JP2014507815A - 新規なエッチング組成物 - Google Patents
新規なエッチング組成物 Download PDFInfo
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- JP2014507815A JP2014507815A JP2013557858A JP2013557858A JP2014507815A JP 2014507815 A JP2014507815 A JP 2014507815A JP 2013557858 A JP2013557858 A JP 2013557858A JP 2013557858 A JP2013557858 A JP 2013557858A JP 2014507815 A JP2014507815 A JP 2014507815A
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- JP
- Japan
- Prior art keywords
- composition
- nitrate
- sulfonic acid
- acid
- chloride
- 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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- 239000000203 mixture Substances 0.000 title claims abstract description 237
- 238000005530 etching Methods 0.000 title claims abstract description 153
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 135
- -1 halide anion Chemical class 0.000 claims abstract description 126
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims abstract description 100
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 54
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 claims abstract description 36
- 150000001875 compounds Chemical class 0.000 claims abstract description 28
- FZRKAZHKEDOPNN-UHFFFAOYSA-N Nitric oxide anion Chemical compound O=[N-] FZRKAZHKEDOPNN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims description 49
- 239000002184 metal Substances 0.000 claims description 49
- 239000000758 substrate Substances 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 43
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 claims description 29
- 125000000217 alkyl group Chemical group 0.000 claims description 29
- 239000004065 semiconductor Substances 0.000 claims description 22
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 21
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 19
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 claims description 18
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 17
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 17
- 229940098779 methanesulfonic acid Drugs 0.000 claims description 15
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 14
- 229910017604 nitric acid Inorganic materials 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 12
- 125000001453 quaternary ammonium group Chemical group 0.000 claims description 11
- 229910052731 fluorine Inorganic materials 0.000 claims description 10
- 235000019270 ammonium chloride Nutrition 0.000 claims description 8
- 229910052801 chlorine Inorganic materials 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 125000005010 perfluoroalkyl group Chemical group 0.000 claims description 7
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 claims description 6
- 229910000042 hydrogen bromide Inorganic materials 0.000 claims description 6
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 claims description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 229910001510 metal chloride Inorganic materials 0.000 claims description 4
- 229910001960 metal nitrate Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- VQTGUFBGYOIUFS-UHFFFAOYSA-N nitrosylsulfuric acid Chemical compound OS(=O)(=O)ON=O VQTGUFBGYOIUFS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- 239000000376 reactant Substances 0.000 claims description 4
- 125000002723 alicyclic group Chemical group 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 229910052794 bromium Inorganic materials 0.000 claims description 3
- MTKLVWMDKKAGQI-UHFFFAOYSA-O phosphanium;nitrate Chemical compound [PH4+].[O-][N+]([O-])=O MTKLVWMDKKAGQI-UHFFFAOYSA-O 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 239000004157 Nitrosyl chloride Substances 0.000 claims description 2
