JP2021082828A - 基板の表面の金属汚染物を減少させるための方法 - Google Patents
基板の表面の金属汚染物を減少させるための方法 Download PDFInfo
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- 239000000758 substrate Substances 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000011109 contamination Methods 0.000 title abstract description 6
- 150000002500 ions Chemical class 0.000 claims abstract description 33
- 238000009832 plasma treatment Methods 0.000 claims abstract description 25
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 9
- 239000000356 contaminant Substances 0.000 claims description 54
- 229910052751 metal Inorganic materials 0.000 claims description 49
- 239000002184 metal Substances 0.000 claims description 49
- 229910052594 sapphire Inorganic materials 0.000 claims description 47
- 239000010980 sapphire Substances 0.000 claims description 47
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 21
- 239000007789 gas Substances 0.000 claims description 21
- 229910052710 silicon Inorganic materials 0.000 claims description 21
- 239000010703 silicon Substances 0.000 claims description 21
- 239000004065 semiconductor Substances 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 12
- 229910052756 noble gas Inorganic materials 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 230000006866 deterioration Effects 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- -1 for example Substances 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 19
- 239000000126 substance Substances 0.000 description 13
- 229910052742 iron Inorganic materials 0.000 description 12
- 238000011282 treatment Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 235000012431 wafers Nutrition 0.000 description 9
- 230000003746 surface roughness Effects 0.000 description 8
- 238000004630 atomic force microscopy Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
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- 239000003344 environmental pollutant Substances 0.000 description 4
- 238000004377 microelectronic Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
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- 231100000719 pollutant Toxicity 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 150000002835 noble gases Chemical class 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 238000012552 review Methods 0.000 description 2
- 238000004439 roughness measurement Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 229910021332 silicide Inorganic materials 0.000 description 2
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
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- 239000012670 alkaline solution Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- SWXQKHHHCFXQJF-UHFFFAOYSA-N azane;hydrogen peroxide Chemical compound [NH4+].[O-]O SWXQKHHHCFXQJF-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
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- 238000012512 characterization method Methods 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000005108 dry cleaning Methods 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- XEMZLVDIUVCKGL-UHFFFAOYSA-N hydrogen peroxide;sulfuric acid Chemical compound OO.OS(O)(=O)=O XEMZLVDIUVCKGL-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000010070 molecular adhesion Effects 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000678 plasma activation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 1
- 238000004876 x-ray fluorescence Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
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Abstract
Description
本発明は、金属汚染物を2E+10atoms/cm2未満まで減少させることを可能にし、
金属汚染物は、Ti及び/又はNi及び/又はFe元素を含み、
基板は、5よりも大きい硬度(モース硬度スケール)、そして7よりも大きいことが好ましい硬度を有し、
基板は、絶縁体、例えば、サファイアであり、
基板は、半導体、例えば、シリコンである。
供給されたガスは、少なくとも1種類の希ガス、好ましくはアルゴンを含み、
高周波電磁場は、0.8ワット/cm2と4ワット/cm2との間、好ましくは2ワット/cm2と3ワット/cm2との間のパワー密度を与え、
供給されたガスは、30ミリトールと120ミリトールとの間のガス圧を有し、
供給されたガスは、75sccmのガス流で配送され、
プラズマ処理は、10〜60秒間続く。
Claims (14)
- イオン照射による基板の表面のプラズマ処理を含む、前記基板の前記表面の金属汚染物を減少させるための方法であって、供給されたガスのプラズマが生成され、前記プラズマ中のイオンの照射エネルギーが高周波電磁場によって制御される、方法において、前記イオンの前記照射エネルギーが、前記金属汚染物をはぎ取るための第1のしきい値よりも大きく、且つ前記イオンの前記照射エネルギーが、前記基板の前記表面の表面品質劣化を防止するための第2のしきい値よりも小さいことを特徴とする、方法。
- 前記金属汚染物が、イオン照射による前記基板の前記表面の前記プラズマ処理によって2E10atoms/cm2未満まで減少されることを特徴とする、請求項1に記載の方法。
- 前記金属汚染物が、Ti及び/又はNi及び/又はFe元素からの汚染物を含むことを特徴とする、請求項2に記載の方法。
- 前記基板が、5よりも大きい硬度(モース硬度スケール)、好ましくは7よりも大きい硬度を有することを特徴とする、請求項1に記載の方法。
- 前記基板が、絶縁体、例えば、サファイアであることを特徴とする、請求項4に記載の方法。
- 前記基板が、半導体、例えば、シリコンであることを特徴とする、請求項4に記載の方法。
- 前記供給されたガスが、少なくとも1種類の希ガス、好ましくはアルゴンを含むことを特徴とする、請求項1に記載の方法。
- 前記高周波電磁場が、0.8ワット/cm2と4ワット/cm2との間、好ましくは2ワット/cm2と3ワット/cm2との間のパワー密度を与えることを特徴とする、請求項1に記載の方法。
- 前記供給されたガスが、30ミリトールと120ミリトールとの間のガス圧を有することを特徴とする、請求項1に記載の方法。
- 前記供給されたガスが、75sscmのガス流で配送されることを特徴とする、請求項1に記載の方法。
- 前記プラズマ処理が、10〜60秒間続くことを特徴とする、請求項1に記載の方法。
- ウェハボンディングによって、プラズマ処理したサファイア基板表面とシリコン基板などの半導体基板表面との間にボンディングを形成するためのボンディングプロセスであって、前記サファイア基板表面の金属汚染物が、請求項1〜11のいずれか一項に記載の方法にしたがって、イオン照射を用いたプラズマ処理によって減少される、ボンディングプロセス。
- プラズマ処理したサファイア基板表面と半導体基板表面との間のボンディング強度を増加させる熱処理ステップを含むことを特徴とする、請求項12に記載のボンディングプロセス。
- プラズマ処理したサファイア基板表面及び半導体基板表面を含む基板であって、ボンディングが、前記2つの表面間のウェハボンディングによって形成されており、前記サファイア基板表面の金属汚染物が、請求項1〜11のいずれか一項に記載の方法にしたがって、イオン照射のプラズマ処理によって減少されている、基板。
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FR1552416A FR3034252B1 (fr) | 2015-03-24 | 2015-03-24 | Procede de reduction de la contamination metallique sur la surface d'un substrat |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010278337A (ja) * | 2009-05-29 | 2010-12-09 | Shin-Etsu Chemical Co Ltd | 表面欠陥密度が少ないsos基板 |
JP2010278341A (ja) * | 2009-05-29 | 2010-12-09 | Shin-Etsu Chemical Co Ltd | 貼り合わせsos基板 |
WO2014017369A1 (ja) * | 2012-07-25 | 2014-01-30 | 信越化学工業株式会社 | ハイブリッド基板の製造方法及びハイブリッド基板 |
WO2014017368A1 (ja) * | 2012-07-25 | 2014-01-30 | 信越化学工業株式会社 | Sos基板の製造方法及びsos基板 |
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