JP6745887B2 - 半導体装置の製造方法、基板処理装置およびプログラム - Google Patents
半導体装置の製造方法、基板処理装置およびプログラム Download PDFInfo
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- JP6745887B2 JP6745887B2 JP2018540555A JP2018540555A JP6745887B2 JP 6745887 B2 JP6745887 B2 JP 6745887B2 JP 2018540555 A JP2018540555 A JP 2018540555A JP 2018540555 A JP2018540555 A JP 2018540555A JP 6745887 B2 JP6745887 B2 JP 6745887B2
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- 125000000217 alkyl group Chemical group 0.000 description 6
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- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 description 4
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- CIXGGXXZVDVBBY-UHFFFAOYSA-N trichloro(chlorosilyloxy)silane Chemical compound Cl[SiH2]O[Si](Cl)(Cl)Cl CIXGGXXZVDVBBY-UHFFFAOYSA-N 0.000 description 1
- LXEXBJXDGVGRAR-UHFFFAOYSA-N trichloro(trichlorosilyl)silane Chemical compound Cl[Si](Cl)(Cl)[Si](Cl)(Cl)Cl LXEXBJXDGVGRAR-UHFFFAOYSA-N 0.000 description 1
- QHAHOIWVGZZELU-UHFFFAOYSA-N trichloro(trichlorosilyloxy)silane Chemical compound Cl[Si](Cl)(Cl)O[Si](Cl)(Cl)Cl QHAHOIWVGZZELU-UHFFFAOYSA-N 0.000 description 1
- UHUUYVZLXJHWDV-UHFFFAOYSA-N trimethyl(methylsilyloxy)silane Chemical compound C[SiH2]O[Si](C)(C)C UHUUYVZLXJHWDV-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
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- 239000010937 tungsten Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- H01L21/02104—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
- H01L21/02263—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
- 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
-
- 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
- C23C16/45563—Gas nozzles
- C23C16/45565—Shower nozzles
-
- 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
- C23C16/22—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
- C23C16/40—Oxides
- C23C16/401—Oxides containing silicon
-
- 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
-
- 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
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45544—Atomic layer deposition [ALD] characterized by the apparatus
