KR100924983B1 - 적층된 비휘발성 메모리 소자 및 그것을 제조하기 위한방법 - Google Patents
적층된 비휘발성 메모리 소자 및 그것을 제조하기 위한방법 Download PDFInfo
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- KR100924983B1 KR100924983B1 KR1020070058912A KR20070058912A KR100924983B1 KR 100924983 B1 KR100924983 B1 KR 100924983B1 KR 1020070058912 A KR1020070058912 A KR 1020070058912A KR 20070058912 A KR20070058912 A KR 20070058912A KR 100924983 B1 KR100924983 B1 KR 100924983B1
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- 238000000034 method Methods 0.000 title claims abstract description 95
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 150000004767 nitrides Chemical class 0.000 claims description 61
- 239000000463 material Substances 0.000 claims description 38
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 35
- 229920005591 polysilicon Polymers 0.000 claims description 35
- 239000004065 semiconductor Substances 0.000 claims description 31
- 229910052710 silicon Inorganic materials 0.000 claims description 23
- 239000010703 silicon Substances 0.000 claims description 23
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 18
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 18
- 238000005530 etching Methods 0.000 claims description 13
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910021332 silicide Inorganic materials 0.000 claims description 5
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000012212 insulator Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052785 arsenic Inorganic materials 0.000 claims description 3
- 238000005229 chemical vapour deposition Methods 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052732 germanium Inorganic materials 0.000 claims description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 2
- 238000000059 patterning Methods 0.000 claims 4
- 238000000151 deposition Methods 0.000 claims 2
- 238000012545 processing Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 29
- 230000015654 memory Effects 0.000 description 26
- 239000000758 substrate Substances 0.000 description 10
- 239000004020 conductor Substances 0.000 description 9
- 230000005641 tunneling Effects 0.000 description 7
- 230000010354 integration Effects 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
- 238000000206 photolithography Methods 0.000 description 5
- 239000003989 dielectric material Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000003491 array Methods 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 230000005689 Fowler Nordheim tunneling Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005036 potential barrier Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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Abstract
Description
Claims (62)
- 서로의 상부에 순서대로 형성된 복수개의 비트라인 층들 및 복수개의 워드라인 층들을 포함하는 비휘발성 메모리 소자를 제조하기 위한 방법으로,제1 비트라인 층을 형성하되, 상기 제1 비트라인 층을 형성하는 것은절연체 상에 반도체층을 형성하고,상기 반도체층을 패터닝 및 식각하여 복수개의 비트라인들을 형성하는 것을 포함하고,상기 제1 비트라인 층 상부에 제1 워드라인 층을 형성하되, 상기 제1 워드라인 층을 형성하는 것은,제1 트래핑 구조, 도전층 및 제2 트래핑 구조를 차례로 형성하고,상기 제1 및 제2 트래핑 구조들과 상기 도전층을 패터닝 및 식각하여 복수개의 워드라인들을 형성하는 것을 포함하고,상기 복수개의 워드라인들에 의해 덮이지 않은 상기 복수개의 비트라인들의 영역들에 소스/드레인 영역들을 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 반도체층을 패터닝 및 식각하는 것은상기 반도체층 상부에 캡층을 형성하고,상기 캡층 및 상기 반도체층을 식각하여 상기 캡층 및 상기 반도체층의 잔류부분들을 포함하는 비트라인 영역들을 형성하고,상기 식각된 캡 및 반도체 층들 상부에 유전층을 형성하고,상기 유전층의 일부를 식각하여 상기 비트라인 영역들 사이 및 상기 캡층의 잔류부분들 상부에 유전 영역들을 형성하고,상기 캡층의 잔류부분들을 제거하여 상기 캡층 상부의 상기 유전층 부분들을 제거하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 2에 있어서, 상기 캡층은 질화물층을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 2에 있어서, 상기 유전층은 실리콘 산화물(SiO2)을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 4에 있어서, 상기 실리콘 산화물은 고밀도 플라즈마 