はその端部には陽極リード３が取付
けられる。この場合、陽極リード３は平板部分３ａと、
その一端に連設された棒状のリード脚３ｂとを含み、そ
の平板部分３ａがかしめもしくは超音波溶接などにて電
極箔２に取付けられる。That is, this capacitor element 1 includes an electrode foil 2 made of a flat aluminum foil. An anode lead 3 is attached to a predetermined portion of the electrode foil 2, usually at its end. In this case, the anode lead 3 has a flat plate portion 3a,
It includes a rod-shaped lead leg 3b connected to one end thereof, and its flat plate portion 3a is attached to the electrode foil 2 by caulking, ultrasonic welding, or the like.
電極箔２の周りには導電性高分子（例えばポリピロール
）からなる固体電解質４が形成され、その上にカーボン
層５と銀層６とからなる陰極層７が形成される。図示さ
れていないが、この陰極層７に陰極リードが接着銀など
の導電性接着材にて取付けら九る。A solid electrolyte 4 made of a conductive polymer (for example, polypyrrole) is formed around the electrode foil 2, and a cathode layer 7 made of a carbon layer 5 and a silver layer 6 is formed thereon. Although not shown, a cathode lead is attached to the cathode layer 7 using a conductive adhesive such as adhesive silver.
ここで、ポリピロールを例にとって上記固体電解質３の
形成方法を説明すると、まず、陽極り一ド３が取付けら
れた状態の電極Ｍ２にピロールモノマーを均一に塗布し
たのち、所定の酸化剤を含む溶液中に浸漬して酸化重合
膜を形成する。次に。Here, to explain the method of forming the solid electrolyte 3 using polypyrrole as an example, first, a pyrrole monomer is uniformly applied to the electrode M2 with the anode electrode 3 attached, and then a solution containing a predetermined oxidizing agent is applied. to form an oxidized polymer film. next.
支持電解質とピロールモノマーを溶解した電解液中にお
いて、酸化重合膜を陽極として電解重合を行なってその
酸化重合膜上にポリピロールからなる電解重合膜を形成
する。In an electrolytic solution containing a supporting electrolyte and a pyrrole monomer, electrolytic polymerization is carried out using the oxidized polymeric membrane as an anode to form an electrolytic polymeric membrane made of polypyrrole on the oxidized polymeric membrane.
このようなコンデンサ素子１を用いることにより、薄型
の固体電解コンデンサが得られるのであるが、ｆＲ１枚
の構成でしかもその面積も限られているため、余り高い
静電容鴬が得られない。By using such a capacitor element 1, a thin solid electrolytic capacitor can be obtained, but since it is configured with one fR and its area is limited, a very high capacitance cannot be obtained.
そこで、数枚分の大きさの箔に固体電解質（ポリピロー
ルフを形成したのち、例えばジグザク状に折り畳んで、
全体として偏平なコンデンサ素子を得ようとすると、そ
の折り曲げ時にポリピロールに亀裂や剥離が生じ、主と
して漏れ電流不良が多発するという欠点がある。Therefore, after forming a solid electrolyte (polypyrolyte) on foil the size of several sheets, we folded it in, for example, a zigzag shape.
If an attempt is made to obtain a capacitor element that is flat as a whole, the problem is that cracks and peeling occur in the polypyrrole when the capacitor element is bent, resulting in frequent leakage current failures.
本発明は上記従来の事情に鑑みなされたもので、その構
成上の特徴は、平板状の電極箔の所定部位に陽極リード
を取付け、同電極箔の周りに導電性高分子からなる固体
電解質を形成するとともに、同固体電解質上にカーボン
および銀などからなる陰極層を形成してなる複数の偏平
なコンデンサ素子を有する固体電解コンデンサにおいて
、互いに平行に伸びる一対の保持板を含むほぼコ字状の
フープ材を備え、上記コンデンサ素子の複数枚を隣接の
陽極リード同士が上下方向において重ならないようにそ
の陽極リードを上記一対の保持板に交互に取付けるとと
もに、それら各コンデンサ素子の陰極層同士を導電性接
着材を介して電気的に導通させてコンデンサ素子積層体
とし、上記フープ材に外部引出し用の陽極リード端子に
取付けるとともに、上記コンデンサ素子積層体の陰極層
に導電性接着材を介して外部引出し用の陰極リード端子
を取付け、上記コンデンサ素子積層体の周りに外装部材
を設けたことにある。The present invention has been developed in view of the above-mentioned conventional circumstances, and its structural features are that an anode lead is attached to a predetermined part of a flat electrode foil, and a solid electrolyte made of a conductive polymer is placed around the electrode foil. In a solid electrolytic capacitor having a plurality of flat capacitor elements formed by forming a cathode layer made of carbon, silver, etc. on the same solid electrolyte, a substantially U-shaped capacitor including a pair of holding plates extending parallel to each other is used. A hoop material is provided, and the anode leads of the plurality of capacitor elements are attached alternately to the pair of holding plates so that adjacent anode leads do not overlap in the vertical direction, and the cathode layers of each capacitor element are electrically conductive. The capacitor element laminate is made electrically conductive via a conductive adhesive, and is attached to the anode lead terminal for external extraction to the hoop material, and the cathode layer of the capacitor element laminate is connected to the outside via a conductive adhesive. A cathode lead terminal for extraction is attached, and an exterior member is provided around the capacitor element laminate.
