JP6751326B2 - 基板処理装置および半導体装置の製造方法 - Google Patents
基板処理装置および半導体装置の製造方法 Download PDFInfo
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- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
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Description
図1は、第1実施形態に係る基板処理装置の構成を概略的に示す模式図である。本実施形態に係る基板処理装置1は、例えば、ウェハ状の基板20に設けられた金属膜(不図示)を、液体30(第1液体)で除去するエッチング処理装置である。このエッチング処理装置のタイプは、複数のウェハを一括してエッチング処理する、いわゆるバッチ処理タイプである。基板20は、例えば、3次元的に積層された金属膜であり、メモリデバイスに用いられる。また、このような基板20に用いられる金属膜はタングステン(W)が含まれる。
ステップS2のエッチングによって、液体30に含まれた硝酸および酢酸は揮発する一方で、リン酸は揮発しない。その結果、図4に示すように、液体30内でリン酸濃度は相対的に上昇する。そこで、リン酸濃度とタングステンのエッチング量との相関について調べると、両者の相関は高い実験結果を得られた。また、水濃度の変動とエッチング量との相関についても高い実験結果を得られた。
図6は、第2実施形態に係る基板処理装置の構成を概略的に示す模式図である。図2では、第1実施形態と同様の構成要素については同じ符号を付し、詳細な説明は省略する。
第3実施形態について説明する。第3実施形態に係る基板処理装置の構成は、図6に示す基板処理装置2と同じである。本実施形態に係る基板処理装置は、第2実施形態とは異なる方法でエッチング中の液体40の水濃度を制御する。以下、図8を参照して本実施形態の水濃度の制御方法について説明する。
図9は、第4実施形態に係る基板処理装置の構成を概略的に示す模式図である。この基板処理装置4は、1枚ずつウェハをエッチング処理する、いわゆる枚葉タイプのエッチング処理装置である。
Claims (7)
- リン酸を含む酸液と水とが混合され、基板に設けられた金属膜をエッチング可能な第1液体を貯留可能な第1容器と、
水を含む第2液体を貯留可能な第2容器と、
前記第1容器内で前記金属膜をエッチングすることによって、前記第1液体のリン酸濃度が上昇し、かつ、前記第1液体の水濃度が減少している期間において、前記第2液体を前記第1容器へ断続的に供給させることで前記水濃度を一時的に増加させ、かつ前記リン酸濃度を一時的に減少させ、さらに一定時間経過後には、前記第2液体を前記第1容器へ供給開始前の時点よりも前記水濃度及び前記リン酸濃度を上昇させる制御部と、
を備える基板処理装置。 - 前記水濃度を検出する水濃度計をさらに備え、
前記制御部は、前記水濃度計の検出値が、前記第2液体の供給開始時間毎に予め設定された前記水濃度の設定値に一致するように前記第2液体の供給を制御する、請求項1に記載の基板処理装置。 - 前記リン酸濃度を検出するリン酸濃度計、前記第1液体の粘度を検出する粘度計、または前記第1液体の比重を検出する比重計をさらに備え、
前記制御部は、前記リン酸濃度計、前記粘度計、または前記比重計の検出結果に基づいて前記第2液体の供給を制御する、請求項1に記載の基板処理装置。 - 前記第1容器に対して前記第1液体を循環させる循環路と、
前記循環路を流れる前記第1液体の流速を検出する流速計と、をさらに備え、
前記制御部は、前記流速計の検出結果に基づいて前記第2液体の供給を制御する、請求項1に記載の基板処理装置。 - 前記制御部は、経時的に多くなるように予め設定された供給量に基づいて前記第2液体を断続的に供給させる、請求項1に記載の基板処理装置。
- 前記制御部は、経時的に短くなるように予め設定された間隔で前記第2液体を断続的に供給させる、請求項1に記載の基板処理装置。
- リン酸を含む酸液と水とが混合され、第1容器に貯留された第1液体を用いて基板に設けられた金属膜をエッチングし、
前記エッチング中に、前記第1液体のリン酸濃度が上昇し、かつ、前記第1液体の水濃度が減少している期間において、第2容器に貯留された水を含む第2液体を前記第1容器へ断続的に供給させることで前記水濃度を一時的に増加させ、かつ前記リン酸濃度を一時的に減少させ、さらに一定時間経過後には、前記第2液体を前記第1容器へ供給開始前の時点よりも前記水濃度及び前記リン酸濃度を上昇させる、半導体装置の製造方法。
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JP2016182167A JP6751326B2 (ja) | 2016-09-16 | 2016-09-16 | 基板処理装置および半導体装置の製造方法 |
US15/449,308 US10008400B2 (en) | 2016-09-16 | 2017-03-03 | Substrate processing device and method of manufacturing semiconductor device |
US15/989,887 US10403524B2 (en) | 2016-09-16 | 2018-05-25 | Substrate processing device and method of manufacturing semiconductor device |
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JP6244277B2 (ja) * | 2014-08-11 | 2017-12-06 | 東京エレクトロン株式会社 | 基板液処理装置及び基板液処理方法並びに基板液処理プログラムを記憶したコンピュータ読み取り可能な記憶媒体 |
JP6440111B2 (ja) * | 2014-08-14 | 2018-12-19 | 株式会社Screenホールディングス | 基板処理方法 |
JP2016059855A (ja) * | 2014-09-17 | 2016-04-25 | 株式会社東芝 | 処理装置、及び、処理液の再利用方法 |
JP6454605B2 (ja) | 2015-06-01 | 2019-01-16 | 東芝メモリ株式会社 | 基板処理方法および基板処理装置 |
JP2017139295A (ja) * | 2016-02-02 | 2017-08-10 | 東芝メモリ株式会社 | 基板処理装置、基板処理方法、および基板処理液 |
US10832924B2 (en) * | 2016-09-23 | 2020-11-10 | SCREEN Holdings Co., Ltd. | Substrate treating device and substrate treating method |
JP6940232B2 (ja) * | 2016-09-23 | 2021-09-22 | 株式会社Screenホールディングス | 基板処理装置及び基板処理方法 |
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