JP5105627B2 - 複数のアニールステップを用いた酸窒化シリコンゲート誘電体の形成 - Google Patents
複数のアニールステップを用いた酸窒化シリコンゲート誘電体の形成 Download PDFInfo
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- JP5105627B2 JP5105627B2 JP2009504392A JP2009504392A JP5105627B2 JP 5105627 B2 JP5105627 B2 JP 5105627B2 JP 2009504392 A JP2009504392 A JP 2009504392A JP 2009504392 A JP2009504392 A JP 2009504392A JP 5105627 B2 JP5105627 B2 JP 5105627B2
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- 238000000137 annealing Methods 0.000 title claims description 47
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims description 27
- 229910052710 silicon Inorganic materials 0.000 title claims description 27
- 239000010703 silicon Substances 0.000 title claims description 27
- 230000015572 biosynthetic process Effects 0.000 title description 6
- 238000000034 method Methods 0.000 claims description 43
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 38
- 239000001301 oxygen Substances 0.000 claims description 38
- 229910052760 oxygen Inorganic materials 0.000 claims description 38
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 23
- 239000000758 substrate Substances 0.000 claims description 15
- 230000001590 oxidative effect Effects 0.000 claims description 12
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 10
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 8
- 239000004065 semiconductor Substances 0.000 claims description 8
- 239000001272 nitrous oxide Substances 0.000 claims description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- 229910001882 dioxygen Inorganic materials 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims 2
- 229910052757 nitrogen Inorganic materials 0.000 description 14
- 229910004298 SiO 2 Inorganic materials 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 150000004767 nitrides Chemical class 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000004151 rapid thermal annealing Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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Description
[0001]本発明の実施形態は、一般的には、酸窒化シリコン膜を形成することを含む半導体処理に関する。より詳細には、本発明は、プラズマ窒化物形成と二つのステップのアニールプロセスを用いた酸窒化シリコン膜を形成する方法に関する。
[0002]集積回路やトランジスタのデバイスの形が縮小するにつれて、トランジスタが必要とするゲート駆動電流に増加してきた。ゲート静電容量が増加するにつれて、トランジスタのゲート駆動電流も増加すること、また、トランジスタのゲート静電容量が、k*A/d(ここで、kは(通常は酸化シリコンである)ゲート誘電体の誘電率であり、dは誘電体の厚さであり、Aはゲートコンタクト面積である)に等しいことは、既知である。従って、ゲート誘電体の誘電体の厚さを減少させることと誘電率を増加させることが、ゲート静電容量と駆動電流を増加させる二つの方法である。
号に開示されており、この開示内容は本明細書に援用されている。
テップで酸素を添加しすぎると、過剰酸化が引き起こされるために望ましくない。
Claims (15)
- 半導体基板を処理する方法であって、
酸窒化シリコン膜を形成するステップと;
1ミリトール〜100ミリトールの酸化ガス分圧を与える酸化ガス及び窒素ガスの存在下で該酸窒化シリコン膜をアニールする第一アニールステップと;
0.5トール〜3.0トールの酸素分圧を与える流量の酸素ガスで該酸窒化シリコン膜をアニールする第二アニールステップと;
を含む、前記方法。 - 酸窒化シリコン膜を形成するステップが、プラズマ窒化物形成によって行われる、請求項1に記載の方法。
- 該第一アニールステップが、700℃以上で行われる、請求項1に記載の方法。
- 該第一アニールステップが、1000℃〜1100℃で行われる、請求項3に記載の方法。
- 該第一アニールステップが、1秒〜120秒間行われる、請求項1に記載の方法。
- 該第一アニールステップが、100ミリトール〜800トールのチャンバ圧で行われる、請求項1に記載の方法。
- 該酸化ガスが、酸素、亜酸化窒素、一酸化窒素、及びオゾンより選ばれるガスである、請求項1に記載の方法。
- 該酸化ガスが、酸素である、請求項1に記載の方法。
- 該第一アニールステップが、該酸窒化シリコン膜を還元ガスでアニールする工程を更に含む、請求項1に記載の方法。
- 該還元ガスが、水素である、請求項9に記載の方法。
- 該第一アニールステップが、該酸窒化シリコン膜を不活性ガスでアニールする工程を更に含む、請求項1に記載の方法。
- 該第二アニールステップが、900℃〜1100℃で行われる、請求項1に記載の方法。
- 該第二アニールステップが、10ミリトール〜100トールの圧力で行われる、請求項1に記載の方法。
- 該第二アニールステップが、1秒〜120秒間行われる、請求項1に記載の方法。
- チャンバ内に配置され且つ酸窒化シリコン膜を有する半導体基板をアニールする方法であって、
酸化ガス及び窒素ガスを含み、1〜100ミリトールの酸化ガス分圧を与えるガス流を1000℃〜1100℃のチャンバ温度で該チャンバに流すステップであって、該酸化ガスが、酸素、亜酸化窒素、一酸化窒素及びオゾンより選ばれるガスである、第一フローステップと;
0.5トール〜3.0トールの酸素分圧を与える流量の酸素ガスを該チャンバに流す、第二フローステップと;
を含み、
前記第一フローステップが、前記第二フローステップより高い温度と高いチャンバ圧で行われ、
前記第一フローステップが、100ミリトール〜800トールのチャンバ圧で行われる、方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/397,010 US7429540B2 (en) | 2003-03-07 | 2006-04-03 | Silicon oxynitride gate dielectric formation using multiple annealing steps |
US11/397,010 | 2006-04-03 | ||
PCT/US2007/065650 WO2007118031A2 (en) | 2006-04-03 | 2007-03-30 | Silicon oxynitride gate dielectric formation using multiple annealing steps |
Publications (3)
Publication Number | Publication Date |
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JP2009532915A JP2009532915A (ja) | 2009-09-10 |
JP2009532915A5 JP2009532915A5 (ja) | 2012-10-11 |
JP5105627B2 true JP5105627B2 (ja) | 2012-12-26 |
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Application Number | Title | Priority Date | Filing Date |
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JP2009504392A Active JP5105627B2 (ja) | 2006-04-03 | 2007-03-30 | 複数のアニールステップを用いた酸窒化シリコンゲート誘電体の形成 |
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US (1) | US7429540B2 (ja) |
JP (1) | JP5105627B2 (ja) |
KR (1) | KR101014938B1 (ja) |
CN (1) | CN101416286B (ja) |
TW (1) | TWI375276B (ja) |
WO (1) | WO2007118031A2 (ja) |
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US20050252449A1 (en) | 2004-05-12 | 2005-11-17 | Nguyen Son T | Control of gas flow and delivery to suppress the formation of particles in an MOCVD/ALD system |
US8119210B2 (en) | 2004-05-21 | 2012-02-21 | Applied Materials, Inc. | Formation of a silicon oxynitride layer on a high-k dielectric material |
US7678710B2 (en) | 2006-03-09 | 2010-03-16 | Applied Materials, Inc. | Method and apparatus for fabricating a high dielectric constant transistor gate using a low energy plasma system |
US7645710B2 (en) | 2006-03-09 | 2010-01-12 | Applied Materials, Inc. | Method and apparatus for fabricating a high dielectric constant transistor gate using a low energy plasma system |
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CN101416286B (zh) | 2012-12-12 |
TW200802608A (en) | 2008-01-01 |
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