JP5291467B2 - プラズマ酸化処理方法、記憶媒体、及び、プラズマ処理装置 - Google Patents
プラズマ酸化処理方法、記憶媒体、及び、プラズマ処理装置 Download PDFInfo
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
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- H01L21/314—Inorganic layers
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- H01L21/31654—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation of semiconductor materials, e.g. the body itself
- H01L21/31658—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation of semiconductor materials, e.g. the body itself by thermal oxidation, e.g. of SiGe
- H01L21/31662—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation of semiconductor materials, e.g. the body itself by thermal oxidation, e.g. of SiGe of silicon in uncombined form
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- H01L21/0223—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate
- H01L21/02233—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer
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Description
また、シリコン酸化膜を形成する際の被処理体の温度を200〜800℃とすることができる。
さらに、前記プラズマは、前記処理ガスが、複数のスロットを有する平面アンテナにより前記処理室内に導入されるマイクロ波によって励起されて形成されるマイクロ波励起プラズマが好ましい。
また、前記被処理体の前記凹凸形状のパターンは、その凹凸が疎な領域と密な領域とが形成されているものとすることができる。
また、本発明のシリコン酸化膜の形成方法では、被処理体表面に形成された凹凸形状のパターンの疎密に影響されることなく、均一な膜厚でシリコン酸化膜を形成できる。このため、これを絶縁膜として用いる半導体装置の信頼性を向上させることができる。
図1は、本発明のシリコン酸化膜の形成方法の実施に適したプラズマ処理装置の一例を模式的に示す断面図である。このプラズマ処理装置は、複数のスロットを有する平面アンテナ、特にRLSA(Radial Line Slot Antenna;ラジアルラインスロットアンテナ)にて処理室内にマイクロ波を導入してプラズマを発生させることにより、高密度かつ低電子温度のマイクロ波プラズマを発生させ得るRLSAマイクロ波プラズマ処理装置として構成されており、例えば、トランジスタのゲート絶縁膜をはじめとする各種半導体装置における絶縁膜の形成に好適に用いられる。
また、処理温度は200〜800℃の範囲から選択でき、400〜500℃が好ましい。
図3は、下記の条件A〜条件Dでシリコン表面にシリコン酸化膜を6nmの膜厚で形成した後、希フッ酸(HF:H2O=1:100)溶液に10秒間浸漬してウェットエッチング処理をした場合のシリコン酸化膜の膜厚の減少量(ΔTOX)を測定した結果を示している。ここで、条件A、条件Bは比較方法であり、条件Cは本発明方法である。また、条件Dは、熱酸化方法(参考)である。
Ar流量:500mL/min(sccm)
O2流量:5mL/min(sccm)
H2流量:0mL/min(sccm)
O2ガス比率:約1%
処理圧力:133.3Pa(1Torr)
マイクロ波パワー:2750W
マイクロ波パワー密度:2.3W/cm2
処理温度:400℃
処理時間:360秒
Ar流量:500mL/min(sccm)
O2流量:5mL/min(sccm)
H2流量:5mL/min(sccm)
O2ガス比率:約1%
処理圧力:133.3Pa(1Torr)
マイクロ波パワー:2750W
マイクロ波パワー密度:2.3W/cm2
処理温度:400℃
処理時間:55秒
Ar流量:120mL/min(sccm)
O2流量:37mL/min(sccm)
H2流量:3mL/min(sccm)
O2ガス比率:約23%
処理圧力:666.5Pa(5Torr)
マイクロ波パワー:2750W
マイクロ波パワー密度:2.3W/cm2
処理温度:400℃
処理時間:444秒
処理温度:950℃
Ar流量:990、750または500mL/min(sccm)
O2流量:10、250、または500mL/min(sccm)
H2流量:0mL/min(sccm)
O2ガス比率:約1%、約25%、約50%
処理圧力:13.3(0.1Torr)、133.3(1Torr)または666.5Pa(5Torr)
マイクロ波パワー:4000W
マイクロ波パワー密度:3.35W/cm2
処理温度:800℃
処理時間:30〜500秒
Claims (8)
- プラズマ処理装置の処理室内に、表面がシリコンで構成され表面に凹凸形状のパターンを有する被処理体を搬入することと、
処理ガスが酸素と水素を含み、処理ガス中の酸素の割合が20%以上で、かつ400Pa以上667Pa以下の処理圧力の条件で、前記処理室内にプラズマを形成することと、
前記プラズマにより、前記被処理体の表面のシリコンを酸化してシリコン酸化膜を形成することと、
