KR100855991B1 - 비휘발성 메모리 소자 및 그 제조 방법 - Google Patents
비휘발성 메모리 소자 및 그 제조 방법 Download PDFInfo
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- KR100855991B1 KR100855991B1 KR1020070030048A KR20070030048A KR100855991B1 KR 100855991 B1 KR100855991 B1 KR 100855991B1 KR 1020070030048 A KR1020070030048 A KR 1020070030048A KR 20070030048 A KR20070030048 A KR 20070030048A KR 100855991 B1 KR100855991 B1 KR 100855991B1
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- Prior art keywords
- semiconductor pillar
- layer
- doped layer
- memory device
- nonvolatile memory
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000004065 semiconductor Substances 0.000 claims abstract description 123
- 238000003860 storage Methods 0.000 claims abstract description 37
- 239000000758 substrate Substances 0.000 claims abstract description 37
- 230000005641 tunneling Effects 0.000 claims description 17
- 230000000903 blocking effect Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 238000002955 isolation Methods 0.000 claims description 9
- 238000000151 deposition Methods 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 239000002070 nanowire Substances 0.000 claims description 7
- 230000008021 deposition Effects 0.000 claims description 6
- 238000005530 etching Methods 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 239000002019 doping agent Substances 0.000 claims 1
- 230000010354 integration Effects 0.000 abstract description 10
- 239000000463 material Substances 0.000 description 24
- 150000004767 nitrides Chemical class 0.000 description 7
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- 239000002184 metal Substances 0.000 description 5
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- 239000002159 nanocrystal Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 229910021332 silicide Inorganic materials 0.000 description 2
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
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- 229910052732 germanium Inorganic materials 0.000 description 1
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- 239000002784 hot electron Substances 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
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- 238000000038 ultrahigh vacuum chemical vapour deposition Methods 0.000 description 1
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Abstract
Description
Claims (25)
- 기판 상의, 제 1 도전형을 갖는 제 1 도핑층;상기 제 1 도핑층으로부터 상기 기판 위로 상향 신장되고, 상기 제 1 도전형의 반대인 제 2 도전형을 갖는 반도체 기둥;상기 반도체 기둥의 측벽을 한바퀴 둘러싸는 제어 게이트 전극;상기 반도체 기둥 및 상기 제어 게이트 전극 사이에 개재된 전하 저장층; 및상기 반도체 기둥과 전기적으로 연결되도록 상기 반도체 기둥 상에 배치되고, 상기 제 1 도전형을 갖는 제 2 도핑층을 포함하는 것을 특징으로 하는 비휘발성 메모리 소자.
- 제 1 항에 있어서, 상기 제 1 도핑층은 상기 반도체 기둥의 바닥면의 중심부를 덮는 것을 특징으로 하는 비휘발성 메모리 소자.
- 제 1 항에 있어서, 상기 제 1 도핑층은 상기 반도체 기둥의 바닥면을 둘러싸는 것을 특징으로 하는 비휘발성 메모리 소자.
- 제 1 항에 있어서, 상기 제 1 도핑층의 측벽을 둘러싸도록 상기 기판 상에 형성된 소자분리막을 더 포함하는 것을 특징으로 하는 비휘발성 메모리 소자.
- 제 1 항에 있어서, 상기 제 1 도핑층은 상기 기판의 일부분에 상기 제 1 도전형을 갖는 불순물이 도핑되어 한정된 것을 특징으로 하는 비휘발성 메모리 소자.
- 제 1 항에 있어서, 상기 제 1 도핑층은 상기 기판 상의 에피택셜층으로 제공된 것을 특징으로 하는 비휘발성 메모리 소자.
- 제 1 항에 있어서, 상기 제 2 도핑층의 폭은 상기 제 1 도핑층의 폭보다 큰 것을 특징으로 하는 비휘발성 메모리 소자.
- 제 7 항에 있어서, 상기 전하 저장층은 상기 반도체 기둥을 둘러싸고 상기 제어 게이트 전극의 상면 및 바닥면을 덮도록 신장된 것을 특징으로 하는 비휘발성 메모리 소자.
