JP2022161940A - エッチング方法及びプラズマ処理装置 - Google Patents
エッチング方法及びプラズマ処理装置 Download PDFInfo
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- JP2022161940A JP2022161940A JP2022126348A JP2022126348A JP2022161940A JP 2022161940 A JP2022161940 A JP 2022161940A JP 2022126348 A JP2022126348 A JP 2022126348A JP 2022126348 A JP2022126348 A JP 2022126348A JP 2022161940 A JP2022161940 A JP 2022161940A
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Abstract
Description
<第1の実験と第1の比較実験における堆積物DPの形成条件>
高周波電力HF:800W
第1の実験における高周波電力LF:0W
第1の比較実験における高周波電力LF:0W
処理時間:第1の実験 120秒、第1の比較実験 30秒
<第2の領域R2のエッチング条件>
高周波電力HF:100W
高周波電力LF:100W
エッチングガス:NF3ガスとArガスの混合ガス
処理時間:6秒
Claims (15)
- (a)基板を提供する工程であり、該基板は第1の領域及び第2の領域を有し、前記第2の領域はシリコン及び酸素を含み、前記第1の領域は前記第2の領域上のマスクである、該工程と、
(b)一酸化炭素ガスと貴ガス又は窒素ガスとを含む第1の処理ガスから生成される第1のプラズマにより前記マスク上に堆積物を形成する工程と、
(c)前記堆積物が形成された前記マスクを用いて前記第2の領域をエッチングする工程と、
を含む、エッチング方法。 - 前記マスクは、極端紫外線により形成されるマスクである、請求項1に記載のエッチング方法。
- 前記(c)は、
(c1)フルオロカーボンガスを含む第2の処理ガスからプラズマを生成することにより、フルオロカーボンを含む別の堆積物を前記基板上に形成する工程と、
(c2)前記別の堆積物がその上に形成された前記基板に希ガスから生成されるプラズマからのイオンを供給することにより、前記第2の領域をエッチングする工程と、
を含む、請求項1又は2に記載のエッチング方法。 - 前記(b)と前記(c)が交互に繰り返される、請求項1~3の何れか一項に記載のエッチング方法。
- 前記(b)及び前記(c)は、同一チャンバにおいて実行される、請求項1~4の何れか一項に記載のエッチング方法。
- 前記(b)は、第1のチャンバにおいて実行され、
前記(c)は、第2のチャンバにおいて実行される、
請求項1~4の何れか一項に記載のエッチング方法。 - 前記(b)と前記(c)との間に、真空環境下で前記第1のチャンバから前記第2のチャンバに前記基板を搬送する工程を更に含む、
請求項6に記載のエッチング方法。 - ガス入口及びガス出口を備えるチャンバと、
前記チャンバ内に設けられた基板支持器と、
前記基板支持器の上方に設けられた上部電極と、
前記チャンバ内でプラズマを生成するために高周波電力を供給するように構成された高周波電源と、
前記基板支持器に電気バイアスを供給するように構成されたバイアス電源と、
制御部と、
を備え、
前記制御部は、
(a)基板を提供する工程であり、該基板は第1の領域及び第2の領域を有し、前記第2の領域はシリコン及び酸素を含み、前記第1の領域は前記第2の領域上のマスクである、該工程と、
(b)一酸化炭素ガスと貴ガス又は窒素ガスとを含む第1の処理ガスから生成される第1のプラズマにより前記マスク上に堆積物を形成する工程と、
(c)前記堆積物が形成された前記マスクを用いて前記第2の領域をエッチングする工程と、
をもたらすように構成されている、
プラズマ処理装置。 - 前記高周波電源は前記上部電極に接続され、
前記制御部は、前記(b)のときに、前記高周波電源から前記上部電極に前記高周波電力を供給するように構成されている、
請求項8に記載のプラズマ処理装置。 - 前記高周波電源は前記基板支持器に接続され、
前記制御部は、前記(b)のときに、前記高周波電源から前記基板支持器に前記高周波電力を供給するように構成されている、
請求項8に記載のプラズマ処理装置。 - 前記制御部は、前記(c)のときに前記バイアス電源から前記基板支持器に前記電気バイアスを供給するように構成されている、請求項8~10の何れか一項に記載のプラズマ処理装置。
- 前記制御部は、
(d)前記(b)と前記(c)を交互に繰り返す工程を更にもたらすように構成される、請求項8~11の何れか一項に記載のプラズマ処理装置。 - ガス入口及びガス出口を備えるチャンバと、
前記チャンバ内に設けられた基板支持器と、
前記基板支持器の上方に設けられたアンテナと、
前記チャンバ内でプラズマを生成するために高周波電力を供給するように構成された高周波電源と、
前記基板支持器に電気バイアスを供給するように構成されたバイアス電源と、
制御部と、
を備え、
前記制御部は、
(a)基板を提供する工程であり、該基板は第1の領域及び第2の領域を有し、前記第2の領域はシリコン及び酸素を含み、前記第1の領域は前記第2の領域上のマスクである、該工程と、
(b)一酸化炭素ガスと貴ガス又は窒素ガスとを含む第1の処理ガスから生成される第1のプラズマにより前記マスク上に堆積物を形成する工程と、
(c)前記堆積物が形成された前記マスクを用いて前記第2の領域をエッチングする工程と、
をもたらすように構成されている、プラズマ処理装置。 - 前記高周波電源は前記アンテナに接続され、
前記制御部は、前記(b)のときに、前記高周波電源から前記アンテナに前記高周波電力を供給するように構成されている、
請求項13に記載のプラズマ処理装置。 - 前記制御部は、前記(c)のときに前記バイアス電源から前記基板支持器に前記電気バイアスを供給するように構成されている、請求項13又は14に記載のプラズマ処理装置。
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