JP5007724B2 - 抵抗変化型素子 - Google Patents
抵抗変化型素子 Download PDFInfo
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- JP5007724B2 JP5007724B2 JP2008536246A JP2008536246A JP5007724B2 JP 5007724 B2 JP5007724 B2 JP 5007724B2 JP 2008536246 A JP2008536246 A JP 2008536246A JP 2008536246 A JP2008536246 A JP 2008536246A JP 5007724 B2 JP5007724 B2 JP 5007724B2
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- 229910052760 oxygen Inorganic materials 0.000 claims description 299
- 239000001301 oxygen Substances 0.000 claims description 294
- -1 oxygen ion Chemical class 0.000 claims description 229
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 65
- 230000005012 migration Effects 0.000 claims description 56
- 238000013508 migration Methods 0.000 claims description 56
- 230000001737 promoting effect Effects 0.000 claims description 38
- 229910000510 noble metal Inorganic materials 0.000 claims description 16
- 238000012546 transfer Methods 0.000 claims description 9
- 239000007784 solid electrolyte Substances 0.000 claims description 8
- 229910002367 SrTiO Inorganic materials 0.000 claims description 7
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical group [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 7
- 239000002178 crystalline material Substances 0.000 claims description 6
- 229910002077 partially stabilized zirconia Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 description 34
- 230000008569 process Effects 0.000 description 29
- 239000000463 material Substances 0.000 description 22
- 239000000758 substrate Substances 0.000 description 21
- 238000004544 sputter deposition Methods 0.000 description 15
- 239000007789 gas Substances 0.000 description 14
- 239000000470 constituent Substances 0.000 description 13
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- 229910004121 SrRuO Inorganic materials 0.000 description 7
- 230000005684 electric field Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 229910052697 platinum Inorganic materials 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000000155 isotopic effect Effects 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 229910052741 iridium Inorganic materials 0.000 description 3
- 229910052763 palladium Inorganic materials 0.000 description 3
- 229910052707 ruthenium Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 150000002500 ions Chemical group 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
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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
- G11C13/0009—RRAM elements whose operation depends upon chemical change
-
- 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
-
- 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
- G11C13/0069—Writing or programming circuits or methods
-
- 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
- H10N70/24—Multistable switching devices, e.g. memristors based on migration or redistribution of ionic species, e.g. anions, vacancies
-
- 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
-
- 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
-
- 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
- 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
- G11C13/0069—Writing or programming circuits or methods
- G11C2013/0083—Write to perform initialising, forming process, electro forming or conditioning
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2213/00—Indexing scheme relating to G11C13/00 for features not covered by this group
- G11C2213/10—Resistive cells; Technology aspects
- G11C2213/12—Non-metal ion trapping, i.e. using memory material trapping non-metal ions given by the electrode or another layer during a write operation, e.g. trapping, doping
