JP2010534941A - 多状態の不揮発性メモリ素子 - Google Patents
多状態の不揮発性メモリ素子 Download PDFInfo
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- 230000015654 memory Effects 0.000 claims abstract description 127
- 239000000463 material Substances 0.000 claims abstract description 33
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 13
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 13
- 230000007704 transition Effects 0.000 claims description 17
- 239000004020 conductor Substances 0.000 abstract description 21
- 239000010410 layer Substances 0.000 description 178
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 8
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 6
- 239000005751 Copper oxide Substances 0.000 description 6
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 6
- 229910000428 cobalt oxide Inorganic materials 0.000 description 6
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 6
- 229910000431 copper oxide Inorganic materials 0.000 description 6
- 229910000480 nickel oxide Inorganic materials 0.000 description 6
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 6
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 6
- 229910001935 vanadium oxide Inorganic materials 0.000 description 6
- 229910001928 zirconium oxide Inorganic materials 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
- 238000003491 array Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 5
- 229910001936 tantalum oxide Inorganic materials 0.000 description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 5
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 4
- 229910000423 chromium oxide Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910000449 hafnium oxide Inorganic materials 0.000 description 4
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 4
- 229910000484 niobium oxide Inorganic materials 0.000 description 4
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 4
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 229910001930 tungsten oxide Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 3
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 3
- 239000003870 refractory metal Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- -1 tantalum Chemical compound 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
- H10N70/801—Constructional details of multistable switching devices
- H10N70/881—Switching materials
- H10N70/883—Oxides or nitrides
- H10N70/8833—Binary metal oxides, e.g. TaOx
