KR101056543B1 - 공진 터널 장벽을 갖는 개선된 멀티-비트 비휘발성 메모리장치 - Google Patents
공진 터널 장벽을 갖는 개선된 멀티-비트 비휘발성 메모리장치 Download PDFInfo
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- 230000004888 barrier function Effects 0.000 title claims abstract description 69
- 230000000903 blocking effect Effects 0.000 claims abstract description 50
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 15
- 239000010703 silicon Substances 0.000 claims abstract description 15
- 229910052732 germanium Inorganic materials 0.000 claims abstract description 13
- 229910021417 amorphous silicon Inorganic materials 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 47
- 239000000758 substrate Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 18
- 238000002161 passivation Methods 0.000 claims description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 13
- 150000004767 nitrides Chemical class 0.000 claims description 13
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 7
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 1
- 238000007667 floating Methods 0.000 abstract description 30
- 229910002244 LaAlO3 Inorganic materials 0.000 abstract 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 238000009826 distribution Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 239000002019 doping agent Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 4
- 230000005641 tunneling Effects 0.000 description 4
- 229910017817 a-Ge Inorganic materials 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 108091006149 Electron carriers Proteins 0.000 description 1
- 230000005689 Fowler Nordheim tunneling Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- 229920001690 polydopamine Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 239000010409 thin film Substances 0.000 description 1
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- 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
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- H01L29/772—Field effect transistors
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- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/04—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
- G11C16/0466—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS comprising cells with charge storage in an insulating layer, e.g. metal-nitride-oxide-silicon [MNOS], silicon-oxide-nitride-oxide-silicon [SONOS]
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Abstract
Description
Claims (32)
- 비휘발성 메모리 셀로서,소스/드레인 영역쌍을 갖는 기판;상기 기판 위에 그리고 상기 소스/드레인 영역쌍 사이에 형성된 게이트 절연체 스택 - 상기 절연체 스택은,상기 기판 위에 형성된 LaAlO3의 제1 층,상기 LaAlO3의 제1 층 위에 상기 LaAlO3의 제1 층과 접촉하는 실리콘 또는 게르마늄 중 어느 하나의 제1 비정질(amorphous) 층,상기 제1 비정질 층 위에 상기 제1 비정질 층과 접촉하여 형성된 게르마늄 또는 실리콘 중 어느 하나의 제2 비정질 층으로서, 상기 제1 비정질 층과는 상이한 제2 비정질 층, 및상기 제2 비정질 층 위에 상기 제2 비정질 층과 접촉하여 형성된 LaAlO3의 제2 층을 포함함 -;상기 게이트 절연체 스택 위에 형성된 전하 트래핑(trapping) 층;상기 전하 트래핑 층 위에 형성된 전하 차단층; 및상기 전하 차단층 위에 형성된 게이트를 포함하는 비휘발성 메모리 셀.
- 제1항에 있어서,상기 전하 차단층과 상기 게이트 사이에 형성된 패시베이션(passivation) 층을 더 포함하는 비휘발성 메모리 셀.
- 제1항에 있어서,상기 전하 트래핑 층은 질화물로 이루어지는 비휘발성 메모리 셀.
- 제1항에 있어서,상기 전하 차단층은 HfSiON 또는 LaAlO3 중 어느 하나로 이루어지는 비휘발성 메모리 셀.
- 제2항에 있어서,상기 패시베이션 층은 TaN으로 이루어지는 비휘발성 메모리 셀.
- 제1항에 있어서,상기 전하 차단층과 상기 전하 트래핑 층은 고유전율(high-k) 재료로 이루어지는 비휘발성 메모리 셀.
- 메모리 시스템으로서,제어 신호들을 생성하는 프로세서; 및상기 프로세서에 연결되고 상기 제어 신호들에 응답하여 동작하는 비휘발성 메모리 장치를 포함하고,상기 메모리 장치는,기판에 형성된 복수의 비휘발성 메모리 셀을 갖고, 행 및 열 구조(architecture)로 배열되는 메모리 어레이를 포함하며,각각의 메모리 셀은,상기 기판 내에 도핑된 소스/드레인 영역쌍;상기 기판 위에 그리고 상기 소스/드레인 영역쌍 사이에 형성된 공진 터널 장벽 - 상기 공진 터널 장벽은,상기 기판 위에 형성된 LaAlO3의 제1 층,상기 LaAlO3의 제1 층 위에 형성된 실리콘 또는 게르마늄 중 어느 하나의 제1 비정질 층,상기 제1 비정질 층 위에 상기 제1 비정질 층과 접촉하여 형성된 게르마늄 또는 실리콘 중 어느 하나의 제2 비정질 층으로서, 상기 제1 비정질 층과 상이한 제2 비정질 층, 및상기 제2 비정질 층 위에 상기 제2 비정질 층과 접촉하여 형성된 LaAlO3의 제2 층을 포함함 -;상기 공진 터널 장벽 위에 형성된 고유전율 전하 트래핑 층;상기 전하 트래핑 층 위에 형성된 고유전율 유전체의 전하 차단층;상기 전하 차단층 위에 형성된 패시베이션 층; 및상기 패시베이션 층 위에 형성된 게이트를 포함하는 메모리 시스템.
