JP2950670B2 - Solid electrolytic capacitors - Google Patents
Solid electrolytic capacitorsInfo
- Publication number
- JP2950670B2 JP2950670B2 JP35094591A JP35094591A JP2950670B2 JP 2950670 B2 JP2950670 B2 JP 2950670B2 JP 35094591 A JP35094591 A JP 35094591A JP 35094591 A JP35094591 A JP 35094591A JP 2950670 B2 JP2950670 B2 JP 2950670B2
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- conductive layer
- silver powder
- anode
- 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
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、陰極導電層構成を改良
した導電性高分子膜を固体電解質として用いた固体電解
コンデンサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid electrolytic capacitor using a conductive polymer film having an improved cathode conductive layer structure as a solid electrolyte.
【０００２】[0002]
【従来の技術】近年、小形高性能化の要請に応えた導電
性高分子膜を固体電解質として用いた固体電解コンデン
サとして、特開昭６３−１７３３１３号公報に開示され
たものがある。2. Description of the Related Art In recent years, Japanese Patent Application Laid-Open No. 63-173313 discloses a solid electrolytic capacitor using a conductive polymer film as a solid electrolyte in response to a demand for miniaturization and high performance.
【０００３】これら公報に開示された技術は、表面を粗
面化した弁作用金属を化成し酸化皮膜を形成して得た陽
極体に陽極線を取着し、しかる後、酸化剤を用いて化学
酸化重合を行い、前記陽極体上に導電性高分子膜として
の化学重合膜を形成し、この化学重合膜上に、電解酸化
重合手段を講じて導電性高分子膜としての電解重合膜を
形成し、更に、この上に銀ペーストからなる陰極導電層
を形成し、この陰極導電層に陰極端子を、前記陽極線に
陽極端子をそれぞれ接続し、次に外装を施してなるもの
である。[0003] In the technology disclosed in these publications, an anode wire is attached to an anode body obtained by forming an oxide film by forming a valve action metal having a roughened surface, and then using an oxidizing agent. Chemical oxidative polymerization is performed to form a chemical polymer film as a conductive polymer film on the anode body, and an electrolytic polymer film as a conductive polymer film is formed on the chemical polymer film by means of electrolytic oxidation polymerization. Then, a cathode conductive layer made of a silver paste is formed thereon, and a cathode terminal is connected to the cathode conductive layer, an anode terminal is connected to the anode wire, and then an exterior is applied.
【０００４】しかして、このような技術によれば、比抵
抗が１０-2Ωｃｍと極めて低い導電性高分子膜を、酸化
皮膜を損傷することなく効率的に形成できるために、静
電容量が大きく、かつ高周波領域のインピーダンスが低
いなど電気的特性の優れた固体電解コンデンサを得るこ
とができる。However, according to such a technique, a conductive polymer film having a very low specific resistance of 10 −2 Ωcm can be efficiently formed without damaging the oxide film. It is possible to obtain a solid electrolytic capacitor that is large and has excellent electrical characteristics such as low impedance in a high frequency region.
【０００５】しかしながら、導電性高分子膜は、水分及
び酸素存在下における比抵抗の劣化が著しく、特に高温
中では微量の水分及び酸素により比抵抗が増加するた
め、ＥＳＲやインピーダンスの増加が見られ、また、微
量の水分の侵入により、酸化皮膜と導電性高分子膜間の
剥離が進行することによって静電容量の減少，ｔａｎδ
の増加が起こり、更には、導電性高分子膜に皮膜修復性
がないために、侵入した水分による酸化皮膜の腐食が起
こり、漏れ電流不良、更にはショート不良が見られるな
ど高温高湿下における寿命特性が問題となっていた。However, the resistivity of a conductive polymer film is remarkably deteriorated in the presence of moisture and oxygen. Particularly, at a high temperature, a small amount of moisture and oxygen causes the resistivity to increase, so that the ESR and impedance are increased. Further, the separation of the oxide film and the conductive polymer film progresses due to the penetration of a small amount of moisture, thereby decreasing the capacitance and increasing the tan δ.
In addition, since the conductive polymer film does not have film repairability, corrosion of the oxide film due to invading moisture occurs, leakage current failure, and short-circuit failure are observed. Life characteristics have been a problem.