- C23C16/45546—Atomic layer deposition [ALD] characterized by the apparatus specially adapted for a substrate stack in the ALD reactor
-
- 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
- C23C16/45563—Gas nozzles
- C23C16/45578—Elongated nozzles, tubes with holes
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- C—CHEMISTRY; METALLURGY
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Description
(a)第1温度とした基板に対して酸素含有ガスを非供給としつつ水素ガスを供給する工程と、
(b)前記基板に対して酸素含有ガスを非供給としつつ水素ガスを供給した状態で、前記基板の温度を前記第1温度から前記第1温度よりも高い第2温度に変更する工程と、
(c)前記基板の温度を前記第2温度に維持した状態で、前記基板に対して原料ガスを供給する工程と、前記基板に対して水素含有ガスを非供給としつつ酸素含有ガスを供給する工程と、を交互に繰り返すことで、(a)(b)実施後の前記基板上に酸化膜を形成する工程と、
を有する技術が提供される。
以下、本発明の一実施形態について、図1〜図3を用いて説明する。
図1に示すように、処理炉202は加熱手段(加熱機構)としてのヒータ207を有する。ヒータ207は円筒形状であり、保持板に支持されることにより垂直に据え付けられている。ヒータ207は、ガスを熱で活性化(励起)させる活性化機構(励起部)としても機能する。
上述の基板処理装置を用い、半導体装置の製造工程の一工程として、基板としてのウエハ200上に、シリコン酸化膜(SiO膜)を形成するシーケンス例について、図4を用いて説明する。以下の説明において、基板処理装置を構成する各部の動作はコントローラ121により制御される。
第1温度としたウエハ200に対してO2ガスを非供給としつつH2ガスを供給するステップAと、
ウエハ200に対してO2ガスを非供給としつつH2ガスを供給した状態で、ウエハ200の温度を第1温度から第1温度よりも高い第2温度に変更するステップBと、
ウエハ200の温度を第2温度に維持した状態で、ウエハ200に対してOMCTSガスを供給するステップ1と、ウエハ200に対してH2ガスのような水素(H)含有ガスを非供給としつつO2ガスを供給するステップ2と、を交互に繰り返すことで、上述のステップA,Bを実施した後のウエハ200上にSiO膜を形成するステップCと、
を実施する。本明細書では、図4に示す成膜シーケンスを、便宜上、以下のように示すこともある。以下の変形例等の説明においても、同様の表記を用いることとする。
複数枚のウエハ200がボート217に装填(ウエハチャージ)される。その後、図1に示すように、複数枚のウエハ200を支持したボート217は、ボートエレベータ115によって持ち上げられて処理室201内へ搬入(ボートロード)される。この状態で、シールキャップ219は、Oリング220を介して反応管203の下端をシールした状態となる。ボートロードを行う前に、ガス供給管232c,232dのそれぞれから、処理室201内へN2ガスを供給し、処理室201内をN2ガスによってパージして、処理室201内からO2ガスを除去しておく。但し、ウエハ200の表面は、処理室201内へ搬入されるまでの間に大気に暴露されることで、ヒドロキシ基(OH基)によって終端された状態、すなわち、OH終端された状態となっている。なお、処理室201内へのN2ガスの供給は、ボートロード前から後述するボートアンロードが終了するまで継続して行われる。
処理室201内、すなわち、ウエハ200が存在する空間が後述する第1圧力(トリートメント開始圧力)となるように、真空ポンプ246によって処理室201内が真空排気(減圧排気)される。この際、処理室201内の圧力は圧力センサ245で測定され、この測定された圧力情報に基づきAPCバルブ244がフィードバック制御される。また、処理室201内のウエハ200が後述する第1温度(トリートメント開始温度)となるようにヒータ207によって加熱される。この際、処理室201内が所望の温度分布となるように、温度センサ263が検出した温度情報に基づきヒータ207への通電具合がフィードバック制御される。また、回転機構267によるウエハ200の回転を開始する。処理室201内の排気、ウエハ200の加熱および回転は、いずれも、少なくともウエハ200に対する処理が終了するまでの間は継続して行われる。
処理室201内の圧力が第1圧力となり、ウエハ200の温度が第1温度となって安定したら、これらをそれぞれ維持しながら、ウエハ200に対してO2ガスを非供給としつつH2ガスを供給する。
ステップAを実施し、ウエハ200の表面全域をH終端化させたら、ウエハ200に対してO2ガスを非供給としつつH2ガスを供給した状態で、ヒータ207の出力を調整し、ウエハ200の温度を第1温度から第1温度よりも高い第2温度(成膜温度)へ変更する。