-
- 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
-
- 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
-
- 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
- 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
-
- 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
- G11C2213/72—Array wherein the access device being a diode
-
- 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
- G11C2213/77—Array wherein the memory element being directly connected to the bit lines and word lines without any access device being used
-
- 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
- G11C2213/79—Array wherein the access device being a transistor
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Abstract
Description
Claims (15)
- 多状態の不揮発性メモリ素子であって、
第一の低抵抗状態および第一の高抵抗状態を有する第一の抵抗性スイッチング層と、
該第一の抵抗性スイッチング層と直列に接続され、第二の低抵抗状態および第二の高抵抗状態を有する第二の抵抗性スイッチング層と
を備え、
該第一の高抵抗状態の抵抗は、該第一の低抵抗状態の抵抗よりも大きく、かつ該第二の低抵抗状態の抵抗よりも大きく、
該第二の高抵抗状態の抵抗は、該第一の低抵抗状態の該抵抗よりも大きく、かつ該第二の低抵抗状態の該抵抗よりも大きい、
多状態の不揮発性メモリ素子。 - 前記第一の高抵抗状態の前記抵抗は、前記第二の高抵抗状態の前記抵抗よりも大きく、
前記第一の低抵抗状態の前記抵抗は、前記第二の低抵抗状態の前記抵抗よりも大きい、
請求項1に記載の多状態の不揮発性メモリ素子。 - 第三の抵抗性スイッチング層であって、前記第一の抵抗性スイッチング層および前記第二の抵抗性スイッチング層と直列に接続され、第三の低抵抗状態および第三の高抵抗状態を有する、第三の抵抗性スイッチング層
をさらに備え、
該第三の高抵抗状態の抵抗は、前記第一の低抵抗状態の前記抵抗よりも大きく、
該第三の高抵抗状態の該抵抗は、前記第二の低抵抗状態の前記抵抗よりも大きく、
該第三の高抵抗状態の該抵抗は、該第三の低抵抗状態の抵抗よりも大きい、
請求項1に記載の多状態の不揮発性メモリ素子。 - 前記第一の高抵抗状態の前記抵抗は、前記第二の高抵抗状態の前記抵抗よりも大きく、
該第二の高抵抗状態の該抵抗は、前記第三の高抵抗状態の前記抵抗よりも大きく、
前記第一の低抵抗状態の前記抵抗は、前記第二の低抵抗状態の前記抵抗よりも大きく、
該第一の低抵抗状態の該抵抗は、前記第三の低抵抗状態の前記抵抗よりも大きい、
請求項3に記載の多状態の不揮発性メモリ素子。 - 前記第一の高抵抗状態の前記抵抗は、前記第二の高抵抗状態の前記抵抗よりも大きく、
該第二の高抵抗状態の該抵抗は、前記第三の高抵抗状態の前記抵抗よりも大きく、
前記第二の低抵抗状態の前記抵抗は、前記第三の低抵抗状態の前記抵抗よりも大きい、
請求項3に記載の多状態の不揮発性メモリ素子。 - 前記第一の抵抗性スイッチング層は、第一のセット電圧が、前記多状態の不揮発性メモリ素子に印加されるときに、前記第一の高抵抗状態から前記第一の低抵抗状態にスイッチングし、
前記第二の抵抗性スイッチング層は、第二のセット電圧が、該多状態の不揮発性メモリ素子に印加されるときに、前記第二の高抵抗状態から前記第二の低抵抗状態にスイッチングし、
該第一の抵抗性スイッチング層は、リセット電圧が、該多状態の不揮発性メモリ素子に印加されるときに、該第一の低抵抗状態から該第一の高抵抗状態にスイッチングする、
請求項2に記載の多状態の不揮発性メモリ素子。 - 前記不揮発性メモリ素子は、前記第一のセット電圧が印加されるときに、前記第二の高抵抗状態の前記抵抗に略等しい第一の出力抵抗を有し、
該不揮発性メモリ素子は、前記第二のセット電圧が印加されるときに、前記第一の低抵抗状態の前記抵抗に略等しい第二の出力抵抗を有し、
該不揮発性メモリ素子は、前記リセット電圧が印加されるときに、前記第一の高抵抗状態の前記抵抗に略等しい第三の出力抵抗を有する、
請求項6に記載の多状態の不揮発性メモリ素子。 - 前記第一の抵抗性スイッチング層および前記第二の抵抗性スイッチング層は、抵抗性スイッチング金属酸化物層を含む、請求項1に記載の多状態の不揮発性メモリ素子。
- 多状態の不揮発性メモリ素子であって、
高抵抗状態および低抵抗状態を有する抵抗性スイッチング材料の第一の層と、
高抵抗状態および低抵抗状態を有する抵抗性スイッチング材料の第二の層と、
高抵抗状態および低抵抗状態を有する抵抗性スイッチング材料の第三の層と
を備え、
該第一の層、該第二の層、および該第三の層は、直列に接続され、各層は、それぞれの抵抗を有し、
