JP5863302B2 - 二端子抵抗性スイッチングデバイス構造及びその製造方法 - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title description 8
- 239000000463 material Substances 0.000 claims description 128
- 238000000034 method Methods 0.000 claims description 108
- 239000004020 conductor Substances 0.000 claims description 45
- 239000003989 dielectric material Substances 0.000 claims description 37
- 238000005530 etching Methods 0.000 claims description 31
- 230000008569 process Effects 0.000 claims description 31
- 238000000151 deposition Methods 0.000 claims description 18
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 17
- 229910052709 silver Inorganic materials 0.000 claims description 15
- 239000004332 silver Substances 0.000 claims description 15
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 13
- 230000004888 barrier function Effects 0.000 claims description 12
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 12
- 229920005591 polysilicon Polymers 0.000 claims description 11
- 239000002210 silicon-based material Substances 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 11
- 229910052721 tungsten Inorganic materials 0.000 claims description 11
- 239000010937 tungsten Substances 0.000 claims description 11
- 230000000873 masking effect Effects 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052715 tantalum Inorganic materials 0.000 claims description 6
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 6
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- -1 tungsten nitride Chemical class 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052763 palladium Inorganic materials 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 2
- 238000011109 contamination Methods 0.000 claims 1
- 229910052759 nickel Inorganic materials 0.000 claims 1
- 239000010410 layer Substances 0.000 description 61
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 238000005229 chemical vapour deposition Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 229910052814 silicon oxide Inorganic materials 0.000 description 7
- 238000005234 chemical deposition Methods 0.000 description 6
- 239000000356 contaminant Substances 0.000 description 5
- 238000005240 physical vapour deposition Methods 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000015654 memory Effects 0.000 description 4
- 229910044991 metal oxide Inorganic materials 0.000 description 4
- 150000004706 metal oxides Chemical class 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000007772 electroless plating Methods 0.000 description 3
- 238000009713 electroplating Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005268 plasma chemical vapour deposition Methods 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
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000000231 atomic layer deposition Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002848 electrochemical method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005046 Chlorosilane Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910005866 GeSe Inorganic materials 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000004770 chalcogenides Chemical class 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- KOPOQZFJUQMUML-UHFFFAOYSA-N chlorosilane Chemical compound Cl[SiH3] KOPOQZFJUQMUML-UHFFFAOYSA-N 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000005289 physical deposition Methods 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 238000001039 wet etching Methods 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
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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
- 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
- H10N70/011—Manufacture or treatment 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 having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
- H10N70/011—Manufacture or treatment of multistable switching devices
- H10N70/061—Shaping switching materials
-
- 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
- H10N70/011—Manufacture or treatment of multistable switching devices
- H10N70/061—Shaping switching materials
- H10N70/063—Shaping switching materials by etching of pre-deposited switching material layers, e.g. lithography
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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
- 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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- 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
