JP7304335B2 - Nandメモリデバイスおよびnandメモリデバイスを形成するための方法 - Google Patents
Nandメモリデバイスおよびnandメモリデバイスを形成するための方法 Download PDFInfo
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Description
Claims (15)
- NANDメモリデバイスであって、
基板と、
前記基板上の1つまたは複数の周辺デバイスと、
前記1つまたは複数の周辺デバイスの上側の複数のNANDストリングと、
前記複数のNANDストリングの上側にあり、前記複数のNANDストリングに接触する単結晶シリコン層であって、分離領域およびドープ領域を含む単結晶シリコン層と、
前記1つまたは複数の周辺デバイスと前記複数のNANDストリングとの間に形成された1つまたは複数の第1の相互接続層であって、1つまたは複数の誘電体層内に形成された導体層のうちの1つまたは複数の層を有する第1の相互接続層と、
前記1つまたは複数の周辺デバイスと前記複数のNANDストリングとの間に形成された1つまたは複数の第2の相互接続層であって、1つまたは複数の誘電体層内に形成された導体層のうちの1つまたは複数の層を有する第2の相互接続層と、
交互の導体/誘電体スタックであって、前記分離領域は、前記交互の導体/誘電体スタックの上側で前記交互の導体/誘電体スタックに接触している、交互の導体/誘電体スタックと、
前記交互の導体/誘電体スタックを通って延び、かつ、前記単結晶シリコン層における前記分離領域の少なくとも一部を通って延びる貫通アレイ接点と、を備え、
前記第1の相互接続層及び前記第2の相互接続層は、結合インタフェースにおいて互いに接触しており、
前記第1の相互接続層及び前記第2の相互接続層の少なくとも一方が有する前記1つまたは複数の層の少なくとも1つは、積層の方向に交差して延びる、
NANDメモリデバイス。 - 前記NANDストリングのそれぞれは、
前記交互の導体/誘電体スタックを通って垂直に延びる半導体チャネルと、
前記交互の導体/誘電体スタックと前記半導体チャネルとの間のトンネル層と、
前記トンネル層と前記交互の導体/誘電体スタックとの間の蓄積層とを有する、
請求項1に記載のNANDメモリデバイス。 - 複数の第1の接点をさらに備え、前記複数の第1の接点のそれぞれは、垂直に延びており、前記交互の導体/誘電体スタックの導体層に接触する上端を有する、
請求項2に記載のNANDメモリデバイス。 - 第2の接点をさらに備え、前記第2の接点は、前記交互の導体/誘電体スタックを通って垂直に延びており、前記単結晶シリコン層に接触する上端を有する、
請求項2に記載のNANDメモリデバイス。 - 前記複数のNANDストリングは、別のNANDストリングの上側のNANDストリングを含む、
請求項1に記載のNANDメモリデバイス。 - 前記NANDストリングおよび前記別のNANDストリングは、導体によって電気的に接続される、
請求項5に記載のNANDメモリデバイス。 - NANDメモリデバイスであって、
基板と、
前記基板上の交互の導体/誘電体スタックと、
複数のNANDストリングであって、前記複数のNANDストリングのそれぞれは、
前記交互の導体/誘電体スタックを通って垂直に延びる半導体チャネルと、
前記交互の導体/誘電体スタックと前記半導体チャネルとの間のトンネル層と、
前記トンネル層と前記交互の導体/誘電体スタックとの間の蓄積層とを有する、
複数のNANDストリングと、
前記基板と前記複数のNANDストリングとの間に形成された1つまたは複数の第1の相互接続層であって、1つまたは複数の誘電体層内に形成された導体層のうちの1つまたは複数の層を有する第1の相互接続層と、
前記基板と前記複数のNANDストリングとの間に形成された1つまたは複数の第2の相互接続層であって、1つまたは複数の誘電体層内に形成された導体層のうちの1つまたは複数の層を有する第2の相互接続層と、
前記複数のNANDストリングに接触する、前記複数のNANDストリングの上側の単結晶シリコン層であって、分離領域およびドープ領域を含む単結晶シリコン層と、