- USJRLGNYCQWLPF-UHFFFAOYSA-N chlorophosphane Chemical compound ClP USJRLGNYCQWLPF-UHFFFAOYSA-N 0.000 claims description 2
- 229910052736 halogen Inorganic materials 0.000 claims description 2
- 150000002367 halogens Chemical class 0.000 claims description 2
- 229910052741 iridium Inorganic materials 0.000 claims description 2
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 2
- 229910001509 metal bromide Inorganic materials 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- BMNDJWSIKZECMH-UHFFFAOYSA-N nitrosyl bromide Chemical compound BrN=O BMNDJWSIKZECMH-UHFFFAOYSA-N 0.000 claims description 2
- VPCDQGACGWYTMC-UHFFFAOYSA-N nitrosyl chloride Chemical compound ClN=O VPCDQGACGWYTMC-UHFFFAOYSA-N 0.000 claims description 2
- 235000019392 nitrosyl chloride Nutrition 0.000 claims description 2
- ZEIYBPGWHWECHV-UHFFFAOYSA-N nitrosyl fluoride Chemical compound FN=O ZEIYBPGWHWECHV-UHFFFAOYSA-N 0.000 claims description 2
- PMOIAJVKYNVHQE-UHFFFAOYSA-N phosphanium;bromide Chemical compound [PH4+].[Br-] PMOIAJVKYNVHQE-UHFFFAOYSA-N 0.000 claims description 2
- 229910052702 rhenium Inorganic materials 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims 2
- 229910045601 alloy Inorganic materials 0.000 claims 2
- 125000004356 hydroxy functional group Chemical group O* 0.000 claims 1
- 150000002602 lanthanoids Chemical class 0.000 claims 1
- 150000004820 halides Chemical class 0.000 abstract description 25
- 150000001805 chlorine compounds Chemical group 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 53
- 238000009472 formulation Methods 0.000 description 52
- 229910052782 aluminium Inorganic materials 0.000 description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 27
- 238000005260 corrosion Methods 0.000 description 27
- 230000007797 corrosion Effects 0.000 description 25
- 239000000463 material Substances 0.000 description 25
- 230000003647 oxidation Effects 0.000 description 25
- 238000007254 oxidation reaction Methods 0.000 description 25
- 150000003460 sulfonic acids Chemical class 0.000 description 22
- 230000008569 process Effects 0.000 description 18
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 14
- 229910052710 silicon Inorganic materials 0.000 description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 13
- 239000010703 silicon Substances 0.000 description 13
- 238000013019 agitation Methods 0.000 description 12
- 239000000654 additive Substances 0.000 description 10
- 239000004033 plastic Substances 0.000 description 10
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 8
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 8
- 229910021332 silicide Inorganic materials 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 229910052718 tin Inorganic materials 0.000 description 8
- 150000002739 metals Chemical class 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- MNURPFVONZPVLA-UHFFFAOYSA-N 2-chlorobenzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1Cl MNURPFVONZPVLA-UHFFFAOYSA-N 0.000 description 6
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 6
- JLTDJTHDQAWBAV-UHFFFAOYSA-N N,N-dimethylaniline Chemical compound CN(C)C1=CC=CC=C1 JLTDJTHDQAWBAV-UHFFFAOYSA-N 0.000 description 6
- RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical compound C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- 150000001649 bromium compounds Chemical class 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 6
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 6
- XGMDYIYCKWMWLY-UHFFFAOYSA-N 2,2,2-trifluoroethanesulfonic acid Chemical compound OS(=O)(=O)CC(F)(F)F XGMDYIYCKWMWLY-UHFFFAOYSA-N 0.000 description 5
- LBLYYCQCTBFVLH-UHFFFAOYSA-N 2-Methylbenzenesulfonic acid Chemical compound CC1=CC=CC=C1S(O)(=O)=O LBLYYCQCTBFVLH-UHFFFAOYSA-N 0.000 description 5