ウエハ200の温度が第2温度へ到達したら、少なくともウエハ200の温度が安定するまでの間、ウエハ200に対するH2ガスの供給を維持しながら所定時間待機する(温度安定化)。待機する間、H2ガスの供給を停止することなく継続することにより、処理室201内等に酸素成分が僅かに残留していた場合にこの残留酸素成分がウエハ200の表面と反応することを回避することが可能となる。なお、ウエハ200の温度は、少なくとも後述するステップCが終了するまでは第2温度に維持する。
ウエハ200の温度が第2温度で安定し、処理室201内のプリパージが完了したら、次のステップ1,2を実施する。
このステップでは、処理室201内のウエハ200に対してOMCTSガスを供給する。
ステップ1が終了した後、処理室201内のウエハ200に対してH2ガスのようなH含有ガスを非供給としつつO2ガスを供給する。
上述したステップ1,2を交互に所定回数(n回)繰り返すことにより、ウエハ200上に、所定膜厚のSiO膜を形成することができる。上述のサイクルは複数回繰り返すのが好ましい。すなわち、上述のサイクルを1回行う際に形成される第2層の厚さを所望の膜厚よりも小さくし、第2層を積層することで形成されるSiO膜の膜厚が所望の膜厚になるまで、上述のサイクルを複数回繰り返すのが好ましい。
SiO膜の形成が完了したら、APCバルブ244は開いたままとして、真空ポンプ246により処理室201内を真空排気し、処理室201内に残留する処理ガスを処理室201内から排除する。また、このとき、バルブ243c,243dは開いたままとして、処理室201内へのパージガスとしてのN2ガスを供給する。これにより、処理室201内が不活性ガスでパージされ、処理室201内に残留するガスや反応副生成物が処理室201内から除去される(アフターパージ)。その後、処理室201内のウエハ200が所定の第3温度(搬出温度)となるように降温させられ(降温)、処理室201内の雰囲気が不活性ガスに置換され(不活性ガス置換)、処理室201内の圧力が常圧に復帰される(大気圧復帰)。
ボートエレベータ115によりシールキャップ219が下降され、反応管203の下端が開口される。そして、処理済のウエハ200が、ボート217に支持された状態で、反応管203の下端から反応管203の外部に搬出される(ボートアンロード)。処理済のウエハ200は、ボート217より取出される(ウエハディスチャージ)。
本実施形態によれば、以下に示す1つ又は複数の効果が得られる。
本実施形態における成膜処理は、以下に示す変形例のように変更することができる。これらの変形例は、任意に組み合わせることができる。
図4に示す成膜シーケンスでは、ステップA,Bのそれぞれにおいて、ウエハ200に対して熱励起させたH2ガスを供給する例について説明した。しかしながら、本実施形態はこのような態様に限定されない。例えば、これらのステップのうち少なくともいずれかのステップでは、ウエハ200に対して、熱励起させたH2ガスの代わりにプラズマ励起させたH2ガス(H2 *)を供給するようにしてもよい。H2 *の方が、熱励起させたH2ガスよりもエネルギーが高いことから、このようにすることで、上述のトリートメント効果がより確実に得られ、ウエハ200の表面の酸化をより確実に回避することが可能となる場合がある。
図4に示す成膜シーケンスでは、ウエハ200に対するH2ガスの供給を、ステップBの開始よりも先に、すなわち、ウエハ200の温度を第1温度からさらに上昇させるタイミングよりも先に開始する例について説明した。しかしながら、本実施形態はこのような態様に限定されない。例えば、ウエハ200に対するH2ガスの供給を、上述のタイミングと同時に開始するようにしてもよく、また、上述のタイミングよりも後に開始するようにしてもよい。また、ウエハ200に対するH2ガスの供給を、ウエハ200の温度が第1温度に到達した直後から、その安定化を待たずに開始してもよい。
図4に示す成膜シーケンスでは、ウエハ200の温度が第2温度に到達した後もH2ガスの供給を所定時間継続する例について説明した。しかしながら、本実施形態はこのような態様に限定されない。例えば、ウエハ200に対するH2ガスの供給を、ウエハ200の温度が第2温度に到達するのと同時に停止してもよい。また例えば、ウエハ200に対するH2ガスの供給を、ウエハ200の温度が第2温度に到達する前に停止してもよい。
反応体として、例えば、プロピレン(C3H6)ガスのようなC含有ガス(炭化水素ガス)や、アンモニア(NH3)ガスのようなN含有ガス(窒化剤、窒化水素ガス)や、トリエチルアミン((C2H5)3N、略称:TEA)ガスのようなCおよびN含有ガス(アミン系ガス)を用い、以下に示す成膜シーケンスにより、ウエハ200上に、シリコン酸窒化膜(SiON膜)、シリコン酸炭窒化膜(SiOCN膜)、シリコン酸炭化膜(SiOC膜)を形成するようにしてもよい。
H2→(OMCTS→C3H6→NH3→O2)×n ⇒ SiOCN
H2→(OMCTS→TEA→O2)×n ⇒ SiOC(N)
