JP2014042041A - 高速ガス切換能力を有するガス分配システム及びプラズマ処理装置 - Google Patents
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Abstract
【解決手段】ガス分配システムは第1及び第2のガスを切換部に連続的に供給することができ、切換部は、第1及び第2のガスのフローを切換えて、第1及び第2のプロセスガスの一方をチャンバに供給するとともに、第1及び第2のガスの他方をバイパス管路に供給し、次にガスフローを切換えるように、操作可能である。切換部は、好ましくは、どちらのガスのフローにも望ましくない圧力サージ又はフローの不安定性を生じさせることなく、迅速に開閉して、第1及び第2のガスを高速で切換えるように操作可能な高速切換バルブを含むのが好ましい。
【選択図】図1
Description
Claims (30)
- 第1のガス管路と流体連通するように適合された、第1のガス流路及び第2のガス流路と、
第2のガス管路と流体連通するように適合適応された、第3のガス流路及び第4のガス流路と、
前記第1のガス流路に沿って配置された第1の高速切換バルブと、
前記第2のガス流路に沿って配置された第2の高速切換バルブと、
前記第3のガス流路に沿って配置された第3の高速切換バルブと、
前記第4のガス流路に沿って配置された第4の高速切換バルブと、
を備えた、真空チャンバにガスを供給するガス分配システムであって、
前記第1及び第3のガス流路がガスを真空チャンバに供給するように適合され、かつ、前記第2及び第4のガス流路がガスをバイパス管路に供給するように適合され、
前記第1及び第4の高速切換バルブが、前記第2及び第3の高速切換バルブが閉じているときに、開く信号を受け取って、前記第1のガス管路並びに前記第1及び第3のガス流路を介して、第1のガスを前記真空チャンバに供給するとともに、前記第2のガス管路並びに前記第2及び第4のガス流路を介して、第2のガスを前記バイパス管路に供給するように適合され、
前記第2及び第3の高速切換バルブが、前記第1及び第4の高速切換バルブが閉じているときに、開く信号を受け取って、前記第2のガス管路及び前記第3のガス流路を介して、前記第2のガスを前記真空チャンバに供給するとともに、前記第1のガス管路及び前記第2のガス流路を介して、前記第1のガスを前記バイパス管路に供給するように適合されたことを特徴とするガス分配システム。 - 前記第1及び第2の高速切換バルブの上流にある前記第1のガス管路に沿って配置されるように適合された第1のフローレストリクタと、
前記第3及び第4の高速切換バルブの上流にある前記第2のガス流路に沿って配置されるように適合された第2のフローレストリクタと、
をさらに備え、
前記第1及び第2のフローレストリクタが、前記第1及び第2のフローレストリクタの上流にあってそれらに近接した前記第1及び第2のガス管路の領域内で、ほぼ一定のガス圧を維持するように適合されたことを特徴とする請求項1に記載のガス分配システム。 - 前記第1のガス流路が、前記第1のフローレストリクタと前記第1及び第2の高速切換バルブとの間で、約10cm3未満の容量を有し、前記第2のガス管路が、前記第2のフローレストリクタと前記第3及び第4の高速切換バルブとの間で、約10cm3未満の容量を有することを特徴とする請求項2に記載のガス分配システム。
- 前記第1の高速切換バルブの下流にある前記第1のガス流路に沿って配置されるように適合された第3のフローレストリクタと、
前記第2の高速切換バルブの下流にある前記第2のガス流路に沿って配置されるように適合された第4のフローレストリクタと、
前記第3の高速切換バルブの下流にある前記第3のガス流路に沿って配置されるように適合された第5のフローレストリクタと、
前記第4の高速切換バルブの下流にある前記第4のガス流路に沿って配置されるように適合された第6のフローレストリクタと、
をさらに備え、
前記第3、第4、第5及び第6のフローレストリクタが、前記第1、第2、第3、第4、第5及び第6のフローレストリクタそれぞれの上流にあってそれらに近接した前記第1、第2、第3及び第4のガス流路の領域内で、ほぼ一定のガス圧を維持するように適合されたことを特徴とする請求項1に記載のガス分配システム。 - 前記第1、第2、第3及び第4の高速切換バルブの開閉を制御するように操作可能なコントローラをさらに備えることを特徴とする請求項1に記載のガス分配システム。
- 前記第1、第2、第3及び第4の高速切換バルブが、信号を受け取ってから約100ミリ秒未満又は約50ミリ秒未満の期間内に、開く、かつ/又は、閉じることができることを特徴とする請求項1に記載のガス分配システム。
