WO2004077562A1 - 電極層および誘電体層を含む積層体ユニット - Google Patents
電極層および誘電体層を含む積層体ユニット Download PDFInfo
- Publication number
- WO2004077562A1 WO2004077562A1 PCT/JP2004/001841 JP2004001841W WO2004077562A1 WO 2004077562 A1 WO2004077562 A1 WO 2004077562A1 JP 2004001841 W JP2004001841 W JP 2004001841W WO 2004077562 A1 WO2004077562 A1 WO 2004077562A1
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- WIPO (PCT)
- Prior art keywords
- bismuth
- symbol
- group
- layered compound
- dielectric layer
- Prior art date
Links
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 192
- 150000001875 compounds Chemical class 0.000 claims abstract description 166
- 239000000872 buffer Substances 0.000 claims abstract description 91
- 239000000203 mixture Substances 0.000 claims abstract description 75
- 239000003990 capacitor Substances 0.000 claims abstract description 50
- 239000003989 dielectric material Substances 0.000 claims abstract description 40
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000004888 barrier function Effects 0.000 claims abstract description 25
- 239000013078 crystal Substances 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 21
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 17
- 239000010703 silicon Substances 0.000 claims abstract description 17
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 12
- 239000011572 manganese Substances 0.000 claims description 50
- 239000011734 sodium Substances 0.000 claims description 50
- 239000004065 semiconductor Substances 0.000 claims description 43
- 239000010936 titanium Substances 0.000 claims description 42
- 239000010955 niobium Substances 0.000 claims description 40
- 239000011575 calcium Substances 0.000 claims description 38
- 239000011651 chromium Substances 0.000 claims description 38
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 35
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 29
- 229910052721 tungsten Inorganic materials 0.000 claims description 29
- 239000010937 tungsten Substances 0.000 claims description 29
- 229910052750 molybdenum Inorganic materials 0.000 claims description 26
- 229910052758 niobium Inorganic materials 0.000 claims description 26
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 25
- 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 claims description 25
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 25
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 25
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 25
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 25
- 229910052787 antimony Inorganic materials 0.000 claims description 25
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 25
- 229910052804 chromium Inorganic materials 0.000 claims description 25
- 229910052748 manganese Inorganic materials 0.000 claims description 25
- 239000011733 molybdenum Substances 0.000 claims description 25
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 25
- 229910052700 potassium Inorganic materials 0.000 claims description 25
- 239000011591 potassium Substances 0.000 claims description 25
- 229910052708 sodium Inorganic materials 0.000 claims description 25
- 229910052715 tantalum Inorganic materials 0.000 claims description 25
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 25
- 229910052719 titanium Inorganic materials 0.000 claims description 25
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 25
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 24
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 24
- 229910052791 calcium Inorganic materials 0.000 claims description 24
- 229910052733 gallium Inorganic materials 0.000 claims description 24
- 229910017052 cobalt Inorganic materials 0.000 claims description 23
- 239000010941 cobalt Substances 0.000 claims description 23
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 20
- 229910052788 barium Inorganic materials 0.000 claims description 19
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 19
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 18
- 229910052712 strontium Inorganic materials 0.000 claims description 17
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 17
- 239000010931 gold Substances 0.000 claims description 12
- 239000010948 rhodium Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052737 gold Inorganic materials 0.000 claims description 6
- 229910052741 iridium Inorganic materials 0.000 claims description 6
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052763 palladium Inorganic materials 0.000 claims description 6
- 229910052703 rhodium Inorganic materials 0.000 claims description 6
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052707 ruthenium Inorganic materials 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 5
- -1 (G a) Substances 0.000 claims description 2
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000000407 epitaxy Methods 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- IYNWNKYVHCVUCJ-UHFFFAOYSA-N bismuth Chemical compound [Bi].[Bi] IYNWNKYVHCVUCJ-UHFFFAOYSA-N 0.000 claims 77
- 229910052742 iron Inorganic materials 0.000 claims 8
- 238000003475 lamination Methods 0.000 claims 5
- 229910052720 vanadium Inorganic materials 0.000 claims 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims 1
- 229910052744 lithium Inorganic materials 0.000 claims 1
- 230000000269 nucleophilic effect Effects 0.000 claims 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 abstract description 113
- 239000010409 thin film Substances 0.000 description 45
- 238000000034 method Methods 0.000 description 37
- 235000012431 wafers Nutrition 0.000 description 19
- 238000005229 chemical vapour deposition Methods 0.000 description 11
- 238000004544 sputter deposition Methods 0.000 description 10
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 238000000354 decomposition reaction Methods 0.000 description 9
- 238000004549 pulsed laser deposition Methods 0.000 description 8
- 230000005669 field effect Effects 0.000 description 7
- OBETXYAYXDNJHR-SSDOTTSWSA-M (2r)-2-ethylhexanoate Chemical compound CCCC[C@@H](CC)C([O-])=O OBETXYAYXDNJHR-SSDOTTSWSA-M 0.000 description 6
- OBETXYAYXDNJHR-UHFFFAOYSA-N alpha-ethylcaproic acid Natural products CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 6
- 239000007791 liquid phase Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000001771 vacuum deposition Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 4
