JP7265552B2 - トランジスタ、およびメモリ・セルの高さ方向に延びるストリングのアレイ - Google Patents
トランジスタ、およびメモリ・セルの高さ方向に延びるストリングのアレイ Download PDFInfo
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- JP7265552B2 JP7265552B2 JP2020536234A JP2020536234A JP7265552B2 JP 7265552 B2 JP7265552 B2 JP 7265552B2 JP 2020536234 A JP2020536234 A JP 2020536234A JP 2020536234 A JP2020536234 A JP 2020536234A JP 7265552 B2 JP7265552 B2 JP 7265552B2
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- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Non-Volatile Memory (AREA)
- Semiconductor Memories (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Recrystallisation Techniques (AREA)
- Formation Of Insulating Films (AREA)
- Thin Film Transistor (AREA)
Description
いくつかの実施形態では、トランジスタは、対向した第1および第2の側を有するチャネル材料を含む。ゲートは、チャネル材料の第1の側にあり、ゲート絶縁体は、ゲートとチャネル材料との間にある。第1の絶縁性材料は、対向した第1および第2の側を有し、第1の側が、チャネル材料の第2の側に隣接している。第1の絶縁性材料の組成物とは異なる組成物の第2の絶縁性材料は、第1の絶縁性材料の第2の側に隣接している。第2の絶縁性材料は、(a)、(b)、および(c)のうちの少なくとも1つを有し、ただし、(a):第1の材料よりも低い酸素拡散率、(b):正味の正電荷、および(c):第1の材料よりも少なくとも2倍大きい剪断強度である。いくつかの実施形態では、メモリ・セルの高さ方向に延びるストリングのアレイは、そのようなトランジスタを備える。
Claims (15)
- 対向した第1および第2の側を有するチャネル材料と、
前記チャネル材料の前記第1の側に隣接したゲートであって、ゲート絶縁体が前記ゲートと前記チャネル材料との間にある、ゲートと、
対向した第1および第2の側を有する第1の絶縁性材料であって、前記第1の側が前記チャネル材料の前記第2の側に隣接し、前記第1の絶縁性材料はチューブを含む、第1の絶縁性材料と、
前記第1の絶縁性材料の組成物とは異なる組成物の第2の絶縁性材料であって、前記第2の絶縁性材料は前記第1の絶縁性材料の前記第2の側に隣接し、前記第2の絶縁性材料は、Al2O3、HfN、HfOxNy(xおよびyはそれぞれ0よりも大きい)、HfYxOy(xおよびyはそれぞれ0よりも大きい)、BN、AlN、SiC、ダイヤモンド、SixNyHz(x、y、およびzはそれぞれ0よりも大きい)、HfxNyHz(x、y、およびzはそれぞれ0よりも大きい)、HfOxNyHz(x、y、およびzはそれぞれ0よりも大きい)、HfYxOyHz(x、y、およびzはそれぞれ0よりも大きい)、BNxHy(xおよびyはそれぞれ0よりも大きい)、およびAlNxHy(xおよびyはそれぞれ0よりも大きい)のうちの少なくとも1つからなり、かつ、前記第1の絶縁性材料のチューブの半径方向内側のチューブを含み、前記第2の絶縁性材料は下記(a)、(b)、および(c)のうちの少なくとも1つを有する、第2の絶縁性材料と、
を備えるトランジスタであって、
(a):前記第1の絶縁性材料よりも低い酸素拡散率、
(b):正味の正電荷、
(c):前記第1の絶縁性材料よりも少なくとも2倍大きい剪断強度
である、トランジスタ。 - 前記第1の絶縁性材料は、前記チャネル材料の前記第2の側に直に接している、請求項1に記載のトランジスタ。
- 前記第2の絶縁性材料は、前記第1の絶縁性材料の前記第2の側に直に接している、請求項1に記載のトランジスタ。
- 前記第2の絶縁性材料は、(a):前記第1の絶縁性材料よりも低い酸素拡散率を有する、請求項1に記載のトランジスタ。
- 前記第2の絶縁性材料は、(b):正味の正電荷を有する、請求項1に記載のトランジスタ。
- 前記第2の絶縁性材料は、(c):前記第1の絶縁性材料よりも少なくとも2倍大きい剪断強度を有する、請求項1に記載のトランジスタ。
- 前記第2の絶縁性材料は、前記(a)、(b)、および(c)のうちの1つのみを有する、請求項1に記載のトランジスタ。
- 前記第2の絶縁性材料は、前記(a)、(b)、および(c)のうちの2つのみを有する、請求項1に記載のトランジスタ。
- 前記第2の絶縁性材料は、前記(a)、(b)、および(c)の3つ全部を有する、請求項1に記載のトランジスタ。
- 垂直方向に伸長する第1のチューブとして構成された、対向した第1および第2の側を有するチャネル材料と、
前記チャネル材料の前記第1の側に隣接したゲートであって、ゲート絶縁体および電荷貯蔵材料が前記ゲートと前記チャネル材料との間にあり、前記ゲート絶縁体および前記電荷貯蔵材料は、前記垂直方向に伸長する第1のチューブの外側に、垂直方向に伸長する第2のチューブとして構成される、ゲートと、