화학기상증착법을 사용하여 증착되는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 제1 및 제2 트래핑 구조들 각각을 형성하는 것은 실리콘-산화물-질화물-산화물-실리콘(SONOS) 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 제1 및 제2 트래핑 구조들 각각을 형성하는 것은 산화물-질화물-산화물(ONO) 질화물 롬 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 제1 및 제2 트래핑 구조들 각각을 형성하는 것은 밴드갭 공학기술로 제조된(Band-gap Engineered; BE) SONOS 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 제1 및 제2 트래핑 구조들 각각을 형성하는 것은 실리콘-산화물-질화물-실리콘(SONS) 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 제1 및 제2 트래핑 구조들 각각을 형성하는 것은 상부 BE-SONOS 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 제1 및 제2 트래핑 구조들 각각을 형성하는 것은 상부 실리콘-산화물-질화물-산화물-실리콘-산화물-실리콘(SONOSOS) 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 제1 및 제2 트래핑 구조들 각각을 형성하는 것은 하부 SOSONOS 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 제1 및 제2 트래핑 구조들 각각을 형성하는 것은 실리콘-산화물-질화물-산화물-질화물-실리콘(SONONS) 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 제1 및 제2 트래핑 구조들 각각을 형성하는 것은 실리콘 질화물(SiN)층을 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 제1 및 제2 트래핑 구조들 각각을 형성하는 것은 SiON층을 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 제1 및 제2 트래핑 구조들 각각을 형성하는 것은 고유전율(Hi-K) 재료를 증착하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 16에 있어서, 상기 Hi-K 재료는 HfO2, AlN 또는 Al2O3인 비휘발성 메모리 소자 제조방법.
- 삭제
- 청구항 1에 있어서, 상기 반도체층은 P형 반도체 재료를 포함하고,상기 소스 드레인 영역들을 형성하는 것은 상기 P형 반도체 재료에 N+ 영역들을 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 19에 있어서, 상기 N+ 영역들은 As 또는 P를 사용하여 형성되는 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 도전층은 폴리실리콘 재료를 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 21에 있어서, 상기 도전층은 폴리실리콘/실리사이드/폴리실리콘 재료를 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 21에 있어서, 상기 도전층은 금속을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 23에 있어서, 상기 금속은 알루미늄, 구리 또는 텅스텐인 비휘발성 메모리 소자 제조방법.
- 청구항 1에 있어서, 상기 제1 워드라인 층 상부에 제2 비트라인 층을 형성하는 것을 더 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 25에 있어서, 상기 제2 비트라인 층 상부에 제2 워드라인 층을 형성하는 것을 더 포함하는 비휘발성 메모리 소자 제조방법.
- 서로의 상부에 순서대로 형성된 복수개의 비트라인 층들 및 복수개의 워드라인 층들을 포함하는 비휘발성 메모리 소자를 제조하기 위한 방법으로,제1 비트라인 층을 형성하고,상기 제1 비트라인 층 상부에 제1 워드라인 층을 형성하되, 상기 제1 워드라인 층을 형성하는 것은트래핑 구조 및 도전층을 차례로 형성하고,상기 트래핑 구조 및 상기 도전층을 패터닝 및 식각하여 복수개의 워드라인들을 형성하는 것을 포함하고,상기 복수개의 워드라인들에 의해 덮이지 않은 상기 복수개의 비트라인들의 영역들에 소스/드레인 영역들을 형성하고,상기 제1 워드라인 층 상부에 유전층을 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 27에 있어서, 상기 유전층 상부에 제2 비트라인 층을 형성하는 것을 더 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 28에 있어서, 상기 제2 비트라인 층 상부에 제2 워드라인 층을 형성하는 것을 더 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 27에 있어서, 상기 트래핑 구조를 형성하는 것은 실리콘-산화물-질화물-산화물-실리콘(SONOS) 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 27에 있어서, 상기 트래핑 구조를 형성하는 것은 산화물-질화물-산화물(ONO) 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 27에 있어서, 상기 트래핑 구조를 형성하는 것은 밴드갭 공학기술로 제조된(Band-gap Engineered; BE) SONOS 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 27에 있어서, 상기 트래핑 구조를 형성하는 것은 실리콘-산화물-질화물-실리콘(SONS) 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 27에 있어서, 상기 트래핑 구조를 형성하는 것은 상부 BE-SONOS 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 27에 있어서, 상기 트래핑 구조를 형성하는 것은 상부 실리콘-산화물-질화물-산화물-실리콘-산화물-실리콘(SONOSOS) 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 27에 있어서, 상기 트래핑 구조를 형성하는 것은 하부 SOSONOS 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 27에 있어서, 상기 트래핑 구조를 형성하는 것은 실리콘-산화물-질화물-산화물-질화물-실리콘(SONONS) 구조를 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 27에 있어서, 상기 트래핑 구조를 형성하는 것은 실리콘 질화물(SiN)층을 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 27에 있어서, 상기 트래핑 구조를 형성하는 것은 SiON층을 형성하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 27에 있어서, 상기 트래핑 구조를 형성하는 것은 Hi-K 재료를 증착하는 것을 포함하는 비휘발성 메모리 소자 제조방법.