- JIFAWAXKXDTUHW-UHFFFAOYSA-N 2-fluorobenzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1F JIFAWAXKXDTUHW-UHFFFAOYSA-N 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical group O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- 150000001450 anions Chemical class 0.000 description 5
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 description 5
- 229940092714 benzenesulfonic acid Drugs 0.000 description 5
- CCIVGXIOQKPBKL-UHFFFAOYSA-M ethanesulfonate Chemical compound CCS([O-])(=O)=O CCIVGXIOQKPBKL-UHFFFAOYSA-M 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- PCLURTMBFDTLSK-UHFFFAOYSA-N nickel platinum Chemical compound [Ni].[Pt] PCLURTMBFDTLSK-UHFFFAOYSA-N 0.000 description 5
- 150000002823 nitrates Chemical class 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 5
- GKNWQHIXXANPTN-UHFFFAOYSA-N 1,1,2,2,2-pentafluoroethanesulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)(F)F GKNWQHIXXANPTN-UHFFFAOYSA-N 0.000 description 4
- XBWQFDNGNOOMDZ-UHFFFAOYSA-N 1,1,2,2,3,3,3-heptafluoropropane-1-sulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)F XBWQFDNGNOOMDZ-UHFFFAOYSA-N 0.000 description 4
- QFNSAOSWJSCHID-UHFFFAOYSA-N 2-butylbenzenesulfonic acid Chemical compound CCCCC1=CC=CC=C1S(O)(=O)=O QFNSAOSWJSCHID-UHFFFAOYSA-N 0.000 description 4
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 4
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 4
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 description 4
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 4
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 4
- KYQCOXFCLRTKLS-UHFFFAOYSA-N Pyrazine Chemical compound C1=CN=CC=N1 KYQCOXFCLRTKLS-UHFFFAOYSA-N 0.000 description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- MVIOINXPSFUJEN-UHFFFAOYSA-N benzenesulfonic acid;hydrate Chemical compound O.OS(=O)(=O)C1=CC=CC=C1 MVIOINXPSFUJEN-UHFFFAOYSA-N 0.000 description 4
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 4
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 description 4
- QDHFHIQKOVNCNC-UHFFFAOYSA-N butane-1-sulfonic acid Chemical compound CCCCS(O)(=O)=O QDHFHIQKOVNCNC-UHFFFAOYSA-N 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- JQVDAXLFBXTEQA-UHFFFAOYSA-N dibutylamine Chemical compound CCCCNCCCC JQVDAXLFBXTEQA-UHFFFAOYSA-N 0.000 description 4
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 4
- AFAXGSQYZLGZPG-UHFFFAOYSA-N ethanedisulfonic acid Chemical compound OS(=O)(=O)CCS(O)(=O)=O AFAXGSQYZLGZPG-UHFFFAOYSA-N 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- OPUAWDUYWRUIIL-UHFFFAOYSA-N methanedisulfonic acid Chemical compound OS(=O)(=O)CS(O)(=O)=O OPUAWDUYWRUIIL-UHFFFAOYSA-N 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- JGTNAGYHADQMCM-UHFFFAOYSA-N perfluorobutanesulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F JGTNAGYHADQMCM-UHFFFAOYSA-N 0.000 description 4
- NIXKBAZVOQAHGC-UHFFFAOYSA-N phenylmethanesulfonic acid Chemical compound OS(=O)(=O)CC1=CC=CC=C1 NIXKBAZVOQAHGC-UHFFFAOYSA-N 0.000 description 4
- KCXFHTAICRTXLI-UHFFFAOYSA-N propane-1-sulfonic acid Chemical compound CCCS(O)(=O)=O KCXFHTAICRTXLI-UHFFFAOYSA-N 0.000 description 4
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 125000001424 substituent group Chemical group 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 4
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 4
- ORNGPPZBMMHKPM-UHFFFAOYSA-N 1,1,1,2,2-pentafluoro-2-(1,1,2,2,2-pentafluoroethoxy)ethane Chemical compound FC(F)(F)C(F)(F)OC(F)(F)C(F)(F)F ORNGPPZBMMHKPM-UHFFFAOYSA-N 0.000 description 3
- NCUVQJKPUJYKHX-UHFFFAOYSA-N 1,1,1,2,2-pentafluoro-2-(trifluoromethoxy)ethane Chemical compound FC(F)(F)OC(F)(F)C(F)(F)F NCUVQJKPUJYKHX-UHFFFAOYSA-N 0.000 description 3
