JP6159023B2 - 選択デバイスを備える三次元メモリアレイ - Google Patents
選択デバイスを備える三次元メモリアレイ Download PDFInfo
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- H10B—ELECTRONIC MEMORY DEVICES
- H10B63/00—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices
- H10B63/80—Arrangements comprising multiple bistable or multi-stable switching components of the same type on a plane parallel to the substrate, e.g. cross-point arrays
- H10B63/84—Arrangements comprising multiple bistable or multi-stable switching components of the same type on a plane parallel to the substrate, e.g. cross-point arrays arranged in a direction perpendicular to the substrate, e.g. 3D cell arrays
- H10B63/845—Arrangements comprising multiple bistable or multi-stable switching components of the same type on a plane parallel to the substrate, e.g. cross-point arrays arranged in a direction perpendicular to the substrate, e.g. 3D cell arrays the switching components being connected to a common vertical conductor
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- H10B—ELECTRONIC MEMORY DEVICES
- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/20—EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B63/00—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices
- H10B63/20—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having two electrodes, e.g. diodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B63/00—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices
- H10B63/20—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having two electrodes, e.g. diodes
- H10B63/22—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having two electrodes, e.g. diodes of the metal-insulator-metal type
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B63/00—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices
- H10B63/20—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having two electrodes, e.g. diodes
- H10B63/24—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having two electrodes, e.g. diodes of the Ovonic threshold switching type
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- H—ELECTRICITY
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- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/20—Multistable switching devices, e.g. memristors
- H10N70/231—Multistable switching devices, e.g. memristors based on solid-state phase change, e.g. between amorphous and crystalline phases, Ovshinsky effect
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- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/20—Multistable switching devices, e.g. memristors
- H10N70/24—Multistable switching devices, e.g. memristors based on migration or redistribution of ionic species, e.g. anions, vacancies
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- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/20—Multistable switching devices, e.g. memristors
- H10N70/24—Multistable switching devices, e.g. memristors based on migration or redistribution of ionic species, e.g. anions, vacancies
- H10N70/245—Multistable switching devices, e.g. memristors based on migration or redistribution of ionic species, e.g. anions, vacancies the species being metal cations, e.g. programmable metallization cells
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- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/801—Constructional details of multistable switching devices
- H10N70/821—Device geometry
- H10N70/823—Device geometry adapted for essentially horizontal current flow, e.g. bridge type devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/801—Constructional details of multistable switching devices
- H10N70/881—Switching materials
- H10N70/882—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
- H10N70/8825—Selenides, e.g. GeSe
