JP5689567B2 - 導電性高分子の製造方法および固体電解コンデンサの製造方法 - Google Patents
導電性高分子の製造方法および固体電解コンデンサの製造方法 Download PDFInfo
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- JP5689567B2 JP5689567B2 JP2014526774A JP2014526774A JP5689567B2 JP 5689567 B2 JP5689567 B2 JP 5689567B2 JP 2014526774 A JP2014526774 A JP 2014526774A JP 2014526774 A JP2014526774 A JP 2014526774A JP 5689567 B2 JP5689567 B2 JP 5689567B2
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- VPCCKEJZODGJBT-UHFFFAOYSA-K iron(3+) phenylmethanesulfonate Chemical compound [Fe+3].[O-]S(=O)(=O)Cc1ccccc1.[O-]S(=O)(=O)Cc1ccccc1.[O-]S(=O)(=O)Cc1ccccc1 VPCCKEJZODGJBT-UHFFFAOYSA-K 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229940098779 methanesulfonic acid Drugs 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical group C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- KVBGVZZKJNLNJU-UHFFFAOYSA-N naphthalene-2-sulfonic acid Chemical compound C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 KVBGVZZKJNLNJU-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel 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
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000011356 non-aqueous organic solvent Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- AVFBYUADVDVJQL-UHFFFAOYSA-N phosphoric acid;trioxotungsten;hydrate Chemical compound O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.OP(O)(O)=O AVFBYUADVDVJQL-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011970 polystyrene sulfonate Substances 0.000 description 1
- 229960002796 polystyrene sulfonate Drugs 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- AVBCFBRGFCGJKX-UHFFFAOYSA-N thieno[3,4-d][1,3]dioxole Chemical compound S1C=C2OCOC2=C1 AVBCFBRGFCGJKX-UHFFFAOYSA-N 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- 229960002622 triacetin Drugs 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- JLGLQAWTXXGVEM-UHFFFAOYSA-N triethylene glycol monomethyl ether Chemical compound COCCOCCOCCO JLGLQAWTXXGVEM-UHFFFAOYSA-N 0.000 description 1
- YFNKIDBQEZZDLK-UHFFFAOYSA-N triglyme Chemical compound COCCOCCOCCOC YFNKIDBQEZZDLK-UHFFFAOYSA-N 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Description
本発明の目的は、ESL(等価直列インダクタンス)が低い固体電解コンデンサを得るための製造方法を提供することである。
[1]導電性高分子に成り得る重合性材料を含有するゾルの中において、前記重合性材料を電解重合することを含む導電性高分子の製造方法。
[2]重合性材料が、チオフェン骨格を有する化合物およびピロール骨格を有する化合物からなる群から選ばれる少なくとも一つである[1]に記載の導電性高分子の製造方法。
[3]ゾルに含まれる重合性材料の量が2〜7g/Lである[1]または[2]に記載の導電性高分子の製造方法。
