JP7123585B2 - 半導体記憶装置 - Google Patents
半導体記憶装置 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 80
- 238000003860 storage Methods 0.000 title description 11
- 239000000758 substrate Substances 0.000 claims description 17
- 230000014759 maintenance of location Effects 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 22
- 238000004519 manufacturing process Methods 0.000 description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 229910052814 silicon oxide Inorganic materials 0.000 description 12
- 238000005229 chemical vapour deposition Methods 0.000 description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- 238000001039 wet etching Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten 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
- 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
- H01L29/7889—Vertical transistors, i.e. transistors having source and drain not in the same horizontal plane
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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
- H01L29/401—Multistep manufacturing processes
- H01L29/4011—Multistep manufacturing processes for data storage electrodes
- H01L29/40114—Multistep manufacturing processes for data storage electrodes the electrodes comprising a conductor-insulator-conductor-insulator-semiconductor structure
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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
- H01L29/7926—Vertical transistors, i.e. transistors having source and drain not in the same horizontal plane
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/10—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the top-view layout
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- H—ELECTRICITY
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- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/20—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels
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- H—ELECTRICITY
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- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/20—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels
- H10B41/23—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels
- H10B41/27—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
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- H—ELECTRICITY
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- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/30—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the memory core region
- H10B41/35—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the memory core region with a cell select transistor, e.g. NAND
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- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
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- H10B—ELECTRONIC MEMORY DEVICES
- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/20—EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels
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- H—ELECTRICITY
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- H10B—ELECTRONIC MEMORY DEVICES
- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/20—EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels
- H10B43/23—EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels
- H10B43/27—EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/30—EEPROM devices comprising charge-trapping gate insulators characterised by the memory core region
- H10B43/35—EEPROM devices comprising charge-trapping gate insulators characterised by the memory core region with cell select transistors, e.g. NAND
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- Condensed Matter Physics & Semiconductors (AREA)
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- Manufacturing & Machinery (AREA)
- Non-Volatile Memory (AREA)
- Semiconductor Memories (AREA)
Description
図1(a)および(b)は、第1実施形態に係る記憶装置1を示す模式図である。図1(a)は、図1(b)中に示すB-B線に沿った断面を示す模式図である。図1(b)は、図1(a)中に示すA-A線に沿った断面を示す平面図である。
