JP6220649B2 - 金属膜の成膜方法 - Google Patents
金属膜の成膜方法 Download PDFInfo
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- JP6220649B2 JP6220649B2 JP2013242658A JP2013242658A JP6220649B2 JP 6220649 B2 JP6220649 B2 JP 6220649B2 JP 2013242658 A JP2013242658 A JP 2013242658A JP 2013242658 A JP2013242658 A JP 2013242658A JP 6220649 B2 JP6220649 B2 JP 6220649B2
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- 238000000034 method Methods 0.000 title claims description 79
- 229910052751 metal Inorganic materials 0.000 title claims description 72
- 239000002184 metal Substances 0.000 title claims description 72
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 184
- 239000007789 gas Substances 0.000 claims description 150
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 112
- 229910052759 nickel Inorganic materials 0.000 claims description 61
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 60
- 230000015572 biosynthetic process Effects 0.000 claims description 58
- 229910021529 ammonia Inorganic materials 0.000 claims description 52
- 239000001257 hydrogen Substances 0.000 claims description 43
- 229910052739 hydrogen Inorganic materials 0.000 claims description 43
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 42
- 239000012298 atmosphere Substances 0.000 claims description 38
- 229910052757 nitrogen Inorganic materials 0.000 claims description 36
- 239000003446 ligand Substances 0.000 claims description 29
- 150000001875 compounds Chemical class 0.000 claims description 27
- 238000012545 processing Methods 0.000 claims description 26
- 239000000758 substrate Substances 0.000 claims description 21
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 12
- 150000002736 metal compounds Chemical class 0.000 claims description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 239000010953 base metal Substances 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 description 52
- 230000008569 process Effects 0.000 description 50
- 239000002994 raw material Substances 0.000 description 24
- 239000012535 impurity Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 14
- 238000005229 chemical vapour deposition Methods 0.000 description 12
- 230000005587 bubbling Effects 0.000 description 11
- 230000007246 mechanism Effects 0.000 description 9
- 239000011261 inert gas Substances 0.000 description 7
- 238000010926 purge Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- -1 nickel nitride Chemical class 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910021334 nickel silicide Inorganic materials 0.000 description 3
- RUFLMLWJRZAWLJ-UHFFFAOYSA-N nickel silicide Chemical compound [Ni]=[Si]=[Ni] RUFLMLWJRZAWLJ-UHFFFAOYSA-N 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 150000002429 hydrazines Chemical class 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- PEUPIGGLJVUNEU-UHFFFAOYSA-N nickel silicon Chemical compound [Si].[Ni] PEUPIGGLJVUNEU-UHFFFAOYSA-N 0.000 description 2
- 238000005268 plasma chemical vapour deposition Methods 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
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- DIIIISSCIXVANO-UHFFFAOYSA-N 1,2-Dimethylhydrazine Chemical compound CNNC DIIIISSCIXVANO-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BAVYZALUXZFZLV-UHFFFAOYSA-O Methylammonium ion Chemical compound [NH3+]C BAVYZALUXZFZLV-UHFFFAOYSA-O 0.000 description 1
- 241000287462 Phalacrocorax carbo Species 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- HDZGCSFEDULWCS-UHFFFAOYSA-N monomethylhydrazine Chemical compound CNN HDZGCSFEDULWCS-UHFFFAOYSA-N 0.000 description 1
