KR100738116B1 - 가변 저항 물질을 포함하는 비휘발성 메모리 소자 - Google Patents
가변 저항 물질을 포함하는 비휘발성 메모리 소자 Download PDFInfo
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- KR100738116B1 KR100738116B1 KR1020060063502A KR20060063502A KR100738116B1 KR 100738116 B1 KR100738116 B1 KR 100738116B1 KR 1020060063502 A KR1020060063502 A KR 1020060063502A KR 20060063502 A KR20060063502 A KR 20060063502A KR 100738116 B1 KR100738116 B1 KR 100738116B1
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- variable resistance
- resistance material
- buffer layer
- lower electrode
- memory device
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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 without a potential-jump barrier or surface barrier, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/20—Multistable switching devices, e.g. memristors
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/56—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
- G11C11/5685—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency using storage elements comprising metal oxide memory material, e.g. perovskites
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/0002—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using resistive RAM [RRAM] elements
- G11C13/0007—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using resistive RAM [RRAM] elements comprising metal oxide memory material, e.g. perovskites
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/0002—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using resistive RAM [RRAM] elements
- G11C13/0021—Auxiliary circuits
- G11C13/003—Cell access
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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 without a potential-jump barrier or surface barrier, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/011—Manufacture or treatment of multistable switching devices
- H10N70/061—Patterning of the switching material
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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 without a potential-jump barrier or surface barrier, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/801—Constructional details of multistable switching 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 without a potential-jump barrier or surface barrier, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/801—Constructional details of multistable switching devices
- H10N70/821—Device geometry
- H10N70/826—Device geometry adapted for essentially vertical current flow, e.g. sandwich or pillar 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 without a potential-jump barrier or surface barrier, 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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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2213/00—Indexing scheme relating to G11C13/00 for features not covered by this group
- G11C2213/30—Resistive cell, memory material aspects
- G11C2213/32—Material having simple binary metal oxide structure
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2213/00—Indexing scheme relating to G11C13/00 for features not covered by this group
- G11C2213/50—Resistive cell structure aspects
- G11C2213/56—Structure including two electrodes, a memory active layer and a so called passive or source or reservoir layer which is NOT an electrode, wherein the passive or source or reservoir layer is a source of ions which migrate afterwards in the memory active layer to be only trapped there, to form conductive filaments there or to react with the material of the memory active layer in redox way
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2213/00—Indexing scheme relating to G11C13/00 for features not covered by this group
- G11C2213/70—Resistive array aspects
- G11C2213/76—Array using an access device for each cell which being not a transistor and not a diode
Abstract
Description
Claims (9)
- 가변 저항 물질을 포함하는 비휘발성 메모리 소자에 있어서,하부 전극;상기 하부 전극 상에 형성되며, 상기 하부 전극과의 계면에 쇼트키 장벽을 형성하는 버퍼층;상기 버퍼층 상에 형성되며 가변 저항 특성을 지닌 가변 저항물질층; 및상기 가변 저항물질층 상에 형성된 상부 전극;을 포함하는 것을 특징으로 하는 가변 저항 물질을 포함하는 비휘발성 메모리 소자.
- 제 1항에 있어서,상기 버퍼층 및 상기 가변 저항물질층은 p형 산화물로 형성된 것을 특징으로 하는 가변 저항 물질을 포함하는 비휘발성 메모리 소자.
- 제 1항에 있어서,상기 가변 저항물질층은 Ni 산화물로 형성된 것을 특징으로 하는 가변 저항 물질을 포함하는 비휘발성 메모리 소자.
- 제 1항에 있어서,상기 버퍼층은 문턱 스위칭 특성을 지닌 Ni 산화물 또는 Cu 산화물로 형성된 것을 특징으로 하는 가변 저항 물질을 포함하는 비휘발성 메모리 소자.
- 제 1항에 있어서,상기 하부 전극 및 상기 버퍼층 사이에 형성된 쇼트키 장벽의 높이는 0.3 내지 1 eV인 것을 특징으로 하는 가변 저항 물질을 포함하는 비휘발성 메모리 소자.
- 제 5항에 있어서,상기 버퍼층은 Cu 산화물이며, 상기 하부 전극은 TiNx, Co 또는 W 중 어느 하나인 것을 특징으로 하는 가변 저항 물질을 포함하는 비휘발성 메모리 소자.
- 제 5항에 있어서,상기 버퍼층은 Ni 산화물이며, 상기 하부 전극은 Ti, Ta, TaN 또는 TiN 중 어느 하나인 것을 특징으로 하는 가변 저항 물질을 포함하는 비휘발성 메모리 소자.
- 제 1항에 있어서,상기 가변 저항물질층 및 상기 상부 전극 사이에 오믹 콘택이 형성된 것을 특징으로 하는 가변 저항 물질을 포함하는 비휘발성 메모리 소자.
- 제 8항에 있어서,상기 상부 전극의 일함수는 상기 가변 저항물질층의 일함수보다 큰 것을 특징으로 하는 가변 저항 물질을 포함하는 비휘발성 메모리 소자.
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KR1020060063502A KR100738116B1 (ko) | 2006-07-06 | 2006-07-06 | 가변 저항 물질을 포함하는 비휘발성 메모리 소자 |
CN200710091903.5A CN101101964B (zh) | 2006-07-06 | 2007-03-30 | 包括可变电阻材料的非易失存储器件 |
JP2007178654A JP5213370B2 (ja) | 2006-07-06 | 2007-07-06 | 可変抵抗物質を含む不揮発性メモリ素子 |
US11/822,446 US8796819B2 (en) | 2006-07-06 | 2007-07-06 | Non-volatile memory device including a variable resistance material |
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KR1020060063502A KR100738116B1 (ko) | 2006-07-06 | 2006-07-06 | 가변 저항 물질을 포함하는 비휘발성 메모리 소자 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101145373B1 (ko) | 2010-07-06 | 2012-05-15 | 에스케이하이닉스 주식회사 | 저항성 메모리 장치 및 그 제조방법 |
KR101257365B1 (ko) * | 2011-07-22 | 2013-04-23 | 에스케이하이닉스 주식회사 | 문턱 스위칭 동작을 가지는 저항 변화 메모리 및 이의 제조방법 |
KR101485024B1 (ko) | 2011-01-03 | 2015-01-22 | 서울대학교산학협력단 | 저항 변화 메모리 소자 |
KR20170029674A (ko) | 2015-09-07 | 2017-03-16 | 한양대학교 산학협력단 | 저항변화 메모리 소자 및 그 제조방법 |
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JP5213370B2 (ja) | 2013-06-19 |
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US20080006907A1 (en) | 2008-01-10 |
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