JP6081171B2 - 記憶装置 - Google Patents
記憶装置 Download PDFInfo
- Publication number
- JP6081171B2 JP6081171B2 JP2012265958A JP2012265958A JP6081171B2 JP 6081171 B2 JP6081171 B2 JP 6081171B2 JP 2012265958 A JP2012265958 A JP 2012265958A JP 2012265958 A JP2012265958 A JP 2012265958A JP 6081171 B2 JP6081171 B2 JP 6081171B2
- Authority
- JP
- Japan
- Prior art keywords
- memory cell
- cell array
- bit line
- film
- word line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000003860 storage Methods 0.000 title claims description 112
- 230000015654 memory Effects 0.000 claims description 357
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- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
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- 239000003990 capacitor Substances 0.000 description 55
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- 238000000034 method Methods 0.000 description 43
- 239000001301 oxygen Substances 0.000 description 43
- 229910052760 oxygen Inorganic materials 0.000 description 43
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 17
- 125000004429 atom Chemical group 0.000 description 16
- 239000012535 impurity Substances 0.000 description 16
- 229910052814 silicon oxide Inorganic materials 0.000 description 16
- 239000002019 doping agent Substances 0.000 description 15
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- 239000001257 hydrogen Substances 0.000 description 15
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- -1 lanthanum (La) Chemical class 0.000 description 10
- IRLPACMLTUPBCL-KQYNXXCUSA-N 5'-adenylyl sulfate Chemical compound C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](COP(O)(=O)OS(O)(=O)=O)[C@@H](O)[C@H]1O IRLPACMLTUPBCL-KQYNXXCUSA-N 0.000 description 9
- 229910052581 Si3N4 Inorganic materials 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 238000005468 ion implantation Methods 0.000 description 9
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 9
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 7
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- 229910052719 titanium Inorganic materials 0.000 description 7
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- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 6
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- 239000003381 stabilizer Substances 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 5
- 230000008021 deposition Effects 0.000 description 5
- 238000001312 dry etching Methods 0.000 description 5
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- 229910020994 Sn-Zn Inorganic materials 0.000 description 4
- 229910009069 Sn—Zn Inorganic materials 0.000 description 4
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 4
- GPBUGPUPKAGMDK-UHFFFAOYSA-N azanylidynemolybdenum Chemical compound [Mo]#N GPBUGPUPKAGMDK-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
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- 229910052735 hafnium Inorganic materials 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229910018137 Al-Zn Inorganic materials 0.000 description 3
- 229910018573 Al—Zn Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 3
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- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
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- 239000012298 atmosphere Substances 0.000 description 3
- 238000000231 atomic layer deposition Methods 0.000 description 3
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- 238000007654 immersion Methods 0.000 description 3
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- 239000011261 inert gas Substances 0.000 description 3
- 238000001451 molecular beam epitaxy Methods 0.000 description 3
- 229910052754 neon Inorganic materials 0.000 description 3
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 3