を含む、プラズマ酸化処理方法。 - 前記処理ガス中の酸素の割合が25%以上である、請求項1に記載のプラズマ酸化処理方法。
- 前記処理ガス中の水素の割合が0.1〜10%の割合である、請求項1または請求項2に記載のプラズマ酸化処理方法。
- シリコン酸化膜を形成する際の被処理体の温度が200〜800℃である、請求項1から請求項3のいずれか1項に記載のプラズマ酸化処理方法。
- 前記プラズマは、前記処理ガスが、複数のスロットを有する平面アンテナにより前記処理室内に導入されるマイクロ波によって励起されて形成されるマイクロ波励起プラズマである、請求項1から請求項4のいずれか1項に記載のプラズマ酸化処理方法。
- 前記被処理体の前記凹凸形状のパターンは、その凹凸が疎な領域と密な領域とが形成されている、請求項1から請求項5のいずれか1項に記載のプラズマ酸化処理方法。
- コンピュータ上で動作し、処理容器を有するプラズマ処理装置を制御するプログラムが記憶された記憶媒体であって、
前記プログラムは、実行時に、請求項1から請求項6のいずれかのプラズマ酸化処理方法が行われるように、コンピュータに前記プラズマ処理装置を制御させる、記憶媒体。 - 被処理体が収容される処理室と、
前記処理室内に酸素と水素を含む処理ガスを供給する処理ガス供給機構と、
前記処理室内を真空排気する排気機構と、
前記処理室に前記処理ガスのプラズマを生成させるプラズマ生成機構と、
請求項1から請求項6のいずれかのプラズマ酸化処理方法に規定する条件により、表面がシリコンで構成され表面に凹凸形状のパターンを有する被処理体の表面を酸化してシリコン酸化膜を形成するように制御する制御部と、
を備えた、プラズマ処理装置。
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CN (1) | CN101523574B (ja) |
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CN103730373B (zh) * | 2013-12-31 | 2016-09-07 | 京东方科技集团股份有限公司 | 一种半导体器件的制备方法及半导体器件 |
US11791155B2 (en) | 2020-08-27 | 2023-10-17 | Applied Materials, Inc. | Diffusion barriers for germanium |
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JPH11145131A (ja) * | 1997-03-18 | 1999-05-28 | Toshiba Corp | 半導体装置の製造方法及び半導体製造装置、及び半導体装置 |
JP2004535077A (ja) * | 2001-07-13 | 2004-11-18 | インターナショナル・ビジネス・マシーンズ・コーポレーション | 原子状酸素促進酸化(atomicoxygenenhancedoxidation)を使ってゲート活性化を改良する方法 |
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JPH07118522B2 (ja) | 1990-10-24 | 1995-12-18 | インターナショナル・ビジネス・マシーンズ・コーポレイション | 基板表面を酸化処理するための方法及び半導体の構造 |
US20040142577A1 (en) * | 2001-01-22 | 2004-07-22 | Takuya Sugawara | Method for producing material of electronic device |
JP2002280369A (ja) * | 2001-03-19 | 2002-09-27 | Canon Sales Co Inc | シリコン基板の酸化膜形成装置及び酸化膜形成方法 |
JP4435666B2 (ja) * | 2004-11-09 | 2010-03-24 | 東京エレクトロン株式会社 | プラズマ処理方法、成膜方法 |
JP4246161B2 (ja) | 2005-01-17 | 2009-04-02 | 富士通株式会社 | タンパク質検出デバイスおよびタンパク質の定量分析方法 |
WO2006082730A1 (ja) * | 2005-02-01 | 2006-08-10 | Tokyo Electron Limited | 半導体装置の製造方法およびプラズマ酸化処理方法 |
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JPH11145131A (ja) * | 1997-03-18 | 1999-05-28 | Toshiba Corp | 半導体装置の製造方法及び半導体製造装置、及び半導体装置 |
JP2004535077A (ja) * | 2001-07-13 | 2004-11-18 | インターナショナル・ビジネス・マシーンズ・コーポレーション | 原子状酸素促進酸化(atomicoxygenenhancedoxidation)を使ってゲート活性化を改良する方法 |
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CN101523574B (zh) | 2012-05-02 |
US8043979B2 (en) | 2011-10-25 |
KR20090086059A (ko) | 2009-08-10 |
CN101523574A (zh) | 2009-09-02 |
JPWO2008041599A1 (ja) | 2010-02-04 |
WO2008041599A1 (fr) | 2008-04-10 |
TW200834731A (en) | 2008-08-16 |
US20100105216A1 (en) | 2010-04-29 |
TWI459468B (zh) | 2014-11-01 |
KR101140694B1 (ko) | 2012-05-03 |
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