【０００６】また、導電性高分子膜の比抵抗が１０-2Ω
ｃｍと極めて低いにもかかわらず、銀ペーストとの界面
における接触抵抗や陰極端子との接続部と掛け離れた部
分の陰極導電層の陰極端子接続部までの抵抗により、導
電性高分子膜の特性から本来得られるＥＳＲ，インピー
ダンス等の優れた高周波特性を悪化させる問題を抱えて
いた。The specific resistance of the conductive polymer film is 10 -2 Ω.
Despite the extremely low resistance of the conductive polymer film due to the contact resistance at the interface with the silver paste and the resistance to the cathode terminal connection part of the cathode conductive layer far away from the connection with the cathode terminal, despite being extremely low as cm. There is a problem that the originally obtained high frequency characteristics such as ESR and impedance are deteriorated.
【０００７】[0007]
【発明が解決しようとする課題】以上のように、導電性
高分子膜を固体電解質として用いる固体電解コンデンサ
は、小形高性能化の要請に応えたものとして注目に値す
るが、高温高湿下における寿命特性が問題となると同時
に、導電性高分子膜を用いることによって本来得られる
はずの優れた高周波特性を十分に発揮することができな
かった。As described above, a solid electrolytic capacitor using a conductive polymer film as a solid electrolyte is worthy of attention as meeting the demand for miniaturization and high performance. At the same time, the life characteristics become a problem, and the use of the conductive polymer film cannot sufficiently exhibit the excellent high-frequency characteristics that should be obtained originally.
【０００８】本発明は、上記のような従来技術の課題を
解決するために提案されたものであり、その目的は、導
電性高分子膜に対する水分及び酸素を効果的に遮断し、
かつ導電性高分子膜と陰極端子の接続部分までの経路抵
抗の小さい陰極導電層構成を有する固体電解コンデンサ
を提供することである。The present invention has been proposed to solve the above-mentioned problems of the prior art, and its object is to effectively block moisture and oxygen from a conductive polymer film,
Another object of the present invention is to provide a solid electrolytic capacitor having a configuration of a cathode conductive layer having a small path resistance to a connection portion between a conductive polymer film and a cathode terminal.
【０００９】[0009]
【課題を解決するための手段】本発明による固体電解コ
ンデンサは、陽極リード線を取着した皮膜形成性金属表
面に形成した誘電体酸化皮膜と、この酸化皮膜上に形成
した化学重合膜と、この化学重合膜上に形成した電解重
合膜と、この電解重合膜上に形成した銀ペースト層から
なる陰極導電層と、この陰極導電層に導電性接着剤を介
して接続した陰極端子と、前記陽極リード線に接続した
陽極端子と、少なくとも前記陰極端子の前記陰極導電層
との接続部及び陽極リード線と陽極端子の接続部を含む
前記コンデンサ素子全体を被覆した外装樹脂層とを具備
した固体電解コンデンサにおいて、前記陰極導電層がフ
レーク状銀粉末及び球状銀粉末の混合銀粉末と有機高分
子との結合体からなることを特徴とするものである。According to the present invention, there is provided a solid electrolytic capacitor comprising: a dielectric oxide film formed on a film-forming metal surface to which an anode lead is attached; a chemically polymerized film formed on the oxide film; An electrolytic polymer film formed on the chemical polymer film, a cathode conductive layer made of a silver paste layer formed on the electrolytic polymer film, and a cathode terminal connected to the cathode conductive layer via a conductive adhesive; A solid comprising: an anode terminal connected to an anode lead; and an exterior resin layer covering the entire capacitor element including at least a connection between the cathode terminal and the cathode conductive layer and a connection between the anode lead and the anode terminal. In the electrolytic capacitor, the cathode conductive layer is made of a combination of a mixed silver powder of a flake silver powder and a spherical silver powder and an organic polymer.
【００１０】また、陰極導電層がフレーク状銀粉末及び
球状銀粉末の混合銀粉末と有機高分子との結合体からな
り、導電性接着剤がフレーク状銀粉末及び球状銀粉末の
混合銀粉末と有機高分子との結合体からなることを特徴
とする。[0010] The cathode conductive layer comprises a combination of a mixed silver powder of flake silver powder and spherical silver powder and an organic polymer, and the conductive adhesive comprises a mixed silver powder of flake silver powder and spherical silver powder. It is characterized by comprising a conjugate with an organic polymer.
