JP4992710B2 - Mosトランジスタ及びその製造方法 - Google Patents
Mosトランジスタ及びその製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 23
- 239000004065 semiconductor Substances 0.000 claims description 107
- 238000000034 method Methods 0.000 claims description 27
- 238000009792 diffusion process Methods 0.000 claims description 14
- 238000000137 annealing Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 151
- 239000010408 film Substances 0.000 description 72
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 43
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 28
- 239000000758 substrate Substances 0.000 description 23
- 239000012535 impurity Substances 0.000 description 20
- 229910052814 silicon oxide Inorganic materials 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 230000005684 electric field Effects 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 238000005229 chemical vapour deposition Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000005468 ion implantation Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 5
- 229920005591 polysilicon Polymers 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 4
- 229910021332 silicide Inorganic materials 0.000 description 4
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910052785 arsenic Inorganic materials 0.000 description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- PEUPIGGLJVUNEU-UHFFFAOYSA-N nickel silicon Chemical compound [Si].[Ni] PEUPIGGLJVUNEU-UHFFFAOYSA-N 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- ODUCDPQEXGNKDN-UHFFFAOYSA-N Nitrogen oxide(NO) Natural products O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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Description
Sophie Verdonckt-Vandebroek et al,"SiGe-Channel Heterojunctionp-MOSFET`s", IEEE TRANSACTIONS ON ELECTRON DEVICES, Vol.41,p.90(1994)
Si層にこれより大きい格子定数を持つSiGe層を導入した歪み構造のMOSトランジスタにおいて、通常、図1に示す様に、SiGe層102とゲート絶縁膜104との間にキャップ膜となるSi層103が形成される。このSi層103は、ゲート絶縁膜104とSiGe層102とが直接接するとゲート絶縁膜104の界面にゲルマニウム(Ge)に起因する界面準位や固定電荷が増加する現象を回避するために挿入される。Geに起因する界面準位や固定電荷(負電荷)の形成は、このMOS構造デバイスにおけるフラットバンド電圧Vfbのシフト、すなわち、Vfbの絶対値が大きい方にシフトさせることが知られており、キャップ膜としてのSi層103の導入によりフラットバンド電圧Vfbのシフトが回避されることが従来述べられている(例えば、特許文献1)。
本発明の第1実施形態になる半導体装置及びその製造方法を、図3ないし図5を用いて説明する。
上述した、各層の界面ないしその近傍に、正、負の固定電荷の導入によって生じるバンド構造の変化、その結果として、フラットバンドのシフトと、それに伴うしきい値電圧のシフトを組合せて用いることにより、SiGe歪みMOSトランジスタのしきい値電圧の制御やさらに移動度の劣化の抑制を効果的に行うことができる。
Claims (4)
- MOSトランジスタであって、
第1の半導体層上に、
前記第1の半導体層の価電子帯端エネルギ値よりも小さい価電子帯端エネルギ値を有しかつ前記第1の半導体層の移動度よりも大きい移動度を有する第2の半導体層と、
前記第2の半導体層の価電子帯端エネルギ値よりも大きい価電子帯端エネルギ値を有する第3の半導体層と、
絶縁層及び当該絶縁層上のゲート電極とが順次積層され、かつ、前記第1の半導体層と前記第2の半導体層の界面ないしその近傍に正の固定電荷と、前記第2の半導体層と前記第3の半導体層の界面ないしその近傍に負の固定電荷と、前記第3の半導体層と前記絶縁層の界面ないしその近傍に正の電荷とを有し、前記の電荷の総和は正の値であることを特徴とするMOSトランジスタ。 - MOSトランジスタの製造方法であって、
第1の半導体層上に、前記第1の半導体層の価電子帯端エネルギ値よりも小さい価電子帯端エネルギ値を有しかつ前記第1の半導体層の移動度よりも大きい移動度を有する第2の半導体層を形成する工程と、