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 238000010030 laminating Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 241000797947 Paria Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000000113 differential scanning calorimetry Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000001182 laser chemical vapour deposition Methods 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 239000002887 superconductor Substances 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
- 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
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 241000700560 Molluscum contagiosum virus Species 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052773 Promethium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 150000001621 bismuth Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 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
- 238000001704 evaporation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity 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
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- VQMWBBYLQSCNPO-UHFFFAOYSA-N promethium atom Chemical compound [Pm] VQMWBBYLQSCNPO-UHFFFAOYSA-N 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 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
- 238000003980 solgel method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000001947 vapour-phase growth Methods 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/33—Thin- or thick-film capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/228—Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/01—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate comprising only passive thin-film or thick-film elements formed on a common insulating substrate
- H01L27/016—Thin-film circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L28/00—Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
- H01L28/40—Capacitors
- H01L28/55—Capacitors with a dielectric comprising a perovskite structure material
- H01L28/56—Capacitors with a dielectric comprising a perovskite structure material the dielectric comprising two or more layers, e.g. comprising buffer layers, seed layers, gradient layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L28/00—Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
- H01L28/40—Capacitors
- H01L28/60—Electrodes
- H01L28/65—Electrodes comprising a noble metal or a noble metal oxide, e.g. platinum (Pt), ruthenium (Ru), ruthenium dioxide (RuO2), iridium (Ir), iridium dioxide (IrO2)
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
Definitions
- Laminate unit including electrode layer and dielectric layer
- the present invention relates to a laminate unit including an electrode layer and a dielectric layer, and more particularly, to a semiconductor unit together with other devices such as a field effect transistor (FET) and a PU (Central Processing Unit).
- FET field effect transistor
- PU Central Processing Unit
- the present invention relates to a laminated unit including an electrode layer and a dielectric layer, which is capable of forming a small-sized, large-capacity thin-film capacitor having excellent dielectric characteristics suitable for being incorporated into a wafer.
- FET field effect transistor
- CPU Central Processing Unit
- Japanese Patent Laid-Open Publication No. 2001-150382 discloses that PZT, PLZT, (B a, S r) Tio 3 (BST), and T a are used as dielectric materials.
- PZT, PLZT, (B a, S r) Tio 3 (BST), and T a are used as dielectric materials.
- the dielectric thin film formed by these materials not only reduces the dielectric constant when the thickness is reduced, but also, for example, when an electric field of 100 kV / cm is applied, the capacitance becomes small.
- these materials are used as a dielectric material of a thin film capacitor, it is difficult to obtain a small and large-capacity thin film capacitor.
- the dielectric thin film formed by these materials has low surface smoothness, there is a problem that if the thickness is reduced, insulation failure or the like is likely to occur.
- the properties of the bismuth layered compound as a ferroelectric substance are not preferable when the bismuth layered compound is used as a dielectric of a thin film capacitor, because it causes a change in the dielectric constant. It is preferable that the property is sufficiently exhibited.
- the bismuth layer compound is oriented in the direction of the orientation axis that shows the property and quality as a ferroelectric substance of the bismuth layer compound and exhibits the property as a paraelectric substance, and the field effect transistor (FET) or CPU (Central Processing Unit) Along with other devices such as), there is a demand for the development of large-capacity thin-film capacitors with excellent dielectric properties suitable for incorporation into semiconductor wafers. Disclosure of the invention
- the present invention relates to a field effect transistor (FET) or a CP.
- FET field effect transistor
- CP CP
- U Central Processing Unit
- the electrode layer and dielectric layer that can constitute a thin film capacitor with small size and excellent large-capacity dielectric properties suitable for being incorporated into semiconductor wafers
- U Central Processing Unit
- Such and other objects of the present invention are to provide a semiconductor device having a barrier layer, an electrode layer formed of a conductive material, and a puffer layer containing a bismuth layered compound oriented in the [001] direction.
- a dielectric layer made of a dielectric material containing a bismuth layered compound formed by epitaxy growth and oriented in the [001] direction; and a bismuth layer formed in the buffer layer is formed in this order.
- As the compound a bismuth layered compound excellent in orientation is selected.
- the bismuth layered compound contained in the dielectric layer a bismuth layered compound excellent in characteristics as a capacitor material is selected, and the buffer layer and the dielectric are selected. This is achieved by a laminate unit in which an interface is formed between the layers.
- the [001] orientation refers to the [001] orientation in cubic, tetragonal, monoclinic, and orthorhombic.
