JP7234369B2 - 三次元メモリ装置およびその製造方法 - Google Patents
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 6
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- 229910052732 germanium Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
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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
- H10B43/20—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
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/02227—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process
- H01L21/0223—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate
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- 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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- 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
- H01L29/40117—Multistep manufacturing processes for data storage electrodes the electrodes comprising a charge-trapping insulator
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- 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
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- 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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Description
12 第1のドープ領域
14 保護層
16 ダミー層
20 交互誘電体スタック
22 誘電層
22A 底部誘電層
24 犠牲層
24A 底部犠牲層
26 第1のキャップ層
30 鉛直構造
31 障壁層
32 記憶層
33 トンネル層
34 半導体層
35 充填構造
36 導電構造
42 第2のキャップ層
44 スリット
48 隙間
50 エピタキシャル層
50P 突出部
52 絶縁層
54 凹部
56 第2のドープ領域
60 交互導電体/誘電体スタック
62 導電層
70 交互導電体/誘電体スタック
72 導電層
74 誘電層
76 第3のキャップ層
78 第4のキャップ層
101、102 3Dメモリ装置
D1 鉛直方向
D2 水平方向
H1 第1の通路孔
H2 第2の通路孔
V エアボイド
Claims (19)
- 交互誘電体スタックを基板に形成するステップと、
前記基板の表面に対して垂直の鉛直方向に前記交互誘電体スタックを貫通する鉛直構造を形成するステップと、
前記交互誘電体スタックの底部誘電層を除去するステップと、
前記底部誘電層を除去するステップの後、前記基板と前記交互誘電体スタックとの間にエピタキシャル層を形成するステップと、
絶縁層を前記エピタキシャル層上に形成するステップであって、前記絶縁層は前記エピタキシャル層と前記交互誘電体スタックとの間に位置する、ステップと
を含み、
前記エピタキシャル層は、前記絶縁層を形成する前に隙間によって前記交互誘電体スタックから分離される、三次元(3D)メモリ装置の製造方法。 - 前記絶縁層は、前記エピタキシャル層に酸化工程を実施することで形成される、請求項1に記載の3Dメモリ装置の製造方法。
- 前記エピタキシャル層は、前記鉛直方向に対して直交する水平方向において、前記絶縁層と前記鉛直構造との間に位置する突出部を備える、請求項1に記載の3Dメモリ装置の製造方法。
- 前記エピタキシャル層の上面が、前記鉛直方向において前記絶縁層の底面より高い、請求項1に記載の3Dメモリ装置の製造方法。
- 前記交互誘電体スタックを形成するステップの前に前記基板にドープ領域を形成するステップであって、前記エピタキシャル層は選択エピタキシャル成長(SEG)工程によって前記ドープ領域に形成される、ステップをさらに含む、請求項1に記載の3Dメモリ装置の製造方法。
- 前記鉛直構造の一部が前記交互誘電体スタックの下方に位置し、前記鉛直構造は、半導体層と、前記半導体層を包囲する記憶層とを備え、前記製造方法は、
