JP2006089790A - 貴金属膜、貴金属酸化物膜、および貴金属ケイ化物膜の製造方法 - Google Patents
貴金属膜、貴金属酸化物膜、および貴金属ケイ化物膜の製造方法 Download PDFInfo
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- JP2006089790A JP2006089790A JP2004274726A JP2004274726A JP2006089790A JP 2006089790 A JP2006089790 A JP 2006089790A JP 2004274726 A JP2004274726 A JP 2004274726A JP 2004274726 A JP2004274726 A JP 2004274726A JP 2006089790 A JP2006089790 A JP 2006089790A
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- 229910000510 noble metal Inorganic materials 0.000 title claims abstract description 172
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 229910021332 silicide Inorganic materials 0.000 title claims abstract description 22
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 118
- 239000000758 substrate Substances 0.000 claims abstract description 58
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 21
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000000151 deposition Methods 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000007800 oxidant agent Substances 0.000 claims abstract description 15
- 150000001875 compounds Chemical class 0.000 claims abstract description 9
- 150000005309 metal halides Chemical class 0.000 claims description 83
- 239000007789 gas Substances 0.000 claims description 58
- 238000010926 purge Methods 0.000 claims description 16
- 150000004706 metal oxides Chemical class 0.000 claims description 15
- 230000008021 deposition Effects 0.000 claims description 11
- 230000001590 oxidative effect Effects 0.000 claims description 6
- VOSJXMPCFODQAR-UHFFFAOYSA-N ac1l3fa4 Chemical compound [SiH3]N([SiH3])[SiH3] VOSJXMPCFODQAR-UHFFFAOYSA-N 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 4
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims description 4
- 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 claims description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 2
- -1 diborane Chemical compound 0.000 claims description 2
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 claims description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 2
- 229960001730 nitrous oxide Drugs 0.000 claims description 2
- 235000013842 nitrous oxide Nutrition 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 229910000077 silane Inorganic materials 0.000 claims description 2
- LXEXBJXDGVGRAR-UHFFFAOYSA-N trichloro(trichlorosilyl)silane Chemical compound Cl[Si](Cl)(Cl)[Si](Cl)(Cl)Cl LXEXBJXDGVGRAR-UHFFFAOYSA-N 0.000 claims description 2
- VEDJZFSRVVQBIL-UHFFFAOYSA-N trisilane Chemical compound [SiH3][SiH2][SiH3] VEDJZFSRVVQBIL-UHFFFAOYSA-N 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000012071 phase Substances 0.000 claims 4
- 239000012808 vapor phase Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 6
- 239000001257 hydrogen Substances 0.000 abstract description 3
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 3
- 239000007792 gaseous phase Substances 0.000 abstract 2
- 150000004820 halides Chemical class 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 25