- 제 1 항에 있어서, 상기 전하 저장층 및 상기 반도체 기둥 사이의 터널링 절연층 및 상기 전하 저장층 및 상기 제어 게이트 전극 사이의 블로킹 절연층을 더 포함하는 것을 특징으로 하는 비휘발성 메모리 소자.
- 제 9 항에 있어서, 상기 터널링 절연층 및 상기 블로킹 절연층은 상기 반도체 기둥을 둘러싸고 상기 제어 게이트 전극의 상면 및 바닥면을 덮도록 신장된 것을 특징으로 하는 비휘발성 메모리 소자.
- 제 1 항에 있어서, 상기 반도체 기둥은 나노와이어 구조를 갖는 것을 특징으로 하는 비휘발성 메모리 소자.
- 제 1 항에 있어서, 상기 제 2 도핑층과 전기적으로 연결된 비트 라인 전극을 더 포함하는 것을 특징으로 하는 비휘발성 메모리 소자.
- 기판 상의, 제 1 도전형을 갖는 제 1 도핑층;상기 제 1 도핑층으로부터 상기 기판 위로 상향 신장되고, 상기 제 1 도전형의 반대인 제 2 도전형을 갖는 반도체 기둥;상기 반도체 기둥의 측벽을 한바퀴 둘러싸는 제어 게이트 전극;상기 반도체 기둥 및 상기 제어 게이트 전극 사이에 개재되고, 상기 제어 게이트 전극의 상면 및 바닥면을 덮는 전하 저장층; 및상기 반도체 기둥과 전기적으로 연결되도록 상기 반도체 기둥 상에 배치되고, 상기 제 1 도전형을 갖는 제 2 도핑층을 포함하는 것을 특징으로 하는 비휘발성 메모리 소자.
- 제 13 항에 있어서, 상기 제 1 도핑층은 상기 반도체 기둥의 바닥면을 덮는 것을 특징으로 하는 비휘발성 메모리 소자.
- 기판 상에 제 1 도전형을 갖는 제 1 도핑층을 형성하는 단계;상기 제 1 도핑층으로부터 상기 기판 위로 상향 신장되도록, 상기 제 1 도전형의 반대인 제 2 도전형을 갖는 반도체 기둥을 형성하는 단계;상기 반도체 기둥과 전기적으로 연결되도록 상기 반도체 기둥 상에, 상기 제 1 도전형을 갖는 제 2 도핑층을 형성하는 단계;상기 반도체 기둥의 측벽을 한바퀴 둘러싸는 전하 저장층을 형성하는 단계; 및상기 반도체 기둥 반대편의 상기 전하 저장층 상에 제어 게이트 전극을 형성하는 단계를 포함하는 것을 특징으로 하는 비휘발성 메모리 소자의 제조 방법.
- 제 15 항에 있어서, 상기 제 1 도핑층은 상기 기판의 일부분에 상기 제 1 도전형의 불순물을 도핑하여 형성하는 것을 특징으로 하는 비휘발성 메모리 소자의 제조 방법.
- 제 15 항에 있어서, 상기 제 1 도핑층은 상기 기판 상에 에피택셜 증착법을 이용하여 형성하는 것을 특징으로 하는 비휘발성 메모리 소자의 제조 방법.
- 제 15 항에 있어서, 상기 제 1 도핑층은 상기 기판 상의 소자분리막 사이에 한정하는 것을 특징으로 하는 비휘발성 메모리 소자의 제조 방법.
- 제 15 항에 있어서, 상기 반도체 기둥은 나노와이어 구조로 형성하는 것을 특징으로 하는 비휘발성 메모리 소자의 제조 방법.
- 제 19 항에 있어서, 상기 반도체 기둥은 상기 제 1 도핑층 상에 에피택셜 증착법을 이용하여 형성하는 것을 특징으로 하는 비휘발성 메모리 소자의 제조 방법.
- 제 15 항에 있어서, 상기 제 2 도핑층을 형성하기 전에 상기 반도체 기둥의 측벽을 둘러싸는 스페이서 절연막을 형성하는 단계; 및 상기 제 2 도핑층을 형성하는 단계 후 상기 스페이서 절연막을 제거하는 단계를 더 포함하는 것을 특징으로 하는 비휘발성 메모리 소자의 제조 방법.
