JP6583054B2 - 基板処理方法及び記憶媒体 - Google Patents
基板処理方法及び記憶媒体 Download PDFInfo
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- JP6583054B2 JP6583054B2 JP2016036013A JP2016036013A JP6583054B2 JP 6583054 B2 JP6583054 B2 JP 6583054B2 JP 2016036013 A JP2016036013 A JP 2016036013A JP 2016036013 A JP2016036013 A JP 2016036013A JP 6583054 B2 JP6583054 B2 JP 6583054B2
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- 239000000758 substrate Substances 0.000 title claims description 46
- 238000003672 processing method Methods 0.000 title claims description 12
- 238000003860 storage Methods 0.000 title claims description 7
- 238000012545 processing Methods 0.000 claims description 131
- 239000010936 titanium Substances 0.000 claims description 123
- 238000000034 method Methods 0.000 claims description 32
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 31
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 21
- 230000009467 reduction Effects 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 9
- 230000003213 activating effect Effects 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 238000005268 plasma chemical vapour deposition Methods 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052736 halogen Inorganic materials 0.000 claims description 3
- 150000002367 halogens Chemical class 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 2
- 239000010408 film Substances 0.000 description 235
- 239000007789 gas Substances 0.000 description 119
- 229910008484 TiSi Inorganic materials 0.000 description 39
- 230000000052 comparative effect Effects 0.000 description 31
- 239000000460 chlorine Substances 0.000 description 30
- 125000004433 nitrogen atom Chemical group N* 0.000 description 23
- 230000008569 process Effects 0.000 description 23
- 238000011946 reduction process Methods 0.000 description 19
- 238000012546 transfer Methods 0.000 description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 12
- 229910052739 hydrogen Inorganic materials 0.000 description 12
- 239000001257 hydrogen Substances 0.000 description 11
- 230000003746 surface roughness Effects 0.000 description 9
- 238000011144 upstream manufacturing Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000010410 layer Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000013078 crystal Substances 0.000 description 6
- 230000003028 elevating effect Effects 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- 238000000137 annealing Methods 0.000 description 5
- 239000007795 chemical reaction product Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- 238000005121 nitriding Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000010348 incorporation Methods 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 229940070337 ammonium silicofluoride Drugs 0.000 description 2
- 125000001309 chloro group Chemical group Cl* 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000000572 ellipsometry Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- 229910052774 Proactinium Inorganic materials 0.000 description 1
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000002079 cooperative effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 125000006850 spacer group Chemical group 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
- 238000012360 testing method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
