JP2005537670A - 異方性High−Kゲート誘電体を有するトランジスタエレメント - Google Patents
異方性High−Kゲート誘電体を有するトランジスタエレメント Download PDFInfo
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- 230000005669 field effect Effects 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 54
- 238000000034 method Methods 0.000 claims description 37
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 35
- 235000012239 silicon dioxide Nutrition 0.000 claims description 27
- 239000000377 silicon dioxide Substances 0.000 claims description 27
- 239000000758 substrate Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 24
- 239000003989 dielectric material Substances 0.000 claims description 17
- 239000004408 titanium dioxide Substances 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 14
- 238000000151 deposition Methods 0.000 claims description 13
- 238000000137 annealing Methods 0.000 claims description 11
- 230000008021 deposition Effects 0.000 claims description 11
- 230000004888 barrier function Effects 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 10
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 229910052914 metal silicate Inorganic materials 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 13
- 238000010168 coupling process Methods 0.000 description 13
- 238000005859 coupling reaction Methods 0.000 description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 11
- 239000010703 silicon Substances 0.000 description 11
- 239000002800 charge carrier Substances 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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- Insulated Gate Type Field-Effect Transistor (AREA)
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Abstract
Description
Claims (18)
- 活性領域上に形成され、high-k誘電体305を有するゲート絶縁層を有する電界効果トランジスタ300であって、前記ゲート絶縁層に垂直である前記high-k誘電体の誘電率は、前記ゲート絶縁層に平行である誘電率よりも高い、電界効果トランジスタ300。
- 前記ゲート絶縁層に垂直である前記誘電率と前記ゲート絶縁層に平行である前記誘電率との比率は1.2よりも高い、請求項1記載の電界効果トランジスタ300。
- 前記ゲート絶縁層のキャパシタンス等価厚は2nm未満である、請求項1記載の電界効果トランジスタ300。
- 前記ゲート絶縁層は少なくとも1つの金属酸化物、金属シリケート、及び強誘電体材料を有する、請求項1記載の電界効果トランジスタ。
- 前記ゲート絶縁層は二酸化チタンを有する、請求項4記載の電界効果トランジスタ。
- 前記二酸化チタンは正方晶系の形状である、請求項6記載の電界効果トランジスタ。
- 前記ゲート絶縁層は前記活性領域と前記high-k誘電体305との間に設けられるバリア層315を有する、請求項1記載の電界効果トランジスタ。
- 前記バリア層315は二酸化シリコン、窒化シリコンあるいはケイ酸ジルコニウムのうちの少なくとも1つを有する、請求項7記載の電界効果トランジスタ。
- 基板301上にhigh-kゲート絶縁層を形成する方法であって、
第一方向沿いに第一誘電率を有するとともに第二方向沿いに前記第一誘電率よりも高い第二誘電率を有する異方性誘電材料305をエピタキシャル成長させ、
少なくとも1つのプロセスパラメータを制御して、前記第二方向を前記基板の表面に実質的に垂直となるよう調整する、方法。 - 前記基板301をアニールし、前記誘電体材料の結晶性を制御する、請求項9記載の方法。
- 前記金属含有誘電体はチタン酸化物を有する、請求項9記載の方法。
- 誘電体を有する前記異方性のエピタキシャル成長は、約700−900℃の範囲の温度で実施される、請求項11記載の方法。
- high-k誘電体ゲート絶縁層を形成する方法であって、該方法は、
活性半導体領域が上に形成されている基板301を用意し、
誘電体層を形成するために異方性誘電体材料を蒸着し、
前記基板をアニールし、かつ
前記基板301の蒸着またはアニールのうちの少なくとも一方の少なくとも1つのプロセスパラメータを制御して、前記誘電体層に平行である第一誘電率が、前記誘電体層に垂直である第二誘電率より低くなるように、結晶方向を調整する、方法。 - 前記誘電体がチタン酸化物を有する、請求項13記載の方法。
- 前記異方性誘電体の蒸着が約700−900℃の範囲の室温で実施される、請求項13記載の方法。
- 前記アニールが600−800℃の範囲の温度で実施される、請求項13記載の方法。
- 約2nm未満のキャパシタンス等価厚を有するゲート絶縁層を形成する方法であって、該方法は、
少なくとも相異なる2方向で異なる誘電率を有した結晶性誘電体を選択し、