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- 238000001004 secondary ion mass spectrometry Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
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- 239000011787 zinc oxide Substances 0.000 description 3
- 229910018120 Al-Ga-Zn Inorganic materials 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
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- 229910020833 Sn-Al-Zn Inorganic materials 0.000 description 2
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- 230000008859 change Effects 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 2
- 229910001195 gallium oxide Inorganic materials 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 229910000449 hafnium oxide Inorganic materials 0.000 description 2
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
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- 238000002513 implantation Methods 0.000 description 2
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- 238000002955 isolation Methods 0.000 description 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 2
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- 239000003870 refractory metal Substances 0.000 description 2
- 238000005477 sputtering target Methods 0.000 description 2
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910004129 HfSiO Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 108010083687 Ion Pumps Proteins 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 229910020868 Sn-Ga-Zn Inorganic materials 0.000 description 1
- 229910020944 Sn-Mg Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 229910009369 Zn Mg Inorganic materials 0.000 description 1
- 229910007573 Zn-Mg Inorganic materials 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
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- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 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
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 229910021334 nickel silicide Inorganic materials 0.000 description 1
- RUFLMLWJRZAWLJ-UHFFFAOYSA-N nickel silicide Chemical compound [Ni]=[Si]=[Ni] RUFLMLWJRZAWLJ-UHFFFAOYSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 229910052696 pnictogen Inorganic materials 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 230000003252 repetitive effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C8/00—Arrangements for selecting an address in a digital store
- G11C8/08—Word line control circuits, e.g. drivers, boosters, pull-up circuits, pull-down circuits, precharging circuits, for word lines
-
- 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
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/24—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using capacitors
-
- 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
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
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Description
図1に本実施の形態の記憶装置の構成を示す。図1(A)に示す記憶装置は、第1の入出力回路111a、並びに、第1のデコーダ113a、第1のセレクタ114a、及び第1の読み出し回路115aを有する第1のビット線駆動回路112aを有する第1のサブモジュール141aを有している。また、図1(A)に示す記憶装置は、第2のデコーダ122a、第1のレベルシフタ123a、第1のバッファ124aを有する第1のワード線駆動回路121aである第2のサブモジュール141bを有している。また、図1(A)に示す記憶装置は、第2の入出力回路111b、並びに、第3のデコーダ113b、第2のセレクタ114b、及び第2の読み出し回路115bを有する第2のビット線駆動回路112bを有する第3のサブモジュール141cを有している。また、図1(A)に示す記憶装置は、第4のデコーダ122b、第2のレベルシフタ123b、第2のバッファ124bを有する第2のワード線駆動回路121bである第4のサブモジュール141dを有している。
ビット線105及び接続配線131との接続点109、並びに、ワード線104及び接続配線131との接続点109は、2つのメモリセルアレイの境界部に配置される。そのため、接続点109が2つのメモリセルアレイの端部に配置された場合に比べて、ビット線105の寄生抵抗及びワード線104の寄生抵抗が半分となり、それぞれの寄生抵抗を低減することができる。
上述のように、メモリセル106には、酸化物半導体トランジスタ107、一方の端子が酸化物半導体トランジスタ107のソース又はドレインの他方に電気的に接続された保持容量108が配置されている。保持容量108の他方の端子には、低電源電位VSS(例えば、接地電位GND)が印加されている。酸化物半導体トランジスタ107のソース又はドレインの一方は、ビット線105に電気的に接続されており、酸化物半導体トランジスタ107のゲートは、ワード線104電気的に接続されている(図3(A)参照)。
