KR100754264B1 - 반도체 강유전체 기억 디바이스와 그 제조방법 - Google Patents
반도체 강유전체 기억 디바이스와 그 제조방법 Download PDFInfo
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- KR100754264B1 KR100754264B1 KR1020057002858A KR20057002858A KR100754264B1 KR 100754264 B1 KR100754264 B1 KR 100754264B1 KR 1020057002858 A KR1020057002858 A KR 1020057002858A KR 20057002858 A KR20057002858 A KR 20057002858A KR 100754264 B1 KR100754264 B1 KR 100754264B1
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- buffer layer
- semiconductor
- ferroelectric
- film
- insulator buffer
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 70
- 238000004519 manufacturing process Methods 0.000 title claims description 26
- 238000003860 storage Methods 0.000 title claims description 12
- 239000012212 insulator Substances 0.000 claims abstract description 84
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 14
- 239000010408 film Substances 0.000 claims description 91
- 238000000034 method Methods 0.000 claims description 68
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 55
- 239000000758 substrate Substances 0.000 claims description 47
- 230000015572 biosynthetic process Effects 0.000 claims description 45
- 238000000151 deposition Methods 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 20
- 230000008021 deposition Effects 0.000 claims description 20
- 239000001301 oxygen Substances 0.000 claims description 20
- 229910052760 oxygen Inorganic materials 0.000 claims description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims description 19
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 15
- 239000010409 thin film Substances 0.000 claims description 13
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 10
- 238000004381 surface treatment Methods 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 238000000137 annealing Methods 0.000 claims description 7
- 150000004767 nitrides Chemical class 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- MIQVEZFSDIJTMW-UHFFFAOYSA-N aluminum hafnium(4+) oxygen(2-) Chemical compound [O-2].[Al+3].[Hf+4] MIQVEZFSDIJTMW-UHFFFAOYSA-N 0.000 claims description 4
- 229910000449 hafnium oxide Inorganic materials 0.000 claims description 4
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 claims description 4
- 238000001947 vapour-phase growth Methods 0.000 claims 4
- 239000000470 constituent Substances 0.000 claims 1
- 230000015654 memory Effects 0.000 abstract description 17
- 230000010287 polarization Effects 0.000 abstract description 10
- 230000014759 maintenance of location Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 15
- 239000013078 crystal Substances 0.000 description 8
- 238000002425 crystallisation Methods 0.000 description 8
- 230000008025 crystallization Effects 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 6
- 230000008859 change Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 5
- 229910001882 dioxygen Inorganic materials 0.000 description 5
- 230000036962 time dependent Effects 0.000 description 5
- 238000005566 electron beam evaporation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000010408 sweeping Methods 0.000 description 4
- 238000005530 etching Methods 0.000 description 3
- 238000010884 ion-beam technique Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- 238000005389 semiconductor device fabrication Methods 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 238000007740 vapor deposition Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000005621 ferroelectricity Effects 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 230000007847 structural defect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910020684 PbZr Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- -1 TiN or TaN Chemical class 0.000 description 1
- 229910009580 YMnO Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000004549 pulsed laser deposition Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
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Abstract
Description
Claims (23)
- 소스 영역과 드레인 영역을 갖는 반도체 기판 또는 반도체 영역 상에, 절연체 버퍼층, 강유전체막 및 게이트 전극이 이 순서로 적층되어 있는 트랜지스터를 갖는 반도체 강유전체 기억 디바이스에 있어서,상기 절연체 버퍼층은 하프늄ㆍ알루미늄 산화물을 주성분으로 하는 절연막인 것을 특징으로 하는 반도체 강유전체 기억 디바이스.
- 제 1 항에 있어서,상기 절연체 버퍼층의 하프늄 원소와 알루미늄 원소의 구성비 Hf1-X : Al2X 을 나타내는 x 의 범위가 0〈x〈0.7 인 것을 특징으로 하는 반도체 강유전체 기억 디바이스.
- 제 1 항에 있어서,상기 절연체 버퍼층은 질소원소를 첨가물로 함유하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스.
- 제 3 항에 있어서,상기 질소원소의 함유량은 1 ×1019㎝-3 내지 1 ×1022㎝-3 의 범위에 있는 것 을 특징으로 하는 반도체 강유전체 기억 디바이스.
- 제 1 항에 있어서,상기 반도체 기판 또는 상기 반도체 영역과 상기 절연체 버퍼층 사이에, 산화막, 질화막 또는 산질화막이 삽입되어 있는 것을 특징으로 하는 반도체 강유전체 기억 디바이스.
- 소스 영역과 드레인 영역을 갖는 반도체 기판 또는 반도체 영역 상에, 절연체 버퍼층, 강유전체막 및 게이트 전극이 이 순서로 적층되어 있는 트랜지스터를 갖는 반도체 강유전체 기억 디바이스에 있어서,상기 절연체 버퍼층은 하프늄 산화물을 주성분으로 하는 절연막이고, 또한 질소원소를 첨가물로 함유하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스.