- 239000011261 inert gas Substances 0.000 description 23
- 239000000376 reactant Substances 0.000 description 22
- 238000005229 chemical vapour deposition Methods 0.000 description 21
- 229910052741 iridium Inorganic materials 0.000 description 21
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 20
- 229910001873 dinitrogen Inorganic materials 0.000 description 19
- JQAZQSHUPWSSPF-UHFFFAOYSA-H iridium hexafluoride Chemical compound F[Ir](F)(F)(F)(F)F JQAZQSHUPWSSPF-UHFFFAOYSA-H 0.000 description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 14
- 229910052710 silicon Inorganic materials 0.000 description 14
- 239000010703 silicon Substances 0.000 description 14
- 239000004065 semiconductor Substances 0.000 description 11
- 238000000231 atomic layer deposition Methods 0.000 description 9
- 239000002243 precursor Substances 0.000 description 9
- 229910000449 hafnium oxide Inorganic materials 0.000 description 6
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 5
- 239000007795 chemical reaction product Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000010948 rhodium Substances 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000003085 diluting agent Substances 0.000 description 3
- HTXDPTMKBJXEOW-UHFFFAOYSA-N dioxoiridium Chemical compound O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 229910000457 iridium oxide Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 229910052703 rhodium Inorganic materials 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- HLYTZTFNIRBLNA-LNTINUHCSA-K iridium(3+);(z)-4-oxopent-2-en-2-olate Chemical compound [Ir+3].C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O HLYTZTFNIRBLNA-LNTINUHCSA-K 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002736 metal compounds Chemical class 0.000 description 2
- 229910052762 osmium Inorganic materials 0.000 description 2
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002504 iridium compounds Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- RFWLPKSDISVSGM-UHFFFAOYSA-I pentafluoroosmium Chemical compound F[Os](F)(F)(F)F RFWLPKSDISVSGM-UHFFFAOYSA-I 0.000 description 1
- IUSPGFXRAJDYRG-UHFFFAOYSA-I pentafluororuthenium Chemical compound F[Ru](F)(F)(F)F IUSPGFXRAJDYRG-UHFFFAOYSA-I 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- NHWBVRAPBLSUQQ-UHFFFAOYSA-H ruthenium hexafluoride Chemical compound F[Ru](F)(F)(F)(F)F NHWBVRAPBLSUQQ-UHFFFAOYSA-H 0.000 description 1
- 238000000682 scanning probe acoustic microscopy Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- JBXWMZTZQQGLAG-UHFFFAOYSA-H tetrafluoroplatinum(2+) difluoride Chemical compound F[Pt](F)(F)(F)(F)F JBXWMZTZQQGLAG-UHFFFAOYSA-H 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000007740 vapor deposition Methods 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]
- C23C16/45553—Atomic layer deposition [ALD] characterized by the use of precursors specially adapted for 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
- C23C16/06—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
- C23C16/08—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 metal halides
