JP5283233B2 - 応力強化mosトランジスタならびにその製造方法 - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 239000004065 semiconductor Substances 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 31
- 239000000758 substrate Substances 0.000 claims abstract description 28
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims description 60
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 58
- 229910052732 germanium Inorganic materials 0.000 claims description 57
- 229910052710 silicon Inorganic materials 0.000 claims description 32
- 239000010703 silicon Substances 0.000 claims description 32
- 239000013078 crystal Substances 0.000 claims description 26
- 238000005530 etching Methods 0.000 claims description 13
- 239000012212 insulator Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 abstract description 40
- 239000010410 layer Substances 0.000 description 50
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 31
- 125000006850 spacer group Chemical group 0.000 description 26
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 13
- 239000010408 film Substances 0.000 description 11
- 229910052581 Si3N4 Inorganic materials 0.000 description 8
- 125000004429 atom Chemical group 0.000 description 8
- 238000001020 plasma etching Methods 0.000 description 8
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 8
- 229910021332 silicide Inorganic materials 0.000 description 6
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 5
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 5
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000005468 ion implantation Methods 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- 239000000969 carrier Substances 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- -1 boron ions Chemical class 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
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- 239000007772 electrode material Substances 0.000 description 1
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- 125000005843 halogen group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- 230000006911 nucleation Effects 0.000 description 1
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- 229920005591 polysilicon Polymers 0.000 description 1
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- 239000010409 thin film Substances 0.000 description 1
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Description
Claims (8)
- 半導体基板[38]の表面[56]にチャネル領域[68]を有する応力強化MOSデバイス[30]の製造方法であって、
前記チャネル領域の近くの前記半導体基板内に、前記チャネル領域に対向する側面[78,80]および底面[76]をそれぞれ有するトレンチ[72,74]をエッチングにより形成するステップと、
前記トレンチの一部を埋めるために、前記トレンチ内に、第1の濃度のゲルマニウムを含む第1のSiGe層[82]を、前記側面において第1の成長速度で、前記底面において前記第1の成長速度よりも遅い第2の成長速度で、エピタキシャル成長させるステップと、
前記トレンチを埋めるために、前記第1の濃度よりも低い第2の濃度のゲルマニウムを含む第2のSiGe層[88]をエピタキシャル成長させるステップと、を含む方法。 - 前記半導体基板[38]は、(100)結晶面方位を有するシリコンを含む基板であり、前記チャネル領域[68]は[110]結晶方向に配向し、前記側面[78,80]は(011)結晶面方位を有し、第1の層をエピタキシャル成長させる前記ステップは、(100)結晶面におけるエピタキシャル成長速度よりも(011)結晶面におけるエピタキシャル成長速度を高くするように、エピタキシャル成長の条件を調整するステップを含む請求項1に記載の方法。
- 第1の層[82]をエピタキシャル成長させる前記ステップは、前記半導体基板に実質的に垂直なポテンシャルバイアスが印加されたプラズマ環境中で第1の層をエピタキシャル成長させるステップを含む請求項1に記載の方法。
- 応力強化MOSトランジスタ[30]の製造方法であって、
半導体基板[38]を覆うゲート絶縁物[54]を形成するステップと、
前記ゲート絶縁物を覆い、第1の端部[65]および第2の端部[66]を有するゲート電極[62]を形成するステップと、
前記半導体基板内に、前記第1の端部と整合され、第1の距離[69]だけ前記第1の端部から離間された第1のトレンチ[72]と、前記第2の端部と整合され、前記第1の距離だけ前記第2の端部から離間された第2のトレンチ[74]とをエッチングにより形成するステップと、
前記第1のトレンチおよび前記第2のトレンチ内に、第1の濃度のゲルマニウムを含み、前記第1のトレンチおよび前記第2のトレンチを埋めるのに十分な膜厚を有する第1のSiGe層[90]をエピタキシャル成長させるステップと、
前記第1の層内に、前記第1の側面と整合され、前記第1の距離よりも大きな第2の距離[97]だけ第1の側面から離間された第3のトレンチ[94]と、前記第2の側面と整合され、前記第2の距離だけ第2の側面から離間された第4のトレンチ[96]とをエッチングにより形成するステップと、
前記第3のトレンチおよび前記第4のトレンチ内に、前記第1の濃度よりも低い第2の濃度のゲルマニウムを含み、前記第3のトレンチおよび前記第4のトレンチを埋めるのに十分な第2の膜厚[95]を有する第2のSiGe層[100]をエピタキシャル成長させるステップと、を含む方法。 - 第1の層[90]をエピタキシャル成長させる前記ステップは、25〜40原子百分率のゲルマニウムを含むSiGeの層をエピタキシャル成長させるステップを含み、第2の層[100]をエピタキシャル成長させる前記ステップは、20原子百分率未満のゲルマニウムを含む第2のSiGe層をエピタキシャル成長させるステップを含む請求項4に記載の方法。
- 応力強化MOSトランジスタ[30]であって、
表面[56]を有する半導体基板[38]と、
前記半導体基板の前記表面にあるチャネル領域[68]と、
第1のゲルマニウム濃度を有し、前記半導体基板内に埋め込まれた第1のSiGe領域[82]と、
前記第1のゲルマニウム濃度よりも低い第2のゲルマニウム濃度を有し、前記第1のSiGe領域内に埋め込まれた第2のSiGe領域[88]と、を備え、
前記第1のSiGe領域は、前記半導体基板の底面[76]に隣接する底部[86]と、前記チャネル領域に隣接するとともに前記底部よりも厚い側面部[84]とを有し、
前記第2のSiGe領域は、前記第1のSiGe領域の前記底部[86]及び前記側面部[84]に隣接する、応力強化MOSトランジスタ。 - 前記第1のSiGe領域[82]は、25〜40原子百分率のゲルマニウム濃度を有する請求項6に記載の応力強化MOSトランジスタ。
- 前記第2のSiGe領域[88]は、20原子百分率未満のゲルマニウム濃度を有する請求項7に記載の応力強化MOSトランジスタ。
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US11/562,209 US7534689B2 (en) | 2006-11-21 | 2006-11-21 | Stress enhanced MOS transistor and methods for its fabrication |
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PCT/US2007/024034 WO2008063543A2 (en) | 2006-11-21 | 2007-11-16 | Stress enhanced mos transistor and methods for its fabrication |
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KR (1) | KR101386711B1 (ja) |
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US7696019B2 (en) * | 2006-03-09 | 2010-04-13 | Infineon Technologies Ag | Semiconductor devices and methods of manufacturing thereof |
US8278176B2 (en) | 2006-06-07 | 2012-10-02 | Asm America, Inc. | Selective epitaxial formation of semiconductor films |
US7504301B2 (en) * | 2006-09-28 | 2009-03-17 | Advanced Micro Devices, Inc. | Stressed field effect transistor and methods for its fabrication |
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