JP7540868B2 - 成膜方法及び成膜システム - Google Patents
成膜方法及び成膜システム Download PDFInfo
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- JP7540868B2 JP7540868B2 JP2021004433A JP2021004433A JP7540868B2 JP 7540868 B2 JP7540868 B2 JP 7540868B2 JP 2021004433 A JP2021004433 A JP 2021004433A JP 2021004433 A JP2021004433 A JP 2021004433A JP 7540868 B2 JP7540868 B2 JP 7540868B2
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- H10P14/6921—Inorganic materials composed of oxides, glassy oxides or oxide-based glasses containing silicon
- H10P14/69215—Inorganic materials composed of oxides, glassy oxides or oxide-based glasses containing silicon the material being a silicon oxide, e.g. SiO2
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Description
前記シリコン酸化膜を堆積させる工程を終了させた後、前記シリコン酸化膜を、前記第1の温度よりも高い第2の温度でアニールする工程と、を有し、
前記アニールする工程において、前記シリコン酸化膜を850℃で60分アニールする。
始めに、本発明の実施形態による成膜方法を実施するのに好適な成膜装置について説明する。図1から図3までを参照すると、この成膜装置は、ほぼ円形の平面形状を有する扁平な真空容器1と、この真空容器1内に設けられ、真空容器1の中心に回転中心を有する回転テーブル2と、を備えている。真空容器1は、有底の円筒形状を有する容器本体12と、容器本体12の上面に対して、例えばOリングなどのシール部材13(図1)を介して気密に着脱可能に配置される天板11とを有している。
次に、本発明の実施形態による成膜方法について上述の成膜装置を用いて行う場合を例にとり説明する。本実施形態では、ウエハWとしてシリコンウエハを使用することとし、そのシリコンウエハには、図9(a)に示すように、トレンチTが形成されている。本実施形態に係る成膜方法は、ウエハのトレンチTの有無に関わらず適用することができるが、本実施形態においては、ウエハWの表面にトレンチTが形成されている例を挙げて説明する。
図11は、アニール装置を設ける場合の成膜システムの全体構成の一例を示し図である。図11(a)は、成膜装置及びアニール装置の全体構成の一例を示した図である。
以下、本実施形態に係る成膜方法を実施した実施例について説明する。
図12は、実施例1の結果を示した図である。実施例1においては、平坦面上にALDでシリコン酸化膜を成膜した場合において、400℃の低温プラズマと600℃の高温プラズマとで膜質を比較した。
図13は、実施例2の結果を示した図である。実施例2においては、窪みパターンが形成されたウエハWにALDでシリコン酸化膜を成膜した場合において、400℃の低温プラズマと600℃の高温プラズマとで膜質を比較した。成膜条件は実施例1と同様であるが、トレンチTの深さに応じてエッチングレートを測定している。測定点は、左から、トップ、トップから50nmの深さ、トップから200nmの深さ、トップから500nmの深さ、トップから1000nmの深さ、トップから2000nmの深さ、トップから3000nmの深さ、トップから5000nmの深さ、トップから7000nmの深さの点である。
図14は、実施例3の実施結果を示した図である。図14においては、熱酸化膜との比較において、成膜後アニールの温度によりエッチングレートがどのように変化するかを示している。熱酸化膜のエッチングレートは、左端に示すように1として正規化している。
図15は、実施例4の実施結果を示した図である。実施例4においては、実施例3と同様に熱酸化膜のエッチングレートを1とし、600℃の高温プラズマプロセスにおいて、高周波電源の出力がどのような影響を与えるかを調べた。
図16は、実施例5の実施結果を示した図である。実施例5においては、成膜後のアニールの効果と高温プラズマの効果を測定した。
Claims (7)
- 基板を600℃以上の第1の温度に加熱した状態で、プラズマを用いたALDにより前記基板上にシリコン酸化膜を堆積させる工程と、
前記シリコン酸化膜を堆積させる工程を終了させた後、前記シリコン酸化膜を、前記第1の温度よりも高い第2の温度でアニールする工程と、を有し、
前記アニールする工程において、前記シリコン酸化膜を850℃で60分アニールする、
シリコン酸化膜の成膜方法。 - 前記シリコン酸化膜を堆積させる工程は、
前記基板にシリコン含有ガスを吸着させる工程と、
前記基板に第1の酸化ガスを供給して前記基板に吸着した前記シリコン含有ガスを酸化し、前記シリコン酸化膜を前記基板上に堆積させる工程と、
前記シリコン酸化膜にプラズマにより活性化した第2の酸化ガスを供給し、前記シリコン酸化膜を改質する工程と、を含み、
前記基板に前記シリコン含有ガスを吸着させる工程、前記シリコン酸化膜を前記基板上に堆積させる工程及び前記シリコン酸化膜を改質する工程を繰り返す請求項1に記載のシリコン酸化膜の成膜方法。 - 前記第1の酸化ガスはオゾンであり、
前記第2の酸化ガスは酸素を含む請求項2に記載のシリコン酸化膜の成膜方法。 - 前記第2の酸化ガスは、酸素と水素を含む混合ガスである請求項3に記載のシリコン酸化膜の成膜方法。
- 前記シリコン含有ガスは、アミノシランガスである請求項2~4のいずれか一項に記載のシリコン酸化膜の成膜方法。
- 前記アミノシランガスは、トリス(ジメチルアミノ)シランガスである請求項5に記載のシリコン酸化膜の成膜方法。
- 処理室と、
前記処理室内に設けられ、基板を載置可能な回転テーブルと、
前記回転テーブル内に設けられ、前記基板を600℃以上の第1の温度に加熱可能なヒータと、
前記回転テーブルにシリコン含有ガスを供給可能なシリコン含有ガス供給部と、
前記回転テーブルに酸化ガスを供給可能な酸化ガス供給部と、
前記回転テーブルに水素と酸素を含む混合ガスを供給可能な混合ガス供給手段と、
前記混合ガスをプラズマにより活性化するプラズマ発生器と、を含む成膜装置と、
前記成膜装置から成膜処理後の前記基板を搬送可能な搬送ステーションと、
前記搬送ステーションにより搬入された前記成膜処理後の前記基板を、前記第1の温度よりも高い第2の温度でアニールするアニール装置と、を含み、
前記アニール装置は、前記成膜処理後の前記基板を、850℃で60分アニールする、
成膜システム。
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| JP2010245449A (ja) | 2009-04-09 | 2010-10-28 | Tokyo Electron Ltd | 基板処理装置、基板処理方法及び記憶媒体 |
| JP2014022653A (ja) | 2012-07-20 | 2014-02-03 | Tokyo Electron Ltd | 成膜装置及び成膜方法 |
| JP2017531920A (ja) | 2014-10-03 | 2017-10-26 | アプライド マテリアルズ インコーポレイテッドApplied Materials,Incorporated | 高温酸化ケイ素原子層堆積技術 |
| JP2019165078A (ja) | 2018-03-19 | 2019-09-26 | 東京エレクトロン株式会社 | 成膜方法及び成膜装置 |
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| JP2010245449A (ja) | 2009-04-09 | 2010-10-28 | Tokyo Electron Ltd | 基板処理装置、基板処理方法及び記憶媒体 |
| JP2014022653A (ja) | 2012-07-20 | 2014-02-03 | Tokyo Electron Ltd | 成膜装置及び成膜方法 |
| JP2017531920A (ja) | 2014-10-03 | 2017-10-26 | アプライド マテリアルズ インコーポレイテッドApplied Materials,Incorporated | 高温酸化ケイ素原子層堆積技術 |
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