JP6388552B2 - 基板処理装置及び基板処理方法 - Google Patents
基板処理装置及び基板処理方法 Download PDFInfo
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Description
本発明の一実施形態に係る基板処理装置について説明する。図1は、本発明の一実施形態に係る基板処理装置の概略断面図である。図2は、本発明の一実施形態に係る基板処理装置の概略平面図である。図3は、本発明の一実施形態に係る基板処理装置における分離領域を説明するための一部断面図である。図4は、本発明の一実施形態に係る基板処理装置の他の断面を示す一部断面図である。
本発明の一実施形態に係る基板処理装置を用いた基板処理方法の一例について説明する。以下では、ウエハW上に形成された凹形状パターンの1つであるビア内にSiO2膜を形成する方法を例として説明する。なお、第1の反応ガスとしてSi含有ガス、第2の反応ガスとして酸化ガス、フッ素含有ガスとしてCF4とArガスとO2ガスとの混合ガス(以下「CF4/Ar/O2ガス」という。)を用いる場合を例として説明する。
次に、本発明の一実施形態に係る基板処理装置を用いて、シミュレーションと実験を行った。
2 回転テーブル
31、32 反応ガスノズル
90 活性化ガス供給部
93 シャワーヘッド部
93a ガス吐出孔
94 配管
96 水素含有ガス供給部
100 制御部
W ウエハ
Claims (9)
- 真空容器内に回転可能に設けられ、基板を載置可能な回転テーブルと、
前記回転テーブルの表面に第1の反応ガスを供給可能な第1の反応ガス供給部と、
前記第1の反応ガス供給部から前記回転テーブルの周方向に離間して設けられ、前記回転テーブルの表面に前記第1の反応ガスと反応する第2の反応ガスを供給可能な第2の反応ガス供給部と、
前記第1の反応ガス供給部及び前記第2の反応ガス供給部から前記回転テーブルの周方向に離間して設けられ、前記回転テーブルの表面に活性化されたフッ素含有ガスを供給可能な吐出部を含む活性化ガス供給部と
を備え、
前記活性化ガス供給部は、
前記吐出部よりも上流側に設けられ、前記吐出部に前記フッ素含有ガスを供給可能な配管と、
前記配管に設けられ、前記配管の内部に水素含有ガスを供給可能な1又は複数の水素含有ガス供給部と、
前記配管を介して前記吐出部と接続され、前記フッ素含有ガスを活性化するプラズマ生成部と、
を含み、
前記水素含有ガス供給部は、前記吐出部と前記プラズマ生成部との間に設けられている、
基板処理装置。 - 前記水素含有ガス供給部は、前記プラズマ生成部よりも前記吐出部に近い位置に設けられている、
請求項1に記載の基板処理装置。 - 前記第1の反応ガスはシリコン含有ガスであり、
前記第2の反応ガスは酸化ガスであり、
請求項1又は2に記載の基板処理装置。 - 前記活性化ガス供給部により前記回転テーブルの表面に供給される前記フッ素含有ガスの分布に基づいて、前記水素含有ガス供給部から供給される前記水素含有ガスの流量を制御する制御部を更に有する、
請求項1乃至3のいずれか一項に記載の基板処理装置。 - 前記制御部は、
前記基板の表面に成膜のみを行うときには、前記第1の反応ガス供給部及び前記第2の反応ガス供給部から前記第1の反応ガス及び前記第2の反応ガスを各々供給すると共に、前記活性化ガス供給部からの前記フッ素含有ガスの供給を停止し、
前記基板の表面に形成された膜のエッチングのみを行うときには、前記第1の反応ガス供給部及び前記第2の反応ガス供給部からの前記第1の反応ガス及び前記第2の反応ガスの供給を停止すると共に、前記活性化ガス供給部及び前記水素含有ガス供給部から前記フッ素含有ガス及び前記水素含有ガスを各々供給する、
請求項4に記載の基板処理装置。 - 真空容器内に設けられた回転テーブルの表面に基板を載置し、回転テーブルを回転させながらフッ素含有ガスを真空容器内に供給し、前記基板の表面に形成された膜をエッチングするエッチング工程を含む基板処理方法であって、
前記エッチング工程は、前記回転テーブルの表面にフッ素含有ガスを供給すると共に、前記フッ素含有ガスを前記回転テーブルの表面に供給するガス吐出孔を含む吐出部よりも上流側から水素含有ガスを供給する工程を含み、
前記回転テーブルの表面に供給される前記フッ素含有ガスの分布に基づいて、前記水素含有ガスの流量を変化させる、
基板処理方法。 - 前記回転テーブルを回転させながら、第1の反応ガスと、前記第1の反応ガスと反応する第2の反応ガスとを前記真空容器内に供給し、前記基板の表面に膜を形成する成膜工程を更に有する、
請求項6に記載の基板処理方法。 - 前記成膜工程は、前記回転テーブルを複数回連続的に回転させながら、前記フッ素含有ガスを前記真空容器内に供給することなく、前記第1の反応ガス及び前記第2の反応ガスを前記真空容器内に供給する工程を含み、
前記エッチング工程は、前記回転テーブルを複数回連続的に回転させながら、前記第1の反応ガス及び前記第2の反応ガスを前記真空容器内に供給することなく、前記フッ素含有ガス及び前記水素含有ガスを前記真空容器内に供給する工程を含む、
請求項7に記載の基板処理方法。 - 前記回転テーブルを複数回連続的に回転させながら、前記第1の反応ガス、前記第2の反応ガス、前記フッ素含有ガス及び前記水素含有ガスを前記真空容器内に同時に供給し、前記回転テーブルが1回転する間に、前記成膜工程と前記エッチング工程とを1回ずつ行うサイクルを複数回繰り返す、
請求項7に記載の基板処理方法。
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