JP7196291B2 - タングステン膜又はモリブデン膜を堆積させるための方法 - Google Patents
タングステン膜又はモリブデン膜を堆積させるための方法 Download PDFInfo
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- JP7196291B2 JP7196291B2 JP2021519582A JP2021519582A JP7196291B2 JP 7196291 B2 JP7196291 B2 JP 7196291B2 JP 2021519582 A JP2021519582 A JP 2021519582A JP 2021519582 A JP2021519582 A JP 2021519582A JP 7196291 B2 JP7196291 B2 JP 7196291B2
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- 238000000151 deposition Methods 0.000 title claims description 144
- 238000000034 method Methods 0.000 title claims description 96
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 title claims description 45
- 229910052750 molybdenum Inorganic materials 0.000 title claims description 43
- 239000011733 molybdenum Substances 0.000 title claims description 43
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims description 43
- 229910052721 tungsten Inorganic materials 0.000 title claims description 42
- 239000010937 tungsten Substances 0.000 title claims description 42
- 229910052751 metal Inorganic materials 0.000 claims description 145
- 239000002184 metal Substances 0.000 claims description 144
- 239000002243 precursor Substances 0.000 claims description 141
- 230000008021 deposition Effects 0.000 claims description 113
- 239000000758 substrate Substances 0.000 claims description 79
- 239000007800 oxidant agent Substances 0.000 claims description 77
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 72
- 229910052799 carbon Inorganic materials 0.000 claims description 72
- 230000001590 oxidative effect Effects 0.000 claims description 52
- 239000007789 gas Substances 0.000 claims description 50
- 239000000376 reactant Substances 0.000 claims description 39
- 125000002524 organometallic group Chemical group 0.000 claims description 34
- 238000005229 chemical vapour deposition Methods 0.000 claims description 18
- 238000000231 atomic layer deposition Methods 0.000 claims description 16
- 239000000356 contaminant Substances 0.000 claims description 16
- 239000003446 ligand Substances 0.000 claims description 15
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 6
- 125000003118 aryl group Chemical group 0.000 claims description 4
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 4
- 125000000058 cyclopentadienyl group Chemical group C1(=CC=CC1)* 0.000 claims description 3
- ZSWFCLXCOIISFI-UHFFFAOYSA-N endo-cyclopentadiene Natural products C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 claims description 2
- 238000010926 purge Methods 0.000 description 28
- 239000010408 film Substances 0.000 description 26
- 238000005137 deposition process Methods 0.000 description 22
- 239000012159 carrier gas Substances 0.000 description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 17
- 239000001301 oxygen Substances 0.000 description 17
- 229910052760 oxygen Inorganic materials 0.000 description 17
- 238000007740 vapor deposition Methods 0.000 description 17
- 239000000463 material Substances 0.000 description 16
- 238000004377 microelectronic Methods 0.000 description 15
- 239000012530 fluid Substances 0.000 description 13
- 230000006870 function Effects 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 239000001257 hydrogen Substances 0.000 description 9
- 229910052739 hydrogen Inorganic materials 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000003491 array Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000005019 vapor deposition process Methods 0.000 description 4
- 235000012431 wafers Nutrition 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- QIJNJJZPYXGIQM-UHFFFAOYSA-N 1lambda4,2lambda4-dimolybdacyclopropa-1,2,3-triene Chemical compound [Mo]=C=[Mo] QIJNJJZPYXGIQM-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 229910039444 MoC Inorganic materials 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- -1 alkylamide groups Chemical group 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- FQNHWXHRAUXLFU-UHFFFAOYSA-N carbon monoxide;tungsten Chemical group [W].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-] FQNHWXHRAUXLFU-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000015654 memory Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000013110 organic ligand Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- NXHILIPIEUBEPD-UHFFFAOYSA-H tungsten hexafluoride Chemical compound F[W](F)(F)(F)(F)F NXHILIPIEUBEPD-UHFFFAOYSA-H 0.000 description 2
- 238000004876 x-ray fluorescence Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910015686 MoOCl4 Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000003282 alkyl amino group Chemical group 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 239000012707 chemical precursor Substances 0.000 description 1
- CNRRZWMERIANGJ-UHFFFAOYSA-N chloro hypochlorite;molybdenum Chemical compound [Mo].ClOCl CNRRZWMERIANGJ-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- RCJVRSBWZCNNQT-UHFFFAOYSA-N dichloridooxygen Chemical compound ClOCl RCJVRSBWZCNNQT-UHFFFAOYSA-N 0.000 description 1