- 제7항에 있어서,상기 메모리 장치는 상기 프로세서 제어 신호들에 응답하여 메모리 동작들을 수행하기 위한 제어 회로를 더 포함하는 메모리 시스템.
- 제7항에 있어서,상기 어레이의 상기 복수의 비휘발성 메모리 셀은 NAND 구조 또는 NOR 구조 중의 하나에 연결되어 있는 메모리 시스템.
- 기판에 비휘발성 메모리 셀을 제조하는 방법으로서,상기 기판에 소스/드레인 영역쌍을 도핑하는 단계;상기 기판 위에, 산화물을 포함하는, 공진 터널 장벽의 제1 층을 형성하는 단계;상기 제1 층 위에 비정질 실리콘 또는 비정질 게르마늄 중 하나의 제2 층을 형성하는 단계;상기 비정질 층 위에, LaAlO3를 포함하는, 공진 터널 장벽의 제3 층을 형성하는 단계;상기 공진 터널 장벽의 제3 층 위에 전하 트래핑 층을 형성하는 단계;상기 전하 트래핑 층 위에 고유전율 전하 차단층을 형성하는 단계; 및상기 전하 차단층 위에 제어 게이트를 형성하는 단계를 포함하는 비휘발성 메모리 셀 제조 방법.
- 제10항에 있어서,상기 전하 트래핑 층을 형성하는 단계는 SiN 또는 AlN 중의 어느 하나의 층을 형성하는 단계를 포함하는 비휘발성 메모리 셀 제조 방법.
- 제10항에 있어서,상기 전하 차단층과 상기 게이트 사이에 패시베이션 층을 형성하는 단계를 더 포함하는 비휘발성 메모리 셀 제조 방법.
- 제12항에 있어서,상기 패시베이션 층은 TaN 또는 TiN 중의 어느 하나로 이루어지는 비휘발성 메모리 셀 제조 방법.
- 제10항에 있어서,상기 게이트는 폴리실리콘으로 이루어지는 비휘발성 메모리 셀 제조 방법.
- 제10항에 있어서,산화물을 포함하는 상기 제1 층은 LaAlO3의 층인 비휘발성 메모리 셀 제조 방법.
- 제10항에 있어서,상기 전하 트래핑 층은 질화물 재료로 이루어지고, 상기 고유전율 전하 차단층은 HfSiON 또는 LaAlO3 중의 하나로 이루어지는 비휘발성 메모리 셀 제조 방법.
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PCT/US2006/047031 WO2007070424A1 (en) | 2005-12-09 | 2006-12-08 | Enhanced multi-bit non-volatile memory device with resonant tunnel barrier |
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EP1818989A3 (en) * | 2006-02-10 | 2010-12-01 | Semiconductor Energy Laboratory Co., Ltd. | Nonvolatile semiconductor storage device and manufacturing method thereof |
EP1837917A1 (en) * | 2006-03-21 | 2007-09-26 | Semiconductor Energy Laboratory Co., Ltd. | Nonvolatile semiconductor memory device |
TWI416738B (zh) * | 2006-03-21 | 2013-11-21 | Semiconductor Energy Lab | 非揮發性半導體記憶體裝置 |
EP1837900A3 (en) * | 2006-03-21 | 2008-10-15 | Semiconductor Energy Laboratory Co., Ltd. | Nonvolatile semiconductor memory device |
KR101488516B1 (ko) * | 2006-03-21 | 2015-02-02 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 불휘발성 반도체 기억장치 |
US7786526B2 (en) * | 2006-03-31 | 2010-08-31 | Semiconductor Energy Laboratory Co., Ltd. | Nonvolatile semiconductor memory device |
EP1840947A3 (en) * | 2006-03-31 | 2008-08-13 | Semiconductor Energy Laboratory Co., Ltd. | Nonvolatile semiconductor memory device |
US7554854B2 (en) * | 2006-03-31 | 2009-06-30 | Semiconductor Energy Laboratory Co., Ltd. | Method for deleting data from NAND type nonvolatile memory |
US8022460B2 (en) * | 2006-03-31 | 2011-09-20 | Semiconductor Energy Laboratory Co., Ltd. | Nonvolatile semiconductor memory device |
US7579646B2 (en) * | 2006-05-25 | 2009-08-25 | Taiwan Semiconductor Manufacturing Company, Ltd. | Flash memory with deep quantum well and high-K dielectric |
US8816422B2 (en) * | 2006-09-15 | 2014-08-26 | Taiwan Semiconductor Manufacturing Company, Ltd. | Multi-trapping layer flash memory cell |
US8294197B2 (en) * | 2006-09-22 | 2012-10-23 | Taiwan Semiconductor Manufacturing Company, Ltd. | Program/erase schemes for floating gate memory cells |
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