JP6390977B2 - 薄膜堆積反応器及び薄膜層をインサイチューで乾式浄化するプロセス及び方法 - Google Patents
薄膜堆積反応器及び薄膜層をインサイチューで乾式浄化するプロセス及び方法 Download PDFInfo
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- 229910052785 arsenic Inorganic materials 0.000 description 1
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- 238000009835 boiling Methods 0.000 description 1
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- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
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- 239000012433 hydrogen halide Substances 0.000 description 1
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- APHGZSBLRQFRCA-UHFFFAOYSA-M indium(1+);chloride Chemical compound [In]Cl APHGZSBLRQFRCA-UHFFFAOYSA-M 0.000 description 1
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- 150000002825 nitriles Chemical class 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
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- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
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- 230000002085 persistent effect Effects 0.000 description 1
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- 229910052707 ruthenium Inorganic materials 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
- 239000007858 starting material Substances 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 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
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- 229910052726 zirconium Inorganic materials 0.000 description 1
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Classifications
-
- 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
- C23C16/4401—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber
- C23C16/4405—Cleaning of reactor or parts inside the reactor by using reactive gases
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/56—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks
- C23C14/564—Means for minimising impurities in the coating chamber such as dust, moisture, residual gases
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
-
- 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
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02046—Dry cleaning only
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Drying Of Semiconductors (AREA)
- Chemical Vapour Deposition (AREA)
Description
Ga2O3 + 3 SOBr2 → 2 GaBr3 + 3 SO2
2Ga2O3 + 6 SOBrCl → GaClBr2 + GaBrCl2 + GaCl3 + GaBr3 + 6SO2
Ga2O3 + 3 NOBr → GaBr3 + 3 NO2
In2O3 + 3 COCl2 → 2 InCl3 + 3 CO2
被覆された基板32を第1の基板ホルダー28に置いた。ガス入口20及び直結入口バルブ21から反応器槽27を通る連続搬送ガス(Ar)流の下で、IRヒーター31を用いて基板32を200℃に加熱した。基板が200℃の温度に達したら、SOCl2がエッチャントガスを形成する搬送ガスに拾い上げられるように、搬送ガスの流れを、バブラーバルブ22を通して試薬24(SOCl2)を含むバブラー23へ転換した。エッチャントガスはバルブ25を通って反応器槽27に入り、基板32を通り、ステンレス鋼基板32上の堆積をエッチングした。反応は最初の5分にわたって非常に高速で、次いで、よりゆっくり進み、その結果、エッチングプロセスは10−13分を要して、基板を輝きのあるステンレス状態に浄化した。副生物は、主としてGaCl3及びSO2であるが、槽27の冷却した領域37で収集した。
被覆された基板32を第1の基板ホルダー28に置いた。ガス入口20及び直結入口バルブ21から反応器槽27を通る連続搬送ガス(Ar)流の下で、IRヒーター31を用いて基板32を200℃に加熱した。基板が200℃に達したら、SOBr2がエッチャントガスを生成する搬送ガスに拾い上げられるように、搬送ガスの流れを、バブラーバルブ22を通して試薬24(SOBr2)を含むバブラー23へ転換した。エッチャントガスはバルブ25を通して反応器槽27に入り、基板32を通り、ステンレス鋼基板32上の堆積をエッチングした。この反応は、非常に迅速で効率的であり、7−9分以内に完全に基板を浄化した。副生物は、主としてGaBr3及びSO2であるが、槽27の冷却した領域37で収集した。
被覆した基材32を第1の基板ホルダー28に置いた。ガス入口20及び直結入口バルブ21から反応器槽27を通る連続搬送ガス(Ar)流の下で、IRヒーター31を用いて基板32を200℃に加熱した。第2の基板ホルダー30を、IRヒーター31を用いて300℃に加熱した。好適な温度に達したら、SOBr2が搬送ガスに拾い上げられるように、搬送ガスの流れを、バブラーバルブ22を通して試薬24(SOBr2)を含むバブラー23へ転換し、エッチャントガスが生成した。エッチャントガスは、バルブ25を通して反応器槽27に入り、基板ホルダー30を通るときに熱により活性化され、基板32を通り、ステンレス鋼基板32上の堆積をエッチングした。この反応は、非常に迅速で効率的であり、3−5分以内に完全に基板を浄化した。副生物は、主としてGaBr3及びSO2であるが、槽27の冷却した領域37で収集した。
被覆された基板32を第1の基板ホルダー28に置いた。ガス入口20及び直結入口バルブ21から反応器槽27を通る連続搬送ガス(Ar)流の下で、IRヒーター31を用いて基板32を200℃に加熱した。基板が200℃に達したら、SOClBrがエッチャントガスを生成する搬送ガスに拾い上げられるように、搬送ガスの流れを、バブラーバルブ22を通して試薬24(SSOClBr)を含むバブラー23へ転換した。エッチャントガスはバルブ25を通して反応器槽27に入り、基板32を通り、ステンレス鋼基板32上の堆積をエッチングした。この反応は、迅速で効率的であり、3−5分以内に完全に基板を浄化した。副生物は、主としてGaClBr2、GaBrCl2、GaBr3、GaCl3及びSO2であるが、槽27の冷却した領域37で収集した。
被覆された基板32を第1の基板ホルダー28に置いた。ガス入口20及び直結入口バルブ21から反応器槽27を通る連続搬送ガス(Ar)流の下で、IRヒーター31を用いて基板32を250℃に加熱した。第2の基板ホルダー30を、IRヒーター31を用いて300℃に加熱した。好適な温度に達したら、SOBr2/Br2が搬送ガスに拾い上げられるように、搬送ガスの流れを、バブラーバルブ22を通して試薬24(SOBr2及び5体積%のBr2))を含むバブラー23へ転換し、エッチャントガスが生成した。エッチャントガスは、バルブ25を通して反応器槽27に入り、基板ホルダー30を通るときに熱により活性化され、基板32を通り、ステンレス鋼基板32上の堆積をエッチングした。この反応は、非常に迅速で効率的であり、5−6分以内に完全に基板を浄化した。副生物は、主としてGaBr3及びSO2であるが、槽27の冷却した領域37で収集した。