- 청구항 40에 있어서, 상기 Hi-K 재료는 HfO2, AlN 또는 Al2O3인 비휘발성 메모리 소자 제조방법.
- 삭제
- 청구항 27에 있어서, 상기 도전층은 폴리실리콘 재료를 포함하는 비휘발성 메모리 소자 제조방법.
- 각층이 반도체 재료로 형성되고 유전 영역들에 의해 분리된 복수개의 비트라인들을 포함하는 복수개의 비트라인 층들;각층이 복수개의 워드라인들을 포함하는 복수개의 워드라인 층들; 및상기 복수개의 워드라인들에 의해 덮이지 않은 상기 복수개의 비트라인들의 영역들에 형성된 소스/드레인 영역들을 포함하고,각 워드라인은제1 트래핑 구조,도전층 및제2 트래핑 구조를 포함하는 적층된 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 반도체 재료는 실리콘, 게르마늄 또는 실리콘-게르마늄을 포함하는 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 제1 트래핑 구조는 산화물-질화물-산화물(ONO) 구조를 포함하는 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 제1 트래핑 구조는 실리콘-산화물-질화물-산화물-실리콘(SONOS) 구조를 포함하는 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 제1 트래핑 구조는 밴드갭 공학기술로 제조된(Band-gap Engineered; BE) SONOS 구조를 포함하는 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 제1 트래핑 구조는 실리콘-산화물-질화물-실리콘(SONS) 구조를 포함하는 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 제1 트래핑 구조는 상부 BE-SONOS 구조를 포함하는 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 제1 트래핑 구조는 상부 실리콘-산화물-질화물-산 화물-실리콘-산화물-실리콘(SONOSOS) 구조를 포함하는 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 제1 트래핑 구조는 하부 SOSONOS 구조를 포함하는 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 제1 트래핑 구조는 실리콘-산화물-질화물-산화물-질화물-실리콘(SONONS) 구조를 포함하는 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 제1 트래핑 구조는 질화물층을 포함하는 비휘발성 메모리 소자.
- 청구항 54에 있어서, 상기 질화물층은 실리콘 질화물(SiN)인 비휘발성 메모리 소자.
- 청구항 54에 있어서, 상기 질화물층은 SiON층인 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 제1 트래핑 구조는 Hi-K 재료를 포함하는 비휘발성 메모리 소자.
- 청구항 57에 있어서, 상기 Hi-K 재료는 HfO2, AlN 또는 Al2O3인 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 도전층은 폴리실리콘을 포함하는 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 도전층은 폴리실리콘/실리사이드/폴리실리콘을 포함하는 비휘발성 메모리 소자.
- 청구항 44에 있어서, 상기 도전층은 금속을 포함하는 비휘발성 메모리 소자.
- 청구항 61에 있어서, 상기 금속은 Al, Cu 또는 W인 비휘발성 메모리 소자.
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US7977735B2 (en) | 2011-07-12 |
US8324681B2 (en) | 2012-12-04 |
JP5154841B2 (ja) | 2013-02-27 |
KR20070121526A (ko) | 2007-12-27 |
EP1870935A3 (en) | 2010-08-11 |
EP3116024B1 (en) | 2020-06-24 |
EP1870935A2 (en) | 2007-12-26 |
EP3116024A1 (en) | 2017-01-11 |
US20110241100A1 (en) | 2011-10-06 |
US20100155821A1 (en) | 2010-06-24 |
US7709334B2 (en) | 2010-05-04 |
US20070134855A1 (en) | 2007-06-14 |
EP1870935B1 (en) | 2017-04-19 |
JP2008004934A (ja) | 2008-01-10 |
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