JP4281082B2 - 堆積前の表面調整方法 - Google Patents
堆積前の表面調整方法 Download PDFInfo
- Publication number
- JP4281082B2 JP4281082B2 JP2002544761A JP2002544761A JP4281082B2 JP 4281082 B2 JP4281082 B2 JP 4281082B2 JP 2002544761 A JP2002544761 A JP 2002544761A JP 2002544761 A JP2002544761 A JP 2002544761A JP 4281082 B2 JP4281082 B2 JP 4281082B2
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- Prior art keywords
- deposition
- silicon
- layer
- oxide
- gas
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- Expired - Lifetime
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—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
- 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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
- H01L21/28185—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation with a treatment, e.g. annealing, after the formation of the gate insulator and before the formation of the definitive gate conductor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/02—Pretreatment of the material to be coated
- C23C16/0209—Pretreatment of the material to be coated by heating
- C23C16/0218—Pretreatment of the material to be coated by heating in a reactive atmosphere
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/02—Pretreatment of the material to be coated
- C23C16/0227—Pretreatment of the material to be coated by cleaning or etching
- C23C16/0245—Pretreatment of the material to be coated by cleaning or etching by etching with a plasma
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
- C23C16/403—Oxides of aluminium, magnesium or beryllium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
- C23C16/405—Oxides of refractory metals or yttrium
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
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Description
好ましい実施の形態を、枚葉式で水平フローのコールドウォール反応装置を基に示すが、本発明の別の態様においては、別のタイプの反応装置に対して適用され得る。例示するシングルパス(single−pass)の水平フローデザインによって、滞留時間の短い反応物ガスの層流が可能になる。さらに、反応物が互いに、そしてチャンバ表面と相互作用するのを最小限に抑えつつ、順次処理が促進される。したがって他にも利点はあるが、このような層流によって、互いに反応し得る反応物を順次流すことができる。避けるべき反応としては、酸素及び水素含有反応物によって生じるような、高い発熱性又は爆発性を伴う反応、及びチャンバのパーティクル汚染を引き起こす反応である。しかし、十分なパージ時間によって相いれない反応物を取り除くことができるならば、別の順次プロセス用に、これらの目的を実現するために別の反応装置デザインを設けることも、可能である。
図3は、本発明に係る概略的なプロセス手順を示すものであり、半導体基板上にトランジスタゲートスタックを形成する場合を例示している。例示したように、半導体構造を含む単一基板を最初にクリーニングして、汚染物質と半導体構造上における自然発生物又は自然酸化膜を除去する(100)。半導体構造には、別のもの、エピタキシャルシリコン層、又はモノリシックシリコン層の上面が含まれ得る。従来、ゲート酸化物を成長させる前のウェハクリーニングは、ウェハをプロセスチャンバ内へ入れる前に外部で(ex−situ)行われている。例えばウェハを、SCl/HFウェットエッチングバス内でクリーニングするとよい。或いは、統合されたHF及び酢酸蒸気クリーニングが、クラスターツール内部の隣接するモジュール内で行われ、搬送時間及び再汚染又は再酸化の機会とを減らすことができる。幾つかの応用例においては、SC1のステップで残ったクリーニング酸化物(cleaning oxide)は、除去されないが、代わりに初期酸化物層として用いられる。別の可能性として、水素ベークステップをチャンバ12内で行って、自然酸化膜を昇華させることができる。少量のHCl蒸気をこのステップに加えることができ、水素ベーク中に金属汚染物質や同様のもののクリーニングが補助され得る。さらに別の形態においては、プラズマ生成物は、水素ガスの代替としてのHラジカルなどによって、in−situクリーニングが補助、又は実行され得る。
・(CH3)3Alパルス
・N2パージ
・H2Oパルス
・N2パージ
典型的な酸化アルミニウム堆積サイクルを、表1にまとめる。
210 ゲートスタック
220 ポリSiGe電極層
230 側壁スペーサ
240 絶縁層
260 ゲート誘電体
262 界面
264 バルク誘電体層
266 界面
Claims (13)
- 部分的に形成された集積回路のシリコン材料の表面上に膜を堆積させる方法であって、
前記シリコン材料の前記表面をプラズマの生成物に露出させて、Si−Si結合を破壊することにより、前記表面の終端を改質するステップと、
前記表面の終端を改質した後、その上に層を堆積させるステップとを含み、
前記プラズマの生成物が、窒素励起種を含み、
前記改質の後に、前記シリコン材料が、前記シリコン材料の改質された前記表面直下に1原子%未満且つ0原子%超の窒素を含み、
堆積させる前記ステップが、原子層堆積(ALD)を含む方法。 - 前記ALDが、シリコン窒化物よりも高い誘電率を有する酸化物を堆積させることを含むものである請求項1に記載の方法。
- 前記酸化物が、酸化アルミニウム、酸化ジルコニウム、酸化ハフニウム、バリウムストロンチウムチタネート、ストロンチウムビスマスタンタレートからなるグループから選択されたものである請求項2に記載の方法。
- 露出させることが、遠隔プラズマ源から表面へラジカルの流れを供給することを含むものである請求項1に記載の方法。
- 前記ラジカルの流れを、堆積の前に停止させるものである請求項4に記載の方法。
- 露出させることが、表面の下の材料のバルク特性に明らかな影響を及ぼさないものである請求項1に記載の方法。
- 露出させることが、1原子単層よりも大きい層を堆積させないものである請求項1に記載の方法。
- トランジスタゲートスタックを形成する方法であって、
半導体基板上にゲート誘電体を形成することと、
前記ゲート誘電体を窒素励起種源に露出させ、露出によってゲート誘電体の上面から10Åを超える深さにおいて、10原子%未満且つ0原子%超の窒素を組み込むことと、
前記ゲート誘電体を前記窒素励起種源に露出させた後、前記ゲート誘電体上にシリコン含有ゲート電極を堆積させることとを含み、
前記ゲート誘電体が形成される前に、前記半導体基板が窒素励起種源に露出される方法。 - 前記ゲート誘電体が、酸化アルミニウム、酸化ジルコニウム、酸化ハフニウム、酸化タンタル、バリウムストロンチウムチタネート、ストロンチウムビスマスタンタレートからなるグループから選択される材料を含むものである請求項8に記載の方法。
- 前記ゲート誘電体が、酸化ジルコニウムを含むものである請求項9に記載の方法。
- 前記半導体基板の前記表面の露出によって、10Å未満且つ0Å超のシリコン酸窒化物を形成するものである請求項8に記載の方法。
- 前記ゲート誘電体を形成することが、1原子層の堆積を含むものである請求項11に記載の方法。
- 前記シリコン含有ゲート電極を堆積させることが、化学気相成長によってシリコンゲルマニウム層を堆積させることを含む請求項8に記載の方法。
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US25369300P | 2000-11-24 | 2000-11-24 | |
US28358401P | 2001-04-13 | 2001-04-13 | |
US09/944,734 US6613695B2 (en) | 2000-11-24 | 2001-08-31 | Surface preparation prior to deposition |
PCT/US2001/044006 WO2002043115A2 (en) | 2000-11-24 | 2001-11-19 | Surface preparation prior to deposition |
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EP (1) | EP1344247A2 (ja) |
JP (1) | JP4281082B2 (ja) |
KR (1) | KR100856473B1 (ja) |
AU (1) | AU2002230471A1 (ja) |
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US6613695B2 (en) | 2003-09-02 |
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KR100856473B1 (ko) | 2008-09-04 |
JP2004523885A (ja) | 2004-08-05 |
KR20030051873A (ko) | 2003-06-25 |
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