JP6851814B2 - トランジスタ - Google Patents
トランジスタ Download PDFInfo
- Publication number
- JP6851814B2 JP6851814B2 JP2016250639A JP2016250639A JP6851814B2 JP 6851814 B2 JP6851814 B2 JP 6851814B2 JP 2016250639 A JP2016250639 A JP 2016250639A JP 2016250639 A JP2016250639 A JP 2016250639A JP 6851814 B2 JP6851814 B2 JP 6851814B2
- Authority
- JP
- Japan
- Prior art keywords
- insulator
- oxide
- transistor
- conductor
- oxygen
- 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.)
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- 239000012212 insulator Substances 0.000 claims description 463
- 239000004065 semiconductor Substances 0.000 claims description 319
- 239000004020 conductor Substances 0.000 claims description 292
- 239000001301 oxygen Substances 0.000 claims description 151
- 229910052760 oxygen Inorganic materials 0.000 claims description 151
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 148
- 230000006870 function Effects 0.000 claims description 103
- 230000004888 barrier function Effects 0.000 claims description 38
- 229910052721 tungsten Inorganic materials 0.000 claims description 37
- 239000010937 tungsten Substances 0.000 claims description 37
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical group [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 35
- 238000004458 analytical method Methods 0.000 claims description 17
- 238000003795 desorption Methods 0.000 claims description 5
- 239000010408 film Substances 0.000 description 211
- 239000010410 layer Substances 0.000 description 99
- 238000000034 method Methods 0.000 description 81
- 239000011701 zinc Substances 0.000 description 81
- 239000013078 crystal Substances 0.000 description 74
- 229910052739 hydrogen Inorganic materials 0.000 description 65
- 239000001257 hydrogen Substances 0.000 description 64
- 239000000463 material Substances 0.000 description 56
- 238000012360 testing method Methods 0.000 description 54
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 53
- 210000004027 cell Anatomy 0.000 description 53
- 239000000758 substrate Substances 0.000 description 49
- 229910052814 silicon oxide Inorganic materials 0.000 description 42
- 239000007789 gas Substances 0.000 description 40
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 34
- 239000012535 impurity Substances 0.000 description 32
- 239000004973 liquid crystal related substance Substances 0.000 description 32
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 31
- 238000003860 storage Methods 0.000 description 31
- 239000000523 sample Substances 0.000 description 29
- 229910052581 Si3N4 Inorganic materials 0.000 description 27
- 125000004429 atom Chemical group 0.000 description 26
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 24
- 239000000203 mixture Substances 0.000 description 24
- 230000015572 biosynthetic process Effects 0.000 description 23
- 238000010438 heat treatment Methods 0.000 description 23
- 238000004519 manufacturing process Methods 0.000 description 23
- 238000004544 sputter deposition Methods 0.000 description 23
- 230000007547 defect Effects 0.000 description 22
- 229910052738 indium Inorganic materials 0.000 description 22
- -1 silicon oxide nitride Chemical class 0.000 description 22
- 239000012298 atmosphere Substances 0.000 description 20
- 229910052782 aluminium Inorganic materials 0.000 description 19
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 19
- 239000008188 pellet Substances 0.000 description 19
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 18
- 230000015654 memory Effects 0.000 description 18
- 229910052751 metal Inorganic materials 0.000 description 18
- 230000008569 process Effects 0.000 description 18
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- 239000010703 silicon Substances 0.000 description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 17
- 238000010586 diagram Methods 0.000 description 17
- 239000002184 metal Substances 0.000 description 17
