JP6602887B2 - プラズマ処理チャンバ内のエッチングプロセスのアジマス方向の均質性の制御 - Google Patents
プラズマ処理チャンバ内のエッチングプロセスのアジマス方向の均質性の制御 Download PDFInfo
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Description
本願は、米国特許仮出願第62/135437号(U.S. Provisional Patent Application Serial No.62/135,437)の優先権を主張し、この出願は引用によりあらゆる意味で本願に組み込まれるものとする。
本発明は、プラズマ源を用いた基板処理に関する。
Claims (16)
- プラズマ処理装置であって、
プラズマ処理チャンバと、
前記プラズマ処理チャンバの上方に配置されたRFケージと、
前記プラズマ処理チャンバと前記RFケージとを分離する誘電窓と、
前記誘電窓の上方に配置されており、電力が供給された際に前記プラズマ処理チャンバ内に誘導結合プラズマを発生させるように動作可能なプラズマ発生コイルと、
前記RFケージ内で、前記プラズマ発生コイルの少なくとも一部に近接して配置された導電性表面と、
を含み、
前記導電性表面は、前記プラズマ発生コイルと前記RFケージ内の少なくとも1つの他の要素との間の通信を減少するように構成されたRFシールドであり、
前記導電性表面は、前記プラズマ発生コイルに電力が供給された際に、前記導電性表面と前記プラズマ発生コイルとの間にアジマス方向で可変の誘導結合を発生させるように配置されている、
プラズマ処理装置。 - 前記導電性表面と前記プラズマ発生コイルとの間のアジマス方向で可変の前記誘導結合は、前記プラズマ発生コイルと前記誘導結合プラズマとの間の誘導結合に対して非対称の障害を発生させるように動作可能である、
請求項1記載のプラズマ処理装置。 - 前記導電性表面の第1のアジマス部分は、前記プラズマ発生コイルから第1の距離だけ離れて配置されており、
前記導電性表面の第2のアジマス部分は、前記プラズマ発生コイルから、前記第1の距離とは異なる第2の距離だけ離れて配置されている、
請求項1記載のプラズマ処理装置。 - 前記導電性表面の少なくとも一部は、前記プラズマ発生コイルに対して相対的に可動である、
請求項1記載のプラズマ処理装置。 - 前記導電性表面は、アースされている、
請求項1記載のプラズマ処理装置。 - 前記導電性表面は、環状シールドを含む、
請求項1記載のプラズマ処理装置。 - 前記環状シールドの少なくとも第1のアジマス部分は、前記環状シールドの第2のアジマス部分に対して相対的に、前記プラズマ発生コイルに近づく方向で屈曲される、
請求項6記載のプラズマ処理装置。 - 前記環状シールドの中央部は、前記プラズマ発生コイルに対して相対的に固定されている、
請求項6記載のプラズマ処理装置。 - 前記環状シールドの周縁の少なくとも一部は、前記プラズマ発生コイルに向かう方向および前記プラズマ発生コイルから離れる方向で可動である、
請求項8記載のプラズマ処理装置。 - 前記周縁の少なくとも一部は、前記RFケージの側壁に配置された1つもしくは複数のピンによって保持されている、
請求項9記載のプラズマ処理装置。 - 前記導電性表面は、前記プラズマ発生コイルの選択されたアジマス部分のみに近接して配置された部分環状シールドを含む、
請求項1記載のプラズマ処理装置。 - 前記プラズマ処理装置は、複数のプラズマ発生コイルを含む、
請求項1記載のプラズマ処理装置。 - 前記プラズマ処理装置は、複数の前記導電性表面を含み、
各導電性表面は、前記複数のプラズマ発生コイルのうち少なくとも1つに対応しており、
各導電性表面は、前記プラズマ発生コイルに電力が供給された際に、前記導電性表面とこれに対応するプラズマ発生コイルとの間にアジマス方向で可変の誘導結合が発生するように配置されている、
請求項12記載のプラズマ処理装置。 - さらに、前記導電性表面に接続された導電性ワイヤを含み、
前記導電性ワイヤの少なくとも一部は、前記導電性ワイヤから前記プラズマ発生コイルまでの距離が増大または低減されるように調整可能である、
請求項1記載のプラズマ処理装置。 - プラズマ処理装置であって、
プロセスガスを閉じ込めるように動作可能な内室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の上方に配置されたRFケージと、
誘電窓と、
RFエネルギが供給された際に前記プラズマ処理チャンバ内に誘導結合プラズマを発生させるように動作可能な1つもしくは複数の誘導エレメントと、
前記RFケージ内で、前記1つもしくは複数の誘導エレメントの少なくとも一部に近接して配置された1つもしくは複数の導電性表面と、
を含み、
前記1つもしくは複数の導電性表面の少なくとも一部は、前記1つもしくは複数の誘導エレメントにRFエネルギが供給された際に前記1つもしくは複数の導電性表面と前記1つもしくは複数の誘導エレメントとの間に1つもしくは複数のアジマス方向で可変の誘導結合が発生するよう、前記1つもしくは複数の誘導エレメントに対して相対的に可動であり、
前記1つもしくは複数の導電性表面の少なくとも1つは、前記1つもしくは複数の誘導エレメントと前記RFケージ内の少なくとも1つの他の要素との間の通信を減少するように構成されたRFシールドである、
プラズマ処理装置。 - 前記1つもしくは複数の誘導エレメントは、第1の誘導エレメントと第2の誘導エレメントとを含み、前記1つもしくは複数の導電性表面は、第1の導電性表面と第2の導電性表面とを含み、
前記第1の導電性表面の少なくとも一部は、前記第1の誘導エレメントにRFエネルギが供給された際に前記第1の導電性表面と前記第1の誘導エレメントとの間にアジマス方向で可変の第1の誘導結合が発生するよう、前記第1の誘導エレメントに対して相対的に可動であり、
前記第2の導電性表面の少なくとも一部は、前記第2の誘導エレメントにRFエネルギが供給された際に前記第2の導電性表面と前記第2の誘導エレメントとの間にアジマス方向で可変の第2の誘導結合が発生するよう、前記第2の誘導エレメントに対して相対的に可動である、
請求項15記載のプラズマ処理装置。
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US201562135437P | 2015-03-19 | 2015-03-19 | |
US62/135,437 | 2015-03-19 | ||
PCT/US2016/022906 WO2016149515A1 (en) | 2015-03-19 | 2016-03-17 | Controlling azimuthal uniformity of etch process in plasma processing chamber |
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