【００１１】[0011]
【作用】以上のような構成を有する本発明の固体電解コ
ンデンサによれば、陰極導電層を構成する球状銀粉末が
フレーク状銀粉末同士間を埋めることになり、外装を透
過してきた水分及び酸素を効果的に遮断でき、導電性高
分子膜の特性劣化を防ぐことが可能となると同時に、球
状銀粉末の存在により導電性高分子膜との接触がよくな
る。According to the solid electrolytic capacitor of the present invention having the above-described structure, the spherical silver powder constituting the cathode conductive layer fills the space between the flake-like silver powders, so that the moisture and oxygen permeating through the outer package can be obtained. Of the conductive polymer film can be effectively blocked, and the deterioration of the characteristics of the conductive polymer film can be prevented. At the same time, the presence of the spherical silver powder improves the contact with the conductive polymer film.
【００１２】また、球状銀粉末の存在によって陰極導電
層の縦方向の抵抗値を、フレーク状銀粉末の存在によっ
て陰極導電層の横方向の抵抗値をそれぞれ下げることが
可能となり、陰極導電層全体の陰極端子接続部までの経
路抵抗を下げることができる。Further, the presence of the spherical silver powder makes it possible to reduce the longitudinal resistance value of the cathode conductive layer, and the presence of the flake silver powder makes it possible to reduce the lateral resistance value of the cathode conductive layer. , The path resistance to the cathode terminal connection can be reduced.
【００１３】[0013]
【実施例】以下に、本発明の一実施例について説明す
る。An embodiment of the present invention will be described below.
【００１４】すなわち、図１に示すように、電気化学的
なエッチングによって表面積を拡大し、化成工程を経て
表面に酸化皮膜１を形成した、例えばアルミニウム箔か
らなる３ｍｍ×３ｍｍの陽極体２に陽極リード線３を取
着し、この陽極体２を２ｍｏｌ／リットル ピロール／
エタノール溶液に５分間浸漬した後、更に、過硫酸アン
モニウム０．２ｍｏｌ／リットル及び支持電解質として
パラトルエンスルホン酸ナトリウム０．２ｍｏｌ／リッ
トルを含む水溶液に５分間浸漬して、化学酸化重合によ
り前記酸化皮膜上に導電性高分子膜としての化学重合膜
４を形成する。次に、電解液としてピロールモノマー
０．２ｍｏｌ／リットル及び支持電解質としてアルキル
ナフタレンスルホン酸ナトリウム０．０５ｍｏｌ／リッ
トルを含む水溶液中に浸漬し前記化学重合膜４を陽極と
し、外部電極との間に定電流電解酸化重合（１ｍＡ／ｃ
ｍ2 ，１ｈ）を行い、前記化学重合膜４上に導電性高分
子膜としての電解重合膜５を形成した後、コロイダルカ
ーボンに浸漬してカーボン層６を形成する。That is, as shown in FIG. 1, the surface area is enlarged by electrochemical etching, and an oxide film 1 is formed on the surface through a chemical conversion step. The lead wire 3 was attached, and the anode body 2 was attached at 2 mol / liter pyrrole /
After being immersed in an ethanol solution for 5 minutes, it was further immersed in an aqueous solution containing 0.2 mol / l of ammonium persulfate and 0.2 mol / l of sodium paratoluenesulfonate as a supporting electrolyte for 5 minutes, and then on the oxide film by chemical oxidation polymerization. Then, a chemically polymerized film 4 as a conductive polymer film is formed. Next, the film was immersed in an aqueous solution containing 0.2 mol / l of a pyrrole monomer as an electrolytic solution and 0.05 mol / l of sodium alkylnaphthalenesulfonate as a supporting electrolyte, and the chemical polymerized film 4 was used as an anode, and the space between the film and the external electrode was fixed. Current electrolytic oxidation polymerization (1 mA / c
m 2 , 1h) to form an electrolytic polymer film 5 as a conductive polymer film on the chemical polymer film 4, and then dipped in colloidal carbon to form a carbon layer 6.
