JP5483906B2 - 半導体装置およびその製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 98
- 238000004519 manufacturing process Methods 0.000 title claims description 30
- 238000007747 plating Methods 0.000 claims description 165
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 116
- 239000000758 substrate Substances 0.000 claims description 103
- 238000000034 method Methods 0.000 claims description 65
- 229910052751 metal Inorganic materials 0.000 claims description 57
- 239000002184 metal Substances 0.000 claims description 57
- 239000010931 gold Substances 0.000 claims description 48
- 229910052759 nickel Inorganic materials 0.000 claims description 18
- 238000005530 etching Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 6
- 229910052731 fluorine Inorganic materials 0.000 claims description 6
- 239000011737 fluorine Substances 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052737 gold Inorganic materials 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 238000000151 deposition Methods 0.000 claims description 4
- 238000007772 electroless plating Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 77
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- 229910021364 Al-Si alloy Inorganic materials 0.000 description 18
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- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 10
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- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
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- 229910052782 aluminium Inorganic materials 0.000 description 2
- KVBCYCWRDBDGBG-UHFFFAOYSA-N azane;dihydrofluoride Chemical compound [NH4+].F.[F-] KVBCYCWRDBDGBG-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- SRCZENKQCOSNAI-UHFFFAOYSA-H gold(3+);trisulfite Chemical compound [Au+3].[Au+3].[O-]S([O-])=O.[O-]S([O-])=O.[O-]S([O-])=O SRCZENKQCOSNAI-UHFFFAOYSA-H 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
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- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
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- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005844 autocatalytic reaction Methods 0.000 description 1
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
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- 150000002500 ions Chemical class 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- XTFKWYDMKGAZKK-UHFFFAOYSA-N potassium;gold(1+);dicyanide Chemical compound [K+].[Au+].N#[C-].N#[C-] XTFKWYDMKGAZKK-UHFFFAOYSA-N 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 1
- ZWZLRIBPAZENFK-UHFFFAOYSA-J sodium;gold(3+);disulfite Chemical compound [Na+].[Au+3].[O-]S([O-])=O.[O-]S([O-])=O ZWZLRIBPAZENFK-UHFFFAOYSA-J 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/34—Strap connectors, e.g. copper straps for grounding power devices; Manufacturing methods related thereto
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
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- H01L2224/83—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a layer connector
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Description
(実施の形態1)
最初に、本発明の実施の形態1の半導体装置の製造方法について説明する。
まず、図5を参照して、半導体ウェハの構成について説明する。基板1の一方表面1aおよび他方表面1b上にAlまたはAl−Si合金からなる金属層2が形成されている。基板の一方表面1a、側面1cおよび他方表面1bの端部1d上に形成された金属層2上にNiめっき膜7が形成されている。Niめっき膜7上にAuめっき膜8が形成されている。基板1の他方表面1b側には開口電極が形成されている。
本実施の形態によれば、基板1の一方表面1a側と他方表面1b側の端部1d上に形成された金属層2上に一括して導電層であるNiめっき膜7およびAuめっき膜8を形成することができる。これにより、一方表面1aと他方表面1bとの間で内部応力を相殺することができる。したがって、基板1の反りを抑制することができる。よって、ウェハ反りを低減することができる。
本発明の実施の形態2の半導体装置の製造方法は、実施の形態1の半導体装置の製造方法と比較して、基板の側面にめっき膜を形成しない点が主に異なっている。