- XIKYYQJBTPYKSG-UHFFFAOYSA-N nickel Chemical compound [Ni].[Ni] XIKYYQJBTPYKSG-UHFFFAOYSA-N 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
- H01L21/28194—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation by deposition, e.g. evaporation, ALD, CVD, sputtering, laser deposition
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/06—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
- C23C16/18—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material from metallo-organic compounds
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28026—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor
- H01L21/28035—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being silicon, e.g. polysilicon, with or without impurities
- H01L21/28044—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being silicon, e.g. polysilicon, with or without impurities the conductor comprising at least another non-silicon conductive layer
- H01L21/28061—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being silicon, e.g. polysilicon, with or without impurities the conductor comprising at least another non-silicon conductive layer the conductor comprising a metal or metal silicide formed by deposition, e.g. sputter deposition, i.e. without a silicidation reaction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/28556—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table by chemical means, e.g. CVD, LPCVD, PECVD, laser CVD
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- H01L2924/01—Chemical elements
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Description
本実施形態では、金属膜としてニッケル膜を形成する場合について説明する。図1は、本発明の一実施形態に係る金属膜の成膜方法を実施するための成膜装置の一例を示す模式図である。
まず、ゲートバルブ25を開け、図示せぬ搬送装置によりウエハWを、搬入出口24を介してチャンバー1内に搬入し、サセプタ2上に載置する。次いで、チャンバー1内を排気装置23により排気してチャンバー1内を所定の圧力にし、サセプタ2を所定温度に加熱する。
上記ステップ1の初期成膜工程においては、チャンバー1内の圧力:133.3〜2000Pa(1〜15Torr)、サセプタ2によるウエハWの加熱温度(成膜温度):200〜350℃、キャリアArガス流量:50〜500mL/min(sccm)、NH3ガス流量:10〜2000mL/min(sccm)が好ましい。
ここでは、成膜原料としてNi(II)(tBu−AMD)2を用い、還元ガスとしてNH3ガスを用いて、Siウエハ上に約10nmの初期Ni膜を成膜し、次いでH2ガスを供給して水素処理を行い、真空引きを行った後、NH3ガスおよびArガスの混合ガスで昇圧し(アンモニア雰囲気形成工程に相当)、その後、成膜原料としてNi(II)(tBu−AMD)2を用い、還元ガスとしてH2ガスを用いて主成膜を行い、主成膜の成膜時間を変化させて本発明サンプルを作製した。水素処理後の昇圧をArガスで行った以外は同様にして比較サンプルを作製した。
2;サセプタ
5;ヒーター
10;シャワーヘッド
30;ガス供給機構
31;成膜原料タンク
42;NH3ガス供給源
43;H2ガス供給源
50;制御部
51;プロセスコントローラ
53;記憶部
W;半導体ウエハ
Claims (9)
- 処理容器内に被処理基板を配置し、被処理基板上に、分子構造中に窒素−炭素結合をもつ配位子を有し、配位子中の窒素が金属に配位した構造を有する金属含有化合物ガスと、アンモニア、ヒドラジン、およびこれらの誘導体から選択された少なくとも1種からなる還元ガスとを供給して、CVDにより初期金属膜を成膜する初期成膜工程と、
その後、前記処理容器内に水素ガスを供給して被処理基板に対して水素処理を行う水素処理工程と、
その後、前記処理容器内をアンモニアを含む雰囲気とするアンモニア雰囲気形成工程と、
その後、被処理基板に形成された初期金属膜の上に、分子構造中に窒素−炭素結合をもつ配位子を有し、配位子中の窒素が金属に配位した構造を有する金属含有化合物ガスと、水素ガスからなる還元ガスを供給して、CVDにより主金属膜を成膜する主成膜工程と
を有し、
前記主成膜工程は、吸着しているアンモニアと前記金属含有化合物ガスとにより窒素を含む金属膜が形成される反応と、前記窒素を含む金属膜中の窒素と水素ガスとによりアンモニアを生成する反応との繰り返しを含むことを特徴とする金属膜の成膜方法。 - 前記主成膜工程の後、前記処理容器内に水素ガスを供給して被処理基板に対して水素処理を行う第2の水素処理工程をさらに有することを特徴とする請求項1に記載の金属膜の成膜方法。
- 前記アンモニア雰囲気形成工程は、前記水素処理工程の後に、前記処理容器内を真空引きし、引き続き昇圧する際に、前記処理容器内にアンモニアガスを含むガスを導入することにより行われることを特徴とする請求項1または請求項2に記載の金属膜の成膜方法。
- 前記初期成膜工程、前記水素処理工程、前記アンモニア雰囲気形成工程、および前記主成膜工程は、同一の処理容器内で行われることを特徴とする請求項1から請求項3のいずれか1項に記載の金属膜の成膜方法。
- 前記金属含有化合物は、金属アミジネート系化合物であることを特徴とする請求項1から請求項4のいずれか1項に記載の金属膜の成膜方法。
- 前記金属アミジネート系化合物はニッケルアミジネートであり、前記金属膜はニッケル膜であることを特徴とする請求項5に記載の金属膜の成膜方法。
- 前記アンモニア雰囲気形成工程は、アンモニアガスの分圧を667Pa以上とすることを特徴とする請求項6に記載の金属膜の成膜方法。
- 前記初期成膜工程、前記水素処理工程、前記アンモニア雰囲気形成工程、および前記主成膜工程は、200〜350℃で行われることを特徴とする請求項6または請求項7に記載の金属膜の成膜方法。
- コンピュータ上で動作し、成膜装置を制御するためのプログラムが記憶された記憶媒体であって、前記プログラムは、実行時に、請求項1から請求項8のいずれかの金属膜の成膜方法が行われるように、コンピュータに前記成膜装置を制御させることを特徴とする記憶媒体。
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