- 제 6 항에 있어서,상기 질소원소의 함유량은 1 ×1019㎝-3 내지 1 ×1022㎝-3 의 범위에 있는 것을 특징으로 하는 반도체 강유전체 기억 디바이스.
- 제 6 항에 있어서,상기 반도체 기판 또는 상기 반도체 영역과 상기 절연체 버퍼층 사이에, 산화막, 질화막 또는 산질화막이 삽입되어 있는 것을 특징으로 하는 반도체 강유전체 기억 디바이스.
- 소스 영역과 드레인 영역을 갖는 반도체 기판 또는 반도체 영역 상에, 하프늄ㆍ알루미늄 산화물을 주성분으로 하는 절연체 버퍼층, 강유전체막 및 게이트 전극이 이 순서로 적층되어 있는 트랜지스터를 갖는 반도체 강유전체 기억 디바이스의 제조방법으로서,반도체 표면 처리, 절연체 버퍼층 형성, 강유전체막 형성, 게이트 전극 형성 및 열처리공정을 포함하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 9 항에 있어서,상기 절연체 버퍼층 형성을, 질소 가스를 함유하는 분위기 중에서 수행하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 10 항에 있어서,상기 질소가스를 함유하는 분위기는, 질소와 산소의 몰비가 1:1∼1:10-7 의 혼합 가스 분위기인 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 9 항에 있어서,박막형성을 위한 진공 용기에 기판을 두고, 상기 용기로부터 상기 기판을 꺼내지 않고 연속하여 기상성장법에 의해 상기 절연체 버퍼층 및 상기 강유전체막을 형성하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 9 항에 있어서,박막형성을 위한 진공 용기에 기판을 두고, 상기 용기로부터 상기 기판을 꺼내지 않고 연속하여 펄스 레이저 퇴적법에 의해 상기 절연체 버퍼층 및 상기 강유전체막을 형성하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 9 항에 있어서,하프늄과 알루미늄을 동시에 공급하여 기상성장법에 의해 절연체 버퍼층을 형성하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 13 항에 있어서,하프늄과 알루미늄이 별도의 공급원으로부터 공급되는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 9 항에 있어서,하프늄과 알루미늄을 교대로 각각 1회 내지 복수회 공급하여, 기상성장법에 의해 절연체 버퍼층을 형성하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 16 항에 있어서,최초에 하프늄을 공급하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 9 항에 있어서,강유전체막 형성 사이에 강유전체막 형성을 위한 진공 용기 중, 강유전체막 형성 후 강유전체막 형성을 위한 진공 용기 중, 강유전체막 형성 후 게이트 전극 형성 전에 어닐링로 중 또는 게이트 전극 형성 후 어닐링로 중의 어느 하나의 타이밍 및 환경에서, 1회 이상 열처리하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 소스 영역과 드레인 영역을 갖는 반도체 기판 또는 반도체 영역 상에, 하프늄 산화물을 주성분으로 하는 절연체 버퍼층, 강유전체막 및 게이트 전극이 이 순서로 적층되어 있는 트랜지스터를 갖는 반도체 강유전체 기억 디바이스의 제조방법 으로서,반도체 표면 처리, 절연체 버퍼층 형성, 강유전체막 형성, 게이트 전극 형성 및 열처리공정을 포함하고,상기 절연체 버퍼층 형성을 질소 가스를 함유하는 분위기에서 수행하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 19 항에 있어서,상기 질소 가스를 함유하는 분위기는, 질소와 산소의 몰비가 1:1∼1:10-7 의 혼합 가스 분위기인 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 19 항에 있어서,박막형성을 위한 진공 용기에 기판을 두고, 상기 용기로부터 상기 기판을 꺼내지 않고 연속하여 기상성장법에 의해 상기 절연체 버퍼층 및 상기 강유전체막을 형성하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 19 항에 있어서,박막형성을 위한 진공 용기에 기판을 두고, 상기 용기로부터 상기 기판을 꺼내지 않고 연속하여 펄스 레이저 퇴적법에 의해 상기 절연체 버퍼층 및 상기 강유 전체막을 형성하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
- 제 19 항에 있어서,강유전체막 형성의 사이에 강유전체막 형성을 위한 진공 용기 중, 강유전체막 형성 후 강유전체막 형성을 위한 진공 용기 중, 강유전체막 형성 후 게이트 전극 형성 전에 어닐링로 중 또는 게이트 전극 형성 후 어닐링로 중의 어느 하나의 타이밍 및 환경에서, 1회 이상 열처리하는 것을 특징으로 하는 반도체 강유전체 기억 디바이스의 제조방법.
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JP4887481B2 (ja) | 2012-02-29 |
KR20050035887A (ko) | 2005-04-19 |
JP2004304143A (ja) | 2004-10-28 |
US20060017120A1 (en) | 2006-01-26 |
US7226795B2 (en) | 2007-06-05 |
AU2003254947A1 (en) | 2004-05-04 |
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