- the material constituting the semiconductor wafer can be effectively prevented from dissolving into the electrode layer and invading the electrode layer.
- the material constituting the electrode layer can be effectively prevented from diffusing into the semiconductor wafer and corroding the semiconductor wafer.
- the capacitor characteristics are improved on the buffer layer.
- a dielectric layer made of a dielectric material containing a bismuth layered compound oriented in an azimuth can be formed.
- the present invention it becomes possible to orient the c-axis of the bismuth layer compound having excellent capacitor characteristics contained in the dielectric layer perpendicularly to the electrode layer.
- the upper electrode When a voltage is applied between the electrode layer and the upper electrode, the direction of the electric field is almost the same as the c-axis of the bismuth layered compound contained in the dielectric layer, so the bismuth layer contained in the dielectric layer.
- the properties of the compound as a ferroelectric can be suppressed, and the properties as a paraelectric can be fully exhibited. Therefore, a small-sized, large-capacity thin-film capacitor, together with other devices, can be used as a semiconductor device. It becomes possible to incorporate into.
- the dielectric layer made of a dielectric material containing a bismuth layered compound with improved c-axis orientation has high insulating properties, the dielectric layer can be made thinner. According to this, it is possible to further reduce the size of the thin film capacitor, and it is possible to further reduce the size of the semiconductor device in which the thin film capacitor is incorporated.
- an upper electrode is formed on a dielectric layer and another semiconductor device such as a CPU (Central Processing Unit) is mounted on the manufactured thin film capacitor
- another semiconductor device such as a CPU (Central Processing Unit)
- the thermal expansion of the thin film capacitor matches the coefficient of thermal expansion of the other semiconductor devices mounted on it, and the difference in the coefficient of thermal expansion between the mounted devices effectively breaks the junction between the two devices. Can be prevented.
- the dielectric material containing the bismuth layer compound may contain unavoidable impurities.
- the bismuth layer compound contained in the buffer layer has a different composition from the bismuth layer compound 1S contained in the dielectric layer, whereby the buffer layer and the dielectric layer have different compositions.
- An interface is formed between the layers.
- the buffer layer and the dielectric layer are formed by different thin film forming methods, whereby an interface is provided between the buffer layer and the dielectric layer. Are formed.
- the bismuth layer compound contained in the buffer layer may have the same composition.
- the material for forming a semiconductor wafer is not particularly limited as long as it is a material used for manufacturing a semiconductor device incorporating various devices.
- a silicon single crystal Gallium arsenide crystal or the like can be used.
- the laminate unit includes a paria layer on a semiconductor wafer.
- the barrier layer has a function of preventing the material forming the semiconductor wafer from dissolving into the electrode layer formed on the barrier layer and invading the electrode layer.
- the material for forming the barrier layer is not particularly limited as long as it can prevent the electrode layer from being affected by the semiconductor layer.
- silicon oxide is preferably used to form a parier layer from the viewpoint of cost
- gallium arsenide crystal is used as a semiconductor wafer, from the viewpoint of stability, in order to form the barrier layer, aluminum oxide (a 1 2 0 3) and magnesium oxide (M g O) is preferably used.
- the barrier layer is formed so as to have a thickness greater than that of a metal layer formed thereon without being affected by the semiconductor wafer.
- the laminate unit includes an electrode layer formed of a conductive material on the barrier layer.
- the material for forming the electrode layer is not particularly limited, and platinum (Pt), ruthenium (Ru), rhodium (Rh), palladium (Pd), iridium (Ir ), gold (Au), silver (Ag), copper (C u), and alloys composed mainly metals and these such as nickel (N i), N d O , Nb O, R H_ ⁇ 2, O s 0 2, I R_ ⁇ 2, R u O 2, S r Mo O 3, S r R uO 3, C a R u 0 3, S r VO 3, S r C r O 3, S r C o O 3, L a N i ⁇ 3, N b doped S r T i O 3 conductive oxide, goods Contact Yopi mixtures thereof, such as news, superconducting, such as B i 2 S r 2 C u O 6 A superconductor having a conductive bismuth layer structure can be used.
- the electrode layer is formed by a vacuum deposition method, a sputtering method, a pulse laser deposition method (pLD), a metal-organic chemical vapor deposition (MOCVD) method, an organic metal decomposition method.
- metal-organic decomposition MO D
- the laminate unit includes a buffer layer containing a bismuth layered compound oriented in the [001] direction, that is, in the c-axis direction, on the electrode layer.
- the buffer layer is formed by epitaxially growing a dielectric material containing a bismuth layer compound having excellent capacitor characteristics, and forming a bismuth layer compound oriented in the [00 1] direction, that is, in the c-axis direction. It has a function of ensuring that a dielectric layer made of a dielectric material can be formed.