被覆された基板32を第1の基板ホルダー28に置いた。ガス入口20及び直結入口バルブ21から反応器槽27を通る連続搬送ガス(Ar)流の下で、IRヒーター31を用いて基板32を200℃に加熱した。好適な温度に達したら、SOBr2及びBr2が搬送ガス流に拾い上げられるように、ガスの流れを、バブラーバルブ38を通して試薬40(SOBr2)を含むバブラー39へ、及びバブラーバルブ42を通して試薬44(Br2)を含むバブラー43へ転換した。SOBr2及びBr2を含有するガスは、それぞれバルブ41及び45を通って出、反応器槽27に入る前に合わせてエッチャントガスを形成した。エッチャントガスは基板32を通り、ステンレス鋼基板32上の堆積をエッチングした。エッチングプロセスはほとんどの被膜を基板から除去したが、灰色がかったオレンジ色の条痕の執拗な膜が、15分間のエッチング後も基板に残存した。副生物は、主としてGaBr3及びSO2であるが、槽27の冷却した領域37で収集した。
被覆された基板32を第1の基板ホルダー28に置いた。ガス入口20及び直結入口バルブ21から反応器槽27を通る連続搬送ガス(Ar)流の下で、IRヒーター31を用いて基板32を200℃に加熱した。好適な温度に達したら、SOBr2及びMeBr(SOBr2と比較して約4−6%)が搬送ガス流に拾い上げられるように、ガスの流れを、バブラーバルブ38を通して試薬40(SOBr2)を含むバブラー39へ、及びバブラーバルブ42を通して試薬44(MeBr)を含むバブラー43へ転換した。SOBr2及びMeBrを含有するガスは、それぞれバルブ41及び45を通って出、反応器槽27に入る前に合わせてエッチャントガスを形成した。エッチャントガスは基板32を通り、ステンレス鋼基板32上の堆積をおよそ6分で完全にエッチングした。副生物は、主としてGaBr3、MeGaBr2、Me2GaBr及びSO2であるが、槽27の冷却した領域37で収集した。
被覆された基板32を第1の基板ホルダー28に置いた。ガス入口20及び直結入口バルブ21から反応器槽27を通る連続搬送ガス(Ar)流の下で、IRヒーター31を用いて基板32を150℃に加熱する。基板が150℃に達したら、SOCl2がガスに拾い上げられるように、ガスの流れを、バブラーバルブ22を通して試薬24(SOCl2)を含むバブラー23へ転換した。SOCl2はバルブ25を通ってバブラーを出、活性化槽46を通り、次いで、反応槽27に入り、そこで基板32を通り、ステンレス鋼基板32上の堆積をエッチングした。この反応は、非常に迅速で効率的であり、3−5分以内に完全に基板を浄化した。副生物は、主としてGaCl3及びSO2であるが、槽27の冷却した領域37で収集した。
被覆された基板32を第1の基板ホルダー28に置いた。ガス入口20及び直結入口バルブ21から反応器槽27を通る連続ガス(Ar)流の下で、IRヒーター31を用いて基板32を200℃に加熱した。第2の基板ホルダー30を、IRヒーター31を用いて300℃に加熱した。好適な温度に達したら、バルブ21を閉じることにより搬送ガスの流れを停止し、続けてバルブ48及び50を開け、エッチャントガス(Br2及びCO; COと比較して約5%のBr2)を合わせて反応器槽27に入れた。エッチャントガスの組み合わせは、基板ホルダー30を越えて加熱領域を通るときに熱により活性化された。活性化されたガスが基板32を通ったとき、基板32上の被膜のかなりの部分がエッチングされたが、非常にかすかな膜が表面に残存した。副生物は、主としてGaBr3及びCO2であるが、槽27の冷却した領域37で収集した。
Claims (25)
- III−V族半導体の薄膜堆積用の化学反応器槽の内表面、および前記化学反応器槽内の基板に堆積した反応生成物を除去する方法であって、
反応器槽を少なくとも200℃の高温に加熱する工程;
一般式AOmXn[式中、Aは、N及びSからなる群から選択され;Oは酸素であり;Xはハロゲンであり;下付き添字m及びnは0を超える]であるエッチャントガスを前記反応器槽に導入する工程;
前記導入の前又は後に前記エッチャントガスを活性化する工程;
前記エッチャントガスと前記反応生成物の間でエッチング反応を進めて、前記反応器槽内のエッチング反応で生成される副生成物の再堆積なく前記反応生成物を除去する工程;及び
前記エッチング反応の副生成物と一緒に前記エッチャントガスを排気する工程を含み、
前記エッチング反応中に前記反応器槽内の圧力を20mBarから1000mBarの間とし、前記反応器槽の温度を少なくとも200℃とすることによって、前記反応器槽内のエッチング反応の副生成物の前記反応器槽内への再堆積をなくすることを特徴とする方法。 - 前記反応器槽への前記導入前に前記エッチャントガスを発生させるさらなる工程を含む、請求項1に記載の方法。