【００１５】しかして、このカーボン層６の上に粒径５
μｍのフレーク状銀粉末と粒径０．５μｍの球状銀粉末
の重量比が１：１の混合粉末とエポキシ樹脂とブチルセ
ルソルブの重量比を８：２：５とした銀ペーストを塗布
し、１６０℃、１時間で乾燥して陰極導電層７を形成し
コンデンサ素子８を構成する。On the carbon layer 6, a particle size of 5
A 1: 1 mixed powder of a flake silver powder having a particle size of 0.5 μm and a spherical silver powder having a particle size of 0.5 μm, and a silver paste having a weight ratio of an epoxy resin and a butyl cellosolve of 8: 2: 5 are applied. After drying at 160 ° C. for one hour, the cathode conductive layer 7 is formed to form the capacitor element 8.
【００１６】次に、このコンデンサ素子８の陰極導電層
７の一部に陰極端子９を導電性銀接着剤１０にて接続
し、前記陽極リード線１に陽極端子１１を溶接によって
接続した後、少なくとも前記陰極端子９の前記陰極導電
層７との接続部及び陽極リード線１と陽極端子１１の接
続部を含む前記コンデンサ素子８全体を外装樹脂層１２
にて被覆しコンデンサ本体１３を形成し、このコンデン
サ本体１３側面から導出した前記陽極端子１１及び陰極
端子９をコンデンサ本体１３の側面に沿ってコンデンサ
本体１３の底面まで延在するように折り曲げ加工してな
るものである。Next, a cathode terminal 9 is connected to a part of the cathode conductive layer 7 of the capacitor element 8 with a conductive silver adhesive 10, and an anode terminal 11 is connected to the anode lead wire 1 by welding. The entire capacitor element 8 including at least the connecting portion of the cathode terminal 9 with the cathode conductive layer 7 and the connecting portion of the anode lead 1 and the anode terminal 11 is covered with the exterior resin layer 12.
Then, the anode terminal 11 and the cathode terminal 9 derived from the side surface of the capacitor body 13 are bent so as to extend along the side surface of the capacitor body 13 to the bottom surface of the capacitor body 13. It is.
【００１７】以上のような構成になる固体電解コンデン
サによれば、陰極導電層７がフレーク状銀粉末と球状銀
粉末の混合粉末とエポキシ樹脂との結合体で構成されて
いるため、球状銀粉末がフレーク状銀粉末同士間を埋め
ることになり、外装樹脂層１２を透過してきた水分及び
酸素を効果的に遮断することにより、導電性高分子膜と
しての化学重合膜４及び電解重合膜５の特性劣化を防ぐ
ことができ、高温高湿下におけるコンデンサの寿命特性
を著しく改善することができる。According to the solid electrolytic capacitor having the above-described structure, the cathode conductive layer 7 is made of a combination of the mixed powder of the flake silver powder and the spherical silver powder and the epoxy resin. Fills the space between the flake-like silver powders and effectively blocks moisture and oxygen permeating the exterior resin layer 12, whereby the chemically polymerized film 4 and the electropolymerized film 5 as conductive polymer films are formed. Characteristic deterioration can be prevented, and the life characteristics of the capacitor under high temperature and high humidity can be significantly improved.
【００１８】また、球状粉末の存在により導電性高分子
膜との接触がよくなることと相俟って、球状銀粉末の存
在によって陰極導電層７の縦方向の抵抗値を、フレーク
状銀粉末の存在によって陰極導電層７の横方向の抵抗値
をそれぞれ下げることが可能となり、陰極導電層全体の
陰極端子接続部までの経路抵抗を下げることによりＥＳ
Ｒ及びインピーダンスの高周波特性の改善が図られる。In addition to the fact that the spherical powder improves the contact with the conductive polymer film, the presence of the spherical silver powder reduces the resistance value of the cathode conductive layer 7 in the vertical direction. The existence thereof makes it possible to lower the resistance value of the cathode conductive layer 7 in the lateral direction, and lowers the path resistance of the entire cathode conductive layer to the cathode terminal connection portion, thereby reducing the ES resistance.
The high frequency characteristics of R and impedance are improved.
