JP6597740B2 - 成膜方法及び成膜装置 - Google Patents
成膜方法及び成膜装置 Download PDFInfo
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- JP6597740B2 JP6597740B2 JP2017165844A JP2017165844A JP6597740B2 JP 6597740 B2 JP6597740 B2 JP 6597740B2 JP 2017165844 A JP2017165844 A JP 2017165844A JP 2017165844 A JP2017165844 A JP 2017165844A JP 6597740 B2 JP6597740 B2 JP 6597740B2
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- silicon
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- 238000000034 method Methods 0.000 title claims description 34
- 239000007789 gas Substances 0.000 claims description 236
- 238000012545 processing Methods 0.000 claims description 150
- 238000000576 coating method Methods 0.000 claims description 40
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 38
- 239000011248 coating agent Substances 0.000 claims description 38
- 229910052751 metal Inorganic materials 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 31
- 239000000758 substrate Substances 0.000 claims description 27
- 150000002902 organometallic compounds Chemical class 0.000 claims description 26
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 25
- 229910052710 silicon Inorganic materials 0.000 claims description 25
- 239000010703 silicon Substances 0.000 claims description 25
- 239000010936 titanium Substances 0.000 claims description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 7
- 239000000460 chlorine Substances 0.000 claims description 7
- 229910052801 chlorine Inorganic materials 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims 1
- 239000010408 film Substances 0.000 description 252
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 59
- 238000011144 upstream manufacturing Methods 0.000 description 12
- 229910008482 TiSiN Inorganic materials 0.000 description 11
- QRXWMOHMRWLFEY-UHFFFAOYSA-N isoniazide Chemical compound NNC(=O)C1=CC=NC=C1 QRXWMOHMRWLFEY-UHFFFAOYSA-N 0.000 description 11
- 229910052581 Si3N4 Inorganic materials 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 9
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 9
- 238000000231 atomic layer deposition Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 239000002243 precursor Substances 0.000 description 7
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 6
- 239000012159 carrier gas Substances 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000012546 transfer Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000011109 contamination Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 4
- 229910010413 TiO 2 Inorganic materials 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 150000002736 metal compounds Chemical class 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- HSXKFDGTKKAEHL-UHFFFAOYSA-N tantalum(v) ethoxide Chemical compound [Ta+5].CC[O-].CC[O-].CC[O-].CC[O-].CC[O-] HSXKFDGTKKAEHL-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 1
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
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- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H01L21/0228—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition deposition by cyclic CVD, e.g. ALD, ALE, pulsed CVD
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- 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
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- 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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- 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
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- 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
