JP7065728B2 - 成膜方法及び成膜装置 - Google Patents
成膜方法及び成膜装置 Download PDFInfo
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Description
本開示の一実施形態に係る成膜方法を実施できる成膜装置について、多数枚の基板に対して一括で熱処理を行うバッチ式の縦型熱処理装置を例に挙げて説明する。但し、成膜装置は、縦型熱処理装置に限定されるものではなく、種々の装置であってよい。例えば、成膜装置は、基板を1枚ずつ処理する枚葉式の装置であってもよい。また、例えば処理容器内の回転テーブルの上に配置した複数枚の基板を回転テーブルにより公転させ、原料ガスが供給される領域と、原料ガスと反応する反応ガスが供給される領域とを順番に通過させて基板上に成膜するセミバッチ式の装置であってもよい。
(第1の実施形態)
第1の実施形態に係る成膜方法について、上記の成膜装置1により、基板の上に形成された複数の凸部の上面に選択的にアモルファスシリコン膜(以下「シリコン膜」という。)を成膜する場合を例に挙げて説明する。以下の成膜方法は、制御部95が成膜装置1の各部の動作を制御することにより実行される。図3は、第1の実施形態に係る成膜方法を示す工程断面図である。
第2の実施形態に係る成膜方法について説明する。第2の実施形態に係る成膜方法は、基板の上に形成された複数の凸部の上部(上面及び側壁の上部)に選択的にシリコン膜を成膜し、隣接する凸部により形成される開口を塞ぐ方法である。以下の成膜方法は、制御部95が成膜装置1の各部の動作を制御することにより実行される。図4は、第2の実施形態に係る成膜方法を示す工程断面図である。
76 ガス供給管
78 ガス供給管
95 制御部
101 基板
102 凸部
102a 開口
102t 上面
102s 側壁
104 シリコン膜
Claims (12)
- 基板の上に形成された複数の凸部の上部に選択的にシリコン膜を成膜する成膜方法であって、
前記基板にシリコン含有ガスを熱的に活性化して供給し、前記凸部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する第1成膜工程と、
前記第1成膜工程の後、前記基板にエッチングガスを熱的に活性化して供給し、前記凸部の上面に前記シリコン膜を残存させると共に前記凸部の側壁の前記シリコン膜を除去するエッチング工程と、
前記エッチング工程の後、前記基板にシリコン含有ガスを熱的に活性化して供給し、前記凸部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する第2成膜工程と、
を有する、
成膜方法。 - 基板の上に形成された複数の凸部の上部に選択的にシリコン膜を成膜する成膜方法であって、
前記基板にシリコン含有ガスを供給し、前記凸部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する第1成膜工程と、
前記第1成膜工程の後、前記基板にエッチングガスを供給し、前記凸部の上面に前記シリコン膜を残存させると共に前記凸部の側壁の前記シリコン膜を除去するエッチング工程と、
前記エッチング工程の後、前記基板にシリコン含有ガスを供給し、前記凸部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する第2成膜工程と、
を有し、
前記エッチング工程では、前記シリコン膜をコンフォーマルにエッチングする、
成膜方法。 - 基板の上に形成された複数の凸部の上部に選択的にシリコン膜を成膜する成膜方法であって、
前記基板にシリコン含有ガスを供給し、前記凸部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する第1成膜工程と、
前記第1成膜工程の後、前記基板にエッチングガスを供給し、前記凸部の上面に前記シリコン膜を残存させると共に前記凸部の側壁の前記シリコン膜を除去するエッチング工程と、
前記エッチング工程の後、前記基板にシリコン含有ガスを供給し、前記凸部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する第2成膜工程と、
を有し、
前記第2成膜工程では、隣接する前記凸部により形成される開口が閉塞するように前記シリコン膜を成膜する、
成膜方法。 - 基板の上に形成された複数の凸部の上部に選択的にシリコン膜を成膜する成膜方法であって、
前記基板にシリコン含有ガスを供給し、前記凸部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する第1成膜工程と、
前記第1成膜工程の後、前記基板にエッチングガスを供給し、前記凸部の上面に前記シリコン膜を残存させると共に前記凸部の側壁の前記シリコン膜を除去するエッチング工程と、
前記エッチング工程の後、前記基板にシリコン含有ガスを供給し、前記凸部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する第2成膜工程と、
を有し、
前記第1成膜工程における前記シリコン含有ガスは、ジシランガスである、
成膜方法。 - 基板の上に形成された複数の凸部の上部に選択的にシリコン膜を成膜する成膜方法であって、
前記基板にシリコン含有ガスを供給し、前記凸部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する第1成膜工程と、
前記第1成膜工程の後、前記基板にエッチングガスを供給し、前記凸部の上面に前記シリコン膜を残存させると共に前記凸部の側壁の前記シリコン膜を除去するエッチング工程と、
前記エッチング工程の後、前記基板にシリコン含有ガスを供給し、前記凸部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する第2成膜工程と、
を有し、
前記エッチングガスは、臭素含有ガス又はヨウ素含有ガスである、
成膜方法。 - 前記臭素含有ガスは、HBrガス又はBr2ガスであり、
前記ヨウ素含有ガスは、HIガス又はI2ガスである、
請求項5に記載の成膜方法。 - 前記第2成膜工程では、隣接する前記凸部により形成される開口が閉塞しないように前記シリコン膜を成膜する、
請求項1、2、4乃至6のいずれか一項に記載の成膜方法。 - 前記第1成膜工程を1回行った後、
前記エッチング工程及び前記第2成膜工程を交互に所定の回数繰り返し、前記凸部の上面に所定の膜厚のシリコン膜を成膜する、
請求項1、2、4乃至7のいずれか一項に記載の成膜方法。 - 前記第1成膜工程では、隣接する前記凸部により形成される開口が閉塞しないように前記シリコン膜を成膜する、
請求項1乃至8のいずれか一項に記載の成膜方法。 - 前記第1成膜工程の前に、前記基板にアミノシラン系ガスを供給し、前記凸部にシード層を形成するシード層形成工程を更に有する、
請求項1乃至9のいずれか一項に記載の成膜方法。 - 前記凸部は、組成の異なるシリコン含有膜を積層した積層膜である、
請求項1乃至10のいずれか一項に記載の成膜方法。 - 基板の上に形成された複数の凸部の上部に選択的にシリコン膜を成膜する装置であって、
前記基板を収容する処理容器と、
前記処理容器内にシリコン含有ガスを供給する成膜ガス供給部と、
前記処理容器内にエッチングガスを供給するエッチングガス供給部と、
制御部と、
を備え、
前記制御部は、
前記基板にシリコン含有ガスを熱的に活性化して供給し、前記凸部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する第1成膜工程と、
前記第1成膜工程の後、前記基板にエッチングガスを熱的に活性化して供給し、前記凸部の上面に前記シリコン膜を残存させると共に前記凸部の側壁の前記シリコン膜を除去するエッチング工程と、
前記エッチング工程の後、前記基板にシリコン含有ガスを熱的に活性化して供給し、前記凸部の側壁の下部よりも上部の膜厚が厚くなるようにシリコン膜を成膜する第2成膜工程と、
を実行する、
成膜装置。
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