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- 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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- 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
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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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- C23C16/22—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 inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/34—Nitrides
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- C23C16/45527—Atomic layer deposition [ALD] characterized by the ALD cycle, e.g. different flows or temperatures during half-reactions, unusual pulsing sequence, use of precursor mixtures or auxiliary reactants or activations
- C23C16/45536—Use of plasma, radiation or electromagnetic fields
- C23C16/45542—Plasma being used non-continuously during the ALD reactions
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- 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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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02612—Formation types
- H01L21/02617—Deposition types
- H01L21/0262—Reduction or decomposition of gaseous compounds, e.g. CVD
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- 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
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- 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
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- H01L21/67005—Apparatus not specifically provided for elsewhere
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- H01L21/673—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere using specially adapted carriers or holders; Fixing the workpieces on such carriers or holders
- H01L21/6735—Closed carriers
- H01L21/67389—Closed carriers characterised by atmosphere control
- H01L21/67393—Closed carriers characterised by atmosphere control characterised by the presence of atmosphere modifying elements inside or attached to the closed carrierl
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76843—Barrier, adhesion or liner layers formed in openings in a dielectric
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
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- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76853—Barrier, adhesion or liner layers characterized by particular after-treatment steps
- H01L21/76861—Post-treatment or after-treatment not introducing additional chemical elements into the layer
- H01L21/76862—Bombardment with particles, e.g. treatment in noble gas plasmas; UV irradiation
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01022—Titanium [Ti]
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- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Plasma & Fusion (AREA)
- Electromagnetism (AREA)
- Inorganic Chemistry (AREA)
- Chemical Vapour Deposition (AREA)
- Electrodes Of Semiconductors (AREA)
Description
また特許文献2には、プラズマCVDによりTi膜の成膜処理を行うチャンバ内にH2ガスを流したままTiCl4ガスを間欠的に供給する技術が記載されている。この技術は、膜中のClを除去しつつ、低温プロセスを実現することを目的としており、本発明の目的とは異なることから、手法においても本発明とは異なる。
前記金属を含む膜によりプリコートされた処理容器内に、シリコンを含む層が表面に形成された被処理基板を搬入し、当該処理容器内に前記金属とハロゲンとの化合物及び水素ガスを導入し、プラズマを生成して当該被処理基板に金属膜を成膜する工程と、
次いで前記処理容器内に、水素ガスを活性化させて得たプラズマの雰囲気を形成する第1の還元処理工程と、
その後、前記被処理基板を前記処理容器内から搬出する工程と
続いて前記処理容器内に、水素ガスを活性化させて得たプラズマの雰囲気を形成する第2の還元処理工程と、
しかる後、前記処理容器内に後続の被処理基板を搬入する工程と、を含むことを特徴とする
前記コンピュータプログラムは、上述の基板処理方法を実行するようにステップ群が組まれていることを特徴とする