- 229910052725 zinc Inorganic materials 0.000 description 17
- 206010021143 Hypoxia Diseases 0.000 description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 15
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 14
- 229910052719 titanium Inorganic materials 0.000 description 14
- 239000010936 titanium Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 229910001868 water Inorganic materials 0.000 description 14
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 13
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 13
- 239000010949 copper Substances 0.000 description 13
- 229910000449 hafnium oxide Inorganic materials 0.000 description 13
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 13
- 229910052750 molybdenum Inorganic materials 0.000 description 13
- 239000011733 molybdenum Substances 0.000 description 13
- 238000002173 high-resolution transmission electron microscopy Methods 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 11
- 238000000231 atomic layer deposition Methods 0.000 description 11
- 229910052802 copper Inorganic materials 0.000 description 11
- 229910044991 metal oxide Inorganic materials 0.000 description 11
- 150000004706 metal oxides Chemical class 0.000 description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 238000003917 TEM image Methods 0.000 description 10
- 238000010894 electron beam technology Methods 0.000 description 10
- 150000002431 hydrogen Chemical class 0.000 description 10
- 235000012431 wafers Nutrition 0.000 description 10
- 229910052786 argon Inorganic materials 0.000 description 9
- 230000008859 change Effects 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 9
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 8
- 229910002601 GaN Inorganic materials 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 8
- 239000002159 nanocrystal Substances 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 8
- 238000000926 separation method Methods 0.000 description 8
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 8
- 229910001882 dioxygen Inorganic materials 0.000 description 7
- 229910052733 gallium Inorganic materials 0.000 description 7
- 239000012528 membrane Substances 0.000 description 7
- 239000007769 metal material Substances 0.000 description 7
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 7
- 239000002356 single layer Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 6
- 238000002524 electron diffraction data Methods 0.000 description 6
- 238000005530 etching Methods 0.000 description 6
- 229910021389 graphene Inorganic materials 0.000 description 6
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 6
- 150000004767 nitrides Chemical class 0.000 description 6
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 6
- 125000004430 oxygen atom Chemical group O* 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 229910052715 tantalum Inorganic materials 0.000 description 6
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 6
- 229910001930 tungsten oxide Inorganic materials 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- 229910052783 alkali metal Inorganic materials 0.000 description 5
- 150000001340 alkali metals Chemical class 0.000 description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 5
- 150000001342 alkaline earth metals Chemical class 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 229910052796 boron Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000005669 field effect Effects 0.000 description 5
- 229910003437 indium oxide Inorganic materials 0.000 description 5
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 5
- 239000011261 inert gas Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 5
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 5
- 238000012916 structural analysis Methods 0.000 description 5
- 229910001936 tantalum oxide Inorganic materials 0.000 description 5
- 229910052727 yttrium Inorganic materials 0.000 description 5