- the bismuth layered compound forming the buffer layer a bismuth layered compound excellent in orientation different from the bismuth layered compound forming the dielectric layer is selected.
- T a antimony
- S b antimony
- Mn manganese
- V vanadium
- Mo molybdenum
- W tungsten
- a bismuth layer compound each ⁇ 5 0 3 consists of la ( ⁇ - 1) were continuous the number of Bae Robusukai bets grating Layered base Robusukai coat layer 1, (B i 2 0 2 ) 2 + layer 2 and has a layered structure laminated alternately.
- Layered Bae Robusukai coat layer 1 (B i 2 0 2) number of laminated 2+ layer 2 is not intended to be particularly limited, with a pair of (B i 2 0 2) 2+ layer 2 less, these It is sufficient to have one layered perovskite layer 1 sandwiched.
- the c-axis of the bismuth layer compound a pair of (B i 2 0 2) 2+ layer 2 direction connecting to each other, ie, a [0 0 1] direction.
- the chemistry of m 3 stoichiometric composition formula: (B i 2 0 2) 2+ (a 2 3 O 1 0) 2
- B i 2 4 2 3 0 E 2 forms a buffer layer Therefore, it is preferably used.
- the degree of orientation of the [001] orientation of the bismuth layered compound contained in the buffer layer that is, the degree of c-axis orientation is not necessarily 100%, and the degree of c-axis orientation is not necessarily 100%. What is necessary is just 80% or more.
- the degree of c-axis orientation is preferably 90%. It is more preferable that the degree of axial orientation is 95% or more.
- the degree of c-axis orientation of the bismuth layered compound is defined by the following equation (1).
- P is the c-axis orientation ratio of a completely random bismuth layered compound, That is, the reflection intensity of the bismuth layered compound having a completely random orientation from the (0 2) plane / The total of (0 1) ⁇ / (0 0 i) and each of the bismuth layered compounds Reflection intensity from crystal plane ⁇ hk 1) /. , Hk 1, the ratio of ⁇ I 0 hk 1, and ( ⁇ /. (0 0) Z ⁇ /.
- Is a known constant
- the buffer layer is formed by vacuum deposition, sputtering, pulsed laser deposition (PLD), metal-organic chemical vapor deposition (MOCVD), and metal-organic decomposition (MOCVD).
- PLD pulsed laser deposition
- MOCVD metal-organic chemical vapor deposition
- MOCVD metal-organic decomposition
- MOD ⁇ Zonole * It can be formed by various thin film formation methods such as liquid phase method (CSD method) such as Genole method, etc.
- CSD method liquid phase method
- the buffer layer needs to be formed at low temperature, Plasma CVD, optical CVD, laser CVD, optical CSD, laser, preferably using the SD method.
- the laminate unit is formed on the buffer layer by epitaxial growth, and is made of a dielectric material containing a bismuth layered compound oriented in the [001] direction, that is, the c-axis direction. It has a body layer.
- the dielectric layer is formed by epitaxially growing a dielectric material containing a bismuth layered compound on the buffer layer.
- the dielectric layer is formed by epitaxially growing a dielectric material containing a bismuth layered compound on a buffer layer oriented in the [001] direction, that is, in the c-axis direction.
- the bismuth layered compound contained in the layer is surely oriented in the [01] direction, that is, in the c-axis direction. Therefore, when a thin film capacitor is formed using the multilayer unit according to the present invention, the bismuth layer compound contained in the dielectric layer functions not as a ferroelectric but as a paraelectric. Therefore, it is possible to produce a small-sized, large-capacity thin-film capacitor having excellent dielectric properties by using the laminate unit according to the present invention.
- the degree of orientation of the [001] orientation of the bismuth layered compound contained in the dielectric layer that is, the c-axis orientation is not necessarily 100%, and the c-axis orientation is not necessarily 100%. Should be 80% or more.
- the c-axis orientation is preferably 90%, and more preferably 95% or more.
- the degree of c-axis orientation of the bismuth layered compound is defined by equation (1).
- the thickness of the dielectric layer is set to, for example, 100 nm or less.
- a thin film capacitor having a relatively high dielectric constant and a low loss (tan ⁇ ) can be obtained, and has excellent leakage characteristics, improved withstand voltage, excellent dielectric constant temperature characteristics, and excellent surface smoothness. Can be obtained.
- the bismuth layered compound for forming the dielectric layer is excellent in characteristics as a capacitor material among the above-mentioned bismuth layered compounds, and is different from the bismuth layered compound contained in the buffer layer A bismuth layer compound is selected.
- the bismuth layered compound contained in the dielectric layer the stoichiometric compositional formula: C a X S r (1 - x) is represented by B i 4 T i 4 ⁇ 15 [delta] Composition have. Where 0 x ⁇ l.
- a bismuth layered compound having such a composition is used, a dielectric layer having a relatively large dielectric constant can be obtained, and its temperature characteristics are further improved.