この場合、上記陽極リード端子と上記陰極リード端子は
、同一のリードフレームに連設されていることが好まし
い、また、外装部材は有底角筒状の外装ケースからなり
、陽極リード端子と陰極リード端子は同外装ケースの開
口部側から同一方向に引出され、所定寸法に切断された
上で、同外装ケースの側面に沿って折り曲げられる。In this case, it is preferable that the anode lead terminal and the cathode lead terminal are connected to the same lead frame, and the exterior member is a square cylindrical exterior case with a bottom, and the anode lead terminal and the cathode lead The terminals are pulled out in the same direction from the opening side of the exterior case, cut to a predetermined size, and then bent along the side surface of the exterior case.
上記の構成によれば、各コンデンサ素子の陽極リードは
フープ材に対して並列的に接続され、また陰極層同士も
導電性接着材を介して並列的に導通されるため、導電性
高分子からなる固体電解質を傷めることなく、薄型であ
りながら高容量の固体電解コンデンサが得られる。また
、コンデンサ素子を積層するにあたって、陽極リードの
部分が重ならないようにされているため、その積層厚み
を最小限に抑えることができる。According to the above configuration, the anode lead of each capacitor element is connected in parallel to the hoop material, and the cathode layers are also electrically connected in parallel through the conductive adhesive, so that the conductive polymer A thin yet high-capacity solid electrolytic capacitor can be obtained without damaging the solid electrolyte. Further, when stacking the capacitor elements, the anode lead portions are prevented from overlapping, so the stacking thickness can be minimized.
第１図には４枚の偏平なコンデンサ素子１ａ〜ｌｄを用
いた第１実施例が示されている。なお、・この実施例の
図面において１作図の都合上、各コンデンサ素子１ ａ
＝ １ ｄは電極箔に陽極リードを取付けた状態とし
て示されているが、実際には先に説明の第６！！＋のよ
うに、電極箔２の周りに例えばポリピロールからなる固
体電解ＦＲ４が形成され、さらにその上にカーボン層５
および銀層からなる陰極層７が形成されているものと理
解されたい。FIG. 1 shows a first embodiment using four flat capacitor elements 1a to ld. In addition, in the drawings of this example, each capacitor element 1 a
= 1 d is shown with the anode lead attached to the electrode foil, but in reality, the 6th! ! As shown in +, a solid electrolyte FR4 made of polypyrrole, for example, is formed around the electrode foil 2, and a carbon layer 5 is further formed on it.
It should be understood that a cathode layer 7 consisting of a silver layer and a silver layer is formed.
この実施例において、各コンデンサ素子１８〜１ｄは、
その陽極リード３のリード脚３ｂをフープ材１１に溶接
することにより積層状態に保持される。この場合、フー
プ材１１は互いに平行に延びる一対の保持板１１ａ、ｌ
ｌｂを備えたほぼコ字状の枠部材からなる。In this embodiment, each capacitor element 18-1d is
By welding the lead legs 3b of the anode lead 3 to the hoop material 11, the stacked state is maintained. In this case, the hoop material 11 is formed by a pair of holding plates 11a and 11a extending parallel to each other.
It consists of a substantially U-shaped frame member with lb.
各コンデンサ素子１８〜１ｄは、それらの陽極リード３
が上下方向に重ならないように、一方の保持板１１ａと
他方の保持板１１ｂとに交互に取付けられる。ここで、
各コンデンサ素子１ａ〜１ｄには、それらの陽極リード
３が電極箔２の端部にそれぞれ取付けられているとして
説明すると、この実施例では奇数段目のコンデンサ素子
１ａ。Each capacitor element 18-1d has its anode lead 3
are attached alternately to one retaining plate 11a and the other retaining plate 11b so that they do not overlap in the vertical direction. here,
To explain that each of the capacitor elements 1a to 1d has its anode lead 3 attached to the end of the electrode foil 2, the capacitor element 1a in an odd-numbered stage in this embodiment.