- 229910001928 zirconium oxide Inorganic materials 0.000 description 5
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 4
- 229910052779 Neodymium Inorganic materials 0.000 description 4
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 230000001186 cumulative effect Effects 0.000 description 4
- 230000005264 electron capture Effects 0.000 description 4
- 229910052732 germanium Inorganic materials 0.000 description 4
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 229910052735 hafnium Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 4
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
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- 238000001004 secondary ion mass spectrometry Methods 0.000 description 4
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- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 4
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- 235000014676 Phragmites communis Nutrition 0.000 description 3
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 230000004075 alteration Effects 0.000 description 3
- GPBUGPUPKAGMDK-UHFFFAOYSA-N azanylidynemolybdenum Chemical compound [Mo]#N GPBUGPUPKAGMDK-UHFFFAOYSA-N 0.000 description 3
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- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 3
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- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 2
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- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
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- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 2
- 125000005595 acetylacetonate group Chemical group 0.000 description 2
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- 229910000416 bismuth oxide Inorganic materials 0.000 description 2
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- 239000003990 capacitor Substances 0.000 description 2
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 2
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- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 2
- HQWPLXHWEZZGKY-UHFFFAOYSA-N diethylzinc Chemical compound CC[Zn]CC HQWPLXHWEZZGKY-UHFFFAOYSA-N 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
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- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 2
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- 239000000976 ink Substances 0.000 description 2
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- 229910052746 lanthanum Inorganic materials 0.000 description 2
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- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
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- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 2
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- ZVYYAYJIGYODSD-LNTINUHCSA-K (z)-4-bis[[(z)-4-oxopent-2-en-2-yl]oxy]gallanyloxypent-3-en-2-one Chemical compound [Ga+3].C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O ZVYYAYJIGYODSD-LNTINUHCSA-K 0.000 description 1
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
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- FIPWRIJSWJWJAI-UHFFFAOYSA-N Butyl carbitol 6-propylpiperonyl ether Chemical compound C1=C(CCC)C(COCCOCCOCCCC)=CC2=C1OCO2 FIPWRIJSWJWJAI-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
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- H01L27/1225—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or crystalline structure of the active layer with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
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Description
本実施の形態では、半導体装置の一形態を、図1乃至図6、および図7を用いて説明する。
本発明の一態様の半導体装置(記憶装置)の一例を図1乃至図6、および図7に示す。なお、図7(A)は、図1乃至図6を回路図で表したものである。
図1乃至図6、および図7(A)に示す半導体装置は、トランジスタ300と、トランジスタ200、および容量素子100を有している。
図7(B)に示す半導体装置は、トランジスタ300を有さない点で図7(A)に示した半導体装置と異なる。この場合も図7(A)に示した半導体装置と同様の動作により情報の書き込みおよび保持動作が可能である。
