JP2007504652A - 窒化シリコン酸化物ゲート誘電体を製造する方法 - Google Patents
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Abstract
【解決手段】 基板を準備するステップと、該基板の上面に二酸化シリコン層を形成するステップと、還元雰囲気内でプラズマ窒化を実行し、該二酸化シリコン層を酸窒化シリコン層に変換するステップとを含む、ゲート誘電体層を製造する方法である。このように形成された誘電体層を、MOSFETの製造において用いることができる。
【選択図】 図6
Description
Claims (30)
- ゲート誘電体層を製造する方法であって、
基板を準備するステップと、
前記基板の上面に二酸化シリコン層を形成するステップと、
還元雰囲気内でプラズマ窒化を実行し、前記二酸化シリコン層を酸窒化シリコン層に変換するステップと
を含む方法。 - プラズマ窒化を実行する前記ステップが、リモートプラズマ窒化プロセスを用いて実行される、請求項1に記載の方法。
- プラズマ窒化を実行する前記ステップが、リモートプラズマ窒化ツールの第1の吸気口を通して導入される窒素及び不活性ガス・プラズマ、並びに前記リモートプラズマ窒化ツールの第2の吸気口を通して導入される中性還元ガスを用いて実行される、請求項1に記載の方法。
- 前記不活性ガスがヘリウムであり、前記還元ガスが、水素、アンモニア、水素と窒素の混合物、アンモニアと窒素の混合物、水素とアンモニアと窒素の混合物、重水素、重水素化アンモニア、重水素と窒素の混合物、重水素化アンモニアと窒素の混合物、重水素と重水素化アンモニアと窒素の混合物、又は、重水素とアンモニアと窒素の混合物である、請求項3に記載の方法。
- プラズマ窒化を実行する前記ステップが、窒素、不活性ガス及び還元ガスを含むプラズマを用いて実行される、請求項1に記載の方法。
- 前記不活性ガスがヘリウムであり、前記還元ガスが水素である、請求項5に記載の方法。
- 前記基板がバルクシリコン又はシリコン・オン・インシュレータ基板を含み、前記二酸化シリコン層を形成する前記ステップが、空気又は酸素における自然酸化物の成長、熱酸化、急速熱酸化、化学気相成長、及び酸化洗浄プロセスからなる群から選択されるプロセスによって形成される、請求項1に記載の方法。
- 前記二酸化シリコン層が約8Åから23Åまでの厚さを有する、請求項1に記載の方法。
- 前記酸窒化シリコンが約8Åから24Åまでの厚さを有する、請求項1に記載の方法。
- 前記酸窒化シリコン層が約2パーセントから20パーセントまでの間の窒素を含む、請求項1に記載の方法。
- 前記酸窒化シリコン層内の窒素濃度が、約1E21atm/cm3から1E22atm/cm3までの間である、請求項1に記載の方法。
- プラズマ窒化を実行する前記ステップが、約1E14atm/cm2から5E14atm/cm2までの間の窒素ドーズ量を前記二酸化シリコン層に与える、請求項1に記載の方法。
- 前記酸窒化シリコン層が、前記二酸化シリコン層の厚さより約0から35%大きい厚さを有する、請求項1に記載の方法。
- 前記基板の中央から端部までの前記酸窒化シリコン層の平均厚の変化が、約1/2オングストローム・シグマより大きくない、請求項1に記載の方法。
- 前記基板の中央から端部までの前記酸窒化シリコン層の窒素濃度の変化が、約25%より大きくない、請求項1に記載の方法。
- MOSFETを製造する方法であって、
少なくとも最上部のシリコン層を有する半導体基板を準備するステップと、
前記半導体基板の上面に二酸化シリコン層を形成するステップと、
還元雰囲気内でプラズマ窒化を実行し、前記二酸化シリコン層を酸窒化シリコン層に変換するステップと、
前記半導体基板内のチャネル領域の上に位置合わせされた前記酸窒化シリコン層上にポリシリコン・ゲートを形成するステップと、
前記ポリシリコン・ゲートに位置合わせされたソース/ドレイン領域を前記半導体基板内に形成するステップと
を含む方法。 - プラズマ窒化を実行する前記ステップが、リモートプラズマ窒化プロセスを用いて実行される、請求項16に記載の方法。
- プラズマ窒化を実行する前記ステップが、リモートプラズマ窒化ツールの第1の吸気口を通して導入される窒素及び不活性ガス・プラズマ、並びに前記リモートプラズマ窒化ツールの第2の吸気口を通して導入される中性還元ガスを用いて実行される、請求項16に記載の方法。
- 前記不活性ガスがヘリウムであり、前記還元ガスが、水素、アンモニア、水素と窒素の混合物、アンモニアと窒素の混合物、水素とアンモニアと窒素の混合物、重水素、重水素化アンモニア、重水素と窒素の混合物、重水素化アンモニアと窒素の混合物、重水素と重水素化アンモニアと窒素の混合物、又は、重水素とアンモニアと窒素の混合物である、請求項18に記載の方法。
- プラズマ窒化を実行する前記ステップが窒素、不活性ガス及び還元ガスを含むプラズマを用いて実行される、請求項16に記載の方法。
- 前記不活性ガスがヘリウムであり、前記還元ガスが水素である、請求項20に記載の方法。
- 前記基板がバルクシリコン又はシリコン・オン・インシュレータ基板を含み、前記二酸化シリコン層を形成する前記ステップが、空気又は酸素における自然酸化物の成長、熱酸化、急速熱酸化、化学気相成長、及び酸化洗浄プロセスからなる群から選択されたプロセスによって形成される、請求項16に記載の方法。
- 前記二酸化シリコン層が約8Åから23Åまでの厚さを有する、請求項16に記載の方法。
- 前記酸窒化シリコンが約8Åから24Åまでの厚さを有する、請求項16に記載の方法。
- 前記酸窒化シリコン層が約2パーセントから20パーセントまでの間の窒素を含む、請求項16に記載の方法。
- 前記酸窒化シリコン層内の窒素濃度が、約1E21atm/cm3から1E22atm/cm3までの間である、請求項16に記載の方法。