【００１９】上記実施例では、フレーク状銀粉末の粒径
として５μｍ、球状銀粉末の粒径として０．５μｍの混
合銀粉末のものを用い、フレーク状銀粉末と球状銀粉末
の重量比として１：１で、かつ混合粉末とエポキシ樹脂
との重量比を８：２としたものを例示したが、これに限
定されることなく粒径０．５〜２０μｍのフレーク状銀
粉末と粒径０．１〜５μｍの球状銀粉末の混合銀粉末と
有機高分子からなり、この場合のフレーク状銀粉末と球
状銀粉末が９．５〜５．０：０．５〜５．０の範囲で適
宜設定しても同様の効果が得られる。In the above embodiment, a mixed silver powder having a particle size of the flake silver powder of 5 μm and a particle size of the spherical silver powder of 0.5 μm was used, and the weight ratio of the flake silver powder to the spherical silver powder was 1 μm. A ratio of 1: 2 and a weight ratio of the mixed powder to the epoxy resin of 8: 2 is exemplified. However, the present invention is not limited thereto, and a flake silver powder having a particle size of 0.5 to 20 μm and a particle size of 0. It is composed of a mixed silver powder of 1 to 5 μm spherical silver powder and an organic polymer, and the flake silver powder and the spherical silver powder in this case are appropriately set in the range of 9.5 to 5.0: 0.5 to 5.0. The same effect can be obtained even if the same is performed.
【００２０】このことは、上記各粉末の粒径が上記した
ものより小さい場合は寿命特性が悪く、大きい場合は寿
命特性に加えて、初期のｔａｎδ，ＥＳＲ及びインピー
ダンス特性が悪く、また、混合銀粉末と有機高分子の重
量比が上記範囲外の場合で、例えば混合銀粉末と有機高
分子の重量比が１０〜９．０：０〜１．０の場合は寿命
特性の劣化が著しく、混合銀粉末と有機高分子の重量比
が３．５〜０：６．５〜１０の場合は初期特性の劣化が
みられ、実用上好ましくない理由によるものである。This means that if the particle size of each powder is smaller than the above, the life characteristics are poor, and if the particle size is large, the initial tan δ, ESR and impedance characteristics are poor in addition to the life characteristics. When the weight ratio of the powder to the organic polymer is out of the above range, for example, when the weight ratio of the mixed silver powder to the organic polymer is 10 to 9.0: 0 to 1.0, the life characteristics are significantly deteriorated, and When the weight ratio of the silver powder to the organic polymer is 3.5 to 0: 6.5 to 10, the initial characteristics are deteriorated, which is not preferable for practical use.
【００２１】次に、本発明と比較例の特性比較について
説明する。すなわち、前記した実施例によって製作した
定格電圧１６Ｖ、公称静電容量１μＦの固体電解コンデ
ンサ（実施例）と、以下に示す比較例１によって製作し
た定格電圧１６Ｖ、公称静電容量１μＦの固体電解コン
デンサ（比較例Ａ）及び比較例２によって製作した定格
電圧１６Ｖ、公称静電容量１μＦの固体電解コンデンサ
（比較例Ｂ）それぞれの初期特性及び高温・高湿試験
（８５℃，９０％ＲＨ，１００ｈ）後の特性を調べたと
ころ表１及び表２に示すように、また、それぞれの初期
の周波数−インピーダンス特性を調べたところ図２に示
すような結果が得られた。Next, comparison of characteristics between the present invention and a comparative example will be described. That is, a solid electrolytic capacitor (Example) having a rated voltage of 16 V and a nominal capacitance of 1 μF manufactured according to the above-described embodiment, and a solid electrolytic capacitor having a rated voltage of 16 V and a nominal capacitance of 1 μF manufactured according to Comparative Example 1 described below. Initial characteristics and high-temperature / high-humidity test (85 ° C., 90% RH, 100 h) of a solid electrolytic capacitor (Comparative Example B) having a rated voltage of 16 V and a nominal capacitance of 1 μF manufactured by Comparative Example A and Comparative Example 2 When the subsequent characteristics were examined, the results as shown in Tables 1 and 2 were obtained, and when the initial frequency-impedance characteristics were examined, the results as shown in FIG. 2 were obtained.
