JP4133659B2 - CMOSアプリケーション用の多重高κゲート誘電体を堆積する方法 - Google Patents
CMOSアプリケーション用の多重高κゲート誘電体を堆積する方法 Download PDFInfo
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Description
Conley,Jr.らによる「Atomic Layer Deposition of Hafnium Oxide Using Anhydrous Hafnium Nitrate」(Electrochem.and Sol.State Lett.5(5)2002年5月)
12 フィールド酸化物領域
14 フィールド酸化物領域
16 H終端シリコン表面
Claims (17)
- 集積回路において高κ誘電材料の層を形成する方法であって、
シリコン基板を準備する工程と、
硝酸金属前駆物質を用いるALDを用いて第1の金属酸化物の層を堆積する工程と、
塩化金属前駆物質を用いるALDを用いて他の金属酸化物の層を堆積する工程と、
該集積回路を完成させる工程と
を包含する、方法。 - 前記準備する工程は、前記シリコン基板のH終端表面を形成する工程を含む、請求項1に記載の方法。
- 前記形成する工程は、前記シリコン表面をHFにより露出させる工程を含む、請求項2に記載の方法。
- 前記第1の金属酸化物の層を堆積する工程は、1〜5回のALDサイクルを用いて、金属酸化物の層を堆積する工程を含む、請求項1に記載の方法。
- 前記他の金属酸化物の層を堆積する工程は、複数のALDサイクルを用いて、金属酸化物の層を堆積して、所望の金属酸化物層厚を得る工程を含む、請求項1に記載の方法。
- HfO2、ZrO2、Gd2O3、La2O3、CeO2、TiO2、Y2O3、Ta2O5、およびAl2O3からなる金属酸化物の群から選択される、前記シリコン基板上に堆積される金属酸化物を選択する工程を含む、請求項1に記載の方法。
- 前記第1の金属酸化物の層を堆積する工程は、0.1nm〜1.5nmの間の厚さの最初の金属酸化物の層を堆積する工程を含む、請求項1に記載の方法。
- 前記他の金属酸化物の層を堆積する工程は、3nm〜10nmの間の厚さの金属酸化物の層を堆積する工程を含む、請求項1に記載の方法。
- 集積回路において高κ誘電ゲート酸化物の層を形成する方法であって、
シリコン基板を準備する工程であって、該シリコン基板のH終端表面を形成する工程を含む、工程と、
硝酸金属前駆物質を用いるALDを1〜5回用いて第1の金属酸化物の層を堆積して、所望の金属酸化物層厚を得る工程と、
塩化金属前駆物質を用いるALDを複数回用いて他の金属酸化物の層を堆積する工程と、
該集積回路を完成させる工程と
を包含する、方法。 - 前記形成する工程は、前記シリコン表面をHFにより露出させる工程を含む、請求項9に記載の方法。
- HfO2、ZrO2、Gd2O3、La2O3、CeO2、TiO2、Y2O3、Ta2O5、およびAl2O3からなる金属酸化物の群から選択される、前記シリコン基板上に堆積される金属酸化物を選択する工程を含む、請求項9に記載の方法。
- 前記第1の金属酸化物の層を堆積する工程は、0.1nm〜1.5nmの間の厚さの最初の金属酸化物の層を堆積する工程を含む、請求項9に記載の方法。
- 前記他の金属酸化物の層を堆積する工程は、3nm〜10nmの間の厚さの金属酸化物の層を堆積する工程を含む、請求項9に記載の方法。
- 集積回路においてHfO2高κ誘電ゲート酸化物の層を形成する方法であって、
シリコン基板を準備する工程であって、該シリコン基板のH終端表面を形成する工程を含む、工程と、
Hf(NO3)4前駆物質を用いるALDを1〜5回用いて第1のHfO2金属酸化物の層を堆積して、所望の金属酸化物層厚を得る工程と、
HfCl4前駆物質を用いるALDを複数回用いて他のHfO2の層を堆積する工程と、
該集積回路を完成させる工程と
を包含する、方法。 - 前記形成する工程は、前記シリコン表面をHFに露出させる工程を含む、請求項14に記載の方法。
- 前記第1の金属酸化物の層を堆積する工程は、0.1nm〜1.5nmの間の厚さの最初の金属酸化物の層を堆積する工程を含む、請求項14に記載の方法。
- 前記他の金属酸化物の層を堆積する工程は、3nm〜10nmの間の厚さの金属酸化物の層を堆積する工程を含む、請求項14に記載の方法。
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| US10/286,100 US6686212B1 (en) | 2002-10-31 | 2002-10-31 | Method to deposit a stacked high-κ gate dielectric for CMOS applications |
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| JP4133659B2 true JP4133659B2 (ja) | 2008-08-13 |
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| US (1) | US6686212B1 (ja) |
| JP (1) | JP4133659B2 (ja) |
| KR (1) | KR100538677B1 (ja) |
| TW (1) | TWI231572B (ja) |
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| US7192892B2 (en) * | 2003-03-04 | 2007-03-20 | Micron Technology, Inc. | Atomic layer deposited dielectric layers |
| US7135369B2 (en) * | 2003-03-31 | 2006-11-14 | Micron Technology, Inc. | Atomic layer deposited ZrAlxOy dielectric layers including Zr4AlO9 |
| US7442415B2 (en) * | 2003-04-11 | 2008-10-28 | Sharp Laboratories Of America, Inc. | Modulated temperature method of atomic layer deposition (ALD) of high dielectric constant films |
| US7183186B2 (en) * | 2003-04-22 | 2007-02-27 | Micro Technology, Inc. | Atomic layer deposited ZrTiO4 films |
| US7192824B2 (en) * | 2003-06-24 | 2007-03-20 | Micron Technology, Inc. | Lanthanide oxide / hafnium oxide dielectric layers |
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| US7687409B2 (en) | 2005-03-29 | 2010-03-30 | Micron Technology, Inc. | Atomic layer deposited titanium silicon oxide films |
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| JP2005534173A (ja) * | 2002-07-19 | 2005-11-10 | アヴィザ テクノロジー インコーポレイテッド | 金属酸窒化物及び金属シリコン酸窒化物の金属・有機化学気相成長法及び原子層蒸着法 |
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| US6686212B1 (en) | 2004-02-03 |
| KR20040038608A (ko) | 2004-05-08 |
| JP2004153238A (ja) | 2004-05-27 |
| TW200406883A (en) | 2004-05-01 |
| KR100538677B1 (ko) | 2005-12-23 |
| TWI231572B (en) | 2005-04-21 |
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