- a part of the element represented by the symbol _ ⁇ or ⁇ represents scandium (S c;), yttrium (Y), lanthanum ( L a), cerium (C e :), praseodymium (P r), neodymium (N d), promethium (Pm), samarium (Sm), europium pium (E u), gadolinium (G d), terbi Group consisting of zinc (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb) and lutetium (Lu) It is preferably substituted by at least one element selected from the group consisting of? E (yttrium (Y) or a rare earth element).
- the Curie temperature of the dielectric layer (the phase transition temperature from ferroelectric to paraelectric) is preferably at least 100 ° C. The temperature can be kept at not more than 500 ° C, more preferably, not less than 150 ° C and not more than 50 ° C. When the Curie point is between 100 ° C.
- the dielectric constant of the dielectric layer is improved.
- Curie temperature can be measured by DSC (differential scanning calorimetry) or the like. When the Curie point becomes lower than room temperature (25 ° C), ta ⁇ ⁇ further decreases, and as a result, the loss Q value further increases.
- the dielectric layer of the laminate unit according to the present invention has excellent leakage characteristics, some of the elements represented by the symbol ⁇ or ⁇ in the stoichiometric composition formula of the bismuth layered compound However, when the element is replaced by an element, the leak characteristics of the dielectric layer can be further improved, which is preferable.
- the dielectric unit of the laminate unit according to the present invention may be used. body layer, the leakage current when measured at electric field.
- the short-circuit rate can be preferably 10% or less, more preferably 5% or less, but the stoichiometric composition of the bismuth layered compound in the stoichiometric composition formula some symbols _ ⁇ or ⁇ represented by element, by the element, when it is substituted, the leakage current when measured under the same conditions, preferably, 5 X 1 0- 8 AZ cm 2 or less, more preferably, it can be 1 X 1 0- 8 a / " cm 2 or less, the short rate , Preferably 5% or less, more preferably, it may be 3% or less.
- the dielectric layer vacuum deposition, sputtering, pulse laser deposition (PLD), metal organic chemical vapor deposition (metal- organic chemical vapor deposition: MOCV ) N 3 ⁇ 4 machine metal content angles early method (metal-organic decomposition: MOD) ⁇
- PLD pulse laser deposition
- MOCV metal organic chemical vapor deposition
- MOCV metal organic chemical vapor deposition
- MOCV metal organic chemical vapor deposition
- MOCV metal organic chemical vapor deposition
- MOCV metal organic chemical vapor deposition
- MOCV metal organic chemical vapor deposition
- MOCV metal organic chemical vapor deposition
- MOCV metal organic chemical vapor deposition
- MOD machine metal content angles early method
- ⁇ metal-organic decomposition: MOD
- It can be formed using various thin film forming methods such as liquid phase method (CSD method) such as Zonore-Genole method.
- CSD method liquid phase method
- the laminate unit including the electrode layer and the dielectric layer according to the present invention can be used not only as a component of a thin film capacitor, but also to emit an inorganic EL element. Can also be used as a laminate unit for the purpose. That is, inorganic
- an insulating layer is required between the electrode layer and the inorganic EL element, but a dielectric layer made of a dielectric material containing a bismuth layered compound having improved c-axis orientation is provided. Has a high insulating property, so that the inorganic EL element is disposed on the dielectric layer, another electrode is disposed on the inorganic EL element, and the electrode layer and another electrode are By applying a voltage during the period, the inorganic EL element can emit light as desired.
- FIG. 1 is a diagram schematically showing the structure of a bismuth layered compound.
- FIG. 2 is a schematic partial cross-sectional view of a laminated unit according to a preferred embodiment of the present invention. DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION
- FIG. 2 is a schematic partial cross-sectional view of a laminate unit according to a preferred embodiment of the present invention.
- the laminate unit 1 includes a support substrate 2 on which a barrier layer 3, an electrode layer 4, a buffer layer 5, and a dielectric layer 6 are laminated in this order. It is formed.
- the end substrate 2 of the multilayer unit 1 is formed of silicon single crystal.
- the laminate unit 1 includes a parier layer 3 formed of silicon oxide on a support substrate 2.
- the barrier layer 3 made of silicon oxide is formed by, for example, thermal oxidation of silicon.
- an electrode layer 4 is formed on the barrier layer 3, and in this embodiment, the electrode layer 4 is formed of platinum oriented in the [111] direction. Have been.
- the electrode layer 4 made of platinum When the electrode layer 4 made of platinum is directly formed on the support substrate 2 formed of a silicon single crystal, silicon dissolves in platinum, invades the electrode layer 4, and causes the laminate according to the present embodiment.
- the electrode layer 4 is formed of the barrier layer 3 made of silicon oxide.
- the laminated unit 1 according to the present embodiment is used as a component of a thin-film capacitor.
