JP2022521631A - 三次元メモリデバイス及びその形成方法 - Google Patents
三次元メモリデバイス及びその形成方法 Download PDFInfo
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- JP2022521631A JP2022521631A JP2021549994A JP2021549994A JP2022521631A JP 2022521631 A JP2022521631 A JP 2022521631A JP 2021549994 A JP2021549994 A JP 2021549994A JP 2021549994 A JP2021549994 A JP 2021549994A JP 2022521631 A JP2022521631 A JP 2022521631A
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Abstract
Description
Claims (25)
- 三次元(3D)メモリデバイスであって、
周辺回路と、埋め込みダイナミックランダムアクセスメモリ(DRAM)セルのアレイと、複数の第1の接合コンタクトを備える第1の接合層とを備える第1の半導体構造と、
3D NANDメモリストリングのアレイと、複数の第2の接合コンタクトを備える第2の接合層とを備える第2の半導体構造と、
前記第1の接合層と前記第2の接合層との間の接合界面であって、前記第1の接合コンタクトが前記接合界面で前記第2の接合コンタクトと接触している、接合界面と、を備える三次元(3D)メモリデバイス。 - 前記第1の半導体構造は、
基板と、
前記基板上の前記周辺回路と、
前記基板上及び前記周辺回路の外側の前記埋め込みDRAMセルのアレイと、
前記周辺回路及び前記埋め込みDRAMセルのアレイの上の前記第1の接合層と、を備える、請求項1に記載の3Dメモリデバイス。 - 前記第2の半導体構造は、
前記第1の接合層の上の前記第2の接合層と、
前記第2の接合層の上のメモリスタックと、
前記メモリスタックを垂直に貫通する3D NANDメモリストリングのアレイと、
前記3D NANDメモリストリングのアレイの上にあり、前記3D NANDメモリストリングのアレイと接触している半導体層と、を備える、請求項2に記載の3Dメモリデバイス。 - 前記半導体層の上にパッドアウト相互接続層をさらに備える、請求項3に記載の3Dメモリデバイス。
- 前記半導体層はポリシリコンを含む、請求項3又は4に記載の3Dメモリデバイス。
- 前記半導体層は単結晶シリコンを含む、請求項3又は4に記載の3Dメモリデバイス。
- 前記第2の半導体構造は、
基板と、
前記基板の上のメモリスタックと、
前記メモリスタックを垂直に貫通する前記3D NANDメモリストリングのアレイと、
前記メモリスタック及び前記3D NANDメモリストリングのアレイの上の前記第2の接合層と、を備える、請求項1に記載の3Dメモリデバイス。 - 前記第1の半導体構造は、
前記第2の接合層の上の前記第1の接合層と、
前記第1の接合層の上の前記周辺回路と、
前記第1の接合層の上及び前記周辺回路の外側にある前記埋め込みDRAMセルのアレイと、
前記周辺回路及び前記埋め込みDRAMセルのアレイの上にあり、前記周辺回路及び前記埋め込みDRAMセルのアレイと接触している半導体層と、を備える、請求項7に記載の3Dメモリデバイス。 - 前記半導体層の上にパッドアウト相互接続層をさらに備える、請求項8に記載の3Dメモリデバイス。
- 前記周辺回路及び前記埋め込みDRAMセルのアレイは、一方が他方の上方に積層される、請求項1に記載の3Dメモリデバイス。
- 各埋め込みDRAMセルは、トランジスタ及びキャパシタを備える、請求項1から10のいずれか一項に記載の3Dメモリデバイス。
- 前記第1の半導体構造は、垂直方向で前記第1の接合層と前記埋め込みDRAMセルのアレイとの間に第1の相互接続層を備え、前記第2の半導体構造は、垂直方向で前記第2の接合層と前記3D NANDメモリストリングのアレイとの間に第2の相互接続層を備える、請求項1から11のいずれか一項に記載の3Dメモリデバイス。
- 前記埋め込みDRAMセルのアレイは、前記第1及び第2の相互接続層並びに前記第1及び第2の接合コンタクトを介して前記3D NANDメモリストリングのアレイに電気的に接続される、請求項12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、
周辺回路と、埋め込みダイナミックランダムアクセスメモリ(DRAM)セルのアレイと、複数の第1の接合コンタクトを備える第1の接合層とを備える第1の半導体構造を形成することと、
3D NANDメモリストリングのアレイと、複数の第2の接合コンタクトを備える第2の接合層とを備える第2の半導体構造を形成することと、
前記第1の接合コンタクトが接合界面で前記第2の接合コンタクトと接触するように、前記第1の半導体構造と前記第2の半導体構造とを対面方式で接合することと、を含む方法。 - 前記第1の半導体構造を形成することは、
第1の基板上に前記周辺回路及び前記埋め込みDRAMセルのアレイを形成することと、
前記周辺回路及び前記埋め込みDRAMセルのアレイの上に第1の相互接続層を形成することと、
前記第1の相互接続層の上に前記第1の接合層を形成することと、を含む、請求項14に記載の方法。 - 前記周辺回路及び前記埋め込みDRAMセルのアレイを形成することは、
前記第1の基板上に複数のトランジスタを形成することと、
いくつかの前記トランジスタの上にあり、いくつかの前記トランジスタと接触する複数のキャパシタを形成することと、を含む、請求項15に記載の方法。 - 前記第2の半導体構造を形成することは、
第2の基板の上にメモリスタックを形成することと、
前記メモリスタックを垂直に貫通する前記3D NANDメモリストリングのアレイを形成することと、
前記3D NANDメモリストリングのアレイの上に第2の相互接続層を形成することと、
前記第2の相互接続層の上に前記第2の接合層を形成することと、を含む、請求項14から16のいずれか一項に記載の方法。 - 前記第2の半導体構造は、前記接合後に前記第1の半導体構造の上にある、請求項14から17のいずれか一項に記載の方法。
- 前記接合後に、前記第2の基板を薄くして半導体層を形成することと、
前記半導体層の上にパッドアウト相互接続層を形成することと、をさらに含む、請求項18に記載の方法。 - 前記第1の半導体構造は、前記接合後に前記第2の半導体構造の上にある、請求項14から17のいずれか一項に記載の方法。
- 前記接合後に、前記第1の基板を薄くして半導体層を形成することと、
前記半導体層の上にパッドアウト相互接続層を形成することと、をさらに含む、請求項20に記載の方法。 - 前記接合がハイブリッド接合を含む、請求項14から21のいずれか一項に記載の方法。
- 同じチップ内に、入力/出力回路と、埋め込みダイナミックランダムアクセスメモリ(DRAM)セルのアレイと、3D NANDメモリストリングのアレイとを備える三次元(3D)メモリデバイスを動作させるための方法であって、
前記入力/出力回路を介して前記埋め込みDRAMセルのアレイにデータを転送することと、
前記埋め込みDRAMセルのアレイ内の前記データをバッファすることと、
前記埋め込みDRAMセルのアレイから前記3D NANDメモリストリングのアレイ内に前記データを格納することと、を含む、方法。 - 複数の接合コンタクトを介して前記3D NANDメモリストリングのアレイと前記埋め込みDRAMセルのアレイとの間で前記データを転送することをさらに含む、請求項23に記載の方法。
- 前記転送することは、前記3Dメモリデバイスの電源オン又は電源オフに応答してトリガされる、請求項23又は24に記載の方法。
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CN110249427A (zh) | 2019-09-17 |
JP7328344B2 (ja) | 2023-08-16 |
TWI784180B (zh) | 2022-11-21 |
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US10984862B2 (en) | 2021-04-20 |
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