対向した第1および第2の側を有する第1の絶縁性材料であって、前記第1の側が前記チャネル材料の前記第2の側に隣接し、SixOy(xおよびyはそれぞれ0よりも大きい)、SixOyNz(x、y、およびzはそれぞれ0よりも大きい)、Al3O4、ZrO2、HfO2、Pr2O3、およびTa2O5のうちの少なくとも1つを含む、第1の絶縁性材料と、
前記第1の絶縁性材料の組成物とは異なる組成物の第2の絶縁性材料であって、前記第1の絶縁性材料の前記第2の側に隣接し、SixNyHz(x、y、およびzはそれぞれ0よりも大きい)、HfxNyHz(x、y、およびzはそれぞれ0よりも大きい)、HfOxNyHz(x、y、およびzはそれぞれ0よりも大きい)、HfYxOyHz(x、y、およびzはそれぞれ0よりも大きい)、BNxHy(xおよびyはそれぞれ0よりも大きい)、およびAlNxHy(xおよびyはそれぞれ0よりも大きい)のうちの少なくとも1つを含む、第2の絶縁性材料と、
を備えるトランジスタ。 - 前記第1の絶縁性材料の前記第1の側は、前記チャネル材料の前記第2の側に直に接しており、SixOy、SixOyNz、Al3O4、ZrO2、HfO2、Pr2O3、およびTa2O5のうちの前記少なくとも1つは、前記チャネル材料の前記第2の側に直に接している、請求項10に記載のトランジスタ。
- 前記第1の絶縁性材料は、SixOy、SixOyNz、Al3O4、ZrO2、HfO2、Pr2O3、およびTa2O5のうちの前記少なくとも1つから本質的になる、請求項11に記載のトランジスタ。
- 前記第2の絶縁性材料は、前記第1の絶縁性材料の前記第2の側に直に接しており、SixNyHz、HfxNyHz、HfOxNyHz、HfYxOyHz、BNxHy、およびAlNxHyのうちの前記少なくとも1つは、前記第1の絶縁性材料のSixOy、SixOyNz、Al3O4、ZrO2、HfO2、Pr2O3、およびTa2O5のうちの前記少なくとも1つに直に接している、請求項10に記載のトランジスタ。
- メモリ・セルの高さ方向に延びるストリングのアレイであって、
交互する絶縁階層とワード線階層との垂直スタックであって、前記ワード線階層は、個々のメモリ・セルの制御ゲート領域に対応する端子端部を有する、垂直スタックと、
個々の前記制御ゲート領域に沿って高さ方向に延びる前記個々のメモリ・セルの電荷ブロック領域と、
前記電荷ブロック領域の個々に沿って高さ方向に延びる前記個々のメモリ・セルの電荷貯蔵材料と、
前記垂直スタックに沿って高さ方向に延び、側面内側を有するチャネル材料と、
前記チャネル材料と前記電荷貯蔵材料との間で横方向にある絶縁の電荷通過材料と、
対向した第1および第2の側を有する第1の絶縁性材料であって、前記第1の側が前記チャネル材料の前記側面内側に隣接し、前記第1の絶縁性材料はチューブを含む、第1の絶縁性材料と、
前記第1の絶縁性材料の組成物とは異なる組成物の第2の絶縁性材料であって、前記第2の絶縁性材料は前記第1の絶縁性材料の前記第2の側に隣接し、前記第2の絶縁性材料は、前記第1の絶縁性材料のチューブの半径方向内側のチューブを含み、かつ、下記(a)、(b)、および(c)のうちの少なくとも1つを有する、第2の絶縁性材料と、
を備え、
(a):前記第1の絶縁性材料よりも低い酸素拡散率、
(b):正味の正電荷、
(c):前記第1の絶縁性材料よりも少なくとも2倍大きい剪断強度
である、アレイ。 - メモリ・セルの高さ方向に延びるストリングのアレイであって、
交互する絶縁階層とワード線階層との垂直スタックであって、前記ワード線階層は、個々のメモリ・セルの制御ゲート領域に対応する端子端部を有する、垂直スタックと、
個々の前記制御ゲート領域に沿って、および、前記絶縁階層に沿って、高さ方向に延びる前記個々のメモリ・セルの電荷ブロック領域であって、第1のチューブとして構成された電荷ブロック領域と、
前記電荷ブロック領域の個々に沿って高さ方向に延びる前記個々のメモリ・セルの電荷貯蔵材料であって、前記第1のチューブ内に第2のチューブとして構成された電荷貯蔵材料と、
前記垂直スタックに沿って高さ方向に延びるチャネル材料であって、前記第2のチューブ内に第3のチューブとして構成され、且つ、側面内側を有するチャネル材料と、
前記チャネル材料と前記電荷貯蔵材料との間で横方向にある絶縁の電荷通過材料と、
対向した第1および第2の側を有する第1の絶縁性材料であって、前記第1の側が前記チャネル材料の前記側面内側に隣接し、SixOy(xおよびyはそれぞれ0よりも大きい)、SixOyNz(x、y、およびzはそれぞれ0よりも大きい)、Al3O4、ZrO2、HfO2、Pr2O3、およびTa2O5のうちの少なくとも1つを含む、第1の絶縁性材料と、
前記第1の絶縁性材料の組成物とは異なる組成物の第2の絶縁性材料であって、前記第2の絶縁性材料は前記第1の絶縁性材料の前記第2の側に隣接し、前記第2の絶縁性材料は、SixNyHz(x、y、およびzはそれぞれ0よりも大きい)、HfxNyHz(x、y、およびzはそれぞれ0よりも大きい)、HfOxNyHz(x、y、およびzはそれぞれ0よりも大きい)、HfYxOyHz(x、y、およびzはそれぞれ0よりも大きい)、BNxHy(xおよびyはそれぞれ0よりも大きい)、およびAlNxHy(xおよびyはそれぞれ0よりも大きい)のうちの少なくとも1つを含む、第2の絶縁性材料と、
を備える、アレイ。
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