[4]ゾルは、導電性高分子に成り得る重合性材料を水溶性有機溶媒に溶解させて溶液を得、該溶液をホモジナイズド処理しながら水に添加することによって得られるものである、[1]〜[3]のいずれかひとつに記載の導電性高分子の製造方法。
[5]ゾルを構成する分散質は、体積基準累積粒度分布における50%径が0.5〜1000nmである[1]〜[4]のいずれかひとつに記載の導電性高分子の製造方法。
[6]ゾルはドーパントをさらに含有する、[1]〜[5]のいずれかひとつに記載の導電性高分子の製造方法。
[7]誘電体層を表面に有する陽極体の存在下に、[1]〜[6]のいずれかひとつに記載の製造方法を行うことによって、陽極体の表面に在る誘電体層の上に導電性高分子層を形成することを含む固体電解コンデンサの製造方法。
[8]電解重合が、陽極体を陽極に、ゾル中に設けた対電極を陰極にして行なわれる[7]に記載の固体電解コンデンサの製造方法。
[9]誘電体層を表面に有する陽極体を導電性高分子に成り得る重合性材料の水溶性有機溶媒溶液に浸漬し、引き上げて、次いで前記重合性材料を含有するゾルに浸漬することをさらに含む[7]または[8]に記載の固体電解コンデンサの製造方法。
[10]導電性高分子に成り得る重合性材料、水、および水溶性有機溶媒を含有するゾルからなる導電性高分子製造用電解重合液。
[11]ゾルはさらにドーパントを含有する[10]に記載の導電性高分子製造用電解重合液。
溶液/水の質量比は、好ましくは2/8〜6/4、より好ましくは3/7〜5/5である。
(容量)
LCR測定器に配線された導線をコンデンサ素子の導電体層とコンデンサ素子に植立したリード線に当てた。120Hzにおける容量を、アジレント社製LCR測定器で測定した。
コンデンサ素子に室温下で2.5Vを印加した。電圧印加開始から30秒経過時に電源のプラス端子からコンデンサ素子のリード線、コンデンサ素子の導電体層、さらに電源のマイナス端子に亘る回路の電流値(漏れ電流)を測定した。
LCR測定器に配線された導線をコンデンサ素子の導電体層とコンデンサ素子に植立したリード線に当てた。500kHzにおけるESLを、アジレント社製LCR測定器で測定した。
〔電解重合液の調製〕
エチレングリコール250質量部に、3,4−エチレンジオキシチオフェン3.7質量部を溶解させて、溶液を得た。この溶液をホモジナイザー(マイクロテック・ニチオン社製NS−51)でホモジナイズド処理しながら水525質量部に添加した。次いで、アントラキノンスルホン酸ドーパント7.5質量部をホモジナイズド処理しながら添加した。このようにして得たゾルは均質で透明であった。このゾルを電解重合液としてステンレス製容器に入れた。
この焼結体を2質量%の燐酸水溶液に浸し、80℃、8Vで300分間電解酸化して、焼結体表面を誘電体層に化成した。なお、焼結体は全体が液中に没し且つワッシャーの上部が液に接するように浸漬した。
その後、前記焼結体を20質量%の3,4−エチレンジオキシチオフェンモノマーのエタノール溶液に浸漬した。該焼結体を該エタノール溶液から引き上げて室温にて乾燥させた。
次いで、前記電解重合液に、焼結体全体が液中に没し且つワッシャーの下部が液に接するように、焼結体を浸漬した。リード線を陽極に、ステンレス製容器を陰極にして、室温下で電流を、先ず40μAで15分間、次いで80μAで45分間、最後に120μAで10分間流して電解重合を行った。焼結体を電解重合液から引き上げて、洗浄し、乾燥させた(第1回目)。この浸漬−電解重合−洗浄−乾燥の操作をさらに1回行った(第2回目)。
電流のパターンを、80μAで30分間、次いで120μAで30分間に変えた以外は、上記と同じ手法で浸漬−電解重合−洗浄−乾燥の操作を2回行った(第3回目と第4回目)。
電流のパターンを、120μAで30分間、次いで140μAで40分間に変えた以外は、上記と同じ手法で浸漬−電解重合−洗浄−乾燥の操作を2回行った(第5回目と第6回目)。
次いで、電流のパターンを、80μAで15分間、次いで60μAで50分間、最後に40μAで30分間に変えた以外は、上記と同じ手法で浸漬−電解重合−洗浄−乾燥の操作を1回行った(第7回目)。
このようにして焼結体の表面に在る誘電体層の上に導電性高分子を形成させた。
その後、導電性高分子が誘電体層上に形成された焼結体を2質量%の燐酸水溶液に浸し、80℃、5Vで20分間電解酸化した。
別途用意した、厚さ100μmのリードフレーム(下地に厚さ0.6μmのニッケルがメッキされ、且つ最表面に厚さ5μmの錫がメッキされた銅合金製)の陰極部に、コンデンサ素子2個を1.5mm×4.5mm面をフレームに接するように並列に方向を揃えて載置し、銀ペーストで接続すると共に、所定寸法に切断したリード線部をリードフレームの陽極部に溶接で接続した。リードフレームの一部を残してコンデンサ素子を樹脂で封入し、樹脂封止体側面からはみ出たリードフレームを所定位置で切断し、樹脂封止体に沿って2回折り曲げ加工をすることにより、樹脂封止体の下面にフレーム先端を有する、大きさ7.3mm×4.3mm×1.8mm、定格2.5Vのチップ状固体電解コンデンサ320個を得た。LCが0.1CVμA以下のコンデンサの歩留まりは90%以上であった。得られたコンデンサの性能を表1に示す。なお、表1の数値は、作製した320個のコンデンサのうち、漏れ電流(LC)が0.1CVμA以下のコンデンサの平均値である。容量は120Hz、ESLは500kHzにて測定した値である。測定はアジレント社製LCRメーターを用いて行った。
