JP2012084872A - プラズマエッチング処理装置、プラズマエッチング処理方法、および半導体素子製造方法 - Google Patents
プラズマエッチング処理装置、プラズマエッチング処理方法、および半導体素子製造方法 Download PDFInfo
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Abstract
【解決手段】プラズマエッチング処理装置11は、その内部において被処理基板にプラズマ処理を行う処理容器12と、処理容器12内にプラズマ処理用のガスを供給するガス供給部13と、処理容器12内に配置され、その上に被処理基板Wを支持する支持台14と、プラズマ励起用のマイクロ波を発生させるマイクロ波発生器15と、マイクロ波発生器15により発生させたマイクロ波を用いて、処理容器12内にプラズマを発生させるプラズマ発生手段と、処理容器12内の圧力を調整する圧力調整手段と、支持台14に交流のバイアス電力を供給するバイアス電力供給手段と、バイアス電力供給手段における交流のバイアス電力を、停止および供給を交互に繰り返しながら行うよう制御する制御手段とを備える。
【選択図】図1
Description
Claims (11)
- 発生させたプラズマにより被処理基板にエッチング処理を行うプラズマエッチング処理装置であって、
その内部において被処理基板にプラズマ処理を行う処理容器と、
前記処理容器内にプラズマ処理用のガスを供給するガス供給部と、
前記処理容器内に配置され、その上に前記被処理基板を支持する支持台と、
プラズマ励起用のマイクロ波を発生させるマイクロ波発生器と、
前記マイクロ波発生器により発生させたマイクロ波を用いて、前記処理容器内にプラズマを発生させるプラズマ発生手段と、
前記処理容器内の圧力を調整する圧力調整手段と、
前記支持台に交流のバイアス電力を供給するバイアス電力供給手段と、
前記バイアス電力供給手段における交流のバイアス電力を、停止および供給を交互に繰り返しながら行うよう制御する制御手段とを備える、プラズマエッチング処理装置。 - 前記制御手段は、前記バイアス電力供給手段における交流のバイアス電力の供給時間(a)および停止時間を足し合わせた時間(b)に対する前記供給時間(a)の比であるデューティー比(a/b)を、0.5よりも高く1.0よりも低くなるようにして、前記バイアス電力供給手段によるバイアス電力の供給を制御する、請求項1に記載のプラズマエッチング処理装置。
- 前記プラズマ処理用のガスは、酸素原子を含むガスを含み、
前記ガス供給部は、全体の前記プラズマ処理用のガスに対する前記酸素原子を含むガスの濃度を0.05%以上5%以下となるようにして前記プラズマ処理用のガスを供給する、請求項1または2に記載のプラズマエッチング処理装置。 - 前記バイアス電力供給手段により供給されるバイアス電力の周波数は、10Hz以上30Hz以下である、請求項1〜3のいずれかに記載のプラズマエッチング処理装置。
- 前記バイアス電力供給手段により供給されるバイアスのエネルギーは、200eV以下である、請求項1〜4のいずれかに記載のプラズマエッチング処理装置。
- 前記圧力調整手段は、前記処理容器内の圧力を、10mTorr以上200mTorr以下となるように調整する、請求項1〜5のいずれかに記載のプラズマエッチング処理装置。
- 前記プラズマ発生手段は、マイクロ波を前記処理容器内へ透過させる誘電体板と、複数のスロット孔が設けられており、前記誘電体板の上方側に配置され、マイクロ波を前記誘電体板に放射するスロットアンテナ板とを備える、請求項1〜6のいずれかに記載のプラズマエッチング処理装置。
- 前記制御手段は、前記バイアス電力供給手段における交流のバイアス電力の供給時間(a)および停止時間を足し合わせた時間(b)に対する前記供給時間(a)の比であるデューティー比(a/b)を、0.18よりも高く0.75よりも低くなるようにして、前記バイアス電力供給手段によるバイアス電力の供給を制御する、請求項1に記載のプラズマエッチング処理装置。
- その内部において被処理基板にプラズマ処理を行う処理容器と、前記処理容器内にプラズマ処理用のガスを供給するガス供給部と、前記処理容器内に配置され、その上に前記被処理基板を支持する支持台と、プラズマ励起用のマイクロ波を発生させるマイクロ波発生器と、前記マイクロ波発生器により発生させたマイクロ波を用いて、前記処理容器内にプラズマを発生させるプラズマ発生手段と、前記処理容器内の圧力を調整する圧力調整手段とを備えるプラズマエッチング処理装置を用いて、発生させたプラズマにより被処理基板にエッチング処理を行うプラズマエッチング処理方法であって、
前記バイアス電力供給手段における交流のバイアス電力を、停止および供給を交互に繰り返しながら行うよう制御して、前記支持台に交流のバイアス電力を供給して前記被処理基板にエッチング処理を行う、プラズマエッチング処理方法。 - 支持台上に支持されたシリコン基板上に設けられた窒化シリコンをマスクとしてプラズマエッチングを行って製造される半導体素子製造方法であって、
前記シリコン基板をエッチングする際に、全体のプラズマ処理用のガスに対する酸素原子を含むガスの濃度を0.05%以上5%以下となるようにして前記プラズマ処理用のガスを供給する工程と、
交流のバイアス電力の供給時間(a)および停止時間を足し合わせた時間(b)に対する前記供給時間(a)の比であるデューティー比(a/b)を、0.5よりも高く1.0よりも低くなるようにして、前記支持台に供給するバイアス電力を制御する工程とを含む、半導体素子製造方法。 - 支持台上に支持された被処理基板に対し、発生させたプラズマにより被処理基板にプラズマエッチング処理を行うプラズマエッチング方法であって、
エッチングガスおよび反応副生成物をラジカル酸化して改質させる作用を有するガスを処理容器内に供給してプラズマを生成する工程と、
前記被処理基板をエッチングにより削る工程と、
堆積された反応副生成物をラジカル酸化して改質させる工程と、
前記被処理基板を支持する支持台に印加されるバイアス電力のうち、交流のバイアス電力の供給時間(a)および停止時間を足し合わせた時間(b)に対する前記供給時間(a)の比であるデューティー比(a/b)、および前記バイアス電力の周波数を調整して、前記反応副生成物の堆積量を制御する工程とを含む、プラズマエッチング処理方法。
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014071427A (ja) * | 2012-10-01 | 2014-04-21 | Asahi Kasei Chemicals Corp | 透明樹脂系発光装置及び照明装置 |
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CN102403183A (zh) | 2012-04-04 |
US20120064726A1 (en) | 2012-03-15 |
CN102403183B (zh) | 2016-03-09 |
JP5845754B2 (ja) | 2016-01-20 |
TWI473163B (zh) | 2015-02-11 |
US8969210B2 (en) | 2015-03-03 |
KR20120028853A (ko) | 2012-03-23 |
KR101265231B1 (ko) | 2013-05-23 |
TW201234474A (en) | 2012-08-16 |
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