- ASLHVQCNFUOEEN-UHFFFAOYSA-N dioxomolybdenum;dihydrochloride Chemical compound Cl.Cl.O=[Mo]=O ASLHVQCNFUOEEN-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- CNEOGBIICRAWOH-UHFFFAOYSA-N methane;molybdenum Chemical compound C.[Mo] CNEOGBIICRAWOH-UHFFFAOYSA-N 0.000 description 1
- JAGQSESDQXCFCH-UHFFFAOYSA-N methane;molybdenum Chemical compound C.[Mo].[Mo] JAGQSESDQXCFCH-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- GICWIDZXWJGTCI-UHFFFAOYSA-I molybdenum pentachloride Chemical compound Cl[Mo](Cl)(Cl)(Cl)Cl GICWIDZXWJGTCI-UHFFFAOYSA-I 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- SFPKXFFNQYDGAH-UHFFFAOYSA-N oxomolybdenum;tetrahydrochloride Chemical compound Cl.Cl.Cl.Cl.[Mo]=O SFPKXFFNQYDGAH-UHFFFAOYSA-N 0.000 description 1
- QHIRVZBLPRTQQO-UHFFFAOYSA-I pentafluorotungsten Chemical compound F[W](F)(F)(F)F QHIRVZBLPRTQQO-UHFFFAOYSA-I 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000000547 substituted alkyl group Chemical group 0.000 description 1
- 125000003107 substituted aryl group Chemical group 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- KPGXUAIFQMJJFB-UHFFFAOYSA-H tungsten hexachloride Chemical compound Cl[W](Cl)(Cl)(Cl)(Cl)Cl KPGXUAIFQMJJFB-UHFFFAOYSA-H 0.000 description 1
- WIDQNNDDTXUPAN-UHFFFAOYSA-I tungsten(v) chloride Chemical compound Cl[W](Cl)(Cl)(Cl)Cl WIDQNNDDTXUPAN-UHFFFAOYSA-I 0.000 description 1
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- 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
- C23C16/45523—Pulsed gas flow or change of composition over time
- 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
- C23C16/45534—Use of auxiliary reactants other than used for contributing to the composition of the main film, e.g. catalysts, activators or scavengers
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/28556—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table by chemical means, e.g. CVD, LPCVD, PECVD, laser CVD
- H01L21/28562—Selective deposition
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- 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
- C23C16/06—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 metallic material
- C23C16/18—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 metallic material from metallo-organic compounds
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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
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
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- 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
- C23C16/56—After-treatment
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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
- H01L21/02225—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
- 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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- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/28556—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table by chemical means, e.g. CVD, LPCVD, PECVD, laser CVD
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/28568—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table the conductive layers comprising transition metals
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- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
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Description
Mo2Cを堆積させるが、良好なステップカバレージを有する低温及び他の条件で、パルス化された酸素を伴う継続的なCVDを使用。図2及び表1から4を参照のこと。
(EtBz)2Mo+H2(時間制限厚さ<50Å)/(EtBz)2Mo+O2:H2<50%
シリーズ:
(EtBz)2Mo+不活性/不活性パージ/(O2/H2)/不活性パージ
酸素(O2)の投与をMoの表面酸化に限定する。
水素(H2)の投与は、表面から実質的にすべての酸素を除去するのに充分である。
シリーズ:
Moイミド-アミド/不活性パージ/(H2O+H2)/任意選択的なH2/不活性パージ
表1から4は、実施例1として概して記載されているパルス化されたCVD法を使用して実施される本発明の方法のさまざまな処理条件及びパラメータの評価のデータを含有する。表中、堆積された膜の厚さ(例えばXRF Mo)又は堆積された膜の炭素含有量(XRF C)をx線蛍光(XRF)によって測定した。
Claims (9)
- 基板上に金属膜を形成するための堆積方法であって、
有機金属前駆体から生成された気体前駆体を堆積チャンバ中に流すこと、
300℃未満の温度である基板を気体前駆体に曝露させて、基板上に金属を堆積させ、基板上に堆積された金属層を形成すること、
気体前駆体とともに酸化剤を堆積チャンバ中に流すこと、及び
堆積された金属層を酸化剤に曝露させ、金属膜を形成すること
を含み、
有機金属前駆体が金属及び一又は複数の炭素含有リガンドを含み、金属がモリブデン又はタングステンである、方法。 - 堆積された金属層が、汚染物質として有機金属前駆体に由来する炭素を含み、堆積された金属層を酸化剤に曝露させる工程により、酸化剤が、炭素汚染物質と反応し、堆積された金属層から炭素汚染物質を除去することを可能にする、請求項1に記載の方法。
- 金属膜が、同じ方法によるが、堆積チャンバ中へ酸化剤を流さずに調製された同等の金属膜と比較して、減少した量の炭素を含有する、請求項1に記載の方法。
- 有機金属前駆体が、カルボニル含有前駆体、シクロペンタジエニル含有前駆体、アリール前駆体、アルキル置換アリール前駆体、アミド-イミド含有前駆体、及びアミジネート又はグアニジネート(guanidinate)前駆体から選択される、請求項1に記載の方法。
- 有機金属前駆体が、ビス(エチルベンゼン)モリブデン及びビス(エチルベンゼン)タングステンから選択される、請求項1に記載の方法。
- 基板上に金属膜を形成するための堆積方法であって、
方法が、パルス化された化学蒸着法であり、該パルス化された化学蒸着法が、
有機金属前駆体から生成された気体前駆体及び還元ガス共反応物を堆積チャンバ中に継続的に流すこと、
300℃未満の温度である基板を気体前駆体及び還元ガス共反応物に曝露させて、基板上に堆積された金属層を形成すること、
パルス化された流れにより酸化剤を堆積チャンバ中に流すこと、ここで酸化剤が、継続的に流れる気体前駆体とともに堆積チャンバ中に存在し、及び
堆積された金属層を酸化剤に曝露させて、金属膜を形成すること
を含み、
有機金属前駆体が金属及び一又は複数の炭素含有リガンドを含み、金属がモリブデン又はタングステンである、方法。 - 50オングストロームを超えない厚さを有する堆積された金属層を生成する、請求項6に記載の方法。
- 堆積された金属を酸化剤に曝露させた後に、水素ガスを堆積チャンバ中に流すことを更に含む、請求項6に記載の方法。
- 基板上に金属膜を形成するための堆積方法であって、
方法が、原子層堆積法であり、該原子層堆積法が、
有機金属前駆体から生成された気体前駆体を堆積チャンバ中に流すこと、
300℃未満の温度である基板を任意選択的に不活性ガスの存在下で気体前駆体に曝露させて、基板上に堆積された金属層を形成すること、及び
気体前駆体とともに酸化剤を堆積チャンバ中に流すこと、
堆積された金属層を酸化剤に曝露させて、金属膜を形成すること
を含み、
有機金属前駆体が金属及び一又は複数の炭素含有リガンドを含み、金属がモリブデン又はタングステンである、方法。
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