- 제 21 항에 있어서, 상기 스페이서 절연막은 상기 반도체 기둥의 측벽을 열산화시켜 형성하는 것을 특징으로 하는 비휘발성 메모리 소자의 제조 방법.
- 제 15 항에 있어서, 상기 전하 저장층은 상기 제 2 도핑층 및 상기 반도체 기둥을 덮도록 형성한 후, 평탄화 및 이방성 식각을 이용하여 상기 반도체 기둥을 둘러싸고 상기 제어 게이트 전극의 상면 및 바닥면을 덮도록 한정하는 것을 특징으로 하는 비휘발성 메모리 소자의 제조 방법.
- 제 15 항에 있어서, 상기 제 2 도핑층을 형성하는 단계 후,상기 반도체 기둥 및 상기 전하 저장층 사이에 개재된 터널링 절연층을 형성하는 단계; 및상기 전하 저장층 및 상기 제어 게이트 전극 사이에 개재된 블로킹 절연층을 형성하는 단계를 더 포함하는 것을 특징으로 하는 비휘발성 메모리 소자의 제조 방법.
- 제 24 항에 있어서, 상기 터널링 절연층 및 상기 블로킹 절연층은 상기 제 2 도핑층 및 상기 반도체 기둥을 덮도록 각각 형성한 후, 평탄화 및 이방성 식각을 이용하여 상기 반도체 기둥을 둘러싸고 상기 제어 게이트 전극의 상면 및 바닥면을 덮도록 한정하는 것을 특징으로 하는 비휘발성 메모리 소자의 제조 방법.
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JP2008084147A JP2008244486A (ja) | 2007-03-27 | 2008-03-27 | 不揮発性メモリ素子、その製造方法及び半導体チップ |
US12/056,374 US20090001352A1 (en) | 2007-03-27 | 2008-03-27 | Non-Volatile Memory Device, Method of Manufacturing the Same, and Semiconductor Package |
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KR101140010B1 (ko) | 2011-02-28 | 2012-06-14 | 에스케이하이닉스 주식회사 | 반도체 소자 및 그 형성방법 |
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US9299568B2 (en) | 2007-05-25 | 2016-03-29 | Cypress Semiconductor Corporation | SONOS ONO stack scaling |
US9431549B2 (en) * | 2007-12-12 | 2016-08-30 | Cypress Semiconductor Corporation | Nonvolatile charge trap memory device having a high dielectric constant blocking region |
US8232544B2 (en) * | 2008-04-04 | 2012-07-31 | Nokia Corporation | Nanowire |
KR20100001747A (ko) * | 2008-06-27 | 2010-01-06 | 삼성전자주식회사 | 도전 구조물, 이의 형성 방법, 수직 필러 트랜지스터 및이의 제조 방법. |
JP2010050127A (ja) * | 2008-08-19 | 2010-03-04 | Toshiba Corp | 不揮発性半導体記憶装置及びその製造方法 |
JP2010123600A (ja) * | 2008-11-17 | 2010-06-03 | Toshiba Corp | 不揮発性半導体記憶装置 |
JP5421632B2 (ja) * | 2009-03-27 | 2014-02-19 | 伊藤忠商事株式会社 | 電池パック |
TWI549227B (zh) * | 2015-05-20 | 2016-09-11 | 旺宏電子股份有限公司 | 記憶元件及其製造方法 |
CN112151595B (zh) * | 2019-06-28 | 2024-01-26 | 中芯国际集成电路制造(上海)有限公司 | 半导体结构及其形成方法 |
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KR20060043688A (ko) * | 2004-03-17 | 2006-05-15 | 후지오 마수오카 | 반도체 메모리 장치 및 그 제조 방법 |
KR20060053221A (ko) * | 2004-10-12 | 2006-05-19 | 실리콘 스토리지 테크놀로지 인크 | 제 2 부분보다 더 깊은 제 1 부분을 가진 트렌치 내비휘발성 메모리 셀, 이 메모리 셀들의 어레이, 및 제조방법 |
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