前記交互の導体/誘電体スタックを通って延び、かつ、前記単結晶シリコン層における前記分離領域の少なくとも一部を通って延びる貫通アレイ接点と、を備え、
前記分離領域は、前記交互の導体/誘電体スタックの上側で前記交互の導体/誘電体スタックに接触しており、
前記第1の相互接続層及び前記第2の相互接続層は、結合インタフェースにおいて互いに接触しており、
前記第1の相互接続層及び前記第2の相互接続層の少なくとも一方が有する前記1つまたは複数の層の少なくとも1つは、積層の方向に交差して延びる、
NANDメモリデバイス。 - 前記複数のNANDストリングのそれぞれは、前記NANDストリングの上端にエピタキシャルプラグをさらに有する、
請求項7に記載のNANDメモリデバイス。 - 複数の第1の接点をさらに備え、前記複数の第1の接点のそれぞれは、前記複数のNANDストリングの対応する1つの下端の下側にあり、前記複数のNANDストリングの対応する1つの下端に接触する、
請求項7に記載のNANDメモリデバイス。 - 第2の接点をさらに備え、前記第2の接点は、前記交互の導体/誘電体スタックを通って垂直に延びており、前記単結晶シリコン層に接触する上端を有する、
請求項7に記載のNANDメモリデバイス。 - 前記複数のNANDストリングのそれぞれは、前記NANDストリングの端部に選択ゲートをさらに有する、
請求項7に記載のNANDメモリデバイス。 - 前記基板上かつ前記複数のNANDストリングの下側に周辺デバイスをさらに備える、
請求項7に記載のNANDメモリデバイス。 - NANDメモリデバイスを形成するための方法であって、
第1の基板上に1つまたは複数の周辺デバイスの形成を行うことと、
第2の基板上に交互の導体/誘電体スタックの形成を行うことと、
前記第2の基板上に複数のNANDストリングの形成を行うことと、
前記1つまたは複数の周辺デバイス用の第1の相互接続層であって、1つまたは複数の誘電体層内に形成された導体層のうちの1つまたは複数の層を有する第1の相互接続層、及び、前記複数のNANDストリング用の第2の相互接続層であって、1つまたは複数の誘電体層内に形成された導体層のうちの1つまたは複数の層を有する第2の相互接続層の形成を行うことと、
前記第2の基板が前記複数のNANDストリングの上側にあり、かつ、前記第1の相互接続層及び前記第2の相互接続層が、結合インタフェースにおいて互いに接触するように、前記1つまたは複数の周辺デバイスの上側に前記複数のNANDストリングの位置決めを行うことと、
前記複数のNANDストリングと前記1つまたは複数の周辺デバイスとの接合を行うことと、
薄くされた前記第2の基板が前記複数のNANDストリングの上側で前記複数のNANDストリングに接触する単結晶シリコン層としての役割を果たすように、前記第2の基板の薄化を行うことと、
前記第2の基板に分離領域であって、前記分離領域は、前記交互の導体/誘電体スタックの上側で前記交互の導体/誘電体スタックに接触している分離領域およびドープ領域を形成することと、
前記交互の導体/誘電体スタックを通って延び、かつ、前記単結晶シリコン層における前記分離領域の少なくとも一部を通って延びる貫通アレイ接点を形成することと、を含み、 前記第1の相互接続層及び前記第2の相互接続層の少なくとも一方が有する前記1つまたは複数の層の少なくとも1つは、積層の方向に交差して延びる、
方法。 - 前記単結晶シリコン層の上側に第3の相互接続層の形成を行うことをさらに含む、
請求項13に記載の方法。 - 前記接合が、熱処理および/またはプラズマ処理によって接合することを含む、
請求項13に記載の方法。
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US11211397B2 (en) | 2021-12-28 |
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KR20200008157A (ko) | 2020-01-23 |
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US11805646B2 (en) | 2023-10-31 |
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