- C23C16/14—Deposition of only one other metal element
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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
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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
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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
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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
- H01L21/04—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
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28026—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor
- H01L21/28079—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being a single metal, e.g. Ta, W, Mo, Al
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- H01L28/40—Capacitors
- H01L28/60—Electrodes
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Abstract
【解決手段】少なくとも1つの基板を収容する反応チャンバ(11)内に気相状態の揮発性貴金属ハロゲン化物と気相状態の還元剤水素、酸化剤またはケイ化剤を導入することにより両者を反応させ、前記少なくとも1つの基板上に貴金属、貴金属酸化物または貴金属ケイ化物を堆積させる。
【選択図】 図1
Description
Thin Solid Films, 346, 100-107 (1999) Mat. Res. Soc. Symp. Proc., Vol. 168, 369-374 (1990) IEEE 2001, 961-964
本発明において、貴金属、貴金属酸化物または貴金属ケイ化物の前駆体として、いずれも、揮発性貴金属ハロゲン化物を用いる。貴金属には、イリジウム(Ir)、ルテニウム(Ru)、ロジウム(Rh)、オスミウム(Os)、白金(Pt)およびパラジウム(Pd)が含まれる。揮発性貴金属ハロゲン化物の例を挙げると、六フッ化イリジウム(IrF6)、五フッ化ルテニウム(RuF5)、六フッ化ルテニウム(RuF6)、五フッ化オスミウム(OsF5)、六フッ化オスミウム(OsF6)、六フッ化白金(PtF6)、六フッ化パラジウム(PdF6)等である。これら揮発性貴金属ハロゲン化物は、単独で、または2種以上混合して用いることができる。本発明においては、六フッ化物を用いることが好ましい。
反応チャンバ内にシリコン基板と表面に酸化ハフニウム膜を有するシリコン半導体を収容した。この反応チャンバ内に、窒素ガスで希釈した六フッ化イリジウム(六フッ化イリジウム濃度2体積%)と、窒素ガスで希釈した水素ガス(水素ガス濃度1体積%)とを反応チャンバの直前で混合して反応チャンバ内に導入した。反応チャンバにおける六フッ化イリジウム、水素ガスおよび総窒素ガスの流量は、それぞれ、1sccm、2sccmおよび160sccmであった。反応チャンバ内の圧力は1Torrに設定した。基板温度を上昇させると、500℃で金属イリジウムの堆積が始まった。同温度における金属イリジウムの堆積速度は、約15Å/分であった。得られた金属イリジウム膜は、シリコン基板およびシリコン基板上の酸化ハフニウム膜に強固に結合していた。
反応チャンバ内にシリコン基板と表面に酸化ハフニウム膜を有するシリコン半導体を収容した。この反応チャンバ内に、窒素ガスで希釈した水素ガス(水素ガス濃度1体積%)を連続的に導入しながら、窒素ガスで希釈した六フッ化イリジウムガス(六フッ化イリジウム濃度2体積%)を1秒間パルス注入した。その後、反応チャンバ内を窒素ガスで6秒間パージした。このサイクルを基板温度500℃で繰り返し行った。反応チャンバ内圧力は、1Torrに維持した。反応チャンバ内では、六フッ化イリジウム、水素ガスおよび総窒素ガスの流量をそれぞれ実施例1と同じ流量で流した。500℃での金属イリジウムの堆積速度は、1.2Å/分であった。
反応チャンバ内にシリコン基板を収容した。この反応チャンバ内に、窒素ガスで希釈した六フッ化イリジウムを1秒間導入して、基板上にイリジウム化合物の薄い層を形成した。ついで、反応チャンバ内を窒素ガスでパージすることにより未反応の六フッ化イリジウムを除去した後、水素ガスを希釈剤としての窒素ガスとともに1秒間反応チャンバ内に導入した。反応チャンバ内において、希釈剤として用いた窒素ガスの全流量は160sccmであり、水素ガスの流量は2sccmであり、六フッ化イリジウムの流量は1sccmであった。反応チャンバ内圧力は0.25Torrに維持した。また、基板温度は400℃に設定した。
反応チャンバ内にシリコン基板を収容した。この反応チャンバ内に、窒素ガスで希釈した六フッ化イリジウム(六フッ化イリジウム濃度0.5体積%)と、窒素ガスで希釈した酸素ガス(酸素ガス濃度1体積%)とを反応チャンバの直前で混合して反応チャンバ内に導入した。反応チャンバにおける六フッ化イリジウム、酸素ガスおよび総窒素ガスの流量は、それぞれ、1sccm、2sccmおよび200sccmであった。反応チャンバ内の圧力は1Torrに設定した。基板温度を上昇させると、500℃でイリジウム酸化物の堆積が始まった。実験により、紫色の成膜を確認した。その後、この膜の組成をオージェ電子分光分析により分析し、イリジウム酸化物であることを確認した。
反応チャンバ内にシリコン基板と表面に酸化ハフニウム膜を有するシリコン半導体を収容した。この反応チャンバ内に、窒素ガスで希釈した六フッ化イリジウム(六フッ化イリジウム濃度0.5体積%)と、窒素ガスで希釈したトリシリルアミン(トリシリルアミン濃度1体積%)とを反応チャンバの直前で混合して反応チャンバ内に導入した。反応チャンバにおける六フッ化イリジウム、トリシリルアミンガスおよび総窒素ガスの流量は、それぞれ、1sccm、2sccmおよび200sccmであった。反応チャンバ内の圧力は1Torrに設定した。基板温度を上昇させると、500℃でイリジウムケイ化物の堆積が始まった。同温度におけるイリジウムケイ化物の堆積速度は、約20Å/分であった。得られたイリジウムケイ化物膜は、シリコン基板およびシリコン基板上の酸化ハフニウム膜に強固に結合していた。なお、イリジウムケイ化物の生成は、オージェ電子分光分析により確認した。