【００２２】表１及び表２中のＥＳＲは周波数１００Ｋ
Ｈｚにおける数値であり、試料数はそれぞれ１００個で
あり、数値は平均値で、括弧内の数値はバラツキを示
す。 ［比較例Ａ］陰極導電層として、粒径５μｍのフレーク
状銀粉末とエポキシ樹脂及びブチルセルソルブの重量比
を８：２：５とした銀ペーストを塗布し形成した以外
は、前記実施例と同様の手段で製作した。 ［比較例Ｂ］陰極導電層として、粒径０．５μｍの球状
銀粉末とエポキシ樹脂及びブチルセルソルブの重量比を
８：２：５とした銀ペーストを塗布し形成した以外は、
前記実施例と同様の手段で製作した。The ESR in Tables 1 and 2 is 100K frequency.
It is a numerical value in Hz, the number of samples is 100 each, the numerical value is an average value, and the numerical value in parentheses indicates variation. [Comparative Example A] The same procedure as in the above Examples except that the cathode conductive layer was formed by applying a silver paste having a weight ratio of flake silver powder having a particle size of 5 μm, epoxy resin and butyl cellosolve of 8: 2: 5. Manufactured by similar means. Comparative Example B The cathode conductive layer was formed by applying a silver paste having a weight ratio of a spherical silver powder having a particle diameter of 0.5 μm, an epoxy resin and butylcellosolve of 8: 2: 5 to the cathode conductive layer.
It was manufactured by the same means as in the above embodiment.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【表２】 [Table 2]
【００２５】表１から明らかなように初期特性は、陰極
導電層としてフレーク状銀粉末のみを用いた比較例Ａ
が、ＥＳＲ及びｔａｎδ特性が悪く、導電性高分子膜と
陰極導電層間の接触抵抗が大きいことによるものと考え
られる。また、陰極導電層として球状銀粉末のみを用い
た比較例Ｂは、ＥＳＲが大きくなっており、陰極導電層
の横方向抵抗の影響によるものと考えられる。そして、
このことは、図２の周波数−インピーダンス特性からも
言える。As is clear from Table 1, the initial characteristics are shown in Comparative Example A using only flake silver powder as the cathode conductive layer.
However, it is considered that ESR and tan δ characteristics are poor, and the contact resistance between the conductive polymer film and the cathode conductive layer is large. In Comparative Example B using only the spherical silver powder as the cathode conductive layer, the ESR was large, which is considered to be due to the influence of the lateral resistance of the cathode conductive layer. And
This can be said from the frequency-impedance characteristics of FIG.
【００２６】また、表２から明らかなように高温・高湿
試験後の特性は、比較例Ａの場合、漏れ電流及びＥＳＲ
特性の劣化がみられ、比較例Ｂの場合、各特性の劣化が
著しく、この要因は水分及び酸素の侵入によるものと考
えられる。As is clear from Table 2, the characteristics after the high-temperature / high-humidity test show the leakage current and ESR in Comparative Example A.
The characteristics were deteriorated, and in the case of Comparative Example B, each characteristic was significantly deteriorated.
【００２７】これに対して本発明の実施例によるもの
は、いずれの特性においても初期特性は安定しており、
また高温・高湿試験後においてもその安定した諸特性を
維持し、寿命特性改善に大きく貢献できることを実証し
た。On the other hand, according to the embodiment of the present invention, the initial characteristics are stable in any of the characteristics.
It also proved that it maintained its various characteristics even after the high temperature and high humidity test, and could greatly contribute to the improvement of the life characteristics.
【００２８】なお、本発明は前記実施例に限定されるも
のではなく、例えば、陽極体としては、アルミニウム以
外のタンタル又はニオブ等の弁作用金属箔箔、或いはこ
れらアルミニウム，タンタル，ニオブ等の弁作用金属粉
末を焼結したものに用いたものにも適用できることは勿
論である。The present invention is not limited to the above embodiment. For example, the anode body may be a valve metal foil such as tantalum or niobium other than aluminum or a valve metal foil such as aluminum, tantalum or niobium. It is needless to say that the present invention can also be applied to a sintered metal working powder.
【００２９】また、本発明の実施例において、導電性高
分子としてピロールを例示して説明したが、チオフェ
ン，フラン又はアニリンを用いたものにおいても同効で
ある。Further, in the embodiments of the present invention, pyrrole was described as an example of the conductive polymer, but the same effect can be obtained in the case where thiophene, furan or aniline is used.