- ZGZXYZZHXXTTJN-UHFFFAOYSA-N 2,3-dichlorobenzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC(Cl)=C1Cl ZGZXYZZHXXTTJN-UHFFFAOYSA-N 0.000 description 3
- FKOZPUORKCHONH-UHFFFAOYSA-N 2-methylpropane-1-sulfonic acid Chemical compound CC(C)CS(O)(=O)=O FKOZPUORKCHONH-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- MIAUJDCQDVWHEV-UHFFFAOYSA-N benzene-1,2-disulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1S(O)(=O)=O MIAUJDCQDVWHEV-UHFFFAOYSA-N 0.000 description 3
- RBLUCZPAJPJVMC-UHFFFAOYSA-N bicyclo[2.2.1]heptane-4-sulfonic acid Chemical compound C1CC2CCC1(S(=O)(=O)O)C2 RBLUCZPAJPJVMC-UHFFFAOYSA-N 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000008139 complexing agent Substances 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 229940052303 ethers for general anesthesia Drugs 0.000 description 3
- 150000003840 hydrochlorides Chemical class 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 238000004377 microelectronic Methods 0.000 description 3
- 229910021339 platinum silicide Inorganic materials 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- MIOPJNTWMNEORI-GMSGAONNSA-N (S)-camphorsulfonic acid Chemical compound C1C[C@@]2(CS(O)(=O)=O)C(=O)C[C@@H]1C2(C)C MIOPJNTWMNEORI-GMSGAONNSA-N 0.000 description 2
- CFCRODHVHXGTPC-UHFFFAOYSA-N 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,12-pentacosafluorododecane-1-sulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F CFCRODHVHXGTPC-UHFFFAOYSA-N 0.000 description 2
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 2
- LDMOEFOXLIZJOW-UHFFFAOYSA-N 1-dodecanesulfonic acid Chemical compound CCCCCCCCCCCCS(O)(=O)=O LDMOEFOXLIZJOW-UHFFFAOYSA-N 0.000 description 2
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 2
- LEDKKDPOPIKMSZ-UHFFFAOYSA-N 2,4,5-trichlorobenzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC(Cl)=C(Cl)C=C1Cl LEDKKDPOPIKMSZ-UHFFFAOYSA-N 0.000 description 2
- KUCWUAFNGCMZDB-UHFFFAOYSA-N 2-amino-3-nitrophenol Chemical compound NC1=C(O)C=CC=C1[N+]([O-])=O KUCWUAFNGCMZDB-UHFFFAOYSA-N 0.000 description 2
- JUSXLWAFYVKNLT-UHFFFAOYSA-N 2-bromobenzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1Br JUSXLWAFYVKNLT-UHFFFAOYSA-N 0.000 description 2
- DTMJOBZCHQINTP-UHFFFAOYSA-N 2-chloro-3-methylbenzenesulfonic acid Chemical compound CC1=CC=CC(S(O)(=O)=O)=C1Cl DTMJOBZCHQINTP-UHFFFAOYSA-N 0.000 description 2
- CMGPPGOUOGYCGD-UHFFFAOYSA-N 2-cyclohexylbenzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1C1CCCCC1 CMGPPGOUOGYCGD-UHFFFAOYSA-N 0.000 description 2
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 description 2
- YBRVSVVVWCFQMG-UHFFFAOYSA-N 4,4'-diaminodiphenylmethane Chemical compound C1=CC(N)=CC=C1CC1=CC=C(N)C=C1 YBRVSVVVWCFQMG-UHFFFAOYSA-N 0.000 description 2
- LGCBVEQNSDSLIH-UHFFFAOYSA-N 4-pyridin-3-ylbutanal Chemical compound O=CCCCC1=CC=CN=C1 LGCBVEQNSDSLIH-UHFFFAOYSA-N 0.000 description 2
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- HWTDMFJYBAURQR-UHFFFAOYSA-N 80-82-0 Chemical compound OS(=O)(=O)C1=CC=CC=C1[N+]([O-])=O HWTDMFJYBAURQR-UHFFFAOYSA-N 0.000 description 2
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- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 description 1
- GYCHYNMREWYSKH-UHFFFAOYSA-L iron(ii) bromide Chemical compound [Fe+2].[Br-].[Br-] GYCHYNMREWYSKH-UHFFFAOYSA-L 0.000 description 1
- 238000012804 iterative process Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- OTCKOJUMXQWKQG-UHFFFAOYSA-L magnesium bromide Chemical compound [Mg+2].[Br-].[Br-] OTCKOJUMXQWKQG-UHFFFAOYSA-L 0.000 description 1
- 229910001623 magnesium bromide Inorganic materials 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- SEOYNUHKXVGWFU-UHFFFAOYSA-N mu-oxidobis(oxidonitrogen) Chemical class O=NON=O SEOYNUHKXVGWFU-UHFFFAOYSA-N 0.000 description 1