図2(a)、2(b)、3(b)、4(a)、4(b)、5(b)、7(b)、8(a)および8(b)は、図1(a)中に示すA-A線に沿った断面に対応する断面を示す模式図である。図3(a)、5(a)、図6および図7(a)は、図1(b)中に示すB-B線に沿った断面に対応する断面を示す平面図である。
図9(a)および(b)は、第2実施形態に係る記憶装置2を示す模式図である。図9(a)は、図9(b)中に示すD-D線に沿った断面を示す模式図である。図9(b)は、図9(a)中に示すC-C線に沿った断面を示す模式図である。
図10(a)、図11および図12(a)は、図9(b)中に示すB-B線に沿った断面に該当する断面を示す模式図である。図10(b)および図12(b)は、図9(a)中に示すC-C線に沿った断面に該当する断面を示す模式図である。
Claims (7)
- 基板と、
前記基板の表面と平行な第1方向に延伸し、前記第1方向および、前記第1方向と交差し前記基板に対して垂直な第2方向に広がる第1面と、前記第1方向および前記第2方向に広がり、周縁が前記第1面に接続し、前記第1面に対して前記基板と平行で前記第1方向と交差する第3方向に離れるように設けられた第2面を有する第1電極と、
前記第1方向に延伸し、前記第1電極と前記第3方向に離間して設けられ、前記第1方向と前記第2方向に広がる第3面と、前記第2面と対向して前記第1方向および前記第2方向に広がり、周縁が前記第3面に接続し、前記第3面に対して前記第3方向に離れるように設けられる第4面を有する第2電極であって、前記第3方向において前記第2面と前記第4面の間隔は、これにそれぞれ接続する前記第1面と前記第3面の間隔より大きくなるように構成される前記第1電極及び前記第2電極と、
前記第2面と前記第4面の間に設けられ、前記第2方向に延伸する信号線と、
前記信号線と前記第2面との間に設けられ、前記第1方向における両端に設けられた第1部と、前記第1部の間に位置し、かつ、前記第1部に対して、前記第2面の方向に向かって、前記第3方向に離れた位置に設けられる第2部と、を有する第1電荷保持膜と、
前記信号線と前記第4面との間に設けられ、前記第1方向における両端に設けられた第3部と、前記第3部の間に位置し、かつ、前記第3部に対して、前記第4面の方向に向かって、前記第3方向に離れた位置に設けられる第4部と、を有する第2電荷保持膜と、
前記基板と前記信号線との間に設けられた配線層と、
を備える半導体記憶装置であって、
前記第1電荷保持膜及び前記第2電荷保持膜を通過する、前記基板の表面に平行な断面において、前記信号線の輪郭は、前記第2部に対向する第5部と、前記第4部に対向する第6部と、前記第5部の前記第1方向における一端と、前記第6部の前記第1方向における一端と曲率が不連続になるように接続し、前記第1方向を向かうように設けられる第7部と、前記第5部の前記第1方向における他端と、前記第6部の前記第1方向における他端と曲率が不連続になるように接続し、前記第7部と反対の前記第1方向を向かうように設けられる第8部とから形成され、
前記第5部および前記第6部は、それぞれ、前記第3方向における第1頂部を有し、
前記第7部および前記第8部は、それぞれ、前記第1方向における第2頂部を有し、
前記第1頂部および前記第2頂部は、それぞれ、曲率を有する滑らかな形状に設けられる半導体記憶装置。 - 前記第1頂部の曲率は、前記第2頂部の曲率よりも小さいことを特徴とする請求項1に記載の半導体記憶装置。
- 前記第5部の前記第1頂部から前記第6部の前記第1頂部に至る距離は、前記第7部の前記第2頂部から前記第8部の前記第2頂部に至る距離より小さいことを特徴とする請求項1に記載の半導体記憶装置。
- 前記断面において、前記第1部及び前記第2部、ならびに、前記第3部及び前記第4部は、それぞれ、曲率を有するように滑らかに形成される請求項1に記載の半導体記憶装置。
- 前記第7部及び前記第8部は、前記第3方向において前記第1部と前記第3部の間の位置に、かつ、前記第1方向において前記第1部と前記第3部と異なる位置に設けられている請求項1に記載の半導体記憶装置。
- 前記信号線の中心は、前記第3方向において前記第2部と前記第4部とを結び、かつ、前記第1方向において前記第7部と前記第8部を結ぶ位置を通過する請求項1に記載の半導体記憶装置。
- 前記断面における前記信号線の輪郭は、第1方向における両端を結ぶ長軸と、第3方向
における両端を結ぶ短軸とからなる楕円に対し、この楕円の内部に設けられ、前記第1方向における一端から離れるに従い、前記楕円との距離が大きくなる第1の輪郭部と、これに接続し、前記第3方向における一端に近づくに従い、前記楕円との距離が小さくなる第2の輪郭部とからなる請求項1に記載の半導体記憶装置。
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JP2018048447A JP7123585B2 (ja) | 2018-03-15 | 2018-03-15 | 半導体記憶装置 |
CN201810886808.2A CN110277406B (zh) | 2018-03-15 | 2018-08-06 | 半导体存储装置 |
TW107127262A TWI676239B (zh) | 2018-03-15 | 2018-08-06 | 半導體記憶裝置 |
US16/122,492 US10651186B2 (en) | 2018-03-15 | 2018-09-05 | Semiconductor memory device |
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EP3891805B1 (en) | 2019-04-30 | 2023-09-27 | Yangtze Memory Technologies Co., Ltd. | Methods for forming three-dimensional memory device having bent backside word lines |
JP2022520174A (ja) * | 2019-04-30 | 2022-03-29 | 長江存儲科技有限責任公司 | 屈曲裏側ワード線を有する3次元メモリデバイス |
JP2021145014A (ja) * | 2020-03-11 | 2021-09-24 | キオクシア株式会社 | 半導体記憶装置 |
JP2022036723A (ja) * | 2020-08-24 | 2022-03-08 | キオクシア株式会社 | 半導体記憶装置 |
JP2022148213A (ja) | 2021-03-24 | 2022-10-06 | キオクシア株式会社 | 半導体記憶装置 |
JP2023041280A (ja) | 2021-09-13 | 2023-03-24 | キオクシア株式会社 | 記憶装置 |
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JP2015228484A (ja) | 2014-05-21 | 2015-12-17 | マクロニクス インターナショナル カンパニー リミテッド | 3d独立二重ゲートフラッシュメモリ |
US20170263615A1 (en) | 2016-03-09 | 2017-09-14 | Kabushiki Kaisha Toshiba | Semiconductor memory device |
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US9397110B2 (en) * | 2014-05-21 | 2016-07-19 | Macronix International Co., Ltd. | 3D independent double gate flash memory |
KR101940374B1 (ko) * | 2016-05-19 | 2019-04-11 | 연세대학교 산학협력단 | 3 차원 비휘발성 메모리 소자 및 이의 제조 방법 |
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JP2015228484A (ja) | 2014-05-21 | 2015-12-17 | マクロニクス インターナショナル カンパニー リミテッド | 3d独立二重ゲートフラッシュメモリ |
US20170263615A1 (en) | 2016-03-09 | 2017-09-14 | Kabushiki Kaisha Toshiba | Semiconductor memory device |
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US20190287983A1 (en) | 2019-09-19 |
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CN110277406A (zh) | 2019-09-24 |
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