またプラズマ処理装置2は、既述の制御部9が接続され、制御部9には、後述するプリコート処理及びウエハWに対するプラズマ処理を含む処理を進行させるように命令(各ステップ)が組み込まれたプログラムを備えている。
そしてステップS2のTi膜の窒化処理の後、再びステップS1のTi膜の成膜を行い、さらにその後ステップS2のTi膜の窒化処理を行う。このようにステップS1のTi膜の成膜と、ステップS2のTi膜の窒化処理と、をn(nは1以上の自然数)回繰り返し行い、200nm以上、例えば550nmの膜厚のTiN膜を成膜する。
その後ゲートバルブ100を閉じ、真空排気部24により排気を行い、処理容器20内の圧力を例えば133Paに設定する。その後、処理容器20内にTiCl4ガスを例えば10sccmの流量、Arガスを例えば1000sccmの流量、及びH2ガスを例えば10sccmの流量で夫々供給し、高周波電源51から高周波電力を印加する(ステップS12)。これによりTiCl4ガスとH2ガスとが活性化されて反応し、ウエハWの表面に例えば5nmの膜厚のTi膜が成膜される。
ステップS12において、TiCl4ガス及びH2ガスを供給しているため、処理容器20内やウエハWの表面には、TiClxやClxを含む成分が残留している。そしてステップS14にてH2ガスを活性化すると、H2ガスを活性化して得たプラズマにより、TiClxやClxを含む成分が還元されて除去される。なお図6、及び後述の図7においては、プラズマ処理装置2は簡略化して記載した。
従ってプラズマ処理装置2において、後続のウエハWを搬入してTi膜103の成膜処理を行うときに処理容器20内に残存しているTiClxやClxを含む成分を抑制することができる。
第2の還元処理は、処理容器20内にウエハWを載置していないため、第1の還元処理よりも長い時間、例えば90秒行うようにしてもよい。また例えば第1の還元処理は、例えばH2ガスの供給流量を少なくして、プラズマの強度を低くし、第2の還元処理においては、H2ガスの供給流量を多くしてプラズマの強度を上げるようにしてもよい。
また本発明は、TiCl4ガスに代えて、TiF4などのガスを用いてTi膜103を成膜する基板処理方法であってもよい。更に例えばタンタル(Ta)膜をプラズマCVDにより成膜する基板処理方法であってもよい。
さらに原料ガス、例えばTiCl4ガスと、反応ガス、例えばプラズマ化したH2ガスと、を交互に間欠的に繰り返し供給してTi膜103を成膜するALD法であってもよい。
(実施例1)
上述の実施の形態に従い処理を行ったウエハWを実施例1とした。
(実施例2)
図8(a)に示すように図3に示したプリコート処理にてステップS2においてNH3ガスを用いて、Ti膜の窒化を行い、またその後にステップS3、及びS4を行なわずにプリコートしたプラズマ処理装置2により、実施例1と同様のプロセス処理を行ったウエハWを実施例2とした。実施例2では、ステップS1及びステップS2を例えばn回繰り返して、TiN膜を膜厚850nmに成膜した。
(比較例)
図4に示したウエハWの処理のプロセスにおいて、ステップS14における第1の還元処理をNH3ガスを用いて行い、ステップS16における第2の還元処理をNH3ガスを用いたプラズマ処理によりTiN膜を成膜した。またプリコート膜として膜厚550nmのTiN膜のみを成膜した例を比較例とした。なお図8(a)のステップS1、S2及び図8(b)のステップS21〜S26は、夫々比較例におけるプリコート処理とプロセス処理とにおけるステップ群を示す。
この図9の結果について図10に模式的に示した。図10に示すように比較例においては、Ti膜103中のN原子の濃度は50原子%程度であるが、プリコートを除いて、第1の還元処理及び第2の還元処理を実施例1と同様に水素プラズマを用いることで、ウエハWに形成されたTi膜103中のN原子の濃度を10原子%程度まで低減できることが分かる。更に処理容器20内に行うプリコートをTiN膜のみとすることに代えて、TiN膜の表面をTi膜により覆い、次いで水素プラズマ処理を行うことにより、ウエハWに形成されたTi膜103中のN原子の濃度を2原子%以下まで低減できることが分かる。
この結果実施例1のTiSix膜102の比抵抗は207μΩ・cmであり、実施例2のTiSix膜102の比抵抗は472μΩ・cmであった。また比較例のTiSix膜102の比抵抗は620μΩ・cmであった。実施例では、比較例に比べて、TiSix膜102の比抵抗が大きく減少しており、特に実施例1では、比較例の1/3に減少していた。
また実施例2では、TiSix膜102の平均膜厚は、14.3nmであり、比較例では、TiSix膜102の平均膜厚は、15.8nmであり、比較例に比べて改善が見られた。
また当該サンプルをX線結晶構造解析によりTiSix膜102の結晶性を確認した。図15はこの結果を示し、実施例1、2及び比較例におけるX線結晶構造解析の結果を示す。図15に示すように、実施例1においては、C49相のTiSi2(061)及びC49相のTiSi2(200)の結晶を示すピークが大きく現れていた。また実施例2においてもC49相のTiSi2(061)及びC49相のTiSi2(200)の結晶を示すピークが見られたが、比較例においては、C49相のTiSi2(060)の結晶を示すピークが僅かに見られ、C49相のTiSi2(061)及びC49相のTiSi2(200)の結晶を示すピークはほとんど見られなかった。このように実施例1、2は、比較例に比べてシリサイド化が促進されて、TiSix膜102の結晶化が進行していることが確認できる。
3 載置台
5 ガスシャワーヘッド
9 制御部
20 処理容器
51 高周波電源
90 COR処理装置
91 アニール装置
92 熱ALD装置
101 Si膜
102 TiSix膜
103 Ti膜
104 TiN膜
W ウエハ
Claims (6)
- プラズマを用いて被処理基板に金属膜を成膜する方法において、
前記金属を含む膜によりプリコートされた処理容器内に、シリコンを含む層が表面に形成された被処理基板を搬入し、当該処理容器内に前記金属とハロゲンとの化合物及び水素ガスを導入し、プラズマを生成して当該被処理基板に金属膜を成膜する工程と、
次いで前記処理容器内に、水素ガスを活性化させて得たプラズマの雰囲気を形成する第1の還元処理工程と、
その後、前記被処理基板を前記処理容器内から搬出する工程と、
続いて前記処理容器内に、水素ガスを活性化させて得たプラズマの雰囲気を形成する第2の還元処理工程と、
しかる後、前記処理容器内に後続の被処理基板を搬入する工程と、を含むことを特徴とする基板処理方法。 - 前記金属膜を成膜する工程は、プラズマCVDを行う工程であることを特徴とする請求項1記載の基板処理方法。
- 前記処理容器内に前記化合物及び水素ガスを導入しながらプラズマを生成して当該処理容器内を金属膜によりプリコートする工程と、
続いて当該処理容器内に、水素ガスを活性化させて得たプラズマの雰囲気を形成する工程と、を含むことを特徴とする請求項1または2記載の基板処理方法 - 前記金属膜はチタン膜であり、前記化合物は四塩化チタンであることを特徴とする請求項1ないし3のいずれか一項に記載の基板処理方法。
- 前記金属膜はチタン膜であり、チタン膜によりプリコートする工程の前に、前記処理容器内をチタンナイトライド膜によりプリコートする工程を行うことを特徴とする請求項3記載の基板処理方法。
- 処理容器内にてプラズマを用いて被処理基板に金属膜を成膜する装置に用いられるコンピュータプログラムを記憶する記憶媒体であって、
前記コンピュータプログラムは、請求項1ないし5のいずれか一項に記載の基板処理方法を実行するようにステップ群が組まれていることを特徴とする記憶媒体。
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