本発明の一態様の半導体装置は、図1に示すようにトランジスタ300、トランジスタ200、容量素子100を有する。トランジスタ200はトランジスタ300の上方に設けられ、容量素子100はトランジスタ300、およびトランジスタ200の上方に設けられている。
本実施の形態では、半導体装置の一形態を、図8乃至図12を用いて説明する。
以下では、本発明の一態様に係るトランジスタの一例について説明する。図8(A)、図8(B)、および図8(C)は、本発明の一態様に係るトランジスタの上面図および断面図である。図8(A)は上面図であり、図8(B)は、図8(A)に示す一点鎖線X1−X2、図8(C)は、一点鎖線Y1−Y2に対応する断面図である。なお、図8(A)の上面図では、図の明瞭化のために一部の要素を省いて図示している。
図9(A)は、図3に示すトランジスタ200Aの上面を示す。なお、図の明瞭化のため、図9(A)において一部の膜は省略されている。また、図9(B)は、図9(A)に示す一点鎖線X1−X2に対応する断面図であり、図9(C)はY1−Y2に対応する断面図である。
図10には、図1等に示すトランジスタ200に適用できる構造の一例を示す。図10(A)はトランジスタ200Dの上面を示す。なお、図の明瞭化のため、図10(A)において一部の膜は省略されている。また、図10(B)は、図10(A)に示す一点鎖線X1−X2に対応する断面図であり、図10(C)はY1−Y2に対応する断面図である。
図11には、図1等に示すトランジスタ200に適用できる構造の一例を示す。図11(A)はトランジスタ200Eの上面を示す。なお、図の明瞭化のため、図11(A)において一部の膜は省略されている。また、図11(B)は、図11(A)に示す一点鎖線X1−X2に対応する断面図であり、図11(C)はY1−Y2に対応する断面図である。
図12は、図1等に示すトランジスタ200に適用できる構造の一例を示す。図12(A)はトランジスタ200Fの上面を示す。なお、図の明瞭化のため、図12(A)において一部の膜は省略されている。また、図12(B)は、図12(A)に示す一点鎖線X1−X2に対応する断面図であり、図12(C)はY1−Y2に対応する断面図である。
本実施の形態では、上記構成例で示したトランジスタの作製方法の一例について、図16乃至図19を用いて説明する。
図8に示すトランジスタ200の作製方法について、以下より説明する。具体的には、図1における絶縁体212が形成された状態から、絶縁体282が形成されるまでにおける、トランジスタ200を含む領域の作製工程について説明する。なお、図16乃至図19に示す断面図は、図8(A)に示す一点鎖線X1−X2および一点鎖線Y1−Y2に対応している。
本実施の形態においては、先の実施の形態で例示したトランジスタが有する酸化物半導体について、図20乃至図24を用いて以下説明を行う。
酸化物半導体は、単結晶酸化物半導体と、それ以外の非単結晶酸化物半導体と、に分けられる。非単結晶酸化物半導体としては、CAAC−OS(c−axis−aligned crystalline oxide semiconductor)、多結晶酸化物半導体、nc−OS(nanocrystalline oxide semiconductor)、擬似非晶質酸化物半導体(a−like OS:amorphous−like oxide semiconductor)および非晶質酸化物半導体などがある。
まずは、CAAC−OSについて説明する。
次に、nc−OSについて説明する。
a−like OSは、nc−OSと非晶質酸化物半導体との間の構造を有する酸化物半導体である。
次に、酸化物半導体のキャリア密度について、以下に説明を行う。
本実施の形態においては、本発明の一態様に係るトランジスタや上述した記憶装置などを含むCPUの一例について説明する。
図25に示す半導体装置400は、CPUコア401、パワーマネージメントユニット421および周辺回路422を有する。パワーマネージメントユニット421は、パワーコントローラ402、およびパワースイッチ403を有する。周辺回路422は、キャッシュメモリを有するキャッシュ404、バスインターフェース(BUS I/F)405、及びデバッグインターフェース(Debug I/F)406を有する。CPUコア401は、データバス423、制御装置407、PC(プログラムカウンタ)408、パイプラインレジスタ409、パイプラインレジスタ410、ALU(Arithmetic logic unit)411、及びレジスタファイル412を有する。CPUコア401と、キャッシュ404等の周辺回路422とのデータのやり取りは、データバス423を介して行われる。
本実施の形態においては、本発明の一態様に係る半導体装置を含む半導体ウエハ、チップおよび当該チップを適用した電子部品について、図27および図28を用いて説明する。
図27(A)は、ダイシング処理が行なわれる前の基板1711の上面図を示している。基板1711としては、例えば、半導体基板(「半導体ウエハ」ともいう。)を用いることができる。基板1711上には、複数の回路領域1712が設けられている。回路領域1712には、本発明の一態様に係る半導体装置や、CPU、RFタグ、またはイメージセンサなどを設けることができる。
チップ1715を電子部品に適用する例について、図28を用いて説明する。なお、電子部品は、半導体パッケージ、またはIC用パッケージともいう。電子部品は、端子取り出し方向や、端子の形状に応じて、複数の規格や名称が存在する。
本実施の形態においては、本発明の一態様に係るトランジスタなどを利用した表示装置について、図29および図30を用いて説明する。
表示装置に用いられる表示素子としては液晶素子(液晶表示素子ともいう。)、発光素子(発光表示素子ともいう。)などを用いることができる。発光素子は、電流または電圧によって輝度が制御される素子をその範疇に含んでおり、具体的には無機EL(Electroluminescence)、有機ELなどを含む。以下では、表示装置の一例としてEL素子を用いた表示装置(EL表示装置)および液晶素子を用いた表示装置(液晶表示装置)について説明する。
本実施の形態においては、本発明の一態様に係るトランジスタなどを利用した電子機器について説明する。
本発明の一態様に係る半導体装置は、表示機器、パーソナルコンピュータ、記録媒体を備えた画像再生装置(代表的にはDVD:Digital Versatile Disc等の記録媒体を再生し、その画像を表示しうるディスプレイを有する装置)に用いることができる。その他に、本発明の一態様に係る半導体装置を用いることができる電子機器として、携帯電話、携帯型を含むゲーム機、携帯データ端末、電子書籍端末、ビデオカメラ、デジタルスチルカメラ等のカメラ、ゴーグル型ディスプレイ(ヘッドマウントディスプレイ)、ナビゲーションシステム、音響再生装置(カーオーディオ、デジタルオーディオプレイヤー等)、複写機、ファクシミリ、プリンタ、プリンタ複合機、現金自動預け入れ払い機(ATM)、自動販売機などが挙げられる。これら電子機器の具体例を図31に示す。
Claims (1)
- 第1の導電体上の第1の絶縁体と、
前記第1の絶縁体上の第2の絶縁体と、
前記第2の絶縁体上の第3の絶縁体と、
前記第3の絶縁体上の第1の酸化物と、
前記第1の酸化物上の酸化物半導体と、
前記酸化物半導体上の第2の導電体と、
前記第3の絶縁体上、前記第1の酸化物上、前記酸化物半導体上および前記第2の導電体上の第2の酸化物と、
前記第2の酸化物上の第4の絶縁体と、
前記第4の絶縁体上の第3の導電体と、
前記第3の導電体上の第4の導電体と、
前記第4の絶縁体上、前記第3の導電体上および前記第4の導電体上の第5の絶縁体と、
前記第2の酸化物上、前記第4の絶縁体上および前記第5の絶縁体上の第6の絶縁体と、を有し、
前記第2の酸化物は、前記第3の絶縁体と接する領域を有し、
前記第5の絶縁体は、前記第4の絶縁体と接する領域を有し、
前記第1の導電体は、第2のゲート電極として機能を有する領域を有し、
前記第2の導電体は、ソースまたはドレインとして機能する領域を有し、
前記第2の導電体は、TDS分析により、50℃から500℃の範囲において、酸素原子に換算した酸素の脱離量が、3.4×10 15 atoms/cm 2 以下のタングステンであり、
前記第4の絶縁体は、ゲート絶縁膜として機能する領域を有し、
前記第3の導電体および前記第4の導電体の各々は、第1のゲート電極として機能する領域を有し、
前記第2の導電体は、前記第2の酸化物によって前記第6の絶縁体と離間し、
前記第3の導電体および前記第4の導電体の各々は、前記第5の絶縁体によって前記第6の絶縁体と離間し、
前記第1の絶縁体、前記第3の絶縁体、前記第4の絶縁体および前記第6の絶縁体の各々は、酸素を含み、
前記第5の絶縁体は、酸素に対してバリア性を有する、トランジスタ。
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