エチレングリコール250質量部、水525質量部、およびアントラキノンスルホン酸ドーパント7.5質量部を混ぜ合わせて混合溶媒を得た。これに、3,4−エチレンジオキシチオフェン3.7質量部を添加して、ホモジナイザー(マイクロテック・ニチオン社製NS−51)でホモジナイズド処理した。3,4−エチレンジオキシチオフェンは全てが溶け切れず、二層分離した液が得られた。これを電解重合液とした以外は実施例1と同じ手法で固体電解コンデンサを得た。LCが0.1CVμA以下のコンデンサの歩留まりは90%以上であった。得られたコンデンサの性能を表1に示す。
エチレングリコール250質量部をプロピレングリコール388.5質量部に、3,4−エチレンジオキシチオフェンの量を4.5質量部に、水の量を375質量部に、アントラキノンスルホン酸ドーパントの量を9.2質量部に変えた以外は、実施例1と同じ手法で固体電解コンデンサを得た。電解重合液は均質で透明なゾルであった。LCが0.1CVμA以下のコンデンサの歩留まりは90%以上であった。得られたコンデンサの性能を表1に示す。
エチレングリコール250質量部をプロピレングリコール388.5質量部に、3,4−エチレンジオキシチオフェンの量を4.5質量部に、水の量を375質量部に、アントラキノンスルホン酸ドーパントの量を9.2質量部に変えた以外は、比較例1と同じ手法で固体電解コンデンサを得た。電解重合液は二層分離した液であった。LCが0.1CVμA以下のコンデンサの歩留まりは90%以上であった。得られたコンデンサの性能を表1に示す。
3,4−エチレンジオキシチオフェン3.7質量部をピロール3.3質量部に、アントラキノンスルホン酸ドーパントの量を7.0質量部に変えた以外は実施例1と同じ手法で固体電解コンデンサを得た。電解重合液は均質で透明なゾルであった。LCが0.1CVμA以下のコンデンサの歩留まりは90%以上であった。得られたコンデンサの性能を表1に示す。
3,4−エチレンジオキシチオフェン3.7質量部をピロール3.3質量部に、アントラキノンスルホン酸ドーパントの量を7.0質量部に変えた以外は比較例1と同じ手法で固体電解コンデンサを得た。電解重合液は二層分離した液であった。LCが0.1CVμA以下のコンデンサの歩留まりは90%以上であった。得られたコンデンサの性能を表1に示す。
Claims (11)
- 導電性高分子に成り得る重合性材料を含有するゾルの中において、前記重合性材料を電解重合することを含み、
前記ゾルが、導電性高分子に成り得る重合性材料を水溶性有機溶媒に溶解させて溶液を得、該溶液をホモジナイズド処理しながら水に添加することによって得られるものである、
導電性高分子の製造方法。 - 重合性材料が、チオフェン骨格を有する化合物およびピロール骨格を有する化合物からなる群から選ばれる少なくとも一つである請求項1に記載の導電性高分子の製造方法。
- ゾルに含まれる重合性材料の量が2〜7g/Lである請求項1または2に記載の導電性高分子の製造方法。
- ゾルを構成する分散質は、体積基準累積粒度分布における50%径が0.5〜1000nmである、請求項1〜3のいずれかひとつに記載の導電性高分子の製造方法。
- ゾルはドーパントをさらに含有する、請求項1〜4のいずれかひとつに記載の導電性高分子の製造方法。
- 誘電体層を表面に有する陽極体の存在下に、請求項1〜5のいずれかひとつに記載の製造方法を行うことによって、陽極体の表面に在る誘電体層の上に導電性高分子層を形成することを含む固体電解コンデンサの製造方法。
- 電解重合が、陽極体を陽極に、ゾル中に設けた対電極を陰極にして行なわれる請求項6に記載の固体電解コンデンサの製造方法。
- 誘電体層を表面に有する陽極体を導電性高分子に成り得る重合性材料の水溶性有機溶媒溶液に浸漬し、引き上げて、次いで導電性高分子に成り得る重合性材料を含有するゾルに浸漬すること、および
前記陽極体の存在下に、導電性高分子に成り得る重合性材料を含有するゾルの中において、前記重合性材料を電解重合することによって、陽極体の表面に在る誘電体層の上に導電性高分子層を形成すること、
を含む
固体電解コンデンサの製造方法。 - 電解重合が、陽極体を陽極に、ゾル中に設けた対電極を陰極にして行なわれる請求項8に記載の固体電解コンデンサの製造方法。
- 導電性高分子に成り得る重合性材料、水、および水溶性有機溶媒を含有するゾルからなり、
前記ゾルが、導電性高分子に成り得る重合性材料を水溶性有機溶媒に溶解させて溶液を得、該溶液をホモジナイズド処理しながら水に添加することによって得られるものである、
導電性高分子製造用電解重合液。 - ゾルはさらにドーパントを含有する請求項10に記載の導電性高分子製造用電解重合液。
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JPH05175081A (ja) * | 1991-12-20 | 1993-07-13 | Asahi Glass Co Ltd | 固体電解コンデンサおよびその製造方法 |
JP2000353641A (ja) * | 1999-06-14 | 2000-12-19 | Nec Corp | 固体電子素子の製造方法 |
JP2003100561A (ja) * | 2001-07-16 | 2003-04-04 | Matsushita Electric Ind Co Ltd | 固体電解コンデンサの製造方法 |
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JP2000353641A (ja) * | 1999-06-14 | 2000-12-19 | Nec Corp | 固体電子素子の製造方法 |
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