JP4894990B2 - 酸性電気銅めっき液 - Google Patents
酸性電気銅めっき液 Download PDFInfo
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- JP4894990B2 JP4894990B2 JP2005065586A JP2005065586A JP4894990B2 JP 4894990 B2 JP4894990 B2 JP 4894990B2 JP 2005065586 A JP2005065586 A JP 2005065586A JP 2005065586 A JP2005065586 A JP 2005065586A JP 4894990 B2 JP4894990 B2 JP 4894990B2
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- Prior art keywords
- plating solution
- copper
- plating
- copper plating
- copper sulfate
- 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.)
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- 238000007747 plating Methods 0.000 title claims description 85
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims description 38
- 239000010949 copper Substances 0.000 title claims description 36
- 229910052802 copper Inorganic materials 0.000 title claims description 36
- 230000002378 acidificating effect Effects 0.000 title description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 18
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 16
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 16
- JZCCFEFSEZPSOG-UHFFFAOYSA-L copper(II) sulfate pentahydrate Chemical compound O.O.O.O.O.[Cu+2].[O-]S([O-])(=O)=O JZCCFEFSEZPSOG-UHFFFAOYSA-L 0.000 claims description 9
- 239000004065 semiconductor Substances 0.000 claims description 9
- -1 nitrogen-containing organic compound Chemical class 0.000 claims description 8
- 150000002894 organic compounds Chemical class 0.000 claims description 7
- 229920000570 polyether Polymers 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 239000000243 solution Substances 0.000 description 56
- 239000000654 additive Substances 0.000 description 18
- 241001147149 Lucina Species 0.000 description 15
- 230000000996 additive effect Effects 0.000 description 11
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 10
- 229910001431 copper ion Inorganic materials 0.000 description 10
- 239000002253 acid Substances 0.000 description 8
- 238000004070 electrodeposition Methods 0.000 description 8
- 235000012431 wafers Nutrition 0.000 description 8
- 238000009713 electroplating Methods 0.000 description 6
- 150000007524 organic acids Chemical class 0.000 description 6
- 150000007522 mineralic acids Chemical class 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 235000005985 organic acids Nutrition 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000005749 Copper compound Substances 0.000 description 3
- 150000001880 copper compounds Chemical class 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 159000000000 sodium salts Chemical class 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- LMPMFQXUJXPWSL-UHFFFAOYSA-N 3-(3-sulfopropyldisulfanyl)propane-1-sulfonic acid Chemical compound OS(=O)(=O)CCCSSCCCS(O)(=O)=O LMPMFQXUJXPWSL-UHFFFAOYSA-N 0.000 description 1
- WRBSVISDQAINGQ-UHFFFAOYSA-N 3-(dimethylcarbamothioylsulfanyl)propane-1-sulfonic acid Chemical compound CN(C)C(=S)SCCCS(O)(=O)=O WRBSVISDQAINGQ-UHFFFAOYSA-N 0.000 description 1
- OBDVFOBWBHMJDG-UHFFFAOYSA-N 3-mercapto-1-propanesulfonic acid Chemical compound OS(=O)(=O)CCCS OBDVFOBWBHMJDG-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229940116318 copper carbonate Drugs 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- GEZOTWYUIKXWOA-UHFFFAOYSA-L copper;carbonate Chemical compound [Cu+2].[O-]C([O-])=O GEZOTWYUIKXWOA-UHFFFAOYSA-L 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- PEVJCYPAFCUXEZ-UHFFFAOYSA-J dicopper;phosphonato phosphate Chemical compound [Cu+2].[Cu+2].[O-]P([O-])(=O)OP([O-])([O-])=O PEVJCYPAFCUXEZ-UHFFFAOYSA-J 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229940098779 methanesulfonic acid Drugs 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 150000003585 thioureas Chemical class 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
