JP5047518B2 - 抵抗メモリセル、及びこれを利用した抵抗メモリ配列 - Google Patents
抵抗メモリセル、及びこれを利用した抵抗メモリ配列 Download PDFInfo
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- 125000006850 spacer group Chemical group 0.000 claims description 17
- 229910052759 nickel Inorganic materials 0.000 claims description 11
- 229910052719 titanium Inorganic materials 0.000 claims description 10
- 229910052735 hafnium Inorganic materials 0.000 claims description 9
- 229910052726 zirconium Inorganic materials 0.000 claims description 9
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 239000010409 thin film Substances 0.000 description 73
- 239000010408 film Substances 0.000 description 67
- 238000000034 method Methods 0.000 description 57
- 230000008569 process Effects 0.000 description 33
- 229910000314 transition metal oxide Inorganic materials 0.000 description 21
- 229910052751 metal Inorganic materials 0.000 description 17
- 239000002184 metal Substances 0.000 description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 16
- 239000012535 impurity Substances 0.000 description 16
- 239000001301 oxygen Substances 0.000 description 16
- 229910052760 oxygen Inorganic materials 0.000 description 16
- 239000000758 substrate Substances 0.000 description 15
- 239000004020 conductor Substances 0.000 description 14
- 229910000480 nickel oxide Inorganic materials 0.000 description 13
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 13
- 238000009826 distribution Methods 0.000 description 12
- 238000000059 patterning Methods 0.000 description 11
- 125000004430 oxygen atom Chemical group O* 0.000 description 10
- 229910052723 transition metal Inorganic materials 0.000 description 10
- 150000003624 transition metals Chemical class 0.000 description 10
- 229910052741 iridium Inorganic materials 0.000 description 7
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000009832 plasma treatment Methods 0.000 description 6
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 6
- 238000000151 deposition Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000010354 integration Effects 0.000 description 5
- 238000002955 isolation Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000000994 depressogenic effect Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000005546 reactive sputtering Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000005137 deposition process Methods 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000000231 atomic layer deposition Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000003870 refractory metal Substances 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
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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
- H10N70/20—Multistable switching devices, e.g. memristors
-
- 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
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
-
- 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
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
- G11C11/161—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect details concerning the memory cell structure, e.g. the layers of the ferromagnetic memory cell
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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
- H10B63/30—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having three or more electrodes, e.g. transistors
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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
- H10B63/80—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
- H10B63/82—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 the switching components having a common active material layer
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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
- H10B63/80—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