- KVBGVZZKJNLNJU-UHFFFAOYSA-N naphthalene-2-sulfonic acid Chemical compound C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 KVBGVZZKJNLNJU-UHFFFAOYSA-N 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- UQPSGBZICXWIAG-UHFFFAOYSA-L nickel(2+);dibromide;trihydrate Chemical compound O.O.O.Br[Ni]Br UQPSGBZICXWIAG-UHFFFAOYSA-L 0.000 description 1
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000001139 pH measurement Methods 0.000 description 1
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 1
- INIOZDBICVTGEO-UHFFFAOYSA-L palladium(ii) bromide Chemical compound Br[Pd]Br INIOZDBICVTGEO-UHFFFAOYSA-L 0.000 description 1
- GPNDARIEYHPYAY-UHFFFAOYSA-N palladium(ii) nitrate Chemical compound [Pd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O GPNDARIEYHPYAY-UHFFFAOYSA-N 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 229960004624 perflexane Drugs 0.000 description 1
- ZJIJAJXFLBMLCK-UHFFFAOYSA-N perfluorohexane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F ZJIJAJXFLBMLCK-UHFFFAOYSA-N 0.000 description 1
- QZHDEAJFRJCDMF-UHFFFAOYSA-N perfluorohexanesulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F QZHDEAJFRJCDMF-UHFFFAOYSA-N 0.000 description 1
- REJGOFYVRVIODZ-UHFFFAOYSA-N phosphanium;chloride Chemical class P.Cl REJGOFYVRVIODZ-UHFFFAOYSA-N 0.000 description 1
- CLSUSRZJUQMOHH-UHFFFAOYSA-L platinum dichloride Chemical compound Cl[Pt]Cl CLSUSRZJUQMOHH-UHFFFAOYSA-L 0.000 description 1
- KGRJUMGAEQQVFK-UHFFFAOYSA-L platinum(2+);dibromide Chemical compound Br[Pt]Br KGRJUMGAEQQVFK-UHFFFAOYSA-L 0.000 description 1
- NWAHZABTSDUXMJ-UHFFFAOYSA-N platinum(2+);dinitrate Chemical compound [Pt+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O NWAHZABTSDUXMJ-UHFFFAOYSA-N 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009257 reactivity Effects 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
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 description 1
- RKHXQBLJXBGEKF-UHFFFAOYSA-M tetrabutylphosphanium;bromide Chemical compound [Br-].CCCC[P+](CCCC)(CCCC)CCCC RKHXQBLJXBGEKF-UHFFFAOYSA-M 0.000 description 1
- IBWGNZVCJVLSHB-UHFFFAOYSA-M tetrabutylphosphanium;chloride Chemical compound [Cl-].CCCC[P+](CCCC)(CCCC)CCCC IBWGNZVCJVLSHB-UHFFFAOYSA-M 0.000 description 1
- KUBXSUKJFAQDPV-UHFFFAOYSA-N tetrabutylphosphanium;nitrate Chemical compound [O-][N+]([O-])=O.CCCC[P+](CCCC)(CCCC)CCCC KUBXSUKJFAQDPV-UHFFFAOYSA-N 0.000 description 1
- LIXPXSXEKKHIRR-UHFFFAOYSA-M tetraethylphosphanium;bromide Chemical compound [Br-].CC[P+](CC)(CC)CC LIXPXSXEKKHIRR-UHFFFAOYSA-M 0.000 description 1
- FBOJNMRAZJRCNS-UHFFFAOYSA-M tetraethylphosphanium;chloride Chemical compound [Cl-].CC[P+](CC)(CC)CC FBOJNMRAZJRCNS-UHFFFAOYSA-M 0.000 description 1
- IYPJDYWPLUISDW-UHFFFAOYSA-N tetraethylphosphanium;nitrate Chemical compound [O-][N+]([O-])=O.CC[P+](CC)(CC)CC IYPJDYWPLUISDW-UHFFFAOYSA-N 0.000 description 1
- ZTXFOCMYRCGSMU-UHFFFAOYSA-M tetramethylphosphanium;bromide Chemical compound [Br-].C[P+](C)(C)C ZTXFOCMYRCGSMU-UHFFFAOYSA-M 0.000 description 1
- NJFUXFRJVIXVSG-UHFFFAOYSA-M tetramethylphosphanium;chloride Chemical compound [Cl-].C[P+](C)(C)C NJFUXFRJVIXVSG-UHFFFAOYSA-M 0.000 description 1
- ZJZOCPCCRFBQRL-UHFFFAOYSA-N tetramethylphosphanium;nitrate Chemical compound [O-][N+]([O-])=O.C[P+](C)(C)C ZJZOCPCCRFBQRL-UHFFFAOYSA-N 0.000 description 1
- BGQMOFGZRJUORO-UHFFFAOYSA-M tetrapropylammonium bromide Chemical compound [Br-].CCC[N+](CCC)(CCC)CCC BGQMOFGZRJUORO-UHFFFAOYSA-M 0.000 description 1
- FBEVECUEMUUFKM-UHFFFAOYSA-M tetrapropylazanium;chloride Chemical compound [Cl-].CCC[N+](CCC)(CCC)CCC FBEVECUEMUUFKM-UHFFFAOYSA-M 0.000 description 1