- the electrode layer 4 made of platinum is used as a sputtering gas, for example.
- the sputtering method was used to obtain the buffer layer. 4 is formed to a thickness of 100 nm.
- platinum Since platinum has a cubic structure, when the electrode layer 4 made of platinum is formed on the parier layer 3 made of silicon oxide, the platinum is oriented in the most stable [111] direction. .
- a buffer layer 5 made of a dielectric material is included.
- the buffer layer 5 made of a dielectric material containing a bismuth layered compound having the composition represented by B i 4 T i 3.0 2 is formed, for example, by a metal-organic vapor-phase growth (metal-organic) chemical vapor deposition (MOCVD).
- MOCVD metal-organic vapor-phase growth
- the buffer layer 5 made of a dielectric material containing a bismuth layered compound having a composition represented by B i 4 T i 3 0 12 is formed by using a metalorganic chemical vapor deposition method, for example, , B i (CH.) 3 and ⁇ ⁇ Using T i (O—i—C 3 H 7 ) 4 , maintaining the temperature of the parier layer 3 formed by silicon oxide at 550 ° C., having a thickness of 10 nm,
- the buffer layer 5 oriented in the azimuth, that is, in the c-axis direction is formed.
- the buffer layer 5 is formed by epitaxially growing a dielectric material containing a bismuth layer compound on the buffer layer 5, and is surely oriented in the [001] direction, that is, in the c-axis direction. It has a function of ensuring that a dielectric layer 6 made of a dielectric material containing the obtained bismuth layered compound can be formed.
- the laminated unit 1 includes a dielectric layer 6 formed on a buffer layer 5.
- the dielectric layer 6 is formed by a dielectric material containing a bismuth layer compound having excellent capacitor characteristic having a composition represented by S r B i 4 T i 5 .
- the dielectric layer 6 is formed on the buffer layer 5 by metal-organic decomposition (MOD).
- MOD metal-organic decomposition
- a toluene solution of 2-ethylhexanoic acid Sr, a 2-ethylhexanoic acid solution of 2-ethylhexanoic acid Bi, and a toluene solution of 2-ethylhexanoic acid Ti are mixed. 1 mol of 2-ethylhexanoic acid Sr, 4 mol of 2-ethylhexanoic acid Bi force S, and 4 mol of 2-ethylinohexanoic acid Ti were mixed in a stoichiometric ratio, and toluene was mixed.
- the obtained raw material solution is applied onto the buffer layer 5 by spin coating, dried, and calcined under a temperature condition that does not crystallize the obtained dielectric layer 6.
- the same raw material solution is applied onto the pre-fired dielectric layer 6 by spin coating, dried, pre-fired, and this operation is repeated.
- the dielectric layer 6 is fully fired until a dielectric layer 6 having a required thickness, for example, a dielectric layer 6 having a thickness of 100 nm is obtained.
- a series of operations consisting of coating, drying, pre-baking, coating, drying, pre-baking and final firing are repeated.
- the dielectric material containing the bismuth layer compound grows epitaxially, and the dielectric layer 6 oriented in the [001] direction, that is, the c-axis direction is formed.
- the multilayer unit 1 has a structure in which a paria layer 3, an electrode layer 4, a buffer layer 5, and a dielectric layer 6 are stacked on a support substrate 2 made of a silicon single crystal.
- a paria layer 3, an electrode layer 4, a buffer layer 5, and a dielectric layer 6 are stacked on a support substrate 2 made of a silicon single crystal.
- a thin film capacitor can be formed on the support substrate 2 made of silicon single crystal, together with other devices such as a field-effect transistor and a CPU. It is possible to fabricate a semiconductor device by easily incorporating.
- the barrier layer 3 is formed by silicon oxide on the support substrate 2 formed of silicon single crystal, silicon dissolves in the electrode layer 4 and Therefore, it is possible to reliably prevent the layers from being corroded, and thus, when the thin film capacitor is manufactured by using the multilayer unit 1 according to the present embodiment as a component, it is ensured that the thin film capacitor will malfunction. Can be prevented.
- the bismuth layer compound is the [0 0 1] direction position, i.e., formed so as to be oriented in the c-axis direction, on the buffer layer 5, represented by S r B i 4 T i 4 O i 5 Since the dielectric layer 6 is formed by epitaxially growing a dielectric material containing a bismuth layered compound having excellent compositional properties and forming the dielectric layer 6, the bismuth layered compound contained in the dielectric layer 6 can be reliably removed. , [001] direction, that is, c-axis direction.
