JP7297923B2 - 3次元メモリデバイス及び方法 - Google Patents
3次元メモリデバイス及び方法 Download PDFInfo
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- JP7297923B2 JP7297923B2 JP2021557455A JP2021557455A JP7297923B2 JP 7297923 B2 JP7297923 B2 JP 7297923B2 JP 2021557455 A JP2021557455 A JP 2021557455A JP 2021557455 A JP2021557455 A JP 2021557455A JP 7297923 B2 JP7297923 B2 JP 7297923B2
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Description
本出願は、2020年5月27日に出願された「3次元メモリデバイス」と題する国際出願第PCT/CN2020/092499号、2020年5月27日に出願された「3次元メモリデバイスを形成するための方法」と題する国際出願第PCT/CN2020/092501号、2020年5月27日に出願された「3次元メモリデバイス」と題する国際出願第PCT/CN2020/092504号、2020年5月27日に出願された「3次元メモリデバイスを形成するための方法」と題する国際出願第PCT/CN2020/092506号、2020年5月27日に出願された「3次元メモリデバイス」と題する国際出願第PCT/CN2020/092512号、および、2020年5月27日に出願された「3次元メモリデバイスを形成するための方法」と題する国際出願第PCT/CN2020/092513号、の優先権の利益を主張し、その全体が参照により本明細書に組み込まれる。
Claims (16)
- 3次元メモリデバイスであって、
基板と、
前記基板の上方にある周辺回路と、
前記周辺回路の上方にある交互配置された導電層および誘電体層を備えるメモリスタックと、
各々が前記メモリスタックを貫通して垂直に延在する複数のチャネル構造と、
前記メモリスタックの上方にあり、前記複数のチャネル構造に電気的に接続された第1のソースコンタクトと、
前記メモリスタックの上方にあり、前記複数のチャネル構造に電気的に接続された第2のソースコンタクトと、
前記第1のソースコンタクトに接触する第1の相互接続部と、
前記第2のソースコンタクトに接触する第2の相互接続部と、
前記メモリスタックの上方にあるP型ドープ半導体層であって、前記第1のソースコンタクトは、前記P型ドープ半導体層に接触する、P型ドープ半導体層と、
を備える、3次元メモリデバイス。 - 前記複数のチャネル構造の上端に接触する導電層を備える
請求項1に記載の3次元メモリデバイス。 - 前記P型ドープ半導体層内のNウェルであって、前記第2のソースコンタクトは、前記Nウェルに接触する、Nウェル、
をさらに備える、請求項2に記載の3次元メモリデバイス。 - 前記P型ドープ半導体層の上方にある1つまたは複数の層間誘電体(ILD)層であって、
前記第1のソースコンタクトは、前記1つまたは複数のILD層および前記導電層を貫通して、前記P型ドープ半導体層内に垂直に延在し、
前記第2のソースコンタクトは、前記1つまたは複数のILD層、前記導電層、および前記P型ドープ半導体層を貫通して、前記Nウェル内に垂直に延在する、層間誘電体(ILD)層を、さらに備える、請求項3に記載の3次元メモリデバイス。 - 前記第2のソースコンタクトは、前記P型ドープ半導体層から電気的に分離されるように、前記第2のソースコンタクトの側壁を囲むスペーサを備える、請求項3または4に記載の3次元メモリデバイス。
- 3次元メモリデバイスであって、
基板と、
前記基板の上方にある周辺回路と、
前記周辺回路の上方にある交互配置された導電層および誘電体層を備えるメモリスタックと、
各々が前記メモリスタックを貫通して垂直に延在する複数のチャネル構造と、
前記複数のチャネル構造の上端に接触する導電層と、
前記メモリスタックの上方にあり、前記複数のチャネル構造に電気的に接続された第1のソースコンタクトと、
前記メモリスタックの上方にあり、前記複数のチャネル構造に電気的に接続された第2のソースコンタクトと、
前記第1のソースコンタクトに接触する第1の相互接続部と、
前記第2のソースコンタクトに接触する第2の相互接続部と、
を備え、
前記第1のソースコンタクトは、前記複数のチャネル構造と垂直に整列していない、3次元メモリデバイス。 - 前記周辺回路と前記メモリスタックとの間の接合インターフェイスをさらに備える、請求項1から4のいずれか一項に記載の3次元メモリデバイス。
- 前記P型ドープ半導体層を貫通する第1のコンタクトであって、前記P型ドープ半導体層は、少なくとも前記第1のソースコンタクト、前記第1の相互接続部、および前記第1のコンタクトを介して、前記周辺回路に電気的に接続される、第1のコンタクトと、
前記P型ドープ半導体層を貫通する第2のコンタクトであって、前記Nウェルは、少なくとも前記第2のソースコンタクト、前記第2の相互接続部、および前記第2のコンタクトを介して、前記周辺回路に電気的に接続される、第2のコンタクトと、