【００３０】更に、上記実施例では、陰極導電層と陰極
端子との接続手段として、導電性銀接着剤を用いるもの
を例示して説明したが、フレーク状銀粉末及び球状銀粉
末の混合銀粉末と有機高分子との結合体からなる導電性
接着剤を用いれば、陰極導電層と陰極端子との接続状態
がよくなり、ＥＳＲ特性を向上する上で有効である。Further, in the above-described embodiment, an example in which a conductive silver adhesive is used as the connection means between the cathode conductive layer and the cathode terminal has been described. However, a mixed silver powder of flake silver powder and spherical silver powder is used. The use of a conductive adhesive made of a combination of a polymer and an organic polymer improves the connection between the cathode conductive layer and the cathode terminal, and is effective in improving ESR characteristics.
【００３１】[0031]
【発明の効果】以上述べたように本発明によれば、初期
特性が優れており、かつ高温・高湿下における諸特性劣
化のない実用的価値の高い導電性高分子膜を固体電解質
として用いた固体電解コンデンサを得ることができる。As described above, according to the present invention, a conductive polymer film having excellent initial characteristics and high practical value without deterioration of various characteristics under high temperature and high humidity is used as a solid electrolyte. A solid electrolytic capacitor can be obtained.
【図１】本発明の一実施例によって得られた固体電解コ
ンデンサを示す正断面図。FIG. 1 is a front sectional view showing a solid electrolytic capacitor obtained by one embodiment of the present invention.
【図２】周波数−インピーダンス特性曲線図。FIG. 2 is a frequency-impedance characteristic curve diagram.
１ 酸化皮膜 ２ 陽極体 ３ 陽極リード線 ４ 化学重合膜 ５ 電解重合膜 ６ カーボン層 ７ 陰極導電層 ８ コンデンサ素子 ９ 陰極端子 １０ 導電性銀接着剤 １１ 陽極端子 １２ 外装樹脂層 １３ コンデンサ本体 DESCRIPTION OF SYMBOLS 1 Oxide film 2 Anode body 3 Anode lead wire 4 Chemical polymerization film 5 Electropolymerization film 6 Carbon layer 7 Cathode conductive layer 8 Capacitor element 9 Cathode terminal 10 Conductive silver adhesive 11 Anode terminal 12 Exterior resin layer 13 Capacitor body
Claims (2)
表面に形成した誘電体酸化皮膜と、この酸化皮膜上に形
成した化学重合膜と、この化学重合膜上に形成した電解
重合膜と、この電解重合膜上に形成した銀ペースト層か
らなる陰極導電層と、この陰極導電層に導電性接着剤を
介して接続した陰極端子と、前記陽極リード線に接続し
た陽極端子と、少なくとも前記陰極端子の前記陰極導電
層との接続部及び陽極リード線と陽極端子の接続部を含
む前記コンデンサ素子全体を被覆した外装樹脂層とを具
備した固体電解コンデンサにおいて、前記陰極導電層が
フレーク状銀粉末及び球状銀粉末の混合銀粉末と有機高
分子との結合体からなることを特徴とする固体電解コン
デンサ。1. A dielectric oxide film formed on a surface of a film-forming metal to which an anode lead wire is attached, a chemically polymerized film formed on the oxide film, and an electrolytic polymerized film formed on the chemical polymerized film. A cathode conductive layer composed of a silver paste layer formed on the electrolytic polymerized film, a cathode terminal connected to the cathode conductive layer via a conductive adhesive, an anode terminal connected to the anode lead wire, and at least the A solid electrolytic capacitor comprising: a connection portion of a cathode terminal with the cathode conductive layer; and an exterior resin layer covering the entire capacitor element including an anode lead wire and a connection portion of the anode terminal. A solid electrolytic capacitor comprising a combination of a mixed silver powder of a powder and a spherical silver powder with an organic polymer.