- シャワーヘッド電極アセンブリを含み、かつ、約1/2リットルから約4リットルの容量のプラズマ閉じ込め区画を有するプラズマ処理チャンバと、
前記プラズマ処理チャンバと流体連通している、請求項1に記載のガス分配システムと、
を備え、
前記ガス分配システムが、前記プラズマ区画内の前記第1のガス又は前記第2のガスを、約1秒未満又は約200ミリ秒未満の期間内に、前記第1のガス又は前記第2のガスの他方と実質的に置き換えることができることを特徴とするプラズマ処理装置。 - 互いにフローが絶縁された内側区画及び外側区画を有するガス分配部材を含むプラズマ処理チャンバにガスを供給するガス分配システムであって、
第1のプロセスガス源、前記プラズマ処理チャンバの前記ガス分配部材の前記内側区画及びバイパス管路と流体連通するように適合された第1のガス流路と、
前記第1のプロセスガス源、前記プラズマ処理チャンバの前記ガス分配部材の前記外側区画及び前記バイパス管路と流体連通するように適合された第2のガス流路と、
第2のプロセスガス源、前記内側区画及び前記バイパス管路と流体連通するように適合された第3のガス流路と、
前記第2のプロセスガス源、前記外側区画及び前記バイパス管路と流体連通するように適合された第4のガス流路と、
開閉信号を受け取って、(i)前記第1及び第2のガス流路を介して、前記第1のプロセスガスを前記内側及び外側区画に供給するとともに、前記第3及び第4のガス管路を介して、前記第2のプロセスガスを前記バイパス管路に供給し、かつ、(ii)前記第1及び第2のプロセスガスのフローを変更して、前記第3及び第4のガス流路を介して、前記第2のプロセスガスを前記内側及び外側区画に供給するとともに、前記第1及び第2のガス流路を介して、前記第1のプロセスガスを前記バイパス管路に供給するように適合された複数の高速切換バルブと、
を備えることを特徴とするガス分配システム。 - 前記第1、第2、第3及び第4のプロセスガス流路のそれぞれに沿って配置された、少なくとも1つのフローレストリクタをさらに備え、前記フローレストリクタが、前記フローレストリクタの上流にあってそれに近接した前記第1、第2、第3及び第4のガス流路の領域内のガス圧をほぼ一定に維持するように適合されたことを特徴とする請求項8に記載のガス分配システム。
- 前記高速切換バルブが、信号を受け取ってから約100ミリ秒未満又は50ミリ秒未満の期間内に、開く、かつ/又は、閉じることができることを特徴とする請求項8に記載のガス分配システム。
- 内側区画及び外側区画を有するシャワーヘッド電極アセンブリを含み、内部容積が約1/2リットルから4リットルであるプラズマ処理チャンバと、
前記シャワーヘッド電極アセンブリの前記内側区画及び外側区画と流体連通している、請求項8に記載のガス分配システムと、
を備え、
前記ガス分配システムが、前記プラズマ閉じ込め区画内の前記第1のプロセスガス又は前記第2のプロセスガスを、約1秒未満又は約200ミリ秒未満の期間内に、前記第1のプロセスガス又は前記第2のプロセスガスの他方と実質的に置き換えるように操作可能であることを特徴とするプラズマ処理装置。 - ガス切換部を備え、互いにフローが絶縁された内側区画及び外側区画を有するガス分配部材を含むプラズマ処理チャンバにプロセスガスを供給するガス分配システムであって、
それぞれが、(i)少なくとも1つの第1のガス流路及び/又は少なくとも1つの第2のガス流路と流体連通するように適合され、かつ、(ii)前記プラズマ処理チャンバの前記ガス分配部材の前記内側区画、前記プラズマ処理チャンバの前記ガス分配部材の前記外側区画、及び、バイパス管路の少なくとも1つと流体連通するように適合された、複数の第1のガス流路と、
信号を受け取って、(iii)高速切換バルブの第1群を開き、高速切換バルブの第2群を閉じて、第1のプロセスガスを前記内側区画及び外側区画に供給するとともに、前記第1のガス流路の第1群を介して、第2のプロセスガスを前記バイパス管路に誘導し、また、(iv)高速切換バルブの前記第1群を閉じ、高速切換バルブの前記第2群を開いて、前記第1及び第2のプロセスガスのフローを変更することにより、前記第2のプロセスガスを前記内側区画及び外側区画に供給するとともに、前記第1のガス流路の第2群を介して、前記第1のプロセスガスを前記バイパス管路に誘導するように適合された、高速切換バルブ構成と、を含むことを特徴とするガス分配システム。 - 高速切換バルブの前記第1群及び第2群の開閉を制御するように操作可能なコントローラをさらに備えることを特徴とする請求項12に記載のガス分配システム。
- フロー制御部をさらに備え、前記フロー制御部が、
少なくとも1つの第1のプロセスガス源と流体連通している第1のガス管路と流体連通するように適合された、少なくとも1つの第2のガス流路と、