以上、本発明の実施形態を具体的に説明した。しかしながら、本発明は上述の実施形態に限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能である。
サンプル1 ・・・ H2→(OMCTS→O2)×n ⇒ SiO
サンプル2 ・・・ N2→(OMCTS→O2)×n ⇒ SiO
サンプル3 ・・・ N2→(OMCTS→O2+H2)×n ⇒ SiO
Claims (14)
- (a)第1温度とした基板に対して酸素含有ガスを非供給としつつ水素ガスを供給する工程と、
(b)前記基板に対して酸素含有ガスを非供給としつつ水素ガスを供給した状態で、前記基板の温度を前記第1温度から前記第1温度よりも高い第2温度に変更する工程と、
(c)前記基板の温度を前記第2温度に維持した状態で、前記基板に対して原料ガスを供給する工程と、前記基板に対して水素含有ガスを非供給としつつ酸素含有ガスを供給する工程と、を交互に繰り返すことで、(a)(b)実施後の前記基板上に酸化膜を形成する工程と、
を有し、
(a)(b)では、前記基板の表面に存在するヒドロキシ基同士が反応する前に、前記基板の表面のヒドロキシ終端を水素終端に置き換える半導体装置の製造方法。 - 前記第1温度は前記基板の表面に存在するヒドロキシ基同士が反応しない温度である請求項1に記載の半導体装置の製造方法。
- 前記第1温度は前記基板の表面に存在するヒドロキシ基同士の反応によりH2Oが生成されない温度である請求項1または2に記載の半導体装置の製造方法。
- 前記第1温度は前記基板の表面に存在するヒドロキシ基に起因して前記基板の表面が酸化されない温度である請求項1〜3のいずれか1項に記載の半導体装置の製造方法。
- 前記第1温度は200℃以上500℃以下である請求項1〜4のいずれか1項に記載の半導体装置の製造方法。
- (a)(b)では、前記基板の表面のヒドロキシ終端を水素終端に置き換える請求項1〜5のいずれか1項に記載の半導体装置の製造方法。
- (a)(b)では、前記基板に対して、熱励起させた水素ガスまたはプラズマ励起させた水素ガスを供給する請求項1〜6のいずれか1項に記載の半導体装置の製造方法。
- 前記酸素含有ガスは、酸素ガスまたは酸化窒素ガスを含む請求項1〜7のいずれか1項に記載の半導体装置の製造方法。
- 前記原料ガスは、シロキサン化合物またはシラザン化合物を含む請求項1〜8のいずれか1項に記載の半導体装置の製造方法。
- 前記原料ガスは、環状構造を有するシロキサン化合物または環状構造を有するシラザン化合物を含む請求項1〜8のいずれか1項に記載の半導体装置の製造方法。
- 前記第2温度は600℃以上1000℃以下である請求項1〜10のいずれか1項に記載の半導体装置の製造方法。
- (b)で前記基板の温度が前記第2温度に達した後、少なくとも(c)が終了するまでは、前記基板の温度を前記第2温度に維持する請求項1〜11のいずれか1項に記載の半導体装置の製造方法。
- 基板に対して処理が行われる処理室と、
前記処理室内へ水素ガスを供給する水素ガス供給系と、
前記処理室内へ原料ガスを供給する原料ガス供給系と、
前記処理室内へ酸素含有ガスを供給する酸素含有ガス供給系と、
前記処理室内の基板を加熱するヒータと、
前記処理室内において、
(a)第1温度とした基板に対して酸素含有ガスを非供給としつつ水素ガスを供給する処理と、
(b)前記基板に対して酸素含有ガスを非供給としつつ水素ガスを供給した状態で、前記基板の温度を前記第1温度から前記第1温度よりも高い第2温度に変更する処理と、
(c)前記基板の温度を前記第2温度に維持した状態で、前記基板に対して前記原料ガスを供給する処理と、前記基板に対して水素含有ガスを非供給としつつ前記酸素含有ガスを供給する処理と、を交互に繰り返すことで、(a)(b)実施後の前記基板上に酸化膜を形成する処理と、
を行わせ、
(a)(b)では、前記基板の表面に存在するヒドロキシ基同士が反応する前に、前記基板の表面のヒドロキシ終端を水素終端に置き換えるように、前記水素ガス供給系、前記原料ガス供給系、前記酸素含有ガス供給系、および前記ヒータを制御するよう構成される制御部と、
を有する基板処理装置。 - (a)基板処理装置の処理室内の第1温度とした基板に対して酸素含有ガスを非供給としつつ水素ガスを供給する手順と、
(b)前記処理室内の前記基板に対して酸素含有ガスを非供給としつつ水素ガスを供給した状態で、前記基板の温度を前記第1温度から前記第1温度よりも高い第2温度に変更する手順と、
(c)前記処理室内の前記基板の温度を前記第2温度に維持した状態で、前記基板に対して原料ガスを供給する手順と、前記基板に対して水素含有ガスを非供給としつつ酸素含有ガスを供給する手順と、を交互に繰り返すことで、(a)(b)実施後の前記基板上に酸化膜を形成する手順と、
(a)(b)において、前記基板の表面に存在するヒドロキシ基同士が反応する前に、前記基板の表面のヒドロキシ終端を水素終端に置き換える手順と、
をコンピュータによって前記基板処理装置に実行させるプログラム。
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