12…揮発性貴金属ハロゲン化物の供給源
13…共反応剤ガスの供給源
14…不活性ガスの供給源
Claims (26)
- 少なくとも1つの基板を収容する反応チャンバ内に気相状態の揮発性貴金属ハロゲン化物と水素ガスを含む還元剤を導入することにより両者を反応させ、前記少なくとも1つの基板上に貴金属を堆積させることを特徴とする貴金属膜の製造方法。
- 前記貴金属ハロゲン化物が、六フッ化物であることを特徴とする請求項1に記載の製造方法。
- 前記反応チャンバ内の圧力を0.01〜1000Torrに維持することを特徴とする請求項1〜3のいずれか1項に記載の製造方法。
- 前記堆積を300〜800℃の基板温度で行うことを特徴とする請求項1〜3のいずれか1項に記載の製造方法。
- 前記揮発性貴金属ハロゲン化物と前記還元剤を前記反応チャンバ内に共存させることを特徴とする請求項1〜4のいずれか1項に記載の製造方法。
- 前記還元剤を前記反応チャンバ内に連続的に供給し、その反応チャンバ内に前記揮発性貴金属ハロゲン化物をパルス注入し、その貴金属ハロゲン化物を前記還元剤で還元することを特徴とする請求項1〜4のいずれか1項に記載の製造方法。
- 前記揮発性貴金属ハロゲン化物および前記還元剤のうち、まず前記揮発性貴金属ハロゲン化物を前記反応チャンバ内に導入して前記基板上に前記貴金属を含む化合物の層を形成し、ついで前記反応チャンバ内をパージした後、前記還元剤を前記反応チャンバ内に導入して前記貴金属を含む化合物の層を還元することを特徴とする請求項1〜4のいずれか1項に記載の製造方法。
- 前記還元後、前記反応チャンバ内をパージし、しかる後、前記揮発性貴金属ハロゲン化物の導入と前記還元剤の導入を、その間に前記反応チャンバ内のパージを介在させて、繰り返し行うことを特徴とする請求項7に記載の製造方法。
- 少なくとも1つの基板を収容する反応チャンバ内に気相状態の揮発性貴金属ハロゲン化物と気相状態の酸化剤を導入することにより両者を反応させ、前記少なくとも1つの基板上に貴金属酸化物を堆積させることを特徴とする貴金属酸化物膜の製造方法。
- 前記揮発性貴金属ハロゲン化物が、六フッ化物であることを特徴とする請求項9に記載の製造方法。
- 前記酸化剤が、酸素、オゾン、一酸化窒素、一酸化二窒素、二酸化窒素、水蒸気、またはそれら2種以上の混合物を含むことを特徴とする請求項9または10に記載の製造方法。
- 前記反応チャンバ内の圧力を0.01〜1000Torrに維持することを特徴とする請求項9〜13のいずれか1項に記載の製造方法。
- 前記堆積を300℃〜800℃の温度で行うことを特徴とする請求項9〜12のいずれか1項に記載の製造方法。
- 前記揮発性貴金属ハロゲン化物と前記酸化剤を前記反応チャンバ内に共存させることを特徴とする請求項9〜13のいずれか1項に記載の製造方法。
- 前記酸化剤を前記反応チャンバ内に連続的に供給し、その反応チャンバ内に前記揮発性貴金属ハロゲン化物をパルス注入し、その貴金属ハロゲン化物を前記酸化剤で酸化することを特徴とする請求項9〜14のいずれか1項に記載の製造方法。
- 前記揮発性貴金属ハロゲン化物および前記酸化剤のうち、まず前記揮発性貴金属ハロゲン化物を前記反応チャンバ内に導入して前記基板上に前記貴金属を含む化合物の層を形成し、ついで前記反応チャンバ内をパージした後、前記酸化剤を前記反応チャンバ内に導入して前記貴金属を含む化合物の層を酸化することを特徴とする請求項9〜14のいずれか1項に記載の製造方法。
- 前記酸化後、前記反応チャンバ内をパージし、しかる後、前記揮発性貴金属ハロゲン化物の導入と前記酸化剤の導入を、その間に前記反応チャンバ内のパージを介在させて、繰り返し行うことを特徴とする請求項16に記載の製造方法。
- 少なくとも1つの基板を収容する反応チャンバ内に気相状態の揮発性貴金属ハロゲン化物と気相状態のケイ化剤を導入することにより両者を反応させ、前記少なくとも1つの基板上に貴金属ケイ化物を堆積させることを特徴とする貴金属ケイ化物膜の製造方法。
- 前記揮発性貴金属ハロゲン化物が、六フッ化物であることを特徴とする請求項18に記載の製造方法。
- 前記ケイ化剤が、トリシリルアミン、シラン、ジシラン、トリシラン、ジボラン、ヘキサクロロジシラン、またはそれら2種以上の混合物を含むことを特徴とする請求項18または19に記載の製造方法。
- 前記反応チャンバ内の圧力を0.01〜1000Torrに維持することを特徴とする請求項18〜21のいずれか1項に記載の製造方法。
- 前記堆積を300℃〜800℃の温度で行うことを特徴とする請求項18〜21のいずれか1項に記載の製造方法。
- 前記揮発性貴金属ハロゲン化物と前記ケイ化剤を前記反応チャンバ内に共存させることを特徴とする請求項18〜22のいずれか1項に記載の製造方法。
- 前記ケイ化剤を前記反応チャンバ内に連続的に供給し、その反応チャンバ内に前記揮発性貴金属ハロゲン化物をパルス注入し、その貴金属ハロゲン化物を前記ケイ化剤でケイ化することを特徴とする請求項18〜22のいずれか1項に記載の製造方法。
- 前記揮発性貴金属ハロゲン化物および前記ケイ化剤のうち、まず前記揮発性貴金属ハロゲン化物を前記反応チャンバ内に導入して前記基板上に前記貴金属を含む化合物の層を形成し、ついで前記反応チャンバ内をパージした後、前記ケイ化剤を前記反応チャンバ内に導入して前記貴金属を含む化合物の層をケイ化することを特徴とする請求項18〜22のいずれか1項に記載の製造方法。
- 前記ケイ化後、前記反応チャンバ内をパージし、しかる後、前記揮発性貴金属ハロゲン化物の導入と前記ケイ化剤の導入を、その間に前記反応チャンバ内のパージを介在させて、繰り返し行うことを特徴とする請求項25に記載の製造方法。
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PCT/IB2005/002567 WO2006032963A2 (en) | 2004-09-22 | 2005-08-31 | Methods for producing noble metal films, noble metal oxide films, and noble metal silicide films |
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WO2019055510A1 (en) | 2017-09-12 | 2019-03-21 | Applied Materials, Inc. | LOW TEMPERATURE DEPOSITION OF IRIDIUM-CONTAINING FILM |
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