図6は実施の形態1における半導体装置の製造方法の第5工程を示す図5に対応する図である。図6を参照して、実施の形態1と同様に、互いに対向する一方表面1aおよび他方表面1bを有する基板1が準備される。基板1の一方表面1aおよび他方表面1bにはAlまたはAl−Si合金からなる金属層2が形成される。
まず、図6を参照して、半導体ウェハの構成について説明する。基板1の一方表面1aおよび他方表面1b上にAlまたはAl−Si合金からなる金属層2が形成されている。基板の一方表面1aおよび他方表面1bの中央部に形成された金属層2上にNiめっき膜7が形成されている。Niめっき膜7上にAuめっき膜8が形成されている。基板1の他方表面1b側には開口電極が形成されている。
本実施の形態によれば、基板1の一方表面1a側および他方表面1b側に一括して同じ膜厚のNiめっき膜7およびAuめっき膜8が形成されるため、基板1の一方表面1aおよび他方表面1bの間でより内部応力を相殺することができる。これにより、ウェハ反り量を低減させることができる。
本発明の実施の形態3の半導体装置の製造方法は、実施の形態1の半導体装置の製造方法と比較して、基板の他方表面の中央部にめっき膜を形成する点が主に異なっている。
図7は実施の形態1における半導体装置の製造方法の第5工程を示す図5に対応する図である。図7を参照して、実施の形態1と同様に、互いに対向する一方表面1aおよび他方表面1bを有する基板1が準備される。基板1の一方表面1aおよび他方表面1bにはAlまたはAl−Si合金からなる金属層2が形成される。
なお、本実施の形態のこれ以外の製造方法および構成は上述した実施の形態1と同様であるため、同一の要素については同一の符号を付し、その説明を省略する。
以上により、本実施の形態3の半導体装置の製造方法および半導体装置によれば、実施の形態1および2と同様の作用効果を有する。
(実施例1)
本発明の実施例1について説明する。
本発明の実施例2について説明する。
本発明の実施例3について説明する。
比較例1について説明する。
Claims (4)
- 側面と互いに対向する一方表面および他方表面を有するSi基板を準備する工程と、
前記Si基板の前記一方表面および前記他方表面ならびに前記側面に無電解めっき法により導電層を形成する工程とを備え、
前記導電層を形成する工程は、前記一方表面および前記他方表面に金属層を形成する工程と、フッ素系の液を使用して前記側面に形成されたSi酸化皮膜を除去するエッチング処理の後に、前記金属層上にZnめっき層を形成し、前記Znめっき層のZnをニッケルに置換し、かつ前記Si基板の前記側面上にニッケルを析出させてリン含有量が5質量%以上のニッケルめっき膜を形成する工程と、前記ニッケルめっき膜上に金めっき膜を形成する工程とを含む、半導体装置の製造方法。 - 側面と互いに対向する一方表面および他方表面とを有するSi基板を準備する工程と、
前記Si基板の前記一方表面および前記側面に無電解めっき法により導電層を形成する工程とを備え、
前記導電層を形成する工程は、前記一方表面に金属層を形成する工程と、フッ素系の液を使用して前記側面に形成されたSi酸化皮膜を除去するエッチング処理の後に、前記金属層上にZnめっき層を形成し、前記Znめっき層のZnをニッケルに置換し、かつ前記Si基板の前記側面上にニッケルを析出させてリン含有量が5質量%以上のニッケルめっき膜を形成する工程と、前記ニッケルめっき膜上に金めっき膜を形成する工程とを含む、半導体装置の製造方法。 - 側面と互いに対向する一方表面および他方表面とを有するSi基板と、
前記Si基板の前記一方表面とフッ素系の液を使用したエッチング処理によってSi酸化皮膜が除去された前記側面上とに無電解めっき法により形成された導電層とを備え、
前記導電層は、前記一方表面に形成された金属層と、前記金属層上にZnめっき層を形成し、前記Znめっき層のZnをニッケルに置換し、かつ前記Si基板の前記側面上にニッケルを析出させて形成されたリン含有量が5質量%以上のニッケルめっき膜と、前記ニッケルめっき膜上に形成された金めっき膜とを含む、半導体ウェハ状の半導体装置。 - 前記導電層が前記Si基板の前記他方表面にも形成されている、請求項3に記載の半導体ウェハ状の半導体装置。
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JP5733150B2 (ja) * | 2011-10-13 | 2015-06-10 | 株式会社デンソー | 半導体装置の製造方法 |
JP5669780B2 (ja) * | 2012-03-21 | 2015-02-18 | 三菱電機株式会社 | 半導体装置の製造方法 |
DE102015104570B4 (de) * | 2015-03-26 | 2019-07-11 | Infineon Technologies Ag | Leistungs-chip und chipanordnung |
WO2016163319A1 (ja) * | 2015-04-06 | 2016-10-13 | 三菱電機株式会社 | 半導体素子及びその製造方法 |
JP2017059636A (ja) | 2015-09-15 | 2017-03-23 | 三菱電機株式会社 | 半導体装置の製造方法 |
JP6746185B2 (ja) * | 2016-02-01 | 2020-08-26 | アスカコーポレーション株式会社 | 半導体ウェハめっき用治具 |
JP7075847B2 (ja) * | 2018-08-28 | 2022-05-26 | 株式会社 日立パワーデバイス | 半導体装置および電力変換装置 |
JP7516736B2 (ja) | 2019-10-18 | 2024-07-17 | 富士電機株式会社 | 半導体装置 |
US20230040727A1 (en) * | 2020-05-13 | 2023-02-09 | Mitsubishi Electric Corporation | Semiconductor device |
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JP2785102B2 (ja) * | 1994-03-31 | 1998-08-13 | 株式会社ジャパンエナジー | 無電解金めっき方法 |
JP2980066B2 (ja) * | 1997-07-07 | 1999-11-22 | 日本電気株式会社 | 半導体装置 |
US6494219B1 (en) * | 2000-03-22 | 2002-12-17 | Applied Materials, Inc. | Apparatus with etchant mixing assembly for removal of unwanted electroplating deposits |
US6361675B1 (en) * | 1999-12-01 | 2002-03-26 | Motorola, Inc. | Method of manufacturing a semiconductor component and plating tool therefor |
JP3941915B2 (ja) * | 2001-03-30 | 2007-07-11 | 新電元工業株式会社 | 半導体装置の製造方法 |
JP3530149B2 (ja) * | 2001-05-21 | 2004-05-24 | 新光電気工業株式会社 | 配線基板の製造方法及び半導体装置 |
JP3829860B2 (ja) * | 2004-01-30 | 2006-10-04 | 株式会社デンソー | 半導体チップの製造方法 |
JP4559818B2 (ja) * | 2004-04-30 | 2010-10-13 | アルプス電気株式会社 | シリコン基板の無電解めっき方法およびシリコン基板上の金属層形成方法 |
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JP2007073611A (ja) * | 2005-09-05 | 2007-03-22 | Renesas Technology Corp | 電子装置およびその製造方法 |
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