JP7022651B2 - 膜をエッチングする方法及びプラズマ処理装置 - Google Patents
膜をエッチングする方法及びプラズマ処理装置 Download PDFInfo
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- JP7022651B2 JP7022651B2 JP2018101397A JP2018101397A JP7022651B2 JP 7022651 B2 JP7022651 B2 JP 7022651B2 JP 2018101397 A JP2018101397 A JP 2018101397A JP 2018101397 A JP2018101397 A JP 2018101397A JP 7022651 B2 JP7022651 B2 JP 7022651B2
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- NXHILIPIEUBEPD-UHFFFAOYSA-H tungsten hexafluoride Chemical compound F[W](F)(F)(F)(F)F NXHILIPIEUBEPD-UHFFFAOYSA-H 0.000 description 1
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- Condensed Matter Physics & Semiconductors (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Description
Claims (18)
- チャンバ内で膜をエッチングする方法であって、該膜は開口を画成する側壁面及び底面を有する有機膜であって、該方法は、
前記チャンバ内に前駆体を含む前駆体ガスを供給して前記有機膜上に前記前駆体の層を形成する工程と、
酸素含有ガスから形成されたプラズマからの酸素化学種により前記有機膜をエッチングする工程と、
を含み、
前記有機膜をエッチングする前記工程において、前記プラズマからの前記酸素化学種により前記層が酸化されて保護領域が形成される、方法。 - 前記前駆体はシリコンを含有する、請求項1に記載の方法。
- 前記前駆体は金属を含有する、請求項1に記載の方法。
- 前記金属はタングステン又はチタンである、請求項3に記載の方法。
- 前記開口を形成する工程を更に含む、請求項1~3の何れか一項に記載の方法。
- 層を形成する前記工程と前記有機膜をエッチングする前記工程が交互に繰り返される、請求項1~5の何れか一項に記載の方法。
- 層を形成する前記工程と前記有機膜をエッチングする前記工程は、単一のプラズマ処理装置のチャンバ内に連続して維持される減圧された空間内で、前記有機膜を有する基板を該チャンバから取り出さずに実行される、請求項1~6の何れか一項に記載の方法。
- 前記プラズマ処理装置は、容量結合型プラズマ処理装置であり、
前記チャンバと、
下部電極を含み、前記チャンバ内で前記基板を支持するように構成された支持台と、
前記前駆体を含む前駆体ガス及び前記酸素含有ガスを前記チャンバ内に供給するように構成されたガス供給部と、
前記支持台の上方に設けられた上部電極と、
プラズマを生成するための第1の高周波電力を前記上部電極に供給するように構成された第1の高周波電源と、
基板にイオンを引き込むための第2の高周波電力を前記下部電極に供給するように構成された第2の高周波電源と、
を備える、請求項7に記載の方法。 - チャンバ内で膜をエッチングする方法であって、前記膜は開口を画成する側壁面及び底面を有しており、該方法は、
前記チャンバ内に前駆体を含む前駆体ガスを供給して前記膜上に前記前駆体の層を形成する工程と、
処理ガスから形成されたプラズマからの化学種により前記膜をエッチングする工程と、
を含み、
前記膜をエッチングする前記工程において、前記プラズマからの前記化学種又は前記プラズマからの別の化学種により前記層から保護領域が形成される、方法。 - 前記膜は、シリコン、炭素、酸素、及び水素を含む低誘電率膜であり、
前記前駆体は、シリコンを含み、
前記膜をエッチングする前記化学種は、フッ素化学種及び窒素化学種を含み、
前記窒素化学種によって前記前駆体が窒化される、
請求項9に記載の方法。 - 前記膜は、シリコン、炭素、酸素、及び水素を含む低誘電率膜であり、
前記前駆体は、金属を含み、
前記膜をエッチングする前記化学種は、フッ素化学種及び窒素化学種を含み、
前記別の化学種は、酸素化学種を含む、
請求項9に記載の方法。 - 前記金属はタングステン又はチタンである、請求項11に記載の方法。
- 前記膜は、多結晶シリコン膜であり、
前記前駆体は、シリコン又は金属を含み、
前記膜をエッチングする前記化学種は、ハロゲン化学種を含み、
前記別の化学種は、酸素化学種を含む、
請求項9に記載の方法。 - 前記金属はタングステン又はチタンである、請求項13に記載の方法。
- 前記膜は、窒化シリコン膜であり、
前記前駆体は、シリコン又は金属を含み、
前記膜をエッチングする前記化学種は、前記処理ガス中のハイドロフルオロカーボンから形成される化学種を含み、
前記別の化学種は、酸素化学種を含む、
請求項9に記載の方法。 - 前記金属はタングステン又はチタンである、請求項15に記載の方法。
- 前記前駆体の層を形成する前記工程において、プラズマは生成されない、請求項1~16の何れか一項に記載の方法。
- チャンバと、
前記チャンバ内で基板を支持するように構成された支持台と、
前駆体を含む前駆体ガス及び処理ガスを前記チャンバ内に供給するように構成されたガス供給部と、
前記処理ガスのプラズマを生成するよう構成されたプラズマ生成部と、
前記ガス供給部及び前記プラズマ生成部を制御するように構成された制御部と、
を備え、
前記制御部は、
前記支持台上に支持された基板の膜上に前記前駆体の層を形成するために、前記チャンバ内に前記前駆体ガスを供給するよう、前記ガス供給部を制御し、
前記膜をエッチングし、且つ、前記層を変質させて保護領域を形成するために、前記チャンバ内に前記処理ガスを供給し、且つ、該処理ガスのプラズマを生成するよう、前記ガス供給部及び前記プラズマ生成部を制御する、
よう構成されている、
プラズマ処理装置。
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US16/212,847 US10923360B2 (en) | 2018-05-28 | 2018-12-07 | Method of etching film and plasma processing apparatus |
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