JP7133414B2 - 研磨用組成物 - Google Patents
研磨用組成物 Download PDFInfo
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- JP7133414B2 JP7133414B2 JP2018176459A JP2018176459A JP7133414B2 JP 7133414 B2 JP7133414 B2 JP 7133414B2 JP 2018176459 A JP2018176459 A JP 2018176459A JP 2018176459 A JP2018176459 A JP 2018176459A JP 7133414 B2 JP7133414 B2 JP 7133414B2
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- polishing
- acid
- polishing composition
- abrasive grains
- Prior art date
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- 238000005498 polishing Methods 0.000 title claims description 168
- 239000000203 mixture Substances 0.000 title claims description 97
- -1 amide compound Chemical class 0.000 claims description 80
- 239000006061 abrasive grain Substances 0.000 claims description 50
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 43
- 229910044991 metal oxide Inorganic materials 0.000 claims description 21
- 150000004706 metal oxides Chemical class 0.000 claims description 21
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 19
- 229920005591 polysilicon Polymers 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 125000004974 2-butenyl group Chemical group C(C=CC)* 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
- 125000003373 pyrazinyl group Chemical group 0.000 claims description 4
- 125000004076 pyridyl group Chemical group 0.000 claims description 4
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- 125000004973 1-butenyl group Chemical group C(=CCC)* 0.000 claims description 3
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- 125000000524 functional group Chemical group 0.000 claims description 3
- 125000002883 imidazolyl group Chemical group 0.000 claims description 3
- 125000000555 isopropenyl group Chemical group [H]\C([H])=C(\*)C([H])([H])[H] 0.000 claims description 3
- 125000001786 isothiazolyl group Chemical group 0.000 claims description 3
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- 125000001624 naphthyl group Chemical group 0.000 claims description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 3
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- 125000000714 pyrimidinyl group Chemical group 0.000 claims description 3
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- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 2
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 claims description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 2
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- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 2
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- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 5
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- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 4
- 239000002612 dispersion medium Substances 0.000 description 4
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- 229910052581 Si3N4 Inorganic materials 0.000 description 3
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- 229910021417 amorphous silicon Inorganic materials 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 125000002843 carboxylic acid group Chemical group 0.000 description 3
- 125000002091 cationic group Chemical group 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
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- 125000000962 organic group Chemical group 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- ABLZXFCXXLZCGV-UHFFFAOYSA-N phosphonic acid group Chemical group P(O)(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 3
- 238000000790 scattering method Methods 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- 238000003980 solgel method Methods 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
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- 125000006024 2-pentenyl group Chemical group 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- 238000004438 BET method Methods 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
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- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
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- BEGLCMHJXHIJLR-UHFFFAOYSA-N methylisothiazolinone Chemical compound CN1SC=CC1=O BEGLCMHJXHIJLR-UHFFFAOYSA-N 0.000 description 1
- 125000001421 myristyl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229960003966 nicotinamide Drugs 0.000 description 1
- 235000005152 nicotinamide Nutrition 0.000 description 1
- 239000011570 nicotinamide Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- LJDZFAPLPVPTBD-UHFFFAOYSA-N nitroformic acid Chemical class OC(=O)[N+]([O-])=O LJDZFAPLPVPTBD-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 125000001196 nonadecyl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([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
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 125000001400 nonyl 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])C([H])([H])[H] 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 229960002446 octanoic acid Drugs 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
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 150000002916 oxazoles Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000001139 pH measurement Methods 0.000 description 1
- 125000000913 palmityl 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])C([H])([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
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 125000002958 pentadecyl 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])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
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-N peroxydisulfuric acid Chemical compound OS(=O)(=O)OOS(O)(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-N 0.000 description 1
- 150000004968 peroxymonosulfuric acids Chemical class 0.000 description 1
- 125000005561 phenanthryl group Chemical group 0.000 description 1
- 229960005323 phenoxyethanol Drugs 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 1
- 125000004437 phosphorous atom Chemical group 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 125000004309 pyranyl group Chemical group O1C(C=CC=C1)* 0.000 description 1
- 229960005206 pyrazinamide Drugs 0.000 description 1
- IPEHBUMCGVEMRF-UHFFFAOYSA-N pyrazinecarboxamide Chemical compound NC(=O)C1=CN=CC=N1 IPEHBUMCGVEMRF-UHFFFAOYSA-N 0.000 description 1
- 150000003216 pyrazines Chemical class 0.000 description 1
- 150000003217 pyrazoles Chemical class 0.000 description 1
- 125000003226 pyrazolyl group Chemical group 0.000 description 1
- 125000001725 pyrenyl group Chemical group 0.000 description 1
- 150000004892 pyridazines Chemical class 0.000 description 1
- 229940005657 pyrophosphoric acid Drugs 0.000 description 1
- 150000003233 pyrroles Chemical class 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 125000004079 stearyl 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])C([H])([H])C([H])([H])C([H])([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
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 125000000944 sulfenic acid group Chemical group 0.000 description 1
- 125000000626 sulfinic acid group Chemical group 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 229960003080 taurine Drugs 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 1
- 125000001935 tetracenyl group Chemical group C1(=CC=CC2=CC3=CC4=CC=CC=C4C=C3C=C12)* 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- 125000005033 thiopyranyl group Chemical group 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- GTZCVFVGUGFEME-UHFFFAOYSA-N trans-aconitic acid Natural products OC(=O)CC(C(O)=O)=CC(O)=O GTZCVFVGUGFEME-UHFFFAOYSA-N 0.000 description 1
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-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
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 125000002948 undecyl 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])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229940005605 valeric acid Drugs 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/02—Polishing compositions containing abrasives or grinding agents
-
- 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
- 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30625—With simultaneous mechanical treatment, e.g. mechanico-chemical polishing
-
- 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
- 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
- H01L21/30—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
- H01L21/3105—After-treatment
- H01L21/31051—Planarisation of the insulating layers
- H01L21/31053—Planarisation of the insulating layers involving a dielectric removal step
-
- 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
- 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
- H01L21/30—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
- H01L21/32115—Planarisation
- H01L21/3212—Planarisation by chemical mechanical polishing [CMP]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Description
[砥粒]
本発明の一形態に係る研磨用組成物は、砥粒を含む。
ルシリカが特に好ましい。
本発明の一形態に係る研磨用組成物は、アミド化合物を含み、前記アミド化合物は、カルボニル基と共にπ共役系を形成する基を有する。本明細書中、カルボニル基と共にπ共役系を形成する基を有するアミド化合物を単に「本発明に係るアミド化合物」とも称する。
本発明の一形態に係る研磨用組成物は、分散媒または溶媒を含んでもよい。分散媒または溶媒としては、水が好ましい。不純物による研磨用組成物の他の成分への影響を防ぐ観点から、できる限り高純度な水を使用することが好ましい。具体的には、イオン交換樹脂にて不純物イオンを除去した後フィルタを通して異物を除去した純水や超純水、または蒸留水が好ましい。また、分散媒または溶媒として、研磨用組成物の他の成分の分散性などを制御する目的で、有機溶媒などをさらに含んでもよい。
本発明の一形態に係る研磨用組成物は、pHが7未満である。pHが7以上であると、金属酸化物(例えば、AlOX)膜を高い研磨速度で研磨することができない。
本発明の一形態に係る研磨用組成物は、pHを7未満にするために、pH調整剤を含むことができる。
本発明の研磨用組成物は、必要に応じて、錯化剤、金属防食剤、防腐剤、防カビ剤、酸化剤、還元剤、界面活性剤、水溶性高分子、難溶性の有機物を溶解するための有機溶媒