１ｃの各リード脚３ｂを一方の保持板１１ａに溶接し、
偶数段目のコンデンサ素子１ｂ、ｌｄの各リートｊ１３
ｂを他方の保持板１１ｂに溶接することにより、積層状
態において隣接の陽極リード３が亀ならないようにして
いる。Each lead leg 3b of 1c is welded to one retaining plate 11a,
Each REET j13 of even-numbered stage capacitor elements 1b and ld
By welding b to the other holding plate 11b, adjacent anode leads 3 are prevented from warping in the stacked state.
第２図を併せて参照すると、各コンデンサ素子１８〜１
ｄの陰極層同士は導電性接着材（例えば接着銀）１２を
介して電気的に接続され、これによりコンデンサ素子積
層体１３が形成される。Referring also to FIG. 2, each capacitor element 18 to 1
The cathode layers d are electrically connected to each other via a conductive adhesive (for example, adhesive silver) 12, thereby forming a capacitor element laminate 13.
フープ材１１には外部引出し用の陽極リード端子１４が
溶接され、また、コンデンサ素子積層体１３の陰極層、
この例では最下層のコンデンサ素子１ａの陰極層に導電
性接着材１２を介して外部引出し用の陰極リード１５が
接続される。この場合、各リード端子１４．１５は、と
もに同一のリードフレーム１６の端部においてコンデン
サ素子積層体１３をその下から支持するようにほぼＬ字
状に折り曲げられている。An anode lead terminal 14 for external extraction is welded to the hoop material 11, and a cathode layer of the capacitor element laminate 13,
In this example, a cathode lead 15 for external extraction is connected to the cathode layer of the lowermost capacitor element 1a via a conductive adhesive 12. In this case, each lead terminal 14, 15 is bent into a substantially L-shape at the end of the same lead frame 16 so as to support the capacitor element stack 13 from below.
第３図を参照すると、コンデンサ素子積層体１３はその
周りに下塗樹脂１７を塗布して硬化させたのち、樹脂製
の外装ケース１８内に収納され、例えばエポキシ樹脂な
どの封止樹脂１９にて同ケース１８内に固定される。し
かるのち、陽極リード端子１４と陰極リード端子１５が
例えば第３図−点鎖線で示す部分から切断され、それら
の各端子１４．１５が第４図に例示されているように、
外装ケース１８の側面に向けて折り曲げられ、チップ型
とされる。Referring to FIG. 3, the capacitor element laminate 13 is coated with an undercoat resin 17 around it and cured, then housed in a resin exterior case 18, and sealed with a sealing resin 19 such as epoxy resin. It is fixed inside the case 18. Thereafter, the anode lead terminal 14 and the cathode lead terminal 15 are cut, for example, from the portion shown in FIG.
It is bent toward the side surface of the outer case 18 to form a chip shape.
以上説明したように１本発明によれば、複数枚の偏平な
コンデンサ素子をフープ材と導電性接着材を介して電気
並列的に接続した状態で積層し。As explained above, according to one aspect of the present invention, a plurality of flat capacitor elements are stacked in a state where they are electrically connected in parallel via a hoop material and a conductive adhesive.
かつ、その際各コンデンサ素子の陽極リードが重ならな
いようにしたことにより、導電性高分子からなる固体電
解質に機械的ストレスを与えることなく、全体が酵型で
ありながら、不良発生率の少ない高静電容量の固体電解
コンデンサが提供される。In addition, by preventing the anode leads of each capacitor element from overlapping at this time, there is no mechanical stress on the solid electrolyte made of conductive polymer, and even though the entire structure is fermented, it is possible to achieve high efficiency with a low defect rate. A capacitive solid electrolytic capacitor is provided.
第１図ないし第４図は本発明の実施例に関するもので、
第１図はコンデンサ素子積層体と各リード端子とを分離
して示す斜視図、第２図は同コンデンサ素子積層体に各
リード端子を取付けた状態の側面図、第３図はコンデン
サ素子積層体を外装ケース内に収納した状態の断面図、
第４図は最終製品形態であるチップ型固体電解コンデン
サの外観斜視図、第５図は偏平なコンデンサ素子をその
構成要素ごとに切り欠いて示した斜視図である。
図中、１はコンデンサ素子、２は電極箔、３は陽極リー
ド、４は固体電解質、５はカーボン層。
６は銀層、７は陰極層、１１はフープ材、１２は導電性
接着材、１３はコンデンサ素子積層体。
１４は陽極リード端子、１５は陰極リード端子、１６は
リードフレーム、１７は下塗樹脂、１８は外装ケース、
１９は封止樹脂である。1 to 4 relate to embodiments of the present invention,
Figure 1 is a perspective view showing the capacitor element laminate and each lead terminal separated, Figure 2 is a side view of the same capacitor element laminate with each lead terminal attached, and Figure 3 is the capacitor element laminate. A cross-sectional view of the state in which it is stored in the outer case,
FIG. 4 is an external perspective view of a chip-type solid electrolytic capacitor in the form of a final product, and FIG. 5 is a perspective view showing a flat capacitor element cut away into its constituent elements. In the figure, 1 is a capacitor element, 2 is an electrode foil, 3 is an anode lead, 4 is a solid electrolyte, and 5 is a carbon layer. 6 is a silver layer, 7 is a cathode layer, 11 is a hoop material, 12 is a conductive adhesive, and 13 is a capacitor element laminate. 14 is an anode lead terminal, 15 is a cathode lead terminal, 16 is a lead frame, 17 is an undercoat resin, 18 is an exterior case,
19 is a sealing resin.