- H10N70/841—Electrodes
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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
- H10N70/841—Electrodes
- H10N70/8416—Electrodes adapted for supplying ionic species
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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
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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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- 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
- H10N70/884—Switching materials based on at least one element of group IIIA, IVA or VA, e.g. elemental or compound semiconductors
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Semiconductor Memories (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Semiconductor Integrated Circuits (AREA)
- Design And Manufacture Of Integrated Circuits (AREA)
Description
特定の実施形態では、この方法は、下部配線材料、コンタクト材料、及びスイッチング材料に対してマスキング層を使用して第1エッチングプロセスを行って第1構造を形成する。第1構造は、下部配線構造及びスイッチング素子を含む。第1構造は、上部表面領域及びサイド領域を有する。特定の実施形態では、上部表面領域は、スイッチング素子の上部領域を含む。この方法は、少なくとも、スイッチング素子の露出された上部領域を含む第1構造及び第1誘電体材料の露出部分に重なる第2誘電体材料を堆積することを含む。この方法は、第2誘電体材料のうち第1構造に重なる部分を維持しながら、少なくとも第1構造に重なる第2誘電体材料表面を平坦化することを含む。開口領域は、第2誘電体層の一部に形成され第1構造の上部表面領域の一部を露出させる。
この方法は、特定の実施形態では、開口領域を含む第2誘電体材料に重なり且つスイッチング素子と直接接触する導電性材料を堆積する。この方法は、導電性材料に重なる第1密着層を堆積すること及び第1密着層及び導電性材料に対して第2パターン及びエッチングプロセスを行うことを含む。第2パターン及びエッチングプロセスは、少なくとも開口領域において少なくとも導電性材料及び密着層を維持しながら、導電性材料の一部及び第1密着層の一部を除去して第2誘電体材料の表面領域を露出させる。上部配線材料は、第1密着層に重なり且つ第2誘電体層の露出部分に重なるように形成される。特定の実施形態では、上部配線材料に対して第2パターニング及びエッチングプロセスを行って上部配線構造を形成する。特定の実施形態では、第1構造のサイド領域は、少なくとも第2パターン及びエッチングプロセスからの汚染物導電性材料がない第1スイッチング素子のサイド領域を含み、上部配線構造と下部配線構造の間にショートが起こらない。
Claims (13)
- 二端子スイッチングデバイスを形成するための方法であって、
前記基板の表面領域に重なる第1誘電体材料を形成することと、
前記誘電体材料に重なる下部配線材料を堆積することと、
前記下部配線材料に重なるコンタクト材料を堆積することと、
前記コンタクト材料に重なるスイッチング材料を堆積することと、
前記スイッチング材料に重なるマスキング層を形成し、前記スイッチング材料の一部分を露出させることと、
前記マスキング層を使用した第1エッチングプロセスによって、前記下部配線材料、前記コンタクト材料、及び前記スイッチング材料に対してエッチングを行い、上部表面領域及び第1サイド領域を有する第1構造を形成することを備え、第1構造は、少なくとも下部配線構造及び前記スイッチング素子を含み、スイッチング素子は、第2サイド領域を有し、前記上部表面領域は、前記スイッチング素子の露出領域を含み、
少なくとも、前記スイッチング素子の前記露出領域を含む第1構造に重なり且つ第1誘電体材料の露出部分に重なる第2誘電体材料を堆積することと、
前記第2誘電体材料の一部が前記スイッチング素子の上部領域の上に重なって維持されるように、平坦化プロセスによって前記第2誘電体材料を処理して平坦化することと、
第2誘電体材料の一部に開口領域を形成してスイッチング素子の上部領域の一部を露出させることと、
第2誘電体材料、前記開口領域、及び前記スイッチング素子の上部領域の一部に重なる導電性材料を堆積することを備え、前記導電性材料は、前記スイッチング素子と接触し、
少なくとも前記導電性材料に重なる上部配線材料を堆積することと、
第2エッチングプロセスによって前記上部配線材料に対してエッチングを行って上部配線構造を形成することを備え、
前記スイッチング素子の第2サイド領域を含む前記第1構造の第1サイド領域が、汚染物導電性材料がないよう維持される、方法。
- 請求項1の方法であって、
前記上部配線構造及び下部配線構造は、クロスバー配置で空間的に配置されている、方法。 - 請求項1又は請求項2の方法であって、
前記上部配線材料は、第1密着材料又は第1バリヤー材料をさらに備え、
第1密着材料又は第1バリヤー材料は、チタン、窒化チタン、タンタル、タンタル窒化物、又はタングステン窒化物を含む、方法。 - 請求項1〜請求項3の何れかに記載の方法であって、
前記下部配線材料は、第2密着材料又は第2バリヤー材料をさらに備え、前記第2密着材料又は第2バリヤー材料は、チタン、窒化チタン、タンタル、タンタル窒化物、又はタングステン窒化物を含む、方法。 - 請求項1〜請求項4の何れかに記載の方法であって、
前記基板は、その上に製造された1又は複数のCMOSデバイスを含み、前記二端子スイッチングデバイスは、1又は複数のCMOSデバイスに作動的に結合されている、方法。 - 請求項1〜請求項5の何れかに記載の方法であって、
前記コンタクト材料は、ポリシリコン材料を備える、方法。 - 請求項6の方法であって、
前記ポリシリコン材料は、約10E17〜10E21cm -3 の範囲の濃度を有するボロンを使用してp+ドープされる、方法。 - 請求項6又は請求項7の方法であって、
前記ポリシリコン材料は、約50Å〜約2000Åの範囲の厚さを有する、方法。 - 請求項6又は請求項7の方法であって、
前記ポリシリコン材料は、約100Å〜約500Åの範囲の厚さを有する、方法 - 請求項1の方法であって、
前記スイッチング材料は、アモルファスシリコン材料である、方法。 - 請求項1〜請求項10の何れかに記載の方法であって、
前記導電性材料は、金属(例:金、白金、銀、パラジウム、ニッケル、又は銅(これらの任意の組み合わせを含む))を備える、方法。 - 請求項11の方法であって、
前記導電性材料は、約50Å〜約2000Åの範囲の厚さを有する銀を含む、方法。 - 請求項11の方法であって、
前記導電性材料は、約100Å〜約500Åの範囲の厚さを有する銀を含む、方法。
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US12/835,704 US9012307B2 (en) | 2010-07-13 | 2010-07-13 | Two terminal resistive switching device structure and method of fabricating |
US12/835,704 | 2010-07-13 |
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JP2012023374A JP2012023374A (ja) | 2012-02-02 |
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US (2) | US9012307B2 (ja) |
EP (1) | EP2408035A3 (ja) |
JP (1) | JP5863302B2 (ja) |
KR (1) | KR101860508B1 (ja) |
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2010
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2011
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EP2408035A3 (en) | 2014-11-26 |
KR20120006942A (ko) | 2012-01-19 |
US20150200362A1 (en) | 2015-07-16 |
JP2012023374A (ja) | 2012-02-02 |
US9012307B2 (en) | 2015-04-21 |
KR101860508B1 (ko) | 2018-05-23 |
CN102332531A (zh) | 2012-01-25 |
EP2408035A2 (en) | 2012-01-18 |
CN102332531B (zh) | 2016-01-20 |
US20120015506A1 (en) | 2012-01-19 |
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