JP7447152B2 - 接着層によって連結されるソースコンタクトを伴う三次元メモリデバイス、およびそれを形成するための方法 - Google Patents
接着層によって連結されるソースコンタクトを伴う三次元メモリデバイス、およびそれを形成するための方法 Download PDFInfo
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- H01L29/41725—Source or drain electrodes for field effect devices
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- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
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Description
22 ソース領域
100 3Dメモリデバイス
102 基板
104 ソースコンタクト
104’ ソースコンタクト
108 連結層
108’ 連結層
110 チャネル構造
111 スタック構造
114 切断層
115 キャップ層
123 導体層
124 絶縁層
125 誘電キャップ層
220 支持構造
221 部分スタック
223 導体部分
224 絶縁部分
225 スペーサ層
232 接着層
232a、232b、232c、232d、232e、232f、232g 接着部分
302、306、308 パターン
510 切断開口
520 開口
533 初期犠牲層
534 初期絶縁層
610 誘電性材料
710 犠牲材料
810 切断構造
814 犠牲層
910 キャップ材料
1004 スリット開口
1010 初期支持構造
1020 スリット構造
1023 犠牲部分
1024 絶縁部分
1114 開口
1123 リセス部分
1200 構造
1223 導体部分
1510 接着層
1610 導電性材料
2000 メモリデバイス
2002 基板
2004 チャネル構造
2006-1 GLS
2006-2 GLS
2011 メモリスタック
d1 切断層114の幅
d2 支持構造の幅
D1 パターン306の長さ
D2 パターン302の長さ
W1 パターン306の幅
W2 パターン302の幅
Claims (13)
- 基板にわたるメモリスタックであって、交互の複数の導体層および複数の絶縁層を備えるメモリスタックと、
前記メモリスタックにおいて鉛直に延びる複数のチャネル構造と、
前記メモリスタックにおいて延びる単一のソース構造であって、
前記ソース構造を第1の区域と第2の区域とに分割する支持構造、および、
接着層であって、前記接着層の少なくとも一部分が、前記支持構造を通じて延び、前記第1の区域と前記第2の区域とを導電的に連結する、接着層
を備えるソース構造と
を備え、
前記接着層は、
前記第1の区域と前記支持構造との間の第1の部分と、
前記第2の区域と前記支持構造との間の第2の部分と、
前記支持構造を通じて延びる前記接着層の前記一部分を含む第3の部分と
を備え、
前記第1の部分および前記第2の部分は前記第3の部分と導電的に連結され、
前記第1の区域は、前記第1の部分と接触する第1のソースコンタクトを備え、
前記第2の区域は、前記第2の部分と接触する第2のソースコンタクトを備え、
前記接着層は、
前記第1のソースコンタクト上における第4の部分と、
前記第2のソースコンタクト上における第5の部分と、
をさらに備え、
前記第1の区域は、前記第4の部分を介して前記第1のソースコンタクトに導電的に連結される第1の連結層を備え、
前記第2の区域は、前記第5の部分を介して前記第2のソースコンタクトに導電的に連結される第2の連結層を備える、三次元(3D)メモリデバイス。 - 前記支持構造は、前記接着層の前記第3の部分にわたって切断層を備え、
前記切断層は前記第1の連結層と前記第2の連結層との間にある、請求項1に記載の3Dメモリデバイス。 - 前記ソース構造が沿って延びる横方向に沿って、前記切断層の幅が、前記接着層の前記第3の部分の下における前記支持構造の幅と等しい、請求項2に記載の3Dメモリデバイス。
- 前記接着層は、Ti、Ta、Cr、W、TiNx、TaNx、CrNx、WNx、TiSixNy、TaSixNy、CrSixNy、またはWSixNyのうちの少なくとも1つを含む、請求項1に記載の3Dメモリデバイス。
- 三次元(3D)メモリデバイスを形成するための方法であって、
犠牲層を備える切断構造をスタック構造に形成するステップと、
スリット構造および初期支持構造を形成するために、前記切断構造に隣接する前記スタック構造の一部分を除去するステップであって、前記初期支持構造は前記スリット構造を複数のスリット開口へと分割する、ステップと、
前記切断構造の前記犠牲層を除去することで、前記初期支持構造に開口を形成するステップと、
前記複数のスリット開口を通じて前記初期支持構造に複数の導体部分を形成するステップと、
前記初期支持構造の前記開口に接着材料を堆積させるステップであって、堆積させられた前記接着材料は、前記初期支持構造を通じて延びる接着層の少なくとも一部分を形成する、ステップと、
支持構造を形成するために前記初期支持構造の前記開口を満たすステップと、
前記複数のスリット開口の各々においてソースコンタクトを形成するステップであって、少なくとも2つのソースコンタクトが前記接着層に導電的に連結される、ステップと
を含む方法。 - 前記切断構造を形成するステップは、
前記スタック構造に切断開口を形成するステップと、
前記切断開口に誘電性材料を堆積させるステップと
を含む、請求項5に記載の方法。 - 前記切断構造を形成するステップは、
前記切断開口を満たすために前記誘電性材料にわたって犠牲材料を堆積させるステップを含む、請求項6に記載の方法。 - 前記切断構造を形成するステップは、
前記切断構造を形成するために、堆積させられた前記犠牲材料の一部を除去するステップを含む、請求項7に記載の方法。 - 前記複数の導体部分を形成するステップは、
複数のリセス部分を形成するために、前記複数のスリット開口を通じて、前記初期支持構造における複数の犠牲部分を除去するステップと、
前記複数のリセス部分を満たして前記複数の導体部分を形成するために、導体材料を堆積させるステップと
を含む、請求項5に記載の方法。 - 前記初期支持構造の周りにスペーサ層を形成するステップをさらに含む、請求項5に記載の方法。
- 前記スペーサ層にわたって接着材料を堆積させるステップであって、堆積させられた前記接着材料は前記接着層の一部を形成する、ステップをさらに含む、請求項10に記載の方法。
- 前記ソースコンタクトを形成するステップは、
それぞれの前記スリット開口を満たすためにポリシリコンを堆積させるステップと、
前記ソースコンタクトを形成するために、堆積させられた前記ポリシリコンの一部を除去するステップと
を含む、請求項5に記載の方法。 - 前記ソースコンタクトを形成するステップの後、接着材料を、堆積させられた前記接着材料が前記接着層と接触するように前記ソースコンタクトにわたって堆積させるステップをさらに含む、請求項12に記載の方法。
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WO2021026756A1 (en) | 2019-08-13 | 2021-02-18 | Yangtze Memory Technologies Co., Ltd. | Three-dimensional memory device with source structure and methods for forming the same |
EP3921868B1 (en) | 2019-08-13 | 2024-01-31 | Yangtze Memory Technologies Co., Ltd. | Three-dimensional memory device with source structure and methods for forming the same |
WO2021026755A1 (en) | 2019-08-13 | 2021-02-18 | Yangtze Memory Technologies Co., Ltd. | Three-dimensional memory device with source structure and methods for forming the same |
WO2021035738A1 (en) * | 2019-08-30 | 2021-03-04 | Yangtze Memory Technologies Co., Ltd. | Three-dimensional memory device with source contacts connected by adhesion layer and methods for forming the same |
CN111448660B (zh) | 2020-03-02 | 2021-03-23 | 长江存储科技有限责任公司 | 具有源极结构的三维存储器件及其形成方法 |
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