- the laminate unit 1 includes the dielectric layer 6 formed of the dielectric material including the bismuth layered compound oriented in the [001] direction, that is, the c-axis direction. Even if you have For example, when the upper electrode is provided on the dielectric layer 6 of the multilayer unit 1 according to the present embodiment to produce a thin film capacitor, and a voltage is applied between the electrode layer 5 and the upper electrode, The direction of the electric field almost coincides with the c-axis of the bismuth layered compound contained in the dielectric layer 6, thus suppressing the ferroelectric properties of the bismuth layered compound contained in the dielectric layer 6.
- a semiconductor device can be manufactured by incorporating the semiconductor device into the support substrate 2 made of a single crystal.
- the laminate unit 1 has the dielectric layer 6 formed of a dielectric material containing a bismuth layered compound oriented in the [001] direction, that is, the C-axis direction.
- the dielectric layer 6 containing the bismuth layered compound with improved c-axis orientation has high insulation properties, the dielectric layer 6 can be made thinner, and therefore, the thin film capacitor can be made more compact. It is possible to further reduce the size, and it is possible to further reduce the size of the semiconductor device in which the thin film capacitor is incorporated.
- the buffer layer 5 having a thickness of 10 nm is formed by epitaxially growing a bismuth layered compound having excellent capacitor characteristics on the buffer layer 5 in the [011] direction.
- a dielectric layer 6 containing a bismuth layered compound which is surely oriented in the c-axis direction it is formed by metal-oreanic chemical vapor deposition (MOCVD).
- MOCVD metal-oreanic chemical vapor deposition
- the dielectric layer 6 which is thicker than the buffer layer 5 does not require any layers to be epitaxially grown on it, and the metallization method (metal -Organic decomposition (MOD) is formed so that the manufacturing cost of the laminated unit 1 can be reduced.
- MOCVD metal-oreanic chemical vapor deposition
- the laminate unit 1 is formed by laminating the barrier layer 3, the electrode layer 4, the buffer layer 5, and the dielectric layer 6 in this order on the support substrate 2.
- the laminate unit 1 is further formed by laminating a plurality of unit laminates each including the electrode layer 4, the buffer layer 5, and the dielectric layer 6 on the dielectric layer 6.
- the thin film capacitor may be formed by forming an upper electrode on the dielectric layer 6 of the uppermost unit laminate.
- the electrode layer included in the unit laminate is formed on the dielectric layer. 6, the crystal of the conductive material is epitaxially grown and, when formed, the electrode layer can be oriented in the [001] direction.
- the bismuth layered compound is formed on the electrode layer. It is possible to form a dielectric layer 6 made of a dielectric material containing a bismuth layered compound oriented in the [001] direction by epitaxially growing the dielectric material containing It is not necessary for the laminate to include the buffer layer 5, and a unit laminate can be formed by the electrode layer and the dielectric layer 6. Further, one or more unit laminates composed of the electrode layer and the dielectric layer 6 and a dielectric material including the electrode layer, the buffer layer 5 formed on the electrode layer, and a bismuth layered compound, One or more unit laminates composed of the dielectric layer 6 formed on the buffer layer 5 are laminated on the dielectric layer 6 in any order, and the dielectric of the uppermost unit laminate is laminated. A thin film capacitor may be formed by forming an upper electrode on the body layer 6.
- the support substrate 2 of the laminate unit 1 is formed of silicon single crystal, but it is not always necessary to use the support substrate 2 formed of silicon single crystal.
- the material for forming the semiconductor is not particularly limited as long as it is a material used for fabricating a semiconductor device incorporating various devices.For example, gallium arsenide may be used instead of silicon single crystal.
- the support substrate 2 can also be formed by a crystal or the like.
- the barrier layer 3 is formed on the support substrate 2 by silicon oxide.
- the barrier layer 3 formed on the support substrate 2 is not necessarily formed by silicon oxide.
- the barrier layer 3 may be formed of any material that is not necessary and is capable of preventing the electrode layer 4 formed thereon from being affected by the support substrate 2.
- an aluminum oxide (A 1 2 0 3) and magnesium oxide (Mg o) is preferably Used as the support substrate 2.
- the laminate unit 1 is provided with the electrode layer 4 made of platinum formed on the barrier layer 3.
- the material for forming the electrode layer 4 is not particularly limited, as long as it is a material having conductivity, and is not particularly limited. Instead of platinum (Pt), ruthenium, (Ru), rhodium (Rh ), Palladium (Pd), Iridium (Ir), Gold (Au), Silver (Ag), Copper (Cu), Nickel (Ni) etc.
- N d O, Nb O, O s 0 2 have R hO, I r 0 2, R u 0 2, S rMo O 3, S r R u O 3, C a Ru 0 3, S r VO 3, S r C R_ ⁇ 3, S r C o O 3 , L a N i 0 3, Nb -doped S r T i 0 3 conductive oxide Oyo Pibi mixtures thereof, such as news, B i 2 S r 2 Yes superconducting bismuth layer structure such as C u 0 6 That by using a superconductor, it can also form child the electrode layer 4.