- Electrodes Of Semiconductors (AREA)
- Manufacturing Of Printed Wiring (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Description
松浪卓史,伊藤智子,岩本由香,大和茂;エレクトロニクス実装学術誌,4(7),p629(2001)
1.硫酸銅5水和物を50〜140g/L、硫酸を100〜220g/L、非イオン性ポリエーテル系高分子界面活性剤を0.01〜10g/L、含硫黄有機化合物を0.1〜200mg/L、及び含窒素有機化合物を0.1〜200mg/L含有し、塩化物イオン濃度が2〜15mg/Lである硫酸銅めっき液中において、凹部を有する被めっき物に対して、直流電流を通電することを特徴とする電気銅めっき方法。
2.被めっき物が、ブラインドビアホールを有するプリント配線板又は配線用の溝部を有する半導体ウェハーである上記項1に記載の電気銅めっき方法。
本発明の酸性電気銅めっき液では、塩化物イオン濃度を塩化物イオン濃度を2〜15mg/L程度、好ましくは3〜10mg/L程度の範囲内とすることが必要である。この様な濃度範囲とするためには、必要に応じて、塩酸、塩化ナトリウム等を用いてめっき液中の塩化物イオン濃度を調整すればよい。
表面に銅箔を有するプリント配線板の銅箔上に厚さ35μmのフィルム状エポキシ樹脂をラミネートし、炭酸ガスレーザーを用いてエポキシ樹脂に穴をあけて、直径65μm、深さ35μmのブラインドビアホールを形成した。この表面に厚さ1μmの無電解銅めっき皮膜を形成し、厚さ25μmのドライフィルムレジストをラミネートし、平行露光機を用いてテストパターンを形成したマスクフィルムを介して露光した後、現像してめっき用試料を作成した。
硫酸銅5水和物 200g/L
硫酸 50g/L
塩化物イオン 5mg/L
トップルチナα-M 4.5ml/L
トップルチナα-2 1ml/L
トップルチナα-3 3ml/L
*本発明めっき液2
硫酸銅5水和物 90g/L
硫酸 190g/L
塩化物イオン 5mg/L
トップルチナα-M 4.5ml/L
トップルチナα-2 1ml/L
トップルチナα-3 3ml/L
*比較浴1
硫酸銅5水和物 90g/L
硫酸 190g/L
塩化物イオン 50mg/L
トップルチナα-M 4.5ml/L
トップルチナα-2 1ml/L
トップルチナα-3 3ml/L
*比較浴2
硫酸銅5水和物 200g/L
硫酸 50g/L
塩化物イオン 50mg/L
トップルチナα-M 4.5ml/L
トップルチナα-2 1ml/L
トップルチナα-3 3ml/L
トップルチナα-M: 非イオン系ポリエーテル高分子界面活性剤含有添加剤(ポリマー成分)、奥野製薬工業(株)製
トップルチナα-2: 含硫黄有機化合物含有添加剤(ブライトナー成分)、奥野製薬工業(株)製
トップルチナα-3: 含窒素有機化合物含有添加剤(レベラー成分)、奥野製薬工業(株)製
(埋め込み性の評価方法)
(株)キーエンス製超深度形状測定顕微鏡VK-8510を用いて、ブラインドビアホールの凹み量を測定した。また、クロスセクションによる断面観察にて空隙の有無を確認した。
(均一電着性の評価方法)
上記、超深度形状測定顕微鏡VK-8510を用いて、テストパターンのあらかじめ決めた部分のめっき厚を測定した。そして、その最大、最小のめっき厚差を比較した。
これに対して、比較浴1は、均一電着性は良好であるが、凹部に対する埋め込み性が不十分であった。また、比較浴2は良好な埋め込み性が得られるが、本発明めっき液1に比べ凹み量が多く、また、本発明めっき液2に比べ均一電着性が悪かった。
Claims (2)
- 硫酸銅5水和物を50〜140g/L、硫酸を100〜220g/L、非イオン性ポリエーテル系高分子界面活性剤を0.01〜10g/L、含硫黄有機化合物を0.1〜200mg/L、及び含窒素有機化合物を0.1〜200mg/L含有し、塩化物イオン濃度が2〜15mg/Lである硫酸銅めっき液中において、凹部を有する被めっき物に対して、陰極電流密度0.2〜1.5A/dm 2 の直流電流を通電することによって、凹部を埋め込むことを特徴とする電気銅めっき方法。
- 被めっき物が、ブラインドビアホールを有するプリント配線板又は配線用の溝部を有する半導体ウェハーである請求項1に記載の電気銅めっき方法。
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JP2005065586A JP4894990B2 (ja) | 2005-03-09 | 2005-03-09 | 酸性電気銅めっき液 |
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JP2005065586A JP4894990B2 (ja) | 2005-03-09 | 2005-03-09 | 酸性電気銅めっき液 |
Publications (2)
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JP2006249478A JP2006249478A (ja) | 2006-09-21 |
JP4894990B2 true JP4894990B2 (ja) | 2012-03-14 |
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JP2005065586A Active JP4894990B2 (ja) | 2005-03-09 | 2005-03-09 | 酸性電気銅めっき液 |
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JP (1) | JP4894990B2 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101329459B1 (ko) | 2010-02-22 | 2013-11-15 | 제이엑스 닛코 닛세키 킨조쿠 가부시키가이샤 | 고순도 술폰산구리 수용액 및 그 제조방법 |
JP6754780B2 (ja) * | 2016-01-28 | 2020-09-16 | 株式会社堀場製作所 | 試料分析装置及び試料分析装置用集光ミラーユニット |
Family Cites Families (3)
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JP4354139B2 (ja) * | 2001-11-02 | 2009-10-28 | 凸版印刷株式会社 | 配線基板の製造方法 |
DE60336539D1 (de) * | 2002-12-20 | 2011-05-12 | Shipley Co Llc | Methode zum Elektroplattieren mit Umkehrpulsstrom |
JP4704761B2 (ja) * | 2005-01-19 | 2011-06-22 | 石原薬品株式会社 | 電気銅メッキ浴、並びに銅メッキ方法 |
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