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Description
次いで、前記シリコンにより構成される膜にその裏面が接するように前記基板を前記載置台に載置する載置工程と、
続いて有機金属化合物を含む第2のガスを前記処理容器内に供給して、前記有機金属化合物を構成する金属からなる膜を前記基板に成膜する成膜工程と、
を備え、
前記プリコート工程は、
前記有機金属化合物とは異なる化合物であり、且つ当該有機金属化合物と共通の金属を含むプリコート用のガスを前記処理容器内に供給し、前記処理容器内の部材に当該金属を含む下層膜を形成する第1のプリコート工程と、
次いで、前記第1のガスを前記処理容器内に供給し、前記下層膜に積層されるように前記シリコンにより構成される膜を形成する第2のプリコート工程と、
を含むことを特徴とする成膜方法。
シリコンを含む第1のガスを前記処理容器内に供給する第1のガス供給部と、
有機金属化合物を含む第2のガスを前記処理容器内に供給する第2のガス供給部と、
前記有機金属化合物とは異なる化合物であり、且つ当該有機金属化合物と共通の金属を含むプリコート用のガスを前記処理容器内に供給するプリコート用のガス供給部と、
前記第1のガスを前記基板が搬入されていない状態の前記処理容器内に供給し、前記載置台を含む当該処理容器内の部材の表面をシリコンにより構成される膜で被覆するプリコートステップと、次いで、前記シリコンにより構成される膜にその裏面が接するように前記載置台に載置された基板に対して前記第2のガスを前記処理容器内に供給して、前記有機金属化合物を構成する金属からなる膜を前記基板に成膜する成膜ステップと、が実行されるように制御信号を出力する制御部と、
を備え、
前記プリコートステップは、
前記プリコート用のガスを前記処理容器内に供給し、前記プリコート用ガスに含まれる金属を含む下層膜を当該処理容器内の部材に形成する第1のプリコートステップと、次いで、前記第1のガスを前記処理容器内に供給し、前記下層膜に積層されるように前記シリコンにより構成される膜を形成する第2のプリコートステップと、を含むことを特徴とする。
本発明の第1の実施形態に係る成膜装置1について、図1の縦断側面図を参照して説明する。この成膜装置1は、ウエハWを格納して処理を行う真空容器である処理容器11を備えており、ALDによって当該ウエハWに被処理膜としてSiを含有するTiN膜(以下、TiSiN膜と記載する)を成膜する。また、このウエハWが処理容器11内に搬入される前にプリコートが行われ、処理容器11内に設けられる各部材の表面にプリコート膜が形成される。このプリコート膜としては、下層膜であるTiN膜と上層膜であるアモルファスシリコン(a-Si)膜とからなる積層膜であり、これらTiN膜及びa-Si膜はALDによって処理容器11内に成膜される。このプリコート膜を構成するTiN膜はTiCl4ガス、即ち無機金属化合物を含有するプリカーサーを用いることで形成され、上記の被処理膜であるTiSiN膜はTDMATガス、即ち有機金属化合物を含有するプリカーサーを用いることで形成される。つまり、プリコート膜の成膜と被処理膜の成膜とで、共通にTi(チタン)を含むが互いに種類が異なる化合物が用いられる。
本発明の第2の実施形態に係る成膜装置7について図18に示している。この成膜装置7における成膜装置1との差異点としては、ガス供給路51の上流側には分岐流路56が3つのみ設けられており、流路52A、52B及び当該流路52A、52Bが接続される分岐流路56については設けられていないことが挙げられる。従って、流路52A、52Bに接続されるTiCl4ガス供給源55A、N2ガス供給源55Bも設けられていない。このような差異点を除き、成膜装置7は成膜装置1と同様に構成されている。
以下、本発明に関連して行われた評価試験について説明する。この評価試験においては、処理容器11内にプリコート膜を形成した後、200℃に加熱された処理容器11内にウエハWを搬送して、載置台31にウエハWを載置する。その後、処理容器11から搬出されたウエハWの裏面についてサンプルとして、全反射蛍光X線分析装置を使用することにより、1cm2あたりの原子数を測定した。処理容器11内に形成されるプリコート膜の種類については、測定を行う度に変更し、測定される原子数の違いを調べた。
1 成膜装置
10 制御部
11 処理容器
31 載置台
32 ヒーター
40 処理空間
55A TiCl4ガス供給源
55C TDMATガス供給源
55E SiH4ガス供給源
55G NH3ガス供給源
Claims (9)
- 基板が搬入されていない状態の処理容器内にシリコンを含む第1のガスを供給し、前記基板を載置するための載置台を含む前記処理容器内の部材の表面をシリコンにより構成される膜で被覆するプリコート工程と
次いで、前記シリコンにより構成される膜にその裏面が接するように前記基板を前記載置台に載置する載置工程と、
続いて有機金属化合物を含む第2のガスを前記処理容器内に供給して、前記有機金属化合物を構成する金属からなる膜を前記基板に成膜する成膜工程と、
を備え、
前記プリコート工程は、
前記有機金属化合物とは異なる化合物であり、且つ当該有機金属化合物と共通の金属を含むプリコート用のガスを前記処理容器内に供給し、前記処理容器内の部材に当該金属を含む下層膜を形成する第1のプリコート工程と、
次いで、前記第1のガスを前記処理容器内に供給し、前記下層膜に積層されるように前記シリコンにより構成される膜を形成する第2のプリコート工程と、
を含むことを特徴とする成膜方法。 - 前記成膜工程は、前記第1のガスを前記処理容器内に供給し、前記金属とシリコンとを含む膜を前記基板に成膜する工程であることを特徴とする請求項1記載の成膜方法。
- 前記成膜工程は、窒素を含む化合物である第3のガスを供給し、前記金属と前記シリコンと前記窒素とからなる膜を前記基板に成膜する工程であることを特徴とする請求項2記載の成膜方法。
- 前記第1のプリコート工程は、前記処理容器内の温度を第1の温度にした状態で行われ、
前記第2のプリコート工程は、前記処理容器内の温度を前記第1の温度よりも低い第2の温度にした状態で行われることを特徴とする請求項3記載の成膜方法。 - 前記第1の温度は400℃以上であり、前記第2の温度は300℃以下であることを特徴とする請求項4記載の成膜方法。
- 前記プリコート用のガスは前記金属の塩化物により構成され、前記第2のガスは塩素を構成成分として含まないことを特徴とする請求項1ないし5のいずれか一つに記載の成膜方法。
- 前記金属はチタンであることを特徴とする請求項1ないし6のいずれか一つに記載の成膜方法。
- 前記シリコンからなる膜は、アモルファスシリコン膜であることを特徴とする請求項1ないし7のいずれか一つに記載の成膜方法。
- 処理容器内に設けられた基板を載置する載置台と、
シリコンを含む第1のガスを前記処理容器内に供給する第1のガス供給部と、
有機金属化合物を含む第2のガスを前記処理容器内に供給する第2のガス供給部と、
前記有機金属化合物とは異なる化合物であり、且つ当該有機金属化合物と共通の金属を含むプリコート用のガスを前記処理容器内に供給するプリコート用のガス供給部と、
前記第1のガスを前記基板が搬入されていない状態の前記処理容器内に供給し、前記載置台を含む当該処理容器内の部材の表面をシリコンにより構成される膜で被覆するプリコートステップと、次いで、前記シリコンにより構成される膜にその裏面が接するように前記載置台に載置された基板に対して前記第2のガスを前記処理容器内に供給して、前記有機金属化合物を構成する金属からなる膜を前記基板に成膜する成膜ステップと、が実行されるように制御信号を出力する制御部と、
を備え、
前記プリコートステップは、
前記プリコート用のガスを前記処理容器内に供給し、前記プリコート用ガスに含まれる金属を含む下層膜を当該処理容器内の部材に形成する第1のプリコートステップと、次いで、前記第1のガスを前記処理容器内に供給し、前記下層膜に積層されるように前記シリコンにより構成される膜を形成する第2のプリコートステップと、を含むことを特徴とする成膜装置。
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