JP6456971B2 - 気相の前駆体を用いて有機金属構造体薄膜を製造する方法 - Google Patents
気相の前駆体を用いて有機金属構造体薄膜を製造する方法 Download PDFInfo
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- JP6456971B2 JP6456971B2 JP2016558630A JP2016558630A JP6456971B2 JP 6456971 B2 JP6456971 B2 JP 6456971B2 JP 2016558630 A JP2016558630 A JP 2016558630A JP 2016558630 A JP2016558630 A JP 2016558630A JP 6456971 B2 JP6456971 B2 JP 6456971B2
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- 239000002243 precursor Substances 0.000 title claims description 40
- 238000004519 manufacturing process Methods 0.000 title claims description 29
- 125000002524 organometallic group Chemical group 0.000 title claims description 11
- 239000010409 thin film Substances 0.000 title description 6
- 239000012808 vapor phase Substances 0.000 title description 2
- 239000000758 substrate Substances 0.000 claims description 118
- 239000012923 MOF film Substances 0.000 claims description 116
- 238000000034 method Methods 0.000 claims description 79
- 238000006243 chemical reaction Methods 0.000 claims description 76
- 150000004706 metal oxides Chemical class 0.000 claims description 74
- 229910044991 metal oxide Inorganic materials 0.000 claims description 73
- 239000013110 organic ligand Substances 0.000 claims description 55
- 150000002902 organometallic compounds Chemical class 0.000 claims description 40
- 238000010926 purge Methods 0.000 claims description 40
- 239000010408 film Substances 0.000 claims description 33
- 238000000231 atomic layer deposition Methods 0.000 claims description 32
- 125000004122 cyclic group Chemical group 0.000 claims description 31
- 230000008569 process Effects 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 24
- 239000003989 dielectric material Substances 0.000 claims description 21
- 238000000151 deposition Methods 0.000 claims description 19
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims description 16
- 229910021645 metal ion Inorganic materials 0.000 claims description 13
- 239000007800 oxidant agent Substances 0.000 claims description 9
- 230000001590 oxidative effect Effects 0.000 claims description 7
- 229910052796 boron Inorganic materials 0.000 claims description 5
- 229910052793 cadmium Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052735 hafnium Inorganic materials 0.000 claims description 4
- 229910052738 indium Inorganic materials 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 239000002052 molecular layer Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- 239000003446 ligand Substances 0.000 claims description 2
- 229910052753 mercury Inorganic materials 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims 2
- 239000010410 layer Substances 0.000 description 74
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 53
- 239000007789 gas Substances 0.000 description 26
- 239000011787 zinc oxide Substances 0.000 description 25
- 229910052751 metal Chemical class 0.000 description 22
- 239000002184 metal Chemical class 0.000 description 22
- 239000012621 metal-organic framework Substances 0.000 description 22
- 239000013154 zeolitic imidazolate framework-8 Substances 0.000 description 19
- MFLKDEMTKSVIBK-UHFFFAOYSA-N zinc;2-methylimidazol-3-ide Chemical compound [Zn+2].CC1=NC=C[N-]1.CC1=NC=C[N-]1 MFLKDEMTKSVIBK-UHFFFAOYSA-N 0.000 description 19
- 239000012790 adhesive layer Substances 0.000 description 16
- 229910004298 SiO 2 Inorganic materials 0.000 description 15
- 239000012071 phase Substances 0.000 description 15
- 229910010413 TiO 2 Inorganic materials 0.000 description 14
- 230000008021 deposition Effects 0.000 description 10
- 239000002070 nanowire Substances 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 8
- 239000007790 solid phase Substances 0.000 description 8
- 239000002904 solvent Substances 0.000 description 8
- 239000012920 MOF membrane Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 239000013251 zeolitic imidazolate framework-71 Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000012212 insulator Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical compound CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000005240 physical vapour deposition Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- 238000007740 vapor deposition Methods 0.000 description 4
- 238000005019 vapor deposition process Methods 0.000 description 4
- 238000001947 vapour-phase growth Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000004070 electrodeposition Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 150000002391 heterocyclic compounds Chemical class 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- 239000013153 zeolitic imidazolate framework Substances 0.000 description 3
- 125000004105 2-pyridyl group Chemical group N1=C([*])C([H])=C([H])C([H])=C1[H] 0.000 description 2