表面に形成した誘電体酸化皮膜と、この酸化皮膜上に形
成した化学重合膜と、この化学重合膜上に形成した電解
重合膜と、この電解重合膜上に形成した銀ペースト層か
らなる陰極導電層と、この陰極導電層に導電性接着剤を
介して接続した陰極端子と、前記陽極リード線に接続し
た陽極端子と、少なくとも前記陰極端子の前記陰極導電
層との接続部及び陽極リード線と陽極端子の接続部を含
む前記コンデンサ素子全体を被覆した外装樹脂層とを具
備した固体電解コンデンサにおいて、前記陰極導電層が
フレーク状銀粉末及び球状銀粉末の混合銀粉末と有機高
分子との結合体からなり、前記導電性接着剤がフレーク
状銀粉末及び球状銀粉末の混合銀粉末と有機高分子との
結合体からなることを特徴とする固体電解コンデンサ。2. A dielectric oxide film formed on a film-forming metal surface to which an anode lead wire is attached, a chemically polymerized film formed on the oxide film, and an electrolytic polymerized film formed on the chemical polymerized film. A cathode conductive layer comprising a silver paste layer formed on the electrolytic polymerized film, a cathode terminal connected to the cathode conductive layer via a conductive adhesive, an anode terminal connected to the anode lead wire, and at least the A solid electrolytic capacitor comprising: a connecting portion of a cathode terminal with the cathode conductive layer; and an outer resin layer covering the entire capacitor element including an anode lead wire and a connecting portion of the anode terminal. The conductive adhesive is composed of a conjugate of a mixed silver powder of flake silver powder and spherical silver powder and an organic polymer; A solid electrolytic capacitor characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35094591A JP2950670B2 (en) | 1991-12-10 | 1991-12-10 | Solid electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35094591A JP2950670B2 (en) | 1991-12-10 | 1991-12-10 | Solid electrolytic capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05159987A JPH05159987A (en) | 1993-06-25 |
| JP2950670B2 true JP2950670B2 (en) | 1999-09-20 |
Family
ID=18413980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35094591A Expired - Fee Related JP2950670B2 (en) | 1991-12-10 | 1991-12-10 | Solid electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2950670B2 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4505774B2 (en) * | 1999-02-18 | 2010-07-21 | 株式会社村田製作所 | Solid electrolytic capacitor and manufacturing method thereof |
| JP4019902B2 (en) | 2002-11-13 | 2007-12-12 | 松下電器産業株式会社 | Solid electrolytic capacitor and manufacturing method thereof |
| JP4988151B2 (en) * | 2003-05-14 | 2012-08-01 | 三洋電機株式会社 | Solid electrolytic capacitor |
| JP3858902B2 (en) | 2004-03-03 | 2006-12-20 | 住友電気工業株式会社 | Conductive silver paste and method for producing the same |
| JP4655689B2 (en) * | 2004-03-09 | 2011-03-23 | 株式会社村田製作所 | Solid electrolytic capacitor and its use |
| JP4670402B2 (en) * | 2005-03-08 | 2011-04-13 | パナソニック株式会社 | Manufacturing method of solid electrolytic capacitor |
| JP4739982B2 (en) | 2005-03-28 | 2011-08-03 | 三洋電機株式会社 | Manufacturing method of solid electrolytic capacitor |
| WO2007013456A1 (en) * | 2005-07-26 | 2007-02-01 | Showa Denko K. K. | Solid electrolytic capacitor element and solid electrolytic capacitor using same |
| TW200739634A (en) * | 2005-12-28 | 2007-10-16 | Showa Denko Kk | Solid electrolyte capacitor and production method thereof |
| US8310815B2 (en) * | 2009-04-20 | 2012-11-13 | Kemet Electronics Corporation | High voltage and high efficiency polymer electrolytic capacitors |
| KR102016481B1 (en) * | 2011-11-25 | 2019-09-02 | 삼성전기주식회사 | Solid Electrolyte Capacitor and fabrication method thereof |
| JP6383183B2 (en) * | 2014-06-03 | 2018-08-29 | 太陽インキ製造株式会社 | Conductive adhesive and electronic component using the same |
| JP2018009112A (en) * | 2016-07-14 | 2018-01-18 | タツタ電線株式会社 | Conductive coating material and method for producing shield package using the same |
-
1991
- 1991-12-10 JP JP35094591A patent/JP2950670B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05159987A (en) | 1993-06-25 |
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