- 前記反応器槽への前記エッチャントガスの前記導入前に、搬送ガスを液体化学的成分に通して泡立たせて前記液体化学的成分を前記エッチャントに揮発させるさらなる工程を含む、請求項1に記載の方法。
- 複数の液体化学的成分に通して搬送ガスを泡立たせ、次いで、結果として得られたガスを合わせることにより前記エッチャントガスを発生させる、請求項2に記載の方法。
- 2種以上の化学的成分ガスを混合することにより前記エッチャントガスを発生させる、請求項2に記載の方法。
- 前記反応器槽への導入前に、加熱、紫外線及びプラズマ放電からなる群から選択される、ガス活性化槽中の活性化機構に前記エッチャントガスを曝露することによってそれを活性化させる、請求項1に記載の方法。
- 前記反応器槽への導入後に、前記反応器槽内の全体加熱及び前記反応器槽内の局所熱源からなる群から選択される熱活性化機構に前記エッチャントガスを曝露することによってそれを活性化する、請求項1に記載の方法。
- 前記エッチャントガスが一般式RX
[式中、Rは、H及びMeからなる群から選択され;
XはF、Cl、Br及びIからなる群から選択される。]の添加剤をさらに含む、請求項1に記載の方法。 - 前記エッチャントガスがまたハロゲンガス添加剤を含む、請求項1に記載の方法。
- III−V族半導体の薄膜堆積用の化学反応器槽の内表面、および前記化学反応器槽内の基板に堆積した反応生成物を除去する方法であって、
反応器槽を少なくとも100℃の高温に加熱する工程;
一般式AOmXnYp[式中、Aは、N及びSからなる群から選択され;Oは酸素であり;X及びYは相異なるハロゲンであり;下付き添字m、n及びpは0を超える]であるエッチャントガスを前記反応器槽に導入する工程;
前記導入の前又は後に前記エッチャントガスを活性化する工程;
前記エッチャントガスと前記反応生成物の間でエッチング反応を進めて、前記反応器槽内のエッチング反応で生成される副生成物の再堆積なく前記反応生成物を除去する工程;及び
前記エッチング反応の副生成物と一緒に前記エッチャントガスを排気する工程を含み、
前記エッチング反応中に前記反応器槽内の圧力を20mBarから1000mBarの間とし、前記反応器槽の温度を少なくとも200℃とすることによって、前記反応器槽内のエッチング反応の副生成物の前記反応器槽内への再堆積をなくすることを特徴とする方法。 - 前記反応器槽への前記導入前に前記エッチャントガスを発生させるさらなる工程を含む、請求項10に記載の方法。
- 前記反応器槽への前記エッチャントガスの前記導入前に、液体化学成分に通して搬送ガスを泡立たせて前記液体化学成分を前記エッチャントに揮発させるさらなる工程を含む、請求項10に記載の方法。
- 複数の液体化学的成分に通して搬送ガスを泡立たせ、次いで、結果として得られたガスを合わせることにより前記エッチャントガスを発生させる、請求項11に記載の方法。
- 2種以上の化学的成分ガスを混合することにより前記エッチャントガスを発生させる、請求項11に記載の方法。
- 前期反応器槽への導入前に、加熱、紫外線及びプラズマ放電からなる群から選択される、ガス活性化槽中の活性化機構に前記エッチャントガスを曝露することによってそれを活性化させる、請求項10に記載の方法。
- 前記反応器槽への導入後に、前記反応器槽内の全体加熱及び前記反応器槽内の局所熱源からなる群から選択される熱活性化機構に前記エッチャントガスを曝露することによってそれを活性化させる、請求項10に記載の方法。
- 前記エッチャントガスが一般式RX
[式中、Rは、H及びMeからなる群から選択され;
XはF、Cl、Br及びIからなる群から選択される。]の添加剤をさらに含む、請求項10に記載の方法。 - 前記エッチャントガスがまたハロゲンガス添加剤を含む、請求項10に記載の方法。
- 前記圧力を500mBarから1000mBarの間とする、請求項1又は10に記載の方法。
- 前記高温を200℃から400℃の間とする、請求項1又は10に記載の方法。
- 前記高温を250℃から400℃の間とする、請求項1又は10に記載の方法。
- 前記エッチング反応中、前記温度を一定とする、請求項1又は10に記載の方法。
- 前記エッチング反応中、前記圧力を一定とする、請求項1又は10に記載の方法。
- 前記反応生成物が金属酸化物を含む、請求項1又は10に記載の方法。
- 前記反応生成物が酸化ガリウムを含む、請求項1又は10に記載の方法。
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US20150218695A1 (en) | 2015-08-06 |
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