KR101060617B1 - 비휘발성 메모리 소자 및 그 제조 방법 - Google Patents
비휘발성 메모리 소자 및 그 제조 방법 Download PDFInfo
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- KR101060617B1 KR101060617B1 KR1020080134788A KR20080134788A KR101060617B1 KR 101060617 B1 KR101060617 B1 KR 101060617B1 KR 1020080134788 A KR1020080134788 A KR 1020080134788A KR 20080134788 A KR20080134788 A KR 20080134788A KR 101060617 B1 KR101060617 B1 KR 101060617B1
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 86
- 230000000903 blocking effect Effects 0.000 claims abstract description 29
- 239000000758 substrate Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 58
- 239000007789 gas Substances 0.000 claims description 15
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 13
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 13
- 238000005229 chemical vapour deposition Methods 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 8
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 8
- 229920005591 polysilicon Polymers 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims description 4
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-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
- 229910000484 niobium oxide Inorganic materials 0.000 claims description 4
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 229910052732 germanium Inorganic materials 0.000 claims description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005530 etching Methods 0.000 claims 1
- 230000014759 maintenance of location Effects 0.000 abstract description 14
- 238000005036 potential barrier Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 11
- 230000005641 tunneling Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 230000005516 deep trap Effects 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 238000013500 data storage Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910003855 HfAlO Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 1
- -1 tungsten nitride Chemical class 0.000 description 1
- 229910021342 tungsten silicide Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/788—Field effect transistors with field effect produced by an insulated gate with floating gate
- H01L29/7881—Programmable transistors with only two possible levels of programmation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42324—Gate electrodes for transistors with a floating gate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/4234—Gate electrodes for transistors with charge trapping gate insulator
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/51—Insulating materials associated therewith
- H01L29/517—Insulating materials associated therewith the insulating material comprising a metallic compound, e.g. metal oxide, metal silicate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66833—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a charge trapping gate insulator, e.g. MNOS transistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/792—Field effect transistors with field effect produced by an insulated gate with charge trapping gate insulator, e.g. MNOS-memory transistors
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Non-Volatile Memory (AREA)
- Semiconductor Memories (AREA)
Abstract
Description
Claims (31)
- 기판 상에 형성되는 터널절연막;상기 터널절연막 상에 형성되고, 순차적으로 적층된 제1 전하트랩막, 전하저장막, 및 제2 전하트랩막을 포함하는 전하포획막;상기 전하포획막 상에 형성되는 전하차단막; 및상기 전하차단막 상에 형성되는 게이트 전극을 포함하는 비휘발성 메모리 소자.
- 삭제
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- 제 1 항에 있어서,상기 전하포획막 측벽에 형성된 산화막을 더 포함하는 비휘발성 메모리 소자.
- 제 1 항에 있어서,상기 전하저장막은,상기 제1 및 제2 전하트랩막보다 밴드 갭 크기가 작은 반도성 물질막으로 이루어지는비휘발성 메모리 소자.
- 제 7 항에 있어서,상기 전하저장막은,반도성 물질막에 p형 불순물 또는 n형 불순물이 도핑된 전도성 물질막으로 이루어지는비휘발성 메모리 소자.
- 제 8 항에 있어서,상기 전하저장막의 도핑 농도는,1E18 내지 1E21atoms/cm3인비휘발성 메모리 소자.
- 제 1 항에 있어서,상기 전하저장막은,폴리실리콘막, 게르마늄막 또는 실리콘게르마늄막(SixGe1-x, 0<x<1)으로 이루어지는비휘발성 메모리 소자.
- 제 1 항에 있어서,상기 제1 전하트랩막 또는 상기 제2 전하트랩막은,실리콘 질화막, 알루미늄 산화막, 지르코늄 산화막, 하프늄산화막, 란탄산화막 및 니오븀산화막 중 하나 또는 이들의 조합으로 이루어지는비휘발성 메모리 소자.
- 제 1 항에 있어서,상기 제1 및 제2 전하트랩막이 실리콘 질화막으로 이루어지는 경우,실리콘에 대한 질소의 비율이 0.6 내지 1.45인비휘발성 메모리 소자.
- 제 1 항에 있어서,상기 전하포획막의 두께는50 내지 150Å인비휘발성 메모리 소자.
- 제 1 항에 있어서,상기 전하저장막의 두께는,10 내지 50Å인비휘발성 메모리 소자.
- 제 1 항에 있어서,상기 제1 전하트랩막 또는 상기 제2 전하트랩막의 두께는,10 내지 50Å인비휘발성 메모리 소자.
- 기판 상에 터널절연막을 형성하는 단계;상기 터널절연막 상에, 순차적으로 적층된 제1 전하트랩막, 전하저장막, 및 제2 전하트랩막을 포함하는 전하포획막을 형성하는 단계;상기 전하포획막 상에 전하차단막을 형성하는 단계; 및상기 전하차단막 상에 게이트 전극용 도전막을 형성하는 단계를 포함하는 비휘발성 메모리 소자 제조 방법.
