JP7450512B2 - 基板処理方法及び基板処理装置 - Google Patents
基板処理方法及び基板処理装置 Download PDFInfo
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Description
図1は、プラズマ処理装置1の構成の概略を模式的に示す縦断面図である。プラズマ処理装置1では、ウェハWの表面に任意のプラズマ処理、例えば、エッチング処理、拡散処理又は成膜処理等が行われる。なお、以下の説明においては、ウェハWにおけるプラズマ処理が施される側の面を「表面」、表面とは反対側の後述の載置台40により保持される側の面を「裏面」とそれぞれいう場合がある。
本実施形態にかかるプラズマ処理装置1は、以上のように構成されている。次に、プラズマ処理装置1を用いて行われるプラズマ処理について説明する。図3は、本実施形態にかかるプラズマ処理の主な工程を示すフロー図である。また図4は、プラズマ処理に伴うウェハWの電位変化(Vdc変化)の一例を示すグラフである。なお、以下の説明においてはウェハWの表面に形成されたSi膜のエッチング処理を行う場合を例に説明を行うが、ウェハWの表面に形成されるSi含有膜の種類は任意(例えばSiN膜やSiO2膜等)に決定できる。また、ウェハWに施されるプラズマ処理もエッチング処理に限定されるものではない。
以上の本実施形態によれば、ウェハWのプラズマ処理を行う処理空間Sがプラズマ生成空間Gとスリットが形成された仕切板11を介して連通して設けられている。このため、処理空間Sにおけるプラズマ処理に際して昇降ピン61によりウェハWを昇降させることで、ウェハWにVdc値を変化させることができる。そして、かかるウェハWのVdc変化に伴いウェハWの帯電状態を変化(逆転)できるため、該ウェハWの裏面に電気的に付着していたパーティクルを適切に離脱できる。すなわち、ウェハWの裏面の金属汚染を低減できる。
10 処理容器
11 仕切板
40 載置台
61 昇降ピン
G プラズマ生成空間
S 処理空間
W ウェハ
Claims (16)
- 基板処理装置により基板を処理する方法であって、
基板処理装置は、
内部で基板を処理する処理容器と、
前記処理容器の内部に形成されるプラズマ生成空間と、
前記プラズマ生成空間と仕切板を介して連通する処理空間と、
前記処理空間の内部に設けられ、基板を上面に載置する載置台と、
前記載置台上で基板を昇降させる昇降機構と、を有し、
前記処理空間における基板のプラズマ処理中に、前記昇降機構を用いて基板を昇降させ、該プラズマ処理中の基板に電位変化を生じさせる、基板処理方法。 - 前記プラズマ処理を前記昇降機構により前記載置台から基板が離隔された状態で開始し、
該プラズマ処理中に前記昇降機構により基板を下降させて前記載置台に基板を載置する、請求項1に記載の基板処理方法。 - 前記昇降機構による基板の下降を前記プラズマ処理の開始直後に行う、請求項2に記載の基板処理方法。
- 前記昇降機構は、前記基板処理装置に対する前記基板の搬入出時において当該基板を保持する昇降ピンである、請求項1~3のいずれか一項に記載の基板処理方法。
- 少なくとも前記載置台における基板の保持面を、該載置台を構成する金属材料よりも耐ラジカル性を有するコーティング材料によりコーティングする、請求項1~4のいずれか一項に記載の基板処理方法。
- 前記昇降機構を、前記コーティング材料により更にコーティングする、請求項5に記載の基板処理方法。
- 前記コーティング材料は、YF3、YOFの少なくともいずれかから選択される、請求項5又は6に記載の基板処理方法。
- 前記昇降機構を、少なくとも前記載置台を構成する金属材料よりも耐ラジカル性を有する構成部材により構成する、請求項1~7のいずれか一項に記載の基板処理方法。
- 処理容器の内部で基板を処理する基板処理装置であって、
前記処理容器の内部に形成されるプラズマ生成空間と、
前記プラズマ生成空間と仕切板を介して連通する処理空間と、
前記処理空間の内部に設けられ、基板を上面に載置する載置台と、
前記載置台上で基板を昇降させる昇降機構と、
前記昇降機構の動作を制御する制御部と、を有し、
前記制御部は、前記処理空間における基板のプラズマ処理中に、基板を昇降させるように前記昇降機構を制御し、該プラズマ処理中の基板に電位変化を生じさせる、基板処理装置。 - 前記制御部は、
前記プラズマ処理の開始時においては前記昇降機構により前記載置台から基板を離隔し、
該プラズマ処理中において前記昇降機構により前記載置台に基板を載置するように、前記昇降機構の動作を制御する、請求項9に記載の基板処理装置。 - 前記制御部は、前記プラズマ処理の開始直後に前記昇降機構を下降させて、前記載置台に基板を載置する、請求項10に記載の基板処理装置。
- 前記昇降機構は、前記基板処理装置に対する前記基板の搬入出時において当該基板を保持する昇降ピンである、請求項9~11のいずれか一項に記載の基板処理装置。
- 少なくとも前記載置台における基板の保持面は、該載置台を構成する金属材料よりも耐ラジカル性を有するコーティング材料によりコーティングされている、請求項9~12のいずれか一項に記載の基板処理装置。
- 前記昇降機構は、前記コーティング材料によりコーティングされている、請求項13に記載の基板処理装置。
- 前記コーティング材料は、YF3、YOFの少なくともいずれかである、請求項13又は14に記載の基板処理装置。
- 前記昇降機構は、少なくとも前記載置台を構成する金属材料よりも耐ラジカル性を有する構成部材により構成される、請求項9~15のいずれか一項に記載の基板処理装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2020170068A JP7450512B2 (ja) | 2020-10-07 | 2020-10-07 | 基板処理方法及び基板処理装置 |
CN202111138400.5A CN114300332A (zh) | 2020-10-07 | 2021-09-27 | 基板处理方法和基板处理装置 |
TW110135989A TW202220053A (zh) | 2020-10-07 | 2021-09-28 | 基板處理方法及基板處理裝置 |
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