前記第1のプロセスガスを前記第1のガス管路から少なくとも1つの第2のガス流路に供給されるように操作可能な、少なくとも1つの第1のバルブと、
少なくとも1つの第2のプロセスガス源と流体連通している第2のガス管路と流体連通するように適合された、少なくとも1つの第3のガス流路と、
前記第2のプロセスガスを前記第2のガス管路から少なくとも1つの第3のガス流路に供給するように操作可能な、少なくとも1つの第2のバルブと、
を備えることを特徴とする請求項12に記載のガス分配システム。 - ガス供給部をさらに備え、前記ガス供給部が、
複数の前記第1のプロセスガス源と流体連通するように適合された第1のガス管路と、
複数の前記第2のプロセスガス源と流体連通するように適合された第2のガス管路と、
前記第1のプロセスガスを前記第1及び第2のガス管路の少なくとも1つに供給するように操作可能な、少なくとも1つの第3のバルブと、
前記第2のプロセスガスを前記第1及び第2のガス管路の少なくとも1つに供給するように操作可能な、少なくとも1つの第4のバルブと、
を含むことを特徴とする請求項14に記載のガス分配システム。 - 前記フロー制御部が、前記第2及び第3のガス流路とそれぞれ流体連通している、少なくとも1つの第1のフローレストリクタ及び少なくとも1つの第2のフローレストリクタを含み、前記第1及び第2のフローレストリクタが、前記第1及び第2のフローレストリクタの上流にあってそれらに近接した領域において、ほぼ一定のガス圧を維持するように適合されたことを特徴とする請求項14に記載のガス分配システム。
- 前記少なくとも1つの第1のフローレストリクタが、少なくとも2つの第1のフローレストリクタを含み、前記少なくとも1つの第2のフローレストリクタが1つの第2のフローレストリクタを含み、また、少なくとも1つの第1のフローレストリクタが前記第2のフローレストリクタとは異なるフローコンダクタンスを有することを特徴とする請求項16に記載のガス分配システム。
- 前記第1のフローレストリクタが、前記第2のフローレストリクタのフローコンダクタンスとほぼ等しい合計フローコンダクタンスを有することを特徴とする請求項17に記載のガス分配システム。
- 前記第2及び第3のガス流路が、前記第2及び第3のガス流路の少なくとも1つに調整用ガスを供給するように操作可能な少なくとも1つの調整用ガス源と流体連通するように適合されたことを特徴とする請求項14に記載のガス分配システム。
- 前記ガス切換部が、各高速切換バルブの上流にある前記第1のガス流路のそれぞれに沿って配置されたフローレストリクタを含み、前記フローレストリクタが、前記フローレストリクタの上流にあってそれと近接する関連する第1のガス流路の領域において、ほぼ一定のガス圧を維持するように適合されたことを特徴とする請求項12に記載のガス分配システム。
- 前記高速切換バルブが、信号を受け取ってから約100ミリ秒未満又は約50ミリ秒未満の期間内に、開く、かつ/又は、閉じることができることを特徴とする請求項12に記載のガス分配システム。
- シャワーヘッド電極アセンブリを含み、約1/2リットルから約4リットルの内部容量を有するプラズマ処理チャンバと、
前記プラズマ処理チャンバと流体連通している、請求項12に記載のガス分配システムと、
を備え、
前記ガス分配システムが、前記プラズマ閉じ込め区画内の前記第1のプロセスガス又は前記第2のプロセスガスを、約1秒未満又は約200ミリ秒未満の期間内に、前記第1のプロセスガス又は前記第2のプロセスガスの他方と実質的に置き換えるように操作可能であることを特徴とするプラズマ処理装置。 - a)第1のプロセスガスを、少なくとも一層と前記層の上に重なるパターニングされたレジストマスクとを含む半導体基板を収容するプラズマ処理チャンバ内に供給するとともに、第2のプロセスガスをバイパス管路に誘導する工程と、
b)前記第1のプロセスガスを励起して第1のプラズマを発生させるとともに、(i)前記層の少なくとも1つの形状をエッチングするか、又は、(ii)前記マスク上にポリマー蒸着物を形成する工程と、
c)前記第1及び第2のプロセスガスのフローを切換えて、前記第2のプロセスガスを前記プラズマ処理チャンバ内に供給するとともに、前記第1のプロセスガスを前記バイパス管路に誘導する工程であって、前記第1のプロセスガスが、前記プラズマ処理チャンバのプラズマ閉じ込め区画内で、約1秒未満又は約200ミリ秒未満の期間内で前記第2のプロセスガスと実質的に置き換えられる工程と、
d)前記第2のプロセスガスを励起して第2のプラズマを発生させるとともに、(iii)前記層の前記少なくとも1つの形状をエッチングするか、又は、(iv)前記層及び前記マスクの上にポリマー蒸着物を形成する工程と、