前記第2の半導体層上に前記第2の半導体層の価電子帯端エネルギ値よりも大きい価電子帯端エネルギ値を有する第3の半導体層を形成する工程と、
前記第3の半導体層上に絶縁層を形成して半導体積層構造を形成する工程と、
前記半導体積層構造の前記第1の半導体層と前記第2の半導体層の界面ないしその近傍に第1の正の固定電荷を導入する工程と、
前記第2の半導体層と前記第3の半導体層の界面ないしその近傍に負の固定電荷を導入する工程と、
前記第3の半導体層と前記絶縁層の界面ないしその近傍に第2の正の電荷の導入を導入する工程と、
かつ前記第1の正の固定電荷、前記第2の正の固定電荷および前記負の固定電荷の総和が正の値とするように制御し、前記絶縁層上にゲート電極を形成する工程と
を有することを特徴とするMOSトランジスタの製造方法。 - 前記負の固定電荷は前記第2の半導体層を構成する元素の拡散に伴って導入され、前記正の固定電子は外部からの窒素原子の付加に伴って導入されることを特徴とする請求項2に記載のMOSトランジスタの製造方法。
- 前記窒素原子の付加は、NOガスアニール処理によって行うことを特徴とする請求項3に記載のMOSトランジスタの製造方法。
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PCT/JP2005/004314 WO2006097977A1 (ja) | 2005-03-11 | 2005-03-11 | 半導体装置及びその製造方法 |
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JP4992710B2 true JP4992710B2 (ja) | 2012-08-08 |
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US (2) | US8188553B2 (ja) |
JP (1) | JP4992710B2 (ja) |
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WO (1) | WO2006097977A1 (ja) |
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US8237229B2 (en) * | 2008-05-22 | 2012-08-07 | Stmicroelectronics Inc. | Method and apparatus for buried-channel semiconductor device |
JP5446281B2 (ja) * | 2008-08-01 | 2014-03-19 | ソニー株式会社 | 固体撮像装置、その製造方法および撮像装置 |
JP5350815B2 (ja) * | 2009-01-22 | 2013-11-27 | 株式会社東芝 | 半導体装置 |
US8440547B2 (en) * | 2009-02-09 | 2013-05-14 | International Business Machines Corporation | Method and structure for PMOS devices with high K metal gate integration and SiGe channel engineering |
JP5515613B2 (ja) * | 2009-10-22 | 2014-06-11 | 株式会社豊田中央研究所 | 半導体光応答体 |
GB2497257B (en) * | 2010-09-28 | 2013-11-06 | Ibm | Semiconductor device with a gate stack |
US8461034B2 (en) | 2010-10-20 | 2013-06-11 | International Business Machines Corporation | Localized implant into active region for enhanced stress |
US8828813B2 (en) * | 2012-04-13 | 2014-09-09 | Taiwan Semiconductor Manufacturing Co., Ltd. | Replacement channels |
EP3671813A1 (en) * | 2018-12-21 | 2020-06-24 | IMEC vzw | Si-passivated ge gate stack |
CN112908861B (zh) * | 2021-01-25 | 2022-03-08 | 长鑫存储技术有限公司 | 半导体结构的制造方法及半导体结构 |
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DE60042666D1 (de) * | 1999-01-14 | 2009-09-17 | Panasonic Corp | Halbleiterbauelement und Verfahren zu dessen Herstellung |
US7273800B2 (en) * | 2004-11-01 | 2007-09-25 | International Business Machines Corporation | Hetero-integrated strained silicon n- and p-MOSFETs |
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JPWO2006097977A1 (ja) | 2008-08-21 |
US20080048210A1 (en) | 2008-02-28 |
WO2006097977A1 (ja) | 2006-09-21 |
CN100583450C (zh) | 2010-01-20 |
US8188553B2 (en) | 2012-05-29 |
US8497178B2 (en) | 2013-07-30 |
CN101142685A (zh) | 2008-03-12 |
US20120208354A1 (en) | 2012-08-16 |
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