- 삭제
- 삭제
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- 제 16 항에 있어서,상기 게이트 전극용 도전막 형성 단계 후에,상기 게이트 전극용 도전막, 전하차단막 및 전하포획막을 식각하여 게이트 패턴을 형성하는 단계; 및산화 공정을 통해, 상기 전하포획막의 측벽에 산화막을 형성하는 단계를 더 포함하는 비휘발성 메모리 소자 제조 방법.
- 제 16 항에 있어서,상기 전하저장막 형성 단계는,400 내지 800℃에서, SiH4 가스, SiCl2H2 가스 또는 Si3H8 가스를 이용한 CVD 방법에 의해 수행되는비휘발성 메모리 소자 제조 방법.
- 제 16 항에 있어서,상기 제1 전하트랩막 형성 단계 또는 상기 제2 전하트랩막 형성 단계는,400 내지 800℃에서, SiH4 가스 또는 SiCl2H2 가스 및 NH3 가스를 이용한 CVD 방법에 의해 수행되는비휘발성 메모리 소자 제조 방법.
- 제 16 항에 있어서,상기 전하저장막은,상기 제1 및 제2 전하트랩막보다 밴드 갭 크기가 작은 반도성 물질막으로 이루어지는비휘발성 메모리 소자 제조 방법.
- 제 23 항에 있어서,상기 전하저장막은,반도성 물질막에 p형 불순물 또는 n형 불순물이 도핑된 전도성 물질막으로 이루어지는비휘발성 메모리 소자 제조 방법.
- 제 24 항에 있어서,상기 전하저장막의 도핑 농도는,1E18 내지 1E21atoms/cm3인비휘발성 메모리 소자 제조 방법.
- 제 16 항에 있어서,상기 전하저장막은,폴리실리콘막, 게르마늄막 또는 실리콘게르마늄막(SixGe1-x, 0<x<1)으로 이루어지는비휘발성 메모리 소자 제조 방법.
- 제 16 항에 있어서,상기 제1 전하트랩막 또는 상기 제2 전하트랩막은,실리콘 질화막, 알루미늄 산화막, 지르코늄 산화막, 하프늄산화막, 란탄산화막 및 니오븀산화막 중 하나 또는 이들의 조합으로 이루어지는비휘발성 메모리 소자 제조 방법.
- 제 16 항에 있어서,상기 제1 및 제2 전하트랩막이 실리콘 질화막으로 이루어지는 경우,실리콘에 대한 질소의 비율이 0.6 내지 1.45인비휘발성 메모리 소자 제조 방법.
- 제 16 항에 있어서,상기 전하포획막의 두께는50 내지 150Å인비휘발성 메모리 소자 제조 방법.
- 제 16 항에 있어서,상기 전하저장막의 두께는,10 내지 50Å인비휘발성 메모리 소자 제조 방법.
- 제 16 항에 있어서,상기 제1 전하트랩막 또는 상기 제2 전하트랩막의 두께는,10 내지 50Å인비휘발성 메모리 소자 제조 방법.
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KR1020080134788A KR101060617B1 (ko) | 2008-12-26 | 2008-12-26 | 비휘발성 메모리 소자 및 그 제조 방법 |
US12/493,820 US8604537B2 (en) | 2008-12-26 | 2009-06-29 | Nonvolatile memory device and method of fabricating the same |
CN200910159486.2A CN101771053B (zh) | 2008-12-26 | 2009-07-14 | 非易失性存储器件及其制造方法 |
US14/075,901 US8816424B2 (en) | 2008-12-26 | 2013-11-08 | Nonvolatile memory device |
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KR101060617B1 true KR101060617B1 (ko) | 2011-08-31 |
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WO2016172636A1 (en) * | 2015-04-24 | 2016-10-27 | NEO Semiconductor, Inc. | Dual Function Hybrid Memory Cell |
US10068912B1 (en) | 2017-06-05 | 2018-09-04 | Cypress Semiconductor Corporation | Method of reducing charge loss in non-volatile memories |
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WO2002029902A1 (fr) * | 2000-10-03 | 2002-04-11 | Sony Corporation | Dispositif de stockage de semi-conducteur non volatil et son procede de production |
KR100843229B1 (ko) | 2007-01-11 | 2008-07-02 | 삼성전자주식회사 | 하이브리드 구조의 전하 트랩막을 포함하는 플래쉬 메모리소자 및 그 제조 방법 |
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KR100902313B1 (ko) * | 2007-09-27 | 2009-06-12 | 국민대학교산학협력단 | 다층의 전하저장층을 가지는 플로팅 게이트, 플로팅게이트의 제조방법, 이를 이용한 비휘발성 메모리 장치 및그 제조방법 |
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WO2002029902A1 (fr) * | 2000-10-03 | 2002-04-11 | Sony Corporation | Dispositif de stockage de semi-conducteur non volatil et son procede de production |
KR100843229B1 (ko) | 2007-01-11 | 2008-07-02 | 삼성전자주식회사 | 하이브리드 구조의 전하 트랩막을 포함하는 플래쉬 메모리소자 및 그 제조 방법 |
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US8604537B2 (en) | 2013-12-10 |
US20100163963A1 (en) | 2010-07-01 |
CN101771053B (zh) | 2013-01-30 |
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