- HZPNJVXVIFRTRF-UHFFFAOYSA-N tetrapropylazanium;nitrate Chemical compound [O-][N+]([O-])=O.CCC[N+](CCC)(CCC)CCC HZPNJVXVIFRTRF-UHFFFAOYSA-N 0.000 description 1
- SMGSPBKMKYMJPQ-UHFFFAOYSA-M tetrapropylphosphanium;bromide Chemical compound [Br-].CCC[P+](CCC)(CCC)CCC SMGSPBKMKYMJPQ-UHFFFAOYSA-M 0.000 description 1
- QBAUHKSMFOSSGE-UHFFFAOYSA-M tetrapropylphosphanium;chloride Chemical compound [Cl-].CCC[P+](CCC)(CCC)CCC QBAUHKSMFOSSGE-UHFFFAOYSA-M 0.000 description 1
- CWULCMXUIWYVNJ-UHFFFAOYSA-N tetrapropylphosphanium;nitrate Chemical compound [O-][N+]([O-])=O.CCC[P+](CCC)(CCC)CCC CWULCMXUIWYVNJ-UHFFFAOYSA-N 0.000 description 1
- 150000003564 thiocarbonyl compounds Chemical class 0.000 description 1
- LTSUHJWLSNQKIP-UHFFFAOYSA-J tin(iv) bromide Chemical compound Br[Sn](Br)(Br)Br LTSUHJWLSNQKIP-UHFFFAOYSA-J 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- YFNKIDBQEZZDLK-UHFFFAOYSA-N triglyme Chemical compound COCCOCCOCCOC YFNKIDBQEZZDLK-UHFFFAOYSA-N 0.000 description 1
- LYHNHSGQAQUCQK-UHFFFAOYSA-N trimethyl(2,2,2-trifluoroethyl)azanium;nitrate Chemical compound [O-][N+]([O-])=O.C[N+](C)(C)CC(F)(F)F LYHNHSGQAQUCQK-UHFFFAOYSA-N 0.000 description 1
- DFEBZUPHJOVJKO-UHFFFAOYSA-M trimethyl(pentyl)azanium;bromide Chemical compound [Br-].CCCCC[N+](C)(C)C DFEBZUPHJOVJKO-UHFFFAOYSA-M 0.000 description 1
- GOVIUHPOWVHXMZ-UHFFFAOYSA-M trimethyl(pentyl)azanium;chloride Chemical compound [Cl-].CCCCC[N+](C)(C)C GOVIUHPOWVHXMZ-UHFFFAOYSA-M 0.000 description 1
- XLEAQRBBPLOTDD-UHFFFAOYSA-N trimethyl(pentyl)azanium;nitrate Chemical compound [O-][N+]([O-])=O.CCCCC[N+](C)(C)C XLEAQRBBPLOTDD-UHFFFAOYSA-N 0.000 description 1
- GNMJFQWRASXXMS-UHFFFAOYSA-M trimethyl(phenyl)azanium;bromide Chemical compound [Br-].C[N+](C)(C)C1=CC=CC=C1 GNMJFQWRASXXMS-UHFFFAOYSA-M 0.000 description 1
- MQAYPFVXSPHGJM-UHFFFAOYSA-M trimethyl(phenyl)azanium;chloride Chemical compound [Cl-].C[N+](C)(C)C1=CC=CC=C1 MQAYPFVXSPHGJM-UHFFFAOYSA-M 0.000 description 1
- DTEAMGZRDRBFPI-UHFFFAOYSA-N trimethyl(phenyl)azanium;nitrate Chemical compound [O-][N+]([O-])=O.C[N+](C)(C)C1=CC=CC=C1 DTEAMGZRDRBFPI-UHFFFAOYSA-N 0.000 description 1
- YRUWHUWWXSWGJV-UHFFFAOYSA-M trimethyl(phenyl)phosphanium;bromide Chemical compound [Br-].C[P+](C)(C)C1=CC=CC=C1 YRUWHUWWXSWGJV-UHFFFAOYSA-M 0.000 description 1
- XDZOFSVXLSVPCK-UHFFFAOYSA-M trimethyl(phenyl)phosphanium;chloride Chemical compound [Cl-].C[P+](C)(C)C1=CC=CC=C1 XDZOFSVXLSVPCK-UHFFFAOYSA-M 0.000 description 1
- NCMRDIFXAVGMRL-UHFFFAOYSA-N trimethyl(phenyl)phosphanium;nitrate Chemical compound [O-][N+]([O-])=O.C[P+](C)(C)C1=CC=CC=C1 NCMRDIFXAVGMRL-UHFFFAOYSA-N 0.000 description 1
- YQMWDQQWGKVOSQ-UHFFFAOYSA-N trinitrooxystannyl nitrate Chemical compound [Sn+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O YQMWDQQWGKVOSQ-UHFFFAOYSA-N 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
- 238000001039 wet etching Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229940102001 zinc bromide Drugs 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
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- C09K13/00—Etching, surface-brightening or pickling compositions
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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
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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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32133—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only
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- C23F1/00—Etching metallic material by chemical means
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- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