該第一の層は、その高抵抗状態において、その高抵抗状態にある該第二の層よりも大きな抵抗を有し、
該第二の層は、その高抵抗状態において、その高抵抗状態にある該第三の層よりも大きな抵抗を有し、
該第一の層は、その低抵抗状態において、その低抵抗状態にある該第二の層よりも大きな抵抗を有し、かつその低抵抗状態にある該第三の層よりも大きな抵抗を有し、
該第一の層は、その高抵抗状態において、その低抵抗状態にある該第三の層よりも大きな抵抗を有する、
多状態の不揮発性メモリ素子。 - 前記第一の層、前記第二の層、および前記第三の層は、金属酸化物層を含む、請求項9に記載の多状態の不揮発性メモリ素子。
- 前記第一の層、前記第二の層、および前記第三の層は、金属酸化物層を含み、
該第一の層、該第二の層、および該第三の層のそれぞれは、その層が、その高抵抗状態とその低抵抗状態との間で移行する関連したセット電圧を有し、
該第一の層の該セット電圧は、該第二の層の該セット電圧未満であり、
該第二の層の該セット電圧は、該第三の層の該セット電圧未満である、
請求項9に記載の多状態の不揮発性メモリ素子。 - 前記第一の層、前記第二の層、および前記第三の層は、金属酸化物層を含み、
抵抗性スイッチング材料の該第一の層は、抵抗性スイッチング材料の該第一の層が、その高抵抗状態とその低抵抗状態との間で移行する第一のセット電圧を有し、
抵抗性スイッチング材料の該第二の層は、抵抗性スイッチング材料の該第二の層が、その高抵抗状態とその低抵抗状態との間で移行する第二のセット電圧を有し、
抵抗性スイッチング材料の該第三の層は、抵抗性スイッチング材料の該第三の層が、その高抵抗状態とその低抵抗状態との間で移行する第三のセット電圧を有し、
該第一のセット電圧、該第二のセット電圧、および該第三のセット電圧は異なる、
請求項9に記載の多状態の不揮発性メモリ素子。 - 前記第一の層は、該第一の層が、その低抵抗状態からその高抵抗状態に移行するリセット電圧を有する、請求項12に記載の多状態の不揮発性メモリ素子。
- 前記多状態の不揮発性メモリ素子は、前記第三のセット電圧が、該多状態の不揮発性メモリ素子に印加されるときに、その低抵抗状態にある前記第一の層の前記抵抗に実質的に等しい第一の抵抗を有し、
該多状態の不揮発性メモリ素子は、前記第二のセット電圧が、該多状態の不揮発性メモリ素子に印加されるときに、その高抵抗状態にある前記第三の層の前記抵抗に実質的に等しい第二の抵抗を有し、
該多状態の不揮発性メモリ素子は、前記第一のセット電圧が、該多状態の不揮発性メモリ素子に印加されるときに、その高抵抗状態にある前記第二の層の前記抵抗に実質的に等しい第三の抵抗を有し、
該多状態の不揮発性メモリ素子は、前記リセット電圧が、該多状態の不揮発性メモリ素子に印加されるときに、その高抵抗状態にある該第一の層の前記抵抗に実質的に等しい第四の抵抗を有する、
請求項13に記載の多状態の不揮発性メモリ素子。 - 多状態の不揮発性メモリ素子であって、
第一の低い状態および第一の高い状態を有する第一の抵抗性スイッチング層と、
第二の抵抗性スイッチング層であって、該第一の抵抗性スイッチング層と直列に接続され、第二の高い状態および第二の低い状態を有する、第二の抵抗性スイッチング層と
を備え、
該多状態の不揮発性メモリ素子を通る任意の所与の電流において、該第一の高い状態にある該第一の抵抗性スイッチング層をまたぐ電圧は、該第一の低い状態にある該第一の抵抗性スイッチング層をまたぐ電圧よりも大きく、かつ該第二の低い状態にある該第二の抵抗性スイッチング層をまたぐ電圧よりも大きく、
該多状態の不揮発性メモリ素子を通る該所与の電流において、該第二の高い状態にある該第二の抵抗性スイッチング層をまたぐ電圧は、該第一の低い状態にある該第一の抵抗性スイッチング層をまたぐ該電圧よりも大きく、かつ該第二の低い状態にある該第二の抵抗性スイッチング層をまたぐ該電圧よりも大きい、
多状態の不揮発性メモリ素子。
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US96202707P | 2007-07-25 | 2007-07-25 | |
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PCT/US2008/071088 WO2009015297A1 (en) | 2007-07-25 | 2008-07-24 | Multistate nonvolatile memory elements |
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US9343675B2 (en) | 2016-05-17 |
US20150053910A1 (en) | 2015-02-26 |
US20120091417A1 (en) | 2012-04-19 |
US20090026433A1 (en) | 2009-01-29 |
JP5501966B2 (ja) | 2014-05-28 |
US8101937B2 (en) | 2012-01-24 |
KR20100044180A (ko) | 2010-04-29 |
US8878151B2 (en) | 2014-11-04 |
WO2009015297A1 (en) | 2009-01-29 |
JP2013243391A (ja) | 2013-12-05 |
KR101482814B1 (ko) | 2015-01-14 |
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