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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
- H10N70/821—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 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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- 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
- H10N70/8836—Complex metal oxides, e.g. perovskites, spinels
-
- 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
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
- G11C11/165—Auxiliary circuits
- G11C11/1659—Cell access
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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
-
- 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
- G11C2213/52—Structure characterized by the electrode material, shape, etc.
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Description
抵抗メモリ配列に関する。
本発明は抵抗メモリセルに係り、本発明に対するより明確な理解のために本発明が提供する抵抗メモリセル動作特性に対してまず説明する。
図4Aは本発明の一実施形態による抵抗メモリセル100を概略的に示す斜視図であり、図4Bは図4AのI−I線に沿って切断した際の抵抗メモリセルを概略的に示す断面図であり、図4Cは図4AのII−II線に沿って切断した際の抵抗メモリセルを概略的に示す断面図である。
図4A乃至図4C、図6乃至図9に示した様々な種類の単位抵抗メモリセルが二次元的に配置されて抵抗メモリセル配列を形成する。
111 第1電極
112 コンタクトホール
113 抵抗メモリ要素薄膜
113S スイッチング領域
115 第2電極
Claims (8)
- 垂直に延長する第1電極プラグと、
水平的に配置されて前記第1電極プラグの上部面を覆い、前記第1電極プラグを覆う部分の最小幅が前記第1電極プラグの直径より大きい抵抗メモリ要素パターンと、
前記抵抗メモリ要素パターン上に配置される第2電極と、を含み、
前記抵抗メモリ要素パターンは、MOxで表示され、ここにMはNi、Nb、Ti、Zr、Hf、Co、Fe、Cu、Zn、またはCrであり、MがNi、Co、ZnまたはCuである時、xは0.5乃至0.99の範囲を有し、MがHf、Zr、TiまたはCrである時、xは1.0乃至1.98範囲を有し、MがFeである時、xは0.75乃至1.485の範囲を有し、MがNbである時、xは1.25乃至2.475の範囲を有することを特徴とする抵抗メモリセル。 - 前記第1電極プラグの直径は前記第2電極の最小幅より小さいことを特徴とする請求項1に記載の抵抗メモリセル。
- 前記第1電極プラグと前記抵抗メモリ要素パターンの重畳による面積は前記第2電極と前記抵抗メモリ要素パターンの重畳による面積より小さいことを特徴とする請求項1または2に記載の抵抗メモリセル。
- 前記第2電極の最小幅は前記抵抗メモリ要素パターンの最小幅より広いことを特徴とする請求項1または2に記載の抵抗メモリセル。
- 前記第1電極プラグは絶縁膜に形成されたコンタクトホール内に位置し、
前記コンタクトホールと前記第1電極プラグとの間に絶縁性スペーサが位置することを特徴とする請求項1または2に記載の抵抗メモリセル。 - 前記第1電極プラグは前記コンタクトホールの一部を満たし、
前記抵抗メモリ要素パターンは前記コンタクトホールの残りの部分を満たすことを特徴とする請求項5に記載の抵抗メモリセル。 - 互いに平行する複数個の第1電極ラインと、
前記第1電極ラインと直交して互いに平行する複数個の第2電極ラインと、
互いに向き合う前記第1電極ライン及び前記第2電極ラインの面のうちのいずれか一つの電極ラインの面に各々配置された抵抗メモリ要素パターンと、
前記第1電極ラインと第2電極ラインとが交差する部分で前記第1電極ラインまたは前記第2電極ラインのうちのいずれか一つと前記抵抗メモリ要素パターンを連結する複数個の電極プラグと、を含み、
前記抵抗メモリ要素パターンは、MOxで表示され、ここにMはNi、Nb、Ti、Zr、Hf、Co、Fe、Cu、Zn、またはCrであり、MがNi、Co、ZnまたはCuである時、xは0.5乃至0.99の範囲を有し、MがHf、Zr、TiまたはCrである時、xは1.0乃至1.98範囲を有し、MがFeである時、xは0.75乃至1.485の範囲を有し、MがNbである時、xは1.25乃至2.475の範囲を有することを特徴とする抵抗メモリ配列。 - 絶縁膜によって絶縁されて、積層され、隣接する層の間で互いに交差するように配置される互いに平行する複数個の電極ラインと、
前記各層の電極ラインと絶縁膜との間に配置された抵抗メモリ要素パターンと、
前記交差する電極ラインの交点部分の絶縁膜を貫通して隣接する層の電極ライン及び抵抗メモリ要素パターンを連結させる複数個の電極プラグと、を含み、
前記抵抗メモリ要素パターンは、MOxで表示され、ここにMはNi、Nb、Ti、Zr、Hf、Co、Fe、Cu、Zn、またはCrであり、MがNi、Co、ZnまたはCuである時、xは0.5乃至0.99の範囲を有し、MがHf、Zr、TiまたはCrである時、xは1.0乃至1.98範囲を有し、MがFeである時、xは0.75乃至1.485の範囲を有し、MがNbである時、xは1.25乃至2.475の範囲を有することを特徴とする多層抵抗メモリ配列。
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KR1020050025561A KR100697282B1 (ko) | 2005-03-28 | 2005-03-28 | 저항 메모리 셀, 그 형성 방법 및 이를 이용한 저항 메모리배열 |
KR10-2005-0025561 | 2005-03-28 |
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JP2006279042A JP2006279042A (ja) | 2006-10-12 |
JP2006279042A5 JP2006279042A5 (ja) | 2009-01-15 |
JP5047518B2 true JP5047518B2 (ja) | 2012-10-10 |
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KR (1) | KR100697282B1 (ja) |
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US8270193B2 (en) | 2010-01-29 | 2012-09-18 | Unity Semiconductor Corporation | Local bit lines and methods of selecting the same to access memory elements in cross-point arrays |
US8937292B2 (en) | 2011-08-15 | 2015-01-20 | Unity Semiconductor Corporation | Vertical cross point arrays for ultra high density memory applications |
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KR100723872B1 (ko) * | 2005-06-30 | 2007-05-31 | 한국전자통신연구원 | 급격한 금속-절연체 전이를 이용한 메모리소자 및 그동작방법 |
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