をさらに備える、請求項3または4に記載の3次元メモリデバイス。 - 3次元メモリデバイスを形成するための方法であって、
基板の上方にある周辺回路を形成するステップと、
前記周辺回路の上方にあり、交互配置された導電層および誘電体層を備えるメモリスタックを形成するステップと、
各々が前記メモリスタックを貫通して垂直に延在する複数のチャネル構造を形成するステップと、
前記メモリスタックの上方にあり、前記複数のチャネル構造に電気的に接続された第1のソースコンタクトを形成するステップと、
前記メモリスタックの上方にあり、前記複数のチャネル構造に電気的に接続された第2のソースコンタクトを形成するステップと、
前記第1のソースコンタクトに接触する第1の相互接続部を形成するステップと、
前記第2のソースコンタクトに接触する第2の相互接続部を形成するステップと、
前記メモリスタックの上方にあり、P型ドープ半導体層を形成するステップであって、前記第1のソースコンタクトは、前記P型ドープ半導体層に接触する、ステップと、
を含む方法。 - 前記複数のチャネル構造の上端に接触する導電層を形成するステップを含む
請求項9に記載の方法。 - 前記P型ドープ半導体層内にNウェルを形成するステップであって、前記第2のソースコンタクトは、前記Nウェルに接触する、ステップ
をさらに含む請求項10に記載の方法。 - 前記P型ドープ半導体層の上方にある1つまたは複数の層間誘電体(ILD)層を形成するステップであって、
前記第1のソースコンタクトは、前記1つまたは複数のILD層および前記導電層を貫通して、前記P型ドープ半導体層内に垂直に延在し、
前記第2のソースコンタクトは、前記1つまたは複数のILD層、前記導電層、および前記P型ドープ半導体層を貫通して、前記Nウェル内に垂直に延在する、ステップを、さらに含む請求項11に記載の方法。 - 前記第2のソースコンタクトの側壁を囲むスペーサを形成するステップを、さらに含む、請求項11または12に記載の方法。
- 3次元メモリデバイスを形成するための方法であって、
基板の上方にある周辺回路を形成するステップと、
前記周辺回路の上方にあり、交互配置された導電層および誘電体層を備えるメモリスタックを形成するステップと、
各々が前記メモリスタックを貫通して垂直に延在する複数のチャネル構造を形成するステップと、
前記複数のチャネル構造の上端に接触する導電層を形成するステップと、
前記メモリスタックの上方にあり、前記複数のチャネル構造に電気的に接続された第1のソースコンタクトを形成するステップと、
前記メモリスタックの上方にあり、前記複数のチャネル構造に電気的に接続された第2のソースコンタクトを形成するステップと、
前記第1のソースコンタクトに接触する第1の相互接続部を形成するステップと、
前記第2のソースコンタクトに接触する第2の相互接続部を形成するステップと、
を含み、
前記第1のソースコンタクトを形成するステップは、前記第1のソースコンタクトが前記複数のチャネル構造と垂直に整列しないように、前記第1のソースコンタクトを形成するステップを含む方法。 - 前記周辺回路と前記メモリスタックとの間に接合インターフェイスを形成するステップをさらに含む、請求項9から12のいずれか一項に記載の方法。
- 前記P型ドープ半導体層を貫通して第1のコンタクトを形成するステップであって、
前記P型ドープ半導体層は、少なくとも前記第1のソースコンタクト、前記第1の相互接続部、および前記第1のコンタクトを介して、前記周辺回路に電気的に接続される、ステップと、
前記P型ドープ半導体層を貫通して第2のコンタクトを形成するステップであって、
前記Nウェルは、少なくとも前記第2のソースコンタクト、前記第2の相互接続部、および前記第2のコンタクトを介して、前記周辺回路に電気的に接続される、ステップと、
をさらに含む請求項11または12に記載の方法。
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PCT/CN2020/092499 WO2021237488A1 (en) | 2020-05-27 | 2020-05-27 | Three-dimensional memory devices |
CNPCT/CN2020/092499 | 2020-05-27 | ||
PCT/CN2020/092506 WO2021237492A1 (en) | 2020-05-27 | 2020-05-27 | Methods for forming three-dimensional memory devices |
PCT/CN2020/092513 WO2021208195A1 (en) | 2020-04-14 | 2020-05-27 | Methods for forming three-dimensional memory devices |
CNPCT/CN2020/092512 | 2020-05-27 | ||
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PCT/CN2020/092501 WO2021237489A1 (en) | 2020-05-27 | 2020-05-27 | Methods for forming three-dimensional memory devices |
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