- プラズマ窒化を実行する前記ステップが、約1E14atm/cm2から5E14atm/cm2までの間の窒素ドーズ量を前記二酸化シリコン層に与える、請求項16に記載の方法。
- 前記酸窒化シリコン層が、前記二酸化シリコン層の厚さより約0から35%大きい厚さを有する、請求項16に記載の方法。
- 前記基板の中央から端部までの前記酸窒化シリコン層の平均厚の変化が、約1/2オングストローム・シグマより大きくない、請求項16に記載の方法。
- 前記基板の中央から端部までの前記酸窒化シリコン層の窒素濃度の変化が、約25%より大きくない、請求項16に記載の方法。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/604,905 US7291568B2 (en) | 2003-08-26 | 2003-08-26 | Method for fabricating a nitrided silicon-oxide gate dielectric |
| PCT/US2004/027740 WO2005020291A2 (en) | 2003-08-26 | 2004-08-26 | Method for fabricating a nitrided silicon-oxide gate dielectric |
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| JP2007504652A true JP2007504652A (ja) | 2007-03-01 |
| JP2007504652A5 JP2007504652A5 (ja) | 2007-10-11 |
| JP4617306B2 JP4617306B2 (ja) | 2011-01-26 |
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| JP2006524848A Expired - Fee Related JP4617306B2 (ja) | 2003-08-26 | 2004-08-26 | 窒化シリコン酸化物ゲート誘電体を製造する方法 |
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| Country | Link |
|---|---|
| US (2) | US7291568B2 (ja) |
| EP (1) | EP1661163A4 (ja) |
| JP (1) | JP4617306B2 (ja) |
| KR (1) | KR100843496B1 (ja) |
| CN (1) | CN1894781B (ja) |
| TW (1) | TWI305383B (ja) |
| WO (1) | WO2005020291A2 (ja) |
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| JP2016111294A (ja) * | 2014-12-10 | 2016-06-20 | 住友電気工業株式会社 | 半導体受光素子を作製する方法 |
| JPWO2014196107A1 (ja) * | 2013-06-04 | 2017-02-23 | 株式会社Joled | 薄膜トランジスタ素子とその製造方法及び表示装置 |
| JP2024508308A (ja) * | 2021-03-04 | 2024-02-26 | アプライド マテリアルズ インコーポレイテッド | デバイスのパフォーマンスを向上させるための処理 |
| WO2024185520A1 (ja) * | 2023-03-06 | 2024-09-12 | 東京エレクトロン株式会社 | 酸化膜を還元する方法、装置、及び基板を処理するシステム |
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| KR100718835B1 (ko) | 2005-09-13 | 2007-05-16 | 삼성전자주식회사 | 반도체 모스 트랜지스터와 그 제조 방법 |
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| JP7587716B2 (ja) | 2021-03-04 | 2024-11-20 | アプライド マテリアルズ インコーポレイテッド | デバイスのパフォーマンスを向上させるための処理 |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP4617306B2 (ja) | 2011-01-26 |
| CN1894781A (zh) | 2007-01-10 |
| US8709887B2 (en) | 2014-04-29 |
| CN1894781B (zh) | 2010-05-05 |
| US20050048705A1 (en) | 2005-03-03 |
| TW200514164A (en) | 2005-04-16 |
| WO2005020291A3 (en) | 2006-05-18 |
| KR20060066069A (ko) | 2006-06-15 |
| TWI305383B (en) | 2009-01-11 |
| EP1661163A2 (en) | 2006-05-31 |
| WO2005020291A2 (en) | 2005-03-03 |
| US7291568B2 (en) | 2007-11-06 |
| EP1661163A4 (en) | 2008-08-06 |
| US20080014692A1 (en) | 2008-01-17 |
| KR100843496B1 (ko) | 2008-07-04 |
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