JP6360770B2 - プラズマ処理方法及びプラズマ処理装置 - Google Patents
プラズマ処理方法及びプラズマ処理装置 Download PDFInfo
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Description
以上、本実施形態に係るプラズマ処理方法及びプラズマ処理装置について説明したが、実施形態はこれに限定されるものではない。以下では、他の実施形態について説明する。
例えば、成膜工程においてバイアス電圧を印加しても良い。すなわち、制御部60は、成膜工程において、処理ガス供給源15から処理チャンバ1内部に酸素含有ガス及びシリコン含有ガスを供給し、第1の高周波電源10aから処理チャンバ1内部へプラズマ生成用の高周波電力を印加して酸素含有ガス及びシリコン含有ガスのプラズマを生成する。この際、制御部60は、第2の高周波電源10bから載置台2へイオン引き込み用の高周波電力を印加することで、載置台2に対してバイアス電圧を印加する。すると、プラズマ中のイオンが載置台2に向けて引き込まれる。この結果、バイアス電圧を印加しない手法と比較して、部材上の膜の膜厚をより緻密に制御することが可能となる。
2 載置台
2a 基材
2b 冷媒流路
2c 冷媒入口配管
2d 冷媒出口配管
3 絶縁板
3a 内壁部材
4 支持台
5 フォーカスリング
6 静電チャック
6a 電極
6b 絶縁体
10a 第1の高周波電源
10b 第2の高周波電源
15 処理ガス供給源
16 シャワーヘッド
16a 本体部
16b 上部天板
52 可変直流電源
60 制御部
61 プロセスコントローラ
62 ユーザインターフェース
63 記憶部
71 排気口
72 排気管
73 排気装置
Claims (14)
- シリコン含有ガスに対する酸素含有ガスの流量比が0.2〜1.0である前記酸素含有ガス及び前記シリコン含有ガスのプラズマにより、チャンバの内部の部材の表面に対してシリコン酸化膜を成膜する成膜工程と、
前記部材の表面に前記シリコン酸化膜が成膜された後に、前記チャンバの内部に搬入された被処理体を処理ガスのプラズマによりプラズマ処理するプラズマ処理工程と、
プラズマ処理された前記被処理体が前記チャンバの外部に搬出された後に、フッ素含有ガスのプラズマにより前記部材の表面から前記シリコン酸化膜を除去する除去工程と
を含むことを特徴とするプラズマ処理方法。 - シリコン含有ガスに対する酸素含有ガスの流量比が0.2〜1.4である前記酸素含有ガス及び前記シリコン含有ガスのプラズマにより、チャンバの内部の部材の表面に対してシリコン酸化膜を成膜する成膜工程と、
前記成膜工程の後に、さらに、H2、CH4及びC3H6のうち少なくともいずれか一つを含む還元性ガスのプラズマにより、前記シリコン酸化膜を改質する改質工程と、
前記改質工程後に、前記チャンバの内部に搬入された被処理体を処理ガスのプラズマによりプラズマ処理するプラズマ処理工程と、
プラズマ処理された前記被処理体が前記チャンバの外部に搬出された後に、フッ素含有ガスのプラズマにより前記部材の表面から前記シリコン酸化膜を除去する除去工程と
を含むことを特徴とするプラズマ処理方法。 - 前記成膜工程の前に、さらに、炭素含有ガスのプラズマにより、前記部材の表面に対して炭素含有膜を成膜するプレ成膜工程を含むことを特徴とする請求項2に記載のプラズマ処理方法。
- 炭素含有ガスのプラズマにより、チャンバの内部の部材の表面に対して炭素含有膜を成膜するプレ成膜工程と、
前記プレ成膜工程の後に、シリコン含有ガスに対する酸素含有ガスの流量比が0.2〜1.4である前記酸素含有ガス及び前記シリコン含有ガスのプラズマにより、前記部材の表面に対してシリコン酸化膜を成膜する成膜工程と、
前記部材の表面に前記シリコン酸化膜が成膜された後に、前記チャンバの内部に搬入された被処理体を処理ガスのプラズマによりプラズマ処理するプラズマ処理工程と、
プラズマ処理された前記被処理体が前記チャンバの外部に搬出された後に、フッ素含有ガスのプラズマにより前記部材の表面から前記シリコン酸化膜を除去する除去工程と
を含むことを特徴とするプラズマ処理方法。 - 前記成膜工程において、前記シリコン含有ガスの流量が150sccm以上であることを特徴とする請求項1〜4のいずれか一つに記載のプラズマ処理方法。
- 前記シリコン含有ガスは、SiF4及びSiCl4のうち少なくともいずれか一つを含むことを特徴とする請求項1〜5のいずれか一つに記載のプラズマ処理方法。
- 前記炭素含有ガスは、CxHyFz〔式中、x、y及びzは整数を表し、(z−y)÷xは2以下〕で表されるガスを含むことを特徴とする請求項4に記載のプラズマ処理方法。
- 前記炭素含有ガスは、CH4、C4F8、CHF3、CH3F及びC2H4のうち少なくともいずれか一つを含むことを特徴とする請求項4に記載のプラズマ処理方法。
- 前記除去工程は、前記フッ素含有ガスのプラズマにより前記部材の表面から前記シリコン酸化膜を除去する第1除去工程と、酸素含有ガスのプラズマにより前記部材の表面から前記炭素含有膜を除去する第2除去工程とを含むことを特徴とする請求項4、7、8のいずれか一つに記載のプラズマ処理方法。
- 炭素含有ガス、並びに、シリコン含有ガスに対する酸素含有ガスの流量比が0.2〜1.4である前記酸素含有ガス及び前記シリコン含有ガスのプラズマにより、チャンバ内部の部材の表面に対して炭素及びシリコン含有膜を成膜する成膜工程と、
前記部材の表面に前記炭素及びシリコン含有膜が成膜された後に、前記チャンバの内部に搬入された被処理体を処理ガスのプラズマによりプラズマ処理するプラズマ処理工程と、
プラズマ処理された前記被処理体が前記チャンバの外部に搬出された後に、酸素及びフッ素含有ガスのプラズマにより前記部材の表面から前記炭素及びシリコン含有膜を除去する除去工程と
を含むことを特徴とするプラズマ処理方法。 - 前記炭素含有ガスは、CxHyFz〔式中、x、y及びzは整数を表し、(z−y)÷xは2以下〕で表されるガスを含み、前記シリコン含有ガスは、SiF4及びSiCl4のうち少なくともいずれか一つを含むことを特徴とする請求項10に記載のプラズマ処理方法。
- 前記炭素含有ガスは、CH4、C4F8、CHF3、CH3F及びC2H4のうち少なくともいずれか一つを含むことを特徴とする請求項10に記載のプラズマ処理方法。
- 前記成膜工程の後に、さらに、H2、CH4及びC3H6のうち少なくともいずれか一つを含む還元性ガスのプラズマにより、前記炭素及びシリコン含有膜を改質する改質工程を含むことを特徴とする請求項10〜12のいずれか一つに記載のプラズマ処理方法。
- 被処理体をプラズマ処理するためのチャンバと、
前記チャンバの内部を減圧するための排気部と、
前記チャンバの内部に処理ガスを供給するためのガス供給部と、
請求項1〜12のいずれか一つに記載のプラズマ処理方法を実行する制御部と
を備えたことを特徴とするプラズマ処理装置。
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