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C2213/00—Indexing scheme relating to G11C13/00 for features not covered by this group
- G11C2213/10—Resistive cells; Technology aspects
- G11C2213/15—Current-voltage curve
-
- 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
- G11C2213/34—Material includes an oxide or a nitride
-
- 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
- G11C2213/55—Structure including two electrodes, a memory active layer and at least two other layers which can be a passive or source or reservoir layer or a less doped memory active layer
-
- 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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- Computer Hardware Design (AREA)
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Description
図6(a)に示す積層構成を有するサンプル素子S1を、抵抗変化型素子として作製した。サンプル素子S1における電極1,2の対向面積は31400μm2である(後出のサンプル素子S2〜S10における電極対の対向面積も31400μm2である)。このサンプル素子S1に対し、上述のフォーミング処理を施した後、高抵抗状態への上述のリセットと、これに続く低抵抗状態への上述のセットとを、複数回繰り返した。
図7(a)に示す積層構成を有するサンプル素子S2を作製した。このサンプル素子S2に対し、フォーミングDC電圧を15Vに代えて20Vとし、リセットパルス電圧を1.8Vに代えて2.0Vとし、セットパルス電圧を3.5Vに代えて5.5Vとした以外はサンプル素子S1と同様にして、上述のフォーミング処理を施した後、高抵抗状態への上述のリセットと、これに続く低抵抗状態への上述のセットとを、複数回繰り返した。
図8(a)に示す積層構成を有するサンプル素子S3を作製した。このサンプル素子S3に対し、フォーミングDC電圧を15Vに代えて18Vとし、セットパルス電圧を3.5Vに代えて4.8Vとした以外はサンプル素子S1と同様にして、上述のフォーミング処理を施した後、高抵抗状態への上述のリセットと、これに続く低抵抗状態への上述のセットとを、複数回繰り返した。
図9(a)に示す積層構成を有するサンプル素子S4を作製した。このサンプル素子S4に対し、フォーミングDC電圧を15Vに代えて25Vとし、リセットパルス電圧を1.8Vに代えて2.5Vとし、セットパルス電圧を3.5Vに代えて6.3Vとした以外はサンプル素子S1と同様にして、上述のフォーミング処理を施した後、高抵抗状態への上述のリセットと、これに続く低抵抗状態への上述のセットとを、複数回繰り返した。
図10(a)に示す積層構成を有するサンプル素子S5を作製した。このサンプル素子S5に対し、フォーミングDC電圧を15Vに代えて25Vとし、リセットパルス電圧を1.8Vに代えて4.3Vとし、セットパルス電圧を3.5Vに代えて13.5Vとした以外はサンプル素子S1と同様にして、フォーミング処理を施した後、高抵抗状態へのリセットと、これに続く低抵抗状態へのセットとを、複数回繰り返した。サンプル素子S5では、フォーミングDC電圧25V、リセットパルス電圧4.3V、セットパルス電圧13.5Vの条件において、高抵抗状態へのリセットと、これに続く低抵抗状態へのセットとを、30回繰り返すことはできたが、50回以上繰り返すことはできなかった。
図6(b)、図7(b)、図8(b)、図9(b)、および図10(b)に示す積層構成を有するサンプル素子S6〜S10を作製した。
Claims (10)
- 第1電極と、
第2電極と、
前記第1電極および前記第2電極の間に位置し、内部での酸素イオンの移動によって酸素空孔よりなる低抵抗路が生じ得る酸素イオン移動層と、
前記酸素イオン移動層に接して当該酸素イオン移動層および前記第1電極の間に位置する酸素イオン生成促進層と、を含む積層構造を有する、抵抗変化型素子。 - 第1電極と、
第2電極と、
前記第1電極および前記第2電極の間に位置し、内部での酸素イオンの移動によって酸素空孔よりなる低抵抗路が生じ得る酸素イオン移動層と、を含む積層構造を有し、
各々が前記酸素イオン移動層に接して当該酸素イオン移動層および前記第1電極の間に位置する、複数の酸素イオン生成促進層を有する、抵抗変化型素子。 - 前記酸素イオン移動層は、当該層の厚さ方向に当該層を低抵抗路が貫通する低抵抗状態と、当該層の厚さ方向に当該層を低抵抗路が貫通しない高抵抗状態との間を、変化可能である、請求項1または2に記載の抵抗変化型素子。
- 前記酸素イオン移動層は固体電解質よりなる、請求項1から3のいずれか一つに記載の抵抗変化型素子。
- 前記酸素イオン移動層は、蛍石構造型酸化物またはペロブスカイト構造型酸化物よりなる、請求項1から4のいずれか一つに記載の抵抗変化型素子。
- 前記蛍石構造型酸化物は部分安定化ジルコニアである、請求項5に記載の抵抗変化型素子。
- 前記酸素イオン移動層は、Y、Ca、またはMgが添加されたZrO2、ZrO2、Y2O3、SrTiO3、またはCaTiO3よりなる、請求項5に記載の抵抗変化型素子。
- 前記酸素イオン移動層は結晶質材料よりなる、請求項1から7のいずれか一つに記載の抵抗変化型素子。
- 前記酸素イオン生成促進層は、貴金属を含有する導電性酸化物よりなる、請求項1から8のいずれか一つに記載の抵抗変化型素子。
- 前記第1電極および/または前記第2電極は貴金属よりなる、請求項1から9のいずれか一つに記載の抵抗変化型素子。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2006/319289 WO2008038365A1 (en) | 2006-09-28 | 2006-09-28 | Variable-resistance element |
Publications (2)
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JPWO2008038365A1 JPWO2008038365A1 (ja) | 2010-01-28 |
JP5007724B2 true JP5007724B2 (ja) | 2012-08-22 |
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JP2008536246A Expired - Fee Related JP5007724B2 (ja) | 2006-09-28 | 2006-09-28 | 抵抗変化型素子 |
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US (1) | US7764160B2 (ja) |
JP (1) | JP5007724B2 (ja) |
WO (1) | WO2008038365A1 (ja) |
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US7764160B2 (en) | 2010-07-27 |
US20090121823A1 (en) | 2009-05-14 |
JPWO2008038365A1 (ja) | 2010-01-28 |
WO2008038365A1 (en) | 2008-04-03 |
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