高誘電率に対応する方向が、前記基板301の表面に実質的に垂直になるように、基盤301に前記結晶性誘電体を形成するためにプロセスパラメータの設定を決定する、方法。 - 前記プロセスパラメータの設定が、蒸着パラメータまたはアニールパラメータのうちの少なくとも1つを含む、請求項17記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10240408A DE10240408A1 (de) | 2002-09-02 | 2002-09-02 | Transistorelement mit einem Anisotropen Gate-Dielektrikum MI großem ε |
US10/403,556 US6911404B2 (en) | 2002-09-02 | 2003-03-31 | Transistor element having an anisotropic high-k gate dielectric |
PCT/US2003/028219 WO2004021424A1 (en) | 2002-09-02 | 2003-08-29 | Transistor element having an anisotropic high-k gate dielectric |
Publications (2)
Publication Number | Publication Date |
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JP2005537670A true JP2005537670A (ja) | 2005-12-08 |
JP2005537670A5 JP2005537670A5 (ja) | 2006-10-05 |
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Application Number | Title | Priority Date | Filing Date |
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JP2004533030A Pending JP2005537670A (ja) | 2002-09-02 | 2003-08-29 | 異方性High−Kゲート誘電体を有するトランジスタエレメント |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1535316A1 (ja) |
JP (1) | JP2005537670A (ja) |
KR (1) | KR101020810B1 (ja) |
AU (1) | AU2003270452A1 (ja) |
WO (1) | WO2004021424A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009283850A (ja) * | 2008-05-26 | 2009-12-03 | Elpida Memory Inc | キャパシタ用絶縁膜及びその形成方法、並びにキャパシタ及び半導体装置 |
JP2011044577A (ja) * | 2009-08-21 | 2011-03-03 | Hitachi Kokusai Electric Inc | 半導体装置の製造方法 |
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- 2003-08-29 WO PCT/US2003/028219 patent/WO2004021424A1/en active Application Filing
- 2003-08-29 KR KR1020057003573A patent/KR101020810B1/ko not_active IP Right Cessation
- 2003-08-29 JP JP2004533030A patent/JP2005537670A/ja active Pending
- 2003-08-29 EP EP03752145A patent/EP1535316A1/en not_active Withdrawn
- 2003-08-29 AU AU2003270452A patent/AU2003270452A1/en not_active Abandoned
Patent Citations (6)
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JPS55102242A (en) * | 1978-11-20 | 1980-08-05 | Texas Instruments Inc | Method of forming titanium dioxide gate |
JPH04367262A (ja) * | 1991-06-14 | 1992-12-18 | Toshiba Corp | 半導体装置 |
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JP2000150817A (ja) * | 1998-11-17 | 2000-05-30 | Siemens Ag | 半導体装置とその形成方法 |
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JP2002016063A (ja) * | 2000-06-27 | 2002-01-18 | Toshiba Corp | 半導体装置及びその製造方法 |
Cited By (2)
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JP2009283850A (ja) * | 2008-05-26 | 2009-12-03 | Elpida Memory Inc | キャパシタ用絶縁膜及びその形成方法、並びにキャパシタ及び半導体装置 |
JP2011044577A (ja) * | 2009-08-21 | 2011-03-03 | Hitachi Kokusai Electric Inc | 半導体装置の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
AU2003270452A1 (en) | 2004-03-19 |
KR20050057085A (ko) | 2005-06-16 |
EP1535316A1 (en) | 2005-06-01 |
KR101020810B1 (ko) | 2011-03-09 |
WO2004021424A1 (en) | 2004-03-11 |
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