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- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
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Abstract
Description
本出願は、2011年3月11日に出願された米国仮出願第61/451,910号と、2011年9月29日に出願された米国仮出願第61/540,850号に基づいて優先権を主張する。親出願の内容は、その全体が本明細書中に参照されることにより組込まれる。
本発明は、半導体デバイスの製造、特に選択的金属ウェットエッチング組成物、及び隣接する構造や材料に対して、ある種の金属をこれらのエッチング組成物により選択的にエッチングするプロセスに関する。より具体的には、本発明は、アルミニウム、及びニッケル白金シリサイドのうち1つ以上の存在下で使用するための、水性金属エッチング組成物、及びプロセスに関するものである。
集積回路製造は多段階構築プロセスである。このプロセスは、下地層を選択的に露光するリソグラフィー、部分的または全体的に露光された層のエッチング、及び層の蒸着またはエッチングによって頻繁に生成されるギャップの充填または材料の選択的蒸着という反復工程を含む。金属のエッチングは重要なプロセス工程である。他の金属類、金属合金類、及び/または非金属材料の存在下で、隣接する材料を腐食、エッチングまたは酸化することなく、頻繁に金属は選択的にエッチングされなければならない。集積回路内のフィーチャの寸法がますます小さくなるにつれて、隣接する材料やフィーチャへの腐食、エッチング、酸化またはその他の損傷を最小限にする重要性が増加している。
一実施形態において、本開示は、金属膜(例えば、NiまたはNiPt膜)のエッチング用組成物であることを特徴とする。前記エッチング組成物は、少なくとも一つのスルホン酸、クロリド(chloride)及びブロミド(bromide)からなる群から選ばれる少なくとも一つのハロゲン化物アニオンを約0.01%〜約0.5%、ニトラート(nitrate)またはニトロシルイオンを含む少なくとも一つの化合物、前記ハロゲン化物及びニトラートアニオン(またはニトロシルカチオン)に対応する対イオン、並びに水を含む。
本明細書に記載される範囲や比率の数値限界(すなわち、その上限や下限)は、全て含まれる。本明細書に記載される範囲には、該範囲以内の全ての中間の数値が含まれる。言い換えると、本明細書に記載される該範囲以内の全ての中間の数値は、該範囲の開示によって全て開示されるものとみなされる。多様な開示された要素の全ての可能な組み合わせは、特段に排除されない限り、本発明の範囲内に含まれるものとみなされる。
製剤B: 4gHNO3、6g水、及び90gスルホン酸
前記2つの製剤中の前記水及びスルホン酸の含有量は、少々調整しても良いが、その調整範囲は、水が少量であること、及びHNO3とHClが水溶液として導入されるか否かによって制限される。
1:3比率:
製剤A: 1gHCl、8g水、及び41gスルホン酸
製剤B: 4gHNO3、7g水、及び139gスルホン酸
3:1比率:
製剤A: 1gHCl、8g水、及び141gスルホン酸
製剤B: 4gHNO3、7g水、及び39gスルホン酸
その他にも、前段落において記載されている前記製剤の一つは、ただHClと水だけを含むことができる。例えば、上述の製剤と同一である90%スルホン酸、0.5%HCl、2%HNO3、及び7.5%水からなる製剤は、以下の製剤A及びBの混合を経て得ることができる:
製剤A: 1gHCl、及び8g水
製剤B: 4gHNO3、7g水、及び180gスルホン酸
当業者であれば、各混合比率での製剤A及びBに必要な各成分の量を、容易に算出できる。
本開示は、以下の例を参照することでより詳細に説明されるが、これは例示を目的としたものであり、本開示の範囲を制限するものとして解釈されるべきではない。特に断りの無い限り、記載されているパーセンテージはいずれも重量(wt%)によるものである。特に断りの無い限り、試験中のコントロールされた攪拌は、攪拌子を用いて200rpmで行った。
製剤調合
少なくとも一つのハロゲン化物イオンソース(1)、少なくとも一つのスルホン酸、及び硝酸イオンまたはニトロシルソース(2)を、撹拌しながら、計算された量の超純脱イオン水(ultra pure deionized water)(DI水)へ加えることにより、エッチング/エッチング液組成物の試料を調製した。均一な溶液が得られた後、任意の添加剤(任意のpH調整試薬を除く)を、使用する場合には、添加した。溶液は平衡化され、必要に応じて、エッチング/エッチング液組成物のpHを測定した。
ビーカーでのエッチング試験
図1に示す材料及びフィーチャを有するNiPtパターン化ウェハを、エッチングテストのためにこれらの重要なフィーチャを有する試験片に切断した。図1では、WFMはワークファンクションメタル(Work Function Metal);PMOSシリコン上のp型シリサイド;及びNMOSはシリコン上のn型シリサイドである。
ビーカーでの材料適合性試験
シリコン基板上に5000Å酸化ケイ素上にブランケットTiN、シリコン基板上にNiPtSi、及びシリコン基板上に5000ÅSiO2上に純Al金属、シリコン基板上にNiPtSiC、シリコン基板上にNiPtSiGe、シリコン基板上にTaN、シリコン基板上にHfO2、シリコン基板上にSiO2、シリコン基板上にSiN、並びにシリコン基板ウェハ上に1000Å酸化ケイ素上にWを、材料適合性試験のために約1インチ×1インチ正方試験片に切断した。最初に、前記試験片の厚さやシート抵抗を、金属膜については4点プローブ、CDE Resmap273によって、誘電体膜についてはWoollam M−2000Xを使って偏光解析法によって測定した。次に、前記試験片は、4インチ長プラスチック製ロッキングピンセットで保持され、その後試験片は、約200mlの本開示に係る前記エッチング組成物を入れた500mlガラスビーカー中に吊るされた。前記組成物の反応性を理由として、これらは2つの構成要素に製剤化され、合一された後に加熱されて使用時に(または、加熱された後に任意に加熱しながら使用時に混合して)前記最終エッチング組成物が出来上がるようにしてもよい。この形式で前記組成物を分割するのは、前記反応性クロリド及びニトラート成分を分けることで前記エッチング溶液の保存可能期間及び貯蔵期間を改善するために行われる。
酸化分析
基板の酸化と洗浄を、X線電子分光法(ESCA)及びSEMPadを使って評価した。NiPtシリサイドの酸化程度のプロファイルは、ESCAによって、膜の上部130オングストロームにわたって広域に約10オングストローム/秒の速度でArイオンエッチングを使って測定した。金属分に富むNixPtySiz上に残留NiPtを含むダイ上の60×100μm長方形構造のSEMPadを使って、残留NiPtの洗浄と下層の金属分に富むシリサイドの酸化を評価した。
CFE1−CFE45
NiPtエッチング応答は、図1に示すように、曝されたTiN、Al、SiON、SiO2、及びNiPtSi層を備える高密度RPG(置換ゲート)ゲートラインアレイを含むパターニングされた基板上を測定した。これらの高密度RPGゲートラインアレイは、厚さ100−350ÅのNiPt層で覆われていた。前記基板は、エッチング前に急速熱アニール(RTA)プロセスに曝されてもよいし、曝されなくてもよい。NiPtエッチング試験は一般的手順2で説明したように実施した。アルミニウム腐食応答は、市販の純Alブランケットウェハで測定した。アルミニウム腐食試験は一般的手順3で説明したように実施した。エッチング試験においては1または2分間、Al腐食試験においては1、2、5または10分間、基板チップを50℃に加温した前記エッチング組成物に浸漬した。エッチング効率は、高密度ゲートラインアレイの一番上に残された残留NiPt量によって、アルミニウム腐食は、アルミニウムのエッチング効率とアルミニウム表面上のピッティング程度によって評価した。結果を表2に示す。
(腐食阻害剤とエッチング試薬の評価)
本開示に係るエッチング組成物においてAl腐食を阻害する能力のあるさまざまな材料、特にスルホン酸についてスクリーニングした。Al腐食について試験した基板は、市販の純Alブランケットウェハである。試験片は、一般的手順2及び3で述べたように処理された。全てのNiPtエッチング試験は2分間の浸漬時間@50℃で行い、全てのアルミニウム腐食試験は5または10分間の浸漬時間@50℃で行った。前記アルミニウム試験片表面について、ブランケットエッチング効率とピッティングの兆候を調べた。結果を表3に示す。