e)前記第1及び第2のプロセスガスのフローを切換えて、前記第1のプロセスガスを前記プラズマ処理チャンバ内に供給するとともに、前記第2のプロセスガスを前記バイパス管路に誘導する工程であって、前記第2のプロセスガスが、前記プラズマ処理チャンバの前記プラズマ閉じ込め区画内で、約1秒未満又は約200ミリ秒未満の期間内で前記第1のプロセスガスと実質的に置き換えられる工程と、
f)前記基板にa)からe)の工程を複数回繰り返す工程と、
を含むことを特徴とする、プラズマ処理チャンバ内で半導体構造を処理する方法。 - 前記ポリマー蒸着物が、前記基板にa)からe)の工程を複数回繰り返した後、約100オングストローム未満の最大厚さに形成されることを特徴とする請求項23に記載の方法。
- 前記第1のプラズマが前記層の前記少なくとも1つの形状をエッチングし、前記第2のプラズマが、前記層及び前記マスク上に、前記マスクの条線を補修する前記蒸着物を形成することを特徴とする請求項23に記載の方法。
- 前記プラズマ閉じ込め区画が、約1/2リットルから約4リットルの容積を有することを特徴とする請求項23に記載の方法。
- 前記第1の層がSiO2であり、
前記マスクがUVレジストマスクであり、
前記第1のプロセスガスが、C4F8、O2及びアルゴンの混合物を含み、前記第1のプラズマが前記層をエッチングし、
前記第2のプロセスガスが、CH3F、アルゴン、及び任意にO2の混合物を含み、前記第2のプラズマが前記形状及び前記マスクの上に前記ポリマー蒸着物を形成することを特徴とする請求項23に記載の方法。 - 前記第1及び第2のプロセスガスがそれぞれ前記プラズマ処理チャンバ内に供給されるごとに、前記第1のプロセスガスが、約5秒から約20秒の期間、前記プラズマ処理チャンバ内に供給され、前記第2のプロセスガスが、約1秒から約3秒の期間、前記プラズマ処理チャンバ内に供給されることを特徴とする請求項27に記載の方法。
- 前記プラズマ処理チャンバが、内側区画及び外側区画を含むシャワーヘッド電極アセンブリを備え、前記第1のプロセスガスが前記内側区画及び前記外側区画に供給されるとともに、前記第2のプロセスガスが前記バイパス管路に誘導され、前記第2のプロセスガスが前記内側区画及び前記外側区画に供給されるとともに、前記第1のプロセスガスが前記バイパス管路に誘導されることを特徴とする請求項23に記載の方法。
- 前記第1のプロセスガス及び/又は前記第2のプロセスガスが、異なる流量で前記内側区画及び前記外側区画に供給されることを特徴とする請求項29に記載の方法。
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JP2021082127A (ja) * | 2019-11-21 | 2021-05-27 | 東京エレクトロン株式会社 | ガス供給システム、プラズマ処理装置及びガス供給システムの制御方法 |
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WO2005112093A3 (en) | 2007-01-11 |
KR101155839B1 (ko) | 2012-06-21 |
US20100159707A1 (en) | 2010-06-24 |
IL178463A0 (en) | 2007-02-11 |
JP5922076B2 (ja) | 2016-05-24 |
EP1741128A4 (en) | 2010-03-17 |
TW200607016A (en) | 2006-02-16 |
CN1969060A (zh) | 2007-05-23 |
IL178463A (en) | 2014-02-27 |
JP2007535819A (ja) | 2007-12-06 |
CN1969060B (zh) | 2014-01-01 |
KR20070009709A (ko) | 2007-01-18 |
US7708859B2 (en) | 2010-05-04 |
EP1741128A2 (en) | 2007-01-10 |
JP5709344B2 (ja) | 2015-04-30 |
TWI389192B (zh) | 2013-03-11 |
US20050241763A1 (en) | 2005-11-03 |
EP1741128B1 (en) | 2019-09-11 |
WO2005112093A2 (en) | 2005-11-24 |
US8673785B2 (en) | 2014-03-18 |
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