前記エピタキシャル層を形成するステップの前に、前記交互誘電体スタックの下方の前記半導体層の一部を露出させるために前記記憶層の一部を除去するステップであって、前記エピタキシャル層は前記半導体層の前記露出された一部と連結される、ステップをさらに含む、請求項1に記載の3Dメモリ装置の製造方法。 - 前記交互誘電体スタックを形成するステップの前にダミー層を前記基板に形成するステップであって、前記ダミー層は前記鉛直方向において前記基板と前記交互誘電体スタックとの間に位置する、ステップと、
前記エピタキシャル層を形成するステップの前に前記ダミー層を除去するステップと
をさらに含む、請求項1に記載の3Dメモリ装置の製造方法。 - 前記交互誘電体スタックを貫通するスリットを形成するステップと、前記ダミー層を除去するステップの前かつ前記鉛直構造を形成するステップの後に前記ダミー層の一部を露出させるステップとをさらに含む、請求項7に記載の3Dメモリ装置の製造方法。
- 前記交互誘電体スタックは、前記鉛直方向において交互に積み重ねられた複数の誘電層と複数の犠牲層とを備える、請求項1に記載の3Dメモリ装置の製造方法。
- 交互導電体/誘電体スタックを形成するように、前記犠牲層を導電層で置き換えるステップをさらに含む、請求項9に記載の3Dメモリ装置の製造方法。
- 前記絶縁層を形成するステップの前に前記犠牲層が除去され、前記絶縁層を形成するステップの後に前記導電層が形成される、請求項10に記載の3Dメモリ装置の製造方法。
- 前記底部誘電層の厚さが、前記交互誘電体スタック内の他の誘電層の各々の厚さより小さい、請求項1に記載の3Dメモリ装置の製造方法。
- 基板と、
前記基板に配置された交互導電体/誘電体スタックであって、前記基板の表面に対して垂直の鉛直方向において交互に積み重ねられた複数の誘電層および複数の導電層を備える交互導電体/誘電体スタックと、
前記鉛直方向において前記基板と前記交互導電体/誘電体スタックとの間に配置され、前記基板と前記交互導電体/誘電体スタックとの隙間を完全に埋めるエピタキシャル層と、
部分的に前記エピタキシャル層に配置されるために、前記鉛直方向に前記交互導電体/誘電体スタックを貫通する鉛直構造であって、前記エピタキシャル層は、前記鉛直方向に対して直交する水平方向において前記鉛直構造と前記交互導電体/誘電体スタックの底部誘電層との間に配置された突出部を備える、鉛直構造と
を備える三次元(3D)メモリ装置。 - 前記交互導電体/誘電体スタックの前記底部誘電層は前記水平方向において前記エピタキシャル層の前記突出部を包囲する、請求項13に記載の3Dメモリ装置。
- 前記エピタキシャル層の上面が、前記鉛直方向において前記底部誘電層の底面より高い、請求項13に記載の3Dメモリ装置。
- 前記鉛直構造は、半導体層と、前記半導体層を包囲する記憶層とを備える、請求項13に記載の3Dメモリ装置。
- 前記エピタキシャル層は前記鉛直構造の前記半導体層と接触する、請求項16に記載の3Dメモリ装置。
- 前記エピタキシャル層の前記突出部は、前記鉛直構造の前記半導体層を包囲して前記半導体層に接触する、請求項16に記載の3Dメモリ装置。
- 前記エピタキシャル層は前記基板にドープ井戸領域を備える、請求項13に記載の3Dメモリ装置。
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CN111223872B (zh) * | 2020-01-17 | 2023-04-07 | 长江存储科技有限责任公司 | 一种3d nand存储器及其制造方法 |
KR20210105741A (ko) * | 2020-02-19 | 2021-08-27 | 에스케이하이닉스 주식회사 | 반도체 장치 및 반도체 장치의 제조 방법 |
WO2021184176A1 (en) * | 2020-03-17 | 2021-09-23 | Yangtze Memory Technologies Co., Ltd. | Three-dimensional memory devices and fabricating methods thereof |
CN111492481B (zh) * | 2020-03-20 | 2021-06-22 | 长江存储科技有限责任公司 | 三维存储器件和制作方法 |
JP7257545B2 (ja) * | 2020-03-20 | 2023-04-13 | 長江存儲科技有限責任公司 | 三次元メモリデバイス及びその動作方法 |
WO2021208195A1 (en) * | 2020-04-14 | 2021-10-21 | Yangtze Memory Technologies Co., Ltd. | Methods for forming three-dimensional memory devices |
CN111788687B (zh) | 2020-04-14 | 2021-09-14 | 长江存储科技有限责任公司 | 用于形成三维存储器件的方法 |
CN111430364B (zh) * | 2020-04-22 | 2023-08-08 | 长江存储科技有限责任公司 | 半导体器件结构及其制备方法 |
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