アルミニウム腐食及びNiPtエッチング応答は、前述の例で使用したものと同種の基板を測定した。NiPtエッチング試験及びアルミニウム腐食試験は、一般的手順2及び3で説明したように実施した。NiPtエッチング試験においては1または2分間、Al腐食試験においては5分間、50℃に加温したエッチング組成物に基板試験片を浸漬した。エッチング効率は、高密度ゲートラインアレイの一番上に残された残留NiPt量によって、アルミニウム腐食は、アルミニウムのエッチング効率とアルミニウム表面上のピッティング程度によって評価した。結果を表4に示す。
NiPtエッチング、Al適合性、及びNiPtSi酸化についてのエッチング製剤の評価
本開示に係るエッチング組成物の主成分がNiPtエッチング及びアルミニウム腐食、並びにNiPtSi酸化に与える影響をより深く理解するため、前記主成分の濃度を変更して評価した。NiPtエッチング及びアルミニウム腐食は、前述の例C1−43及び例1−17で使用したものと同種の基板を測定した。NiPtSi酸化応答は、シリコン基板上に〜22nmのNiPtSiを有する基板を、非ドープで(表5A)、またはn−若しくはp−ドープして(表5B)測定した。
例50−60
NiPtエッチング、Al適合性、及びNiPtSi酸化についてのエッチング製剤の評価
下記のエッチング製剤は、一般的手順1に従って調製した。
Au及びPdについてのエッチング製剤の評価
Si基板上のAu膜(例63)及びSi基板上のPd膜(例64)は、製剤FE15を使って一般的手順2のやり方に従ってエッチングされる。製剤15によってエッチングされると、Au及びPd膜は高エッチング効率を示すことが期待される。
Claims (33)
- 以下を含むエッチング組成物:
少なくとも一つのスルホン酸、前記少なくとも一つのスルホン酸は前記組成物の約25重量%〜約95重量%である;
ハロゲン化物アニオンを含む少なくとも一つの化合物、前記ハロゲン化物アニオンはクロリドまたはブロミドであり、前記ハロゲン化物アニオンは前記組成物の約0.01重量%〜約0.5重量%である;
ニトラートまたはニトロシルイオンを含む少なくとも一つの化合物、前記ニトラートまたはニトロシルイオンは前記組成物の約0.1重量%〜約20重量%である;及び
少なくとも約3重量%の水。 - 前記少なくとも一つのスルホン酸が、一般式(1):
化合物を含む、請求項1に記載の組成物。 - R1が、C1−C12の直鎖若しくは分岐鎖のアルキル、またはC3−C12の環状アルキルであって、これらそれぞれが任意にハロゲン、C1−C4のアルキル、スルホン酸、またはC1−C4のアルキル若しくはヒドロキシによって任意に置換されたフェニルである、請求項2に記載の組成物。
- 前記少なくとも一つのスルホン酸が、メタンスルホン酸である、請求項3に記載の組成物。
- 前記少なくとも一つのスルホン酸が、一般式(2):
化合物を含む、請求項1に記載の組成物。 - R2、R3及びR4が、それぞれ独立して、C1−C2のアルキル、Cl、NO2、OH、F、またはCO2Hであり、且つ、nが0、または1である、請求項5に記載の組成物。
- 前記少なくとも一つのスルホン酸が、任意にC1−C12の直鎖若しくは分枝鎖のアルキルまたはSO3Hで置換されるナフタレンスルホン酸を含む、請求項1に記載の組成物。
- 前記組成物が、第一のスルホン酸及び第二のスルホン酸を含む、請求項1に記載の組成物。
- 前記第一のスルホン酸が、一般式(1):
化合物を含む、請求項8に記載の組成物。 - 前記第二のスルホン酸が、一般式(2):
化合物を含む、請求項8に記載の組成物。 - 前記第二のスルホン酸が、一般式(1):
化合物を含む、請求項8に記載の組成物。 - 前記第二のスルホン酸が、任意にC1−C12の直鎖若しくは分枝鎖のアルキルまたはSO3Hで置換されるナフタレンスルホン酸を含む、請求項8に記載の組成物。
- 前記組成物が、60重量%〜約95重量%の前記少なくとも一つのスルホン酸を含む、請求項1〜12のいずれかに記載の組成物。
- 前記ハロゲン化物イオンを含む少なくとも一つの化合物が、塩化水素、臭化水素、塩化アンモニウム、臭化アンモニウム、四級アンモニウムクロリド、四級アンモニウムブロミド、アミン塩酸塩、アミン臭化水素酸塩、窒素系芳香族及び疑似芳香族塩酸塩、窒素系芳香族及び疑似芳香族臭化水素酸塩、ホスホニウムクロリド、ホスホニウムブロミド、金属クロリド、または金属ブロミドを含む、請求項1〜13のいずれかに記載の組成物。
- 前記ハロゲン化物イオンを含む少なくとも一つの化合物が、塩化水素、塩化アンモニウム、臭化アンモニウム、または四級アンモニウムクロリドである、請求項14に記載の組成物。
- 前記組成物が、約0.01重量%〜約0.3重量%の前記ハロゲン化物アニオンを含む、請求項1〜15のいずれかに記載の組成物。
- 前記ニトラートまたはニトロシルイオンを含む少なくとも一つの化合物が、硝酸、硝酸アンモニウム、第四級アンモニウムニトラート、置換されたアンモニウムニトラート、窒素系芳香族及び疑似芳香族と硝酸との反応物、ホスホニウムニトラート、金属ニトラート、塩化ニトロシル、臭化ニトロシル、フッ化ニトロシル、テトラフルオロホウ酸ニトロシル、または硫酸水素ニトロシルを含む、請求項1〜16のいずれかに記載の組成物。
- 前記ニトラートまたはニトロシルイオンを含む少なくとも一つの化合物が、硝酸を含む、請求項17に記載の組成物。
- 前記組成物が、約0.5重量%〜約10重量%の前記ニトラートまたはニトロシルイオンを含む、請求項1〜18のいずれかに記載の組成物。
- 前記組成物が、約3重量%〜約40重量%の水を含む、請求項1〜19のいずれかに記載の組成物。
- 前記組成物のpHが最大でも約2である、請求項1〜20のいずれかに記載の組成物。
- 前記組成物が、60重量%〜約90重量%の前記少なくとも一つのスルホン酸、約0.01重量%〜約0.3重量%の前記ハロゲン化物アニオン、及び約0.5重量%〜約10重量%の前記ニトラートまたはニトロシルイオンを含む、請求項1〜21のいずれかに記載の組成物。
- 前記組成物が、65重量%〜約90重量%の前記少なくとも一つのスルホン酸、約0.01重量%〜約0.2重量%の前記ハロゲン化物アニオン、及び約0.5重量%〜約5重量%の前記ニトラートまたはニトロシルイオンを含む、請求項22に記載の組成物。
- 前記組成物が安定化剤を含まない、請求項1〜23のいずれかに記載の組成物。
- 請求項1〜24のいずれかに記載の前記組成物により、半導体基板上の金属膜をエッチングし;及び
前記エッチングされた金属膜を洗浄溶剤により洗浄すること、を含む方法。 - 前記金属膜は、前記組成物に部分的に曝される、請求項25に記載の方法。
- 前記金属膜は、前記組成物に全体的に曝される、請求項25に記載の方法。
- 前記金属膜は、Pt、Au、Pd、Ir、Ni、Mo、Rh、Re、ランタニド金属、またはこれらの合金を含む、請求項25〜27のいずれかに記載の方法。
- 前記金属膜は、Ni、またはPtとNiとの合金を含む、請求項28に記載の方法。
- 前記洗浄溶剤は、水を含む、請求項25〜29のいずれかに記載の方法。
- 第一の容器に、少なくとも一つのスルホン酸;
第二の容器に、ハロゲン化物イオンを含む少なくとも一つの化合物、前記ハロゲン化物アニオンはクロリドまたはブロミドであり;及び
第三の容器に、ニトラートまたはニトロシルイオンを含む少なくとも一つの化合物、
を含み、
前記第二の容器は、前記第三の容器と異なる、キット。 - 前記第一の容器が、前記第二または第三の容器と同一である、請求項31に記載のキット。
- 前記第一の容器が、前記第二または第三の容器と異なる、請求項31に記載のキット。
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SG192574A1 (en) | 2013-09-30 |
JP6181266B2 (ja) | 2017-08-16 |
TWI553099B (zh) | 2016-10-11 |
KR101938022B1 (ko) | 2019-01-11 |
TW201241158A (en) | 2012-10-16 |
KR20140022006A (ko) | 2014-02-21 |
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