Claims (3)
、同電極箔の周りに導電性高分子からなる固体電解質を
形成するとともに、同固体電解質上にカーボンおよび銀
などからなる陰極層を形成してなる複数の偏平なコンデ
ンサ素子を有する固体電解コンデンサにおいて、互いに
平行に伸びる一対の保持板を含むほぼコ字状のフープ材
を備え、上記コンデンサ素子の複数枚を隣接の陽極リー
ド同士が上下方向において重ならないようにその陽極リ
ードを上記一対の保持板に交互に取付けるとともに、そ
れら各コンデンサ素子の陰極層同士を導電性接着材を介
して電気的に導通させてコンデンサ素子積層体とし、上
記フープ材に外部引出し用の陽極リード端子に取付ける
とともに、上記コンデンサ素子積層体の陰極層に導電性
接着材を介して外部引出し用の陰極リード端子を取付け
、上記コンデンサ素子積層体の周りに外装部材を設けた
ことを特徴とする固体電解コンデンサ。(1) Attach an anode lead to a predetermined portion of a flat electrode foil, form a solid electrolyte made of conductive polymer around the electrode foil, and place a cathode layer made of carbon, silver, etc. on the solid electrolyte. A solid electrolytic capacitor having a plurality of flat capacitor elements is provided with a substantially U-shaped hoop material including a pair of holding plates extending parallel to each other, and a plurality of the capacitor elements are connected to each other so that adjacent anode leads are connected to each other. The anode leads are alternately attached to the pair of holding plates so as not to overlap in the vertical direction, and the cathode layers of each capacitor element are electrically connected to each other via a conductive adhesive to form a capacitor element laminate, An anode lead terminal for external extraction is attached to the hoop material, and a cathode lead terminal for external extraction is attached to the cathode layer of the capacitor element laminate via a conductive adhesive, and an exterior is mounted around the capacitor element laminate. A solid electrolytic capacitor characterized by having a component.
一のリードフレームに連設されている請求項１に記載の
固体電解コンデンサ。(2) The solid electrolytic capacitor according to claim 1, wherein the anode lead terminal and the cathode lead terminal are connected to the same lead frame.
、上記陽極リード端子と上記陰極リード端子は、同外装
ケースの開口部側から同一方向に引出されている請求項
１に記載の固体電解コンデンサ。(3) The exterior member includes a bottomed square cylindrical exterior case, and the anode lead terminal and the cathode lead terminal are pulled out in the same direction from the opening side of the exterior case. Solid electrolytic capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2294004A JPH04167414A (en) | 1990-10-31 | 1990-10-31 | Solid electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2294004A JPH04167414A (en) | 1990-10-31 | 1990-10-31 | Solid electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04167414A true JPH04167414A (en) | 1992-06-15 |
Family
ID=17802000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2294004A Pending JPH04167414A (en) | 1990-10-31 | 1990-10-31 | Solid electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04167414A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG87822A1 (en) * | 1998-08-26 | 2002-04-16 | Matsushita Electric Ind Co Ltd | Solid electrolytic capacitor and method of manufacturing the same |
| CN110447085A (en) * | 2017-03-29 | 2019-11-12 | 松下知识产权经营株式会社 | Solid electrolytic capacitor And Manufacturing approach |
| CN117766299A (en) * | 2023-12-31 | 2024-03-26 | 肇庆绿宝石电子科技股份有限公司 | Laminated solid aluminum electrolytic capacitor |
-
1990
- 1990-10-31 JP JP2294004A patent/JPH04167414A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG87822A1 (en) * | 1998-08-26 | 2002-04-16 | Matsushita Electric Ind Co Ltd | Solid electrolytic capacitor and method of manufacturing the same |
| CN110447085A (en) * | 2017-03-29 | 2019-11-12 | 松下知识产权经营株式会社 | Solid electrolytic capacitor And Manufacturing approach |
| CN110447085B (en) * | 2017-03-29 | 2021-10-15 | 松下知识产权经营株式会社 | Solid electrolytic capacitor and method for manufacturing the same |
| CN117766299A (en) * | 2023-12-31 | 2024-03-26 | 肇庆绿宝石电子科技股份有限公司 | Laminated solid aluminum electrolytic capacitor |
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