- the electrode layer 4 is formed by a sputtering method, but it is not always necessary to form the electrode layer 4 by a sputtering method, and instead of the sputtering method, a vacuum evaporation method, Liquid phase such as pulsed laser deposition (PLD), metal-organic chemical vapor deposition (MOCVD), metal-organic decomposition (MOD), sol-genole method, etc.
- the electrode layer 4 is formed by other thin film formation methods such as the CSD method. Can also be formed.
- Buffer layer 5 formed of a dielectric material containing a bismuth layered compound excellent in the following.
- the buffer layer 5 can be formed of a material, and further, the buffer layer 5 can be formed of a dielectric material containing another bismuth layered compound having a different constituent element.
- the buffer layer 5 is formed by metal organic chemical vapor deposition (MOCVD) or metal-organic chemical vapor deposition (MOCVD). It is not always necessary to form by the growth method. Vacuum evaporation method, sputtering method, pulsed laser evaporation method (PLD), metal-organic decomposition (MOD) ⁇ The buffer layer 5 can be formed by using another thin film forming method such as a liquid phase method (CSD method).
- a liquid phase method CSS method
- the dielectric layer 6 can also be formed by a dielectric material containing a compound, and further induced by a dielectric material containing another bismuth layered compound having a different constituent element.
- the conductor layer 6 can also be formed.
- the dielectric layer 6 of the laminate unit 1 is formed by a metal-organic decomposition method (MOD). It is not always necessary to form it, but vacuum deposition, sputtering, pulsed laser deposition (PLD), metal-organic chemical vapor deposition (MOCVD), Zonore Gnolet
- MOD metal-organic decomposition method
- PLD pulsed laser deposition
- MOCVD metal-organic chemical vapor deposition
- Zonore Gnolet Zonore Gnolet
- the dielectric layer 6 can be formed by another thin film forming method such as another liquid phase method (CSD method). .
- the laminate unit 1, on the electrode layer 4, the stoichiometric formula, orientation having a composition that is I Table by .LAMBDA.2 3 of B i 4 T i 3 O 1 2
- Buffer layer 5 formed of a dielectric material containing a bismuth layered compound excellent in stiffness
- SrB i 4 T i 4 O ⁇ 5 with ffl 4 in the stoichiometric composition formula
- a dielectric layer 6 formed of a dielectric material containing a bismuth layered compound having a thread composition, wherein the buffer layer 5 and the dielectric layer 6 contain a bismuth layered compound having a different composition. If the buffer layer 5 and the dielectric layer 6 are formed by different thin film forming methods and an interface is formed between the buffer layer 5 and the dielectric layer 6, the buffer layer 5 and dielectric layer 6 have the same composition Bismuth layer-like compound that may contain.
- the multilayer unit 1 is used as a component of the thin film capacitor.
- the multilayer unit 1 is not only a component of the thin film capacitor but also has a high brightness of the inorganic EL element. It can also be used as a laminate unit for emitting light.
- a highly insulating insulating layer is required between the electrode layer 4 and the inorganic EL element, but the c-axis orientation is improved.
- the dielectric layer 6 made of a dielectric material containing the bismuth layered compound has a high insulating property.
- the inorganic EL element is disposed on the dielectric layer 6 and the inorganic EL element is separately placed on the inorganic EL element. Place the electrodes of By applying a voltage between the electrode layer 4 and another electrode, the inorganic EL element can emit light as desired.
- ADVANTAGE OF THE INVENTION According to this invention, it is small and suitable for incorporation into a semiconductor wafer with other devices, such as a field effect transistor (FET) and CPU (Central Processing Unit), and has excellent large-capacity dielectric characteristics. It is possible to provide a laminate unit including an electrode layer and a dielectric layer that can constitute a thin film capacitor.
- FET field effect transistor
- CPU Central Processing Unit
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Description
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WO2010084711A1 (ja) * | 2009-01-20 | 2010-07-29 | パナソニック株式会社 | 圧電体薄膜とその製造方法、インクジェットヘッド、インクジェットヘッドを用いて画像を形成する方法、角速度センサ、角速度センサを用いて角速度を測定する方法、圧電発電素子ならびに圧電発電素子を用いた発電方法 |
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KR20050108368A (ko) * | 2003-02-27 | 2005-11-16 | 티디케이가부시기가이샤 | 고유전율 절연막, 박막 용량 소자, 박막 적층 콘덴서 및박막 용량 소자의 제조 방법 |
KR20050100700A (ko) * | 2003-02-27 | 2005-10-19 | 티디케이가부시기가이샤 | 박막용량소자 및 그것을 포함한 전자회로 및 전자기기 |
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Also Published As
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JPWO2004077562A1 (ja) | 2006-06-08 |
US20040166357A1 (en) | 2004-08-26 |
US6891714B2 (en) | 2005-05-10 |
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