JP4965247B2 - 促進されたaldプロセス - Google Patents
促進されたaldプロセス Download PDFInfo
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- JP4965247B2 JP4965247B2 JP2006509000A JP2006509000A JP4965247B2 JP 4965247 B2 JP4965247 B2 JP 4965247B2 JP 2006509000 A JP2006509000 A JP 2006509000A JP 2006509000 A JP2006509000 A JP 2006509000A JP 4965247 B2 JP4965247 B2 JP 4965247B2
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Classifications
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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
- C23C16/45525—Atomic layer deposition [ALD]
-
- 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]
- C23C16/45527—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
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- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Vapour Deposition (AREA)
- Formation Of Insulating Films (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Description
本出願は、2003年3月23日に出願された「Transient Enhanced ALD」という名称の米国仮特許出願第60/465,143号に関し、その優先権の利益を主張する。
FDR(Å/秒)〜Rmx[1−exp(−tm/τm)][1−exp(−tnm/τnm)]/(tm+tnm+tpurges) (1)
ここで、tmは金属前駆体の露光時間(秒)であり、tnmは非金属前駆体の露光時間(秒)である。Rmxは形成される化合物についての最大飽和堆積レート(Å/サイクル)である。τmは、金属の半反応の飽和のための時定数であり、τnmは非金属の時定数である。両者は、指数関数的またはラングミュア形態を使用して、実際のALD飽和挙動を近似するのに使用される。量tm、tnm、tpurgesは秒単位である。
FDR(Å/秒)〜Rmx[1−exp(−tnm/τnm)]/(tm+tnm) (2)
に単純化される。
・ 最大飽和ではないが、不足状態の半反応は、有益な膜を形成するのに明らかに十分適する(H2O飽和は完全ではないが、Al2O3が得られる)。
・ ALD堆積レートは可能な最大より小さいが、標準ALDをはるかに超える堆積レートが得られる。例えば、(寄生CVDを回避するための)各前駆体の長い露光と長いパージについてのALD堆積レートは、約10〜20Å/分であるが、STAR−ALDについての堆積レートはこれらの値の約10倍である。
・ たとえ精巧な気体分散システムが使用されなくても、均一性は、達成するのが比較的容易であった。このことは、圧力と流量パラメータを最適にすることによって、金属半反応についての不足状態の飽和(すなわち、飽和の非最大値)が、ウェハにわたって均一にされる可能性があることを意味する。
・ 前駆体が不足状態であることは、過剰の前駆体が非常に制限され、寄生CVDが減少し、抑制されることを意味する。先に報告した調査におけるゼロパージ時間の使用は、これを支持する。簡単に述べると、前駆体が投与不足である場合、寄生CVD反応に関与する過剰な前駆体がほとんどないため、低い、また、さらにゼロのパージプロセスが可能である。
Claims (9)
- 単位時間当たりの膜厚により決定される最大膜堆積レートを達成する促進されたALDプロセスであって、
このプロセスは、ウェハに第1の化学的に反応する前駆体のドーズ量の曝露をし、この第1の化学的に反応する前駆体は、前駆体の曝露するドーズ量を増加してもALD成長レートの増加がない状態にするために必要な時間である飽和時間が、前記第1の化学的に反応する前駆体に続く第2の化学的に反応する前駆体と比較してより長く、前記第1の化学的に反応する前駆体のドーズ量は、両前駆体曝露ドーズ量がこれら二つの前駆体の飽和を達成するALD堆積レートである最大可能な飽和堆積レートに必要なドーズ量より少ない未飽和のドーズ量であり、そして前記第1の化学的に反応する前駆体は、ウェハ上に膜を得るように送出され、そして
ウェハに第2の化学的に反応する前駆体のドーズ量を曝露し、前記第1と第2の化学的に反応する前駆体の個々のドーズ量の組み合わせが、第2の化学的に反応する前駆体のための前記最大可能な飽和堆積レートより少ない前記第2の前駆体のための飽和堆積レートを起こすように選択され、この飽和堆積レートはALDサイクル毎の膜厚で測定され、そして前記第2の化学的に反応する前駆体のドーズ量が増加しても一定であり、
そして前記第1と第2の化学的に反応する前駆体は順次送出されるALDプロセス。 - 前記ウェハは、前記第1の化学的に反応する前駆体のドーズ量の曝露に続いてパージすることなく、前記第2の化学的に反応する前駆体のドーズ量が曝露される請求項1に記載のALDプロセス。
- 前記ウェハは、前記第2の化学的に反応する前駆体のドーズ量の曝露に続いてパージすることなく、前記第1の化学的に反応する前駆体のドーズ量が再び曝露される請求項1に記載のALDプロセス。
- パージが、前記第1の化学的に反応する前駆体のドーズ量へのウェハの曝露に続いて実施される請求項1に記載のALDプロセス。
- パージが、前記第2の化学的に反応する前駆体のドーズ量へのウェハの曝露に続いて実施される請求項1に記載のALDプロセス。
- 前記第1と第2の化学的に反応する前駆体のドーズの成分の一方はH20である水であり、他方は、トリメチルアルミニウムである請求項1に記載のALDプロセス。
- 前記第1および第2、又は前記第1または第2の化学的に反応する前駆体のドーズ量の一方または両方は、0.02秒〜2秒間に加えられる請求項1に記載のALDプロセス。
- 前記第1と第2の化学的に反応する前駆体のドーズ量は、前記ウェハ上に送出される請求項1に記載のALDプロセス。
- 前記ウェハ上に材料膜を形成するように、前記ウェハに前記第1と第2の化学的に反応する前駆体のドーズ量を交互に繰り返し曝露することをさらに含む請求項1に記載のALDプロセス。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US46514303P | 2003-04-23 | 2003-04-23 | |
US60/465,143 | 2003-04-23 | ||
PCT/US2004/006352 WO2004094695A2 (en) | 2003-04-23 | 2004-03-01 | Transient enhanced atomic layer deposition |
Related Child Applications (1)
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JP2011082561A Division JP2011171752A (ja) | 2003-04-23 | 2011-04-04 | 短時促進原子層堆積 |
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JP2006524434A JP2006524434A (ja) | 2006-10-26 |
JP4965247B2 true JP4965247B2 (ja) | 2012-07-04 |
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JP2006509000A Expired - Lifetime JP4965247B2 (ja) | 2003-04-23 | 2004-03-01 | 促進されたaldプロセス |
JP2011082561A Pending JP2011171752A (ja) | 2003-04-23 | 2011-04-04 | 短時促進原子層堆積 |
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JP2011082561A Pending JP2011171752A (ja) | 2003-04-23 | 2011-04-04 | 短時促進原子層堆積 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7981473B2 (ja) |
EP (1) | EP1616043B1 (ja) |
JP (2) | JP4965247B2 (ja) |
KR (1) | KR101191222B1 (ja) |
CN (2) | CN102191483B (ja) |
WO (1) | WO2004094695A2 (ja) |
Families Citing this family (63)
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CN1777697B (zh) | 2011-06-22 |
CN102191483A (zh) | 2011-09-21 |
WO2004094695A2 (en) | 2004-11-04 |
CN1777697A (zh) | 2006-05-24 |
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