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- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/801—Constructional details of multistable switching devices
- H10N70/881—Switching materials
- H10N70/882—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
- H10N70/8828—Tellurides, e.g. GeSbTe
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N70/00—Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/801—Constructional details of multistable switching devices
- H10N70/881—Switching materials
- H10N70/883—Oxides or nitrides
- H10N70/8833—Binary metal oxides, e.g. TaOx
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Description
Claims (12)
- 基板に沿って延在する複数の第1の導線を含むスタックであって、前記複数の第1の導線が絶縁材によって互いに分離されて積層されているスタックと、
前記スタック上に前記複数の第1の導線に直交する方向に沿って延在する少なくとも1つの第2の導線であって、前記スタック側の第1の底面、前記スタック側とは反対側の表面、ならびに前記第1の底面と前記表面とをつなぐ第1の側面を有する少なくとも1つの第2の導線と、
前記少なくとも1つの第2の導線の前記第1の底面の一部から前記第1の底面の幅よりも小さい幅を持って前記基板に対して垂直下方に伸びることにより前記複数の第1の導線のそれぞれと交差するように設けられた少なくとも1つの導電性延長部であって、前記基板側の第2の底面、並びに前記第2の底面と前記少なくとも1つの第2の導線の前記第1の底面とをつなぐ第2の側面を有する少なくとも1つの導電性延長部と、
前記少なくとも1つの第2の導線の前記第1の側面および前記第1の底面ならびに前記少なくとも1つの導電性延長部の前記第2の側面および前記第2の底面に沿って連続的に形成された記憶素子材料と、
それぞれが前記記憶素子材料と前記複数の第1の導線の対応する第1の導線との間に配置された複数の選択デバイスと、
を含むメモリアレイ。 - 前記選択デバイスは、内側同心導体材料と前記内側同心導体材料を囲むように配置された外側同心非金属材料とを含む、請求項1に記載のメモリアレイ。
- 前記外側同心非金属材料は、半導体材料と絶縁体材料が交互になった層状スタックを含む、請求項2に記載のメモリアレイ。
- 前記選択デバイスは、
金属‐絶縁体‐金属選択デバイス、
金属‐半導体‐金属選択デバイス、及び、
オボニック閾値スイッチ、
の1つである、請求項1〜3のいずれかに記載のメモリアレイ。 - 前記第2の導線の前記第1の底面及び前記第1の側面ならびに前記導電性延長部の第2の底面及び前記第2の側面に沿って配置されたバッファ材料であって、その一部が前記導電性延長部と前記記憶素子材料との間に位置するバッファ材料をさらに含む、請求項1〜4のいずれかに記載のメモリアレイ。
- 前記記憶素子材料は、前記複数の第1の導線を分ける前記絶縁材に半径方向に隣接し、
前記選択デバイスを含む複数の材料が、前記記憶素子材料を囲むように環状に配置され、かつ、前記複数の第1の導線のそれぞれに半径方向に隣接し、
前記内側同心導体材料を囲むように配置された前記外側同心非金属材料は、前記内側同心導体材料の少なくとも第1表面と第2表面とに配置される、請求項2記載のメモリアレイ。 - メモリアレイを形成する方法であって、
基板に沿って延在する複数の第1の導線を含むスタックであって、前記複数の第1の導線が絶縁材によって互いに分離されて積層されているスタックを形成することと、
前記スタックを前記基板に対して垂直方向に通るビアであって、その少なくとも一部が、前記複数の第1の導線のそれぞれの中を通るビアを形成することと、
前記ビアに隣接する前記複数の第1の導線の少なくとも1つに凹部を形成することと、
前記凹部に選択デバイスを形成することと、
前記スタック上に隔離材料層を形成することと、
前記隔離材料層に前記複数の第1の導線と直交する方向に延在する溝を形成することであって、その一部で前記ビアと連結する溝を形成することと、
前記溝の内壁と前記ビアの内壁に沿って記憶素子材料を形成することと、
前記記憶素子材料を介して前記ビア及び前記溝を埋めるように導電性材料を形成することと、
前記隔離材料層が露出するまで前記導電性材料の一部を研磨することによって、前記ビア内に残した前記導電性材料を含む導電性延長部と、前記溝内に残した前記導電性材料を含む第2の導線とを一体として形成することと、
を含む方法。 - 前記導電性材料を形成する前に、前記ビア内及び前記溝内に前記記憶素子材料を覆うようにしてバッファ材料を形成することをさらに含む、請求項7に記載の方法。
- 前記凹部に選択デバイスを形成することは、
前記凹部に非金属材料を形成することと、
前記凹部に導体材料を形成することと、
を含む、請求項7又は8に記載の方法。 - 前記凹部に選択デバイスを形成することは、
最初に、前記凹部に前記非金属材料を形成することと、
次に、前記凹部に前記導体材料を形成することと、
を含む、請求項9に記載の方法 - 前記凹部に前記非金属材料を形成することは、
前記凹部に半導体材料を成膜させることと、
前記凹部の前記半導体材料の一部のみを取り除いて第2の凹部を形成することと、
を含む、請求項9に記載の方法。 - 前記凹部を形成することは、前記ビアの壁の前記第1の導線のぞれぞれの露出された領域に、前記絶縁材よりも前記第1の導線に選択的な無方向性エッチングによって、前記凹部を形成することを含み、
前記凹部に前記導体材料を形成することは、
前記凹部内に前記導体材料を成膜させることと、
前記凹部内でない箇所の前記導体材料を取り除くことと、
を含む、請求項9に記載の方法。
Applications Claiming Priority (3)
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US13/915,302 US9728584B2 (en) | 2013-06-11 | 2013-06-11 | Three dimensional memory array with select device |
US13/915,302 | 2013-06-11 | ||
PCT/US2014/041042 WO2014200791A1 (en) | 2013-06-11 | 2014-06-05 | Three dimensional memory array with select device |
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JP2016527710A JP2016527710A (ja) | 2016-09-08 |
JP6159023B2 true JP6159023B2 (ja) | 2017-07-05 |
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US (3) | US9728584B2 (ja) |
EP (1) | EP3008754B1 (ja) |
JP (1) | JP6159023B2 (ja) |
KR (2) | KR20160018761A (ja) |
CN (1) | CN105359271B (ja) |
TW (1) | TWI536546B (ja) |
WO (1) | WO2014200791A1 (ja) |
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US9728584B2 (en) | 2017-08-08 |
KR20180001578A (ko) | 2018-01-04 |
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JP2016527710A (ja) | 2016-09-08 |
CN105359271B (zh) | 2018-03-30 |
US20140361239A1 (en) | 2014-12-11 |
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