- QAJJXHRQPLATMK-UHFFFAOYSA-N 4,5-dichloro-1h-imidazole Chemical compound ClC=1N=CNC=1Cl QAJJXHRQPLATMK-UHFFFAOYSA-N 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
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- MCTWTZJPVLRJOU-UHFFFAOYSA-N 1-methyl-1H-imidazole Chemical compound CN1C=CN=C1 MCTWTZJPVLRJOU-UHFFFAOYSA-N 0.000 description 1
- WOFXUCJTFGKKIF-UHFFFAOYSA-N 2-[3-(4-pyridyl)-1H-1,2,4-triazol-5-yl]pyridine Chemical compound N1=CC=CC=C1C1=NC(C=2C=CN=CC=2)=NN1 WOFXUCJTFGKKIF-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000000333 X-ray scattering Methods 0.000 description 1
- -1 and in FIG. 6B Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 125000002883 imidazolyl group Chemical group 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000010416 ion conductor Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- WRHZVMBBRYBTKZ-UHFFFAOYSA-N pyrrole-2-carboxylic acid Chemical group OC(=O)C1=CC=CN1 WRHZVMBBRYBTKZ-UHFFFAOYSA-N 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C23C16/4401—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber
- C23C16/4408—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber by purging residual gases from the reaction chamber or gas lines
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
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- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
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- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45527—Atomic layer deposition [ALD] characterized by the ALD cycle, e.g. different flows or temperatures during half-reactions, unusual pulsing sequence, use of precursor mixtures or auxiliary reactants or activations
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
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- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
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- C23C16/45536—Use of plasma, radiation or electromagnetic fields
- C23C16/4554—Plasma being used non-continuously in between ALD reactions
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- H—ELECTRICITY
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
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- H01L21/02107—Forming insulating materials on a substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
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- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H01L21/0228—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition deposition by cyclic CVD, e.g. ALD, ALE, pulsed CVD
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Description
本発明の実施形態に係る方法によれば、前駆体を気相で供給することによりMOF膜を製造できる。さらに、この方法によれば自己制御膜成長を行うことができ、これにより、厚さを1nm以上250nm以下としても、均質なピンホールフリーのMOF膜を得ることができる。こうしたMOF膜を製造する方法は、半導体の製造に特に好適である。多孔質構造を有すること、および、誘電率が低いことから、バックエンドオブライン(BEOL)における絶縁体間材料または絶縁体内材料として、MOF膜を利用できる。BEOLでは、絶縁体間材料または絶縁体内材料の誘電率は、RC(抵抗−静電容量)遅延を低減させるように、好ましくはSiO2の誘電率(4.0)よりも低い。
Claims (13)
- 基板(610)の上に有機金属構造体(MOF)膜(620)を製造する方法であって、
主面(630)を有する基板(610)を準備する工程と、
有機金属化合物を構成するように選択された有機金属化合物前駆体と、少なくとも1つの有機リガンドとを用いて、前記主面の上にMOF膜(620)を形成する工程とを含み、
前記有機金属化合物前駆体と前記少なくとも1つの有機リガンドは、それぞれ気相で提供し、
前記MOF膜を形成する工程は、少なくとも、循環反応シーケンスを所定の第1サイクル数、繰り返すことを含み、
前記主面を前記有機金属化合物前駆体に曝露することにより前記循環反応シーケンスを開始し、これにより前記曝露された主面の上に前記有機金属化合物を堆積させる工程をさらに含み、
前記循環反応シーケンスにより前記有機金属化合物を堆積させる工程では、分子層堆積法(MLD)を用い、
前記循環反応シーケンスは、
第1パージ工程を実施する工程と、
前記露出した主面を前記少なくとも1つの有機リガンドに曝露する工程と、
第2パージ工程を実施する工程とを含む、
方法。 - 基板(610)の上に有機金属構造体(MOF)膜(620)を製造する方法であって、
主面(630)を有する基板(610)を準備する工程と、
有機金属化合物を構成するように選択された有機金属化合物前駆体と、少なくとも1つの有機リガンドとを用いて、前記主面の上にMOF膜(620)を形成する工程とを含み、
前記有機金属化合物前駆体と前記少なくとも1つの有機リガンドは、それぞれ気相で提供し、
前記MOF膜を形成する工程は、少なくとも、循環反応シーケンスを所定の第1サイクル数、繰り返すことを含み、
前記主面を前記有機金属化合物前駆体に曝露することにより前記循環反応シーケンスを開始し、これにより前記曝露された主面の上に前記有機金属化合物を堆積させる工程をさらに含み、
前記循環反応シーケンスは、原子層堆積法(ALD)を用いて行われ、
前記循環反応シーケンスは、
第1パージ工程を実施する工程と、
前記露出した主面を酸化剤に曝露し、これにより前記基板の上に金属酸化物を形成する工程と、
第2パージ工程を実施することとを含み、
前記金属酸化物を前記少なくとも1つの有機リガンドに所定時間、曝露する工程をさらに含み、該曝露する工程は、固相−気相シングル成長プロセスを実施し、これにより前記金属酸化物を少なくとも部分的に前記MOF膜に転化させることを含む、
方法。 - 前記主面(630)は、誘電体材料のコンフォーマル層(640)で覆われている、
請求項1または2に記載の方法。 - 前記所定の第1サイクル数は、1以上100以下であり、好ましくは1以上20以下であり、より好ましくは1以上15以下であり、さらに好ましくは1以上5以下である、
請求項1または2に記載の方法。 - 前記所定時間は、前記金属酸化物を前記MOF膜に完全転化させる長さとされる、
請求項2に記載の方法。 - 前記所定時間は、前記金属酸化物を部分的にのみ前記MOF膜に転化させる長さとされる、
請求項2に記載の方法。 - 前記金属酸化物はZnOである、
請求項2、5および6のいずれか1項に記載の方法。 - 前記金属酸化物を形成し、続いて前記金属酸化物を前記少なくとも1つの有機リガンドに曝露する循環反応シーケンスを所定の第2サイクル数繰り返す、
請求項2に記載の方法。 - 前記有機金属化合物前駆体は、Zn、Fe、In、Co、Cu、Mn、Li、B、Cd、HgおよびPrから成る群から選択される金属イオンまたは金属イオンのクラスタを含む、
請求項1から8のいずれか1項に記載の方法。 - 前記群は、さらに、Mg、Al、Zr、Hf、TiおよびTaを含む、
請求項9に記載の方法。 - 前記少なくとも1つの有機リガンドは、アゾール系リガンドである、
請求項1から10のいずれか1項に記載の方法。 - 主面(630)を有する基板(610)と、
前記主面(630)の上に設けられたMOF膜(620)とを備え、
前記MOF膜(620)は、厚さが1nm以上250nm以下であり、ピンホールフリーであり、
MOF膜から成る複数の層と、屈折率が1.4より大きい材料から成る層と、で構成されたスタックをさらに備え、
前記MOF膜を構成する各層は、前記屈折率が1.4より大きい材料から成る層の各層と交互に配置されている、
基板構造体(600)。 - 前記主面(630)は、誘電体材料のコンフォーマル層(640)で覆われている、
請求項12に記載の基板構造体。
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