図20は、本実施の形態の記憶装置の構造の一例を示す上面図であり、図12は、図20の二点鎖線C−Dに対応する断面図である。図20及び図12に示す記憶装置は、上部にメモリセル106が複数設けられたメモリセルアレイ101を有し、下部に駆動回路210を有する。上部のメモリセルアレイ101は、酸化物半導体膜644を用いた酸化物半導体トランジスタ107を有し、下部の駆動回路210は、単結晶または多結晶のシリコンまたはゲルマニウムなどの半導体を用いたトランジスタ660を有する。また、図13は、図12に示す酸化物半導体トランジスタ107の拡大図である。
以下に、上述した記憶装置を有する半導体装置の例について説明する。当該半導体装置は、開示される発明の一態様に係る記憶装置を用いることで、信頼性を高め、小型化を実現することが可能である。特に携帯用の半導体装置の場合、開示される発明の一態様に係る記憶装置を用いることで小型化が実現されれば、使用者の使い勝手が向上するというメリットが得られる。
101 メモリセルアレイ
101a メモリセルアレイ
101b メモリセルアレイ
101c メモリセルアレイ
101d メモリセルアレイ
104 ワード線
105 ビット線
106 メモリセル
107 酸化物半導体トランジスタ
108 保持容量
109 接続点
111 入出力回路
111a 第1の入出力回路
111b 第2の入出力回路
112 ビット線駆動回路
112a 第1のビット線駆動回路
112b 第2のビット線駆動回路
113 デコーダ
113a 第1のデコーダ
113b 第3のデコーダ
114 セレクタ
114a 第1のセレクタ
114b 第2のセレクタ
115 読み出し回路
115a 第1の読み出し回路
115b 第2の読み出し回路
116 プリチャージ回路
117 メインアンプ
118 第1のスイッチ
119 第2のスイッチ
121 ワード線駆動回路
121a 第1のワード線駆動回路
121b 第2のワード線駆動回路
122 デコーダ
122a 第2のデコーダ
122b 第4のデコーダ
123 レベルシフタ
123a 第1のレベルシフタ
123b 第2のレベルシフタ
124 バッファ
124a 第1のバッファ
124b 第2のバッファ
131 接続配線
132 スイッチング素子
133 寄生容量
135 増幅素子
141a 第1のサブモジュール
141b 第2のサブモジュール
141c 第3のサブモジュール
141d 第4のサブモジュール
151a 矢印
151b 矢印
151c 矢印
151d 矢印
161a 矢印
161b 矢印
161c 矢印
161d 矢印
171a 矢印
171b 矢印
171c 矢印
171d 矢印
190 回路
210 駆動回路
221 pチャネル型トランジスタ
222 pチャネル型トランジスタ
223 nチャネル型トランジスタ
224 nチャネル型トランジスタ
225 nチャネル型トランジスタ
226 nチャネル型トランジスタ
227 nチャネル型トランジスタ
228 nチャネル型トランジスタ
229 nチャネル型トランジスタ
231 配線
232 配線
233 配線
234 端子
235 配線
236 配線
237 配線
300 記憶装置
301 メモリセルアレイ
311 入出力回路
312 ビット線駆動回路
313 デコーダ
314 セレクタ
315 増幅回路
321 ワード線駆動回路
322 デコーダ
323 レベルシフタ
324 バッファ
401 メモリセルアレイ
404 ワード線
405 ビット線
406 メモリセル
411 入出力回路
412 ビット線駆動回路
413 デコーダ
416 SENSE・AMPS・IO・GATING
421 ワード線駆動回路
481 DATA−IN・BUFFER
482 DATA−OUT・BUFFER
483 CONTROLLER
600 基板
606 素子分離絶縁層
608 ゲート絶縁膜
610 ゲート電極
616 チャネル形成領域
620 不純物領域
624 金属間化合物領域
628 絶縁膜
630a 電極
630b 電極
636 電極
640 絶縁膜
642a 電極
642b 電極
644 酸化物半導体膜
645 絶縁膜
646 ゲート絶縁膜
648 ゲート電極
649 電極
652 層間絶縁膜
660 トランジスタ
672a サイドウォール
672b サイドウォール
673a 電極
673b 電極
674 絶縁膜
675 絶縁膜
676 絶縁膜
677 絶縁膜
678 導電膜
2100 基板
2102 絶縁層
2104 ゲート電極
2106 酸化物半導体膜
2112 ゲート絶縁膜
2116 電極
2118 保護絶縁膜
7031 筐体
7032 筐体
7033 表示部
7034 表示部
7035 マイクロホン
7036 スピーカ
7037 操作キー
7038 スタイラス
7041 筐体
7042 表示部
7043 音声入力部
7044 音声出力部
7045 操作キー
7046 受光部
7051 筐体
7052 表示部
7053 操作キー
Claims (5)
- 駆動回路と、第1のメモリセルアレイと、第2のメモリセルアレイと、第3のメモリセルアレイと、第4のメモリセルアレイと、を有し、
前記駆動回路は、第1のビット線駆動回路と、第2のビット線駆動回路と、第1のワード線駆動回路と、第2のワード線駆動回路と、を有し、
前記第1のメモリセルアレイは、前記第1のビット線駆動回路上に位置し、
前記第2のメモリセルアレイは、前記第1のワード線駆動回路上に位置し、
前記第3のメモリセルアレイは、前記第2のビット線駆動回路上に位置し、
前記第4のメモリセルアレイは、前記第2のワード線駆動回路上に位置し、
前記第1のビット線駆動回路と、前記第2のビット線駆動回路とは、前記駆動回路において第1の対角線上に配置され、
前記第1のワード線駆動回路と、前記第2のワード線駆動回路とは、前記駆動回路において前記第1の対角線と交わる第2の対角線上に配置され、
前記第1のメモリセルアレイは、第1のビット線及び第1のワード線を有し、
前記第2のメモリセルアレイは、第2のビット線及び第2のワード線を有し、
前記第3のメモリセルアレイは、第3のビット線及び前記第2のワード線を有し、
前記第4のメモリセルアレイは、第4のビット線及び前記第1のワード線を有し、
前記第1のワード線は、前記第1のメモリセルアレイと前記第4のメモリセルアレイとの境界部を介して前記第2のワード線駆動回路と接続され、
前記第2のワード線は、前記第2のメモリセルアレイと前記第3のメモリセルアレイとの境界部を介して前記第1のワード線駆動回路と接続され、
前記第1のビット線と、前記第2のビット線は、前記第1のメモリセルアレイと前記第2のメモリセルアレイとの境界部を介して前記第1のビット線駆動回路に接続され、
前記第3のビット線と、前記第4のビット線は、前記第3のメモリセルアレイと前記第4のメモリセルアレイとの境界部を介して前記第2のビット線駆動回路に接続されていることを特徴とする記憶装置。 - 請求項1において、
前記第1のビット線駆動回路は、前記第1のビット線と前記第2のビット線の電位の差を増幅する増幅素子を有し、
前記第2のビット線駆動回路は、前記第3のビット線と前記第4のビット線の電位の差を増幅する増幅素子を有することを特徴とする記憶装置。 - 請求項1又は請求項2において、
前記第1及び前記第2のビット線駆動回路のそれぞれは、第1のデコーダ、セレクタ、及び、読み出し回路を有し、
前記第1及び前記第2のワード線駆動回路はそれぞれ、第2のデコーダ、レベルシフタ、及び、バッファを有することを特徴とする記憶装置。 - 請求項1乃至請求項3のいずれか一項において、
前記第1のメモリセルアレイは、酸化物半導体を有するトランジスタを有し、
前記駆動回路は、シリコンを有するトランジスタを有することを特徴とする記憶装置。 - 請求項1乃至請求項4のいずれか一項において、
前記第1のメモリセルアレイは、前記第1のワード線を複数有し、
前記第4のメモリセルアレイは、前記第1のワード線を複数有し
複数の前記第1のワード線は、複数の開口部をそれぞれ介して、前記第2のワード線駆動回路と接続され、
前記複数の開口部は、前記第1のメモリセルアレイと前記第4のメモリセルアレイとの境界部に位置し、
前記複数の開口部は、前記第1のビット線の方向に沿って並んでいることを特徴とする記憶装置。
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US9312280B2 (en) | 2014-07-25 | 2016-04-12 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device |
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