JP7655853B2 - 垂直型薄膜トランジスタ、及び、垂直型薄膜トランジスタの、3次元メモリアレイのためのビット線コネクタとしての応用メモリ回路方法 - Google Patents
垂直型薄膜トランジスタ、及び、垂直型薄膜トランジスタの、3次元メモリアレイのためのビット線コネクタとしての応用メモリ回路方法 Download PDFInfo
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Description
Claims (11)
- メモリ回路であって、
平坦な表面を有する半導体基板であって、前記平坦な表面上の場所に作製されたメモリ動作用回路を有する、半導体基板と、
前記平坦な表面上に形成された、第1の導体層を含むメモリ構造体中に形成されたメモリアレイをなすメモリセルのアレイであって、前記メモリ構造体の前記第1の導体層が、各々が前記平坦な表面に対して実質的に平行をなす第1の方向に沿って延在する1以上の導体を有し、かつ前記メモリセルに対して又は前記メモリセルから、電気信号を伝送する、該メモリアレイと、
前記第1の導体層の前記導体のうちの対応するものの上側、横側、又は下側の位置であり、かつ前記半導体基板の前記平坦な表面上の場所に作製された前記メモリ動作用回路より上側の位置に作製された1以上のトランジスタを含む選択回路と、を含み、
前記選択回路の前記トランジスタの各々は、制御信号によって該トランジスタが導電状態にあるときに、前記導体のうちの対応するものに電気的に接続され、かつそれぞれが半導体材料又は導電性材料から形成された、第1のドレイン領域又はソース領域、第2のドレイン領域又はソース領域、及びゲート領域を含み、
前記メモリ構造体の前記第1の導体層が、2以上の段差を有する階段構造体中に設けられ、
前記第1の導体層が、それぞれ前記段差のうちの1つの上に設けられ、
前記メモリセルが、各々が複数のNORメモリストリングを有する複数のレベルをなすように構成され、
前記第1の導体層の前記導体が、前記NORメモリストリングの共通ビット線を形成し、
前記階段構造体の各段差が、前記NORメモリストリングの対応するレベルの前記共通ビット線を含み、
前記階段構造体の前記段差の各々において前記共通ビット線に接続された、前記選択回路の前記トランジスタが、前記共通ビット線のためのビット線セレクタを形成し、
各ビット線セレクタの前記トランジスタが、第1の群及び第2の群を形成し、
前記ビット線セレクタによって選択された互いに隣接するビット線が、前記トランジスタの前記第1の群と、前記トランジスタの前記第2の群とによって提供され、
前記トランジスタの前記第1の群へのコンタクトが、前記トランジスタの前記第2の群へのコンタクトに対して、互い違いに配置されたメモリ回路。 - 請求項1に記載のメモリ回路であって、
前記第1のドレイン領域又はソース領域、及び前記第2のドレイン領域又はソース領域のいずれか一方が、金属ケイ化物層に隣接して形成され、
前記選択回路の各トランジスタが、前記第1の導体層の前記導体のうちの前記対応するものを、前記メモリ動作用回路に選択的に接続するメモリ回路。 - 請求項2に記載のメモリ回路であって、
前記金属ケイ化物層が、ケイ化チタン又はケイ化ニッケルを含むメモリ回路。 - 請求項1に記載のメモリ回路であって、
複数の導体を有する相互接続層を更に含み、
前記相互接続層の前記導体の各々が前記選択回路の1以上の前記トランジスタに電気的に接続されることにより、前記選択回路の前記トランジスタが導電状態にあるときに、前記相互接続層の該導体が、前記メモリ構造体の前記導体のうちの該トランジスタに対応するものに電気的に接続されるメモリ回路。 - 請求項1に記載のメモリ回路であって、
前記メモリアレイ内に、複数の導体を有する第2の導体層を更に含み、
前記選択回路の前記トランジスタの前記第1のドレイン領域又はソース領域の各々が、前記第2の導体層の前記導体のうちの対応するものに接続され、
前記選択回路の前記トランジスタの前記第2のドレイン領域又はソース領域の各々が、前記第1の導体層の前記導体のうちの対応するものに接続されたメモリ回路。 - 請求項1に記載のメモリ回路であって、
前記階段構造体の各々が、前記メモリ構造体の、前記メモリセルの前記アレイから分離された部分に設けられたメモリ回路。 - 請求項1に記載のメモリ回路であって、
前記第1の導体層上に形成され、かつ、導電状態にあるときに、前記第1の導体層の前記導体を電気的に接続する、前記選択回路の前記トランジスタが、2つの列に配列され、
各列の前記トランジスタが、前記平坦な表面に対して実質的に平行をなし、かつ前記第1の方向に対して実質的に垂直をなす第2の方向に沿って延在したメモリ回路。 - 請求項1に記載のメモリ回路であって、
相互接続線のセットを更に含み、
前記選択回路の各トランジスタの前記ゲート領域の端子が、前記相互接続線のうちの1つに接続されたメモリ回路。 - 請求項1に記載のメモリ回路であって、
前記選択回路の1つの前記トランジスタのチャネル領域に電流が存在する場合に、前記電流が、前記平坦な表面に対して実質的に垂直をなす方向に流れるメモリ回路。 - 請求項1に記載のメモリ回路であって、
前記半導体材料が、多結晶シリコン、多結晶シリコンゲルマニウム、単結晶シリコン、及び単結晶シリコンゲルマニウムのうちの1つ又は複数を含むメモリ回路。 - 請求項1に記載のメモリ回路であって、
相互接続線のセットを更に含み、
前記選択回路の前記トランジスタの各々の前記第1のドレイン領域又はソース領域が、前記相互接続線のうちの1つに接続されたメモリ回路。
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| US201962804080P | 2019-02-11 | 2019-02-11 | |
| US62/804,080 | 2019-02-11 | ||
| US201962947405P | 2019-12-12 | 2019-12-12 | |
| US62/947,405 | 2019-12-12 | ||
| PCT/US2020/017494 WO2020167658A1 (en) | 2019-02-11 | 2020-02-10 | Vertical thin-film transistor and application as bit-line connector for 3-dimensional memory arrays |
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| JP2022519537A JP2022519537A (ja) | 2022-03-24 |
| JP7655853B2 true JP7655853B2 (ja) | 2025-04-02 |
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| EP (1) | EP3925004A4 (ja) |
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| US11398492B2 (en) | 2022-07-26 |
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| US11910612B2 (en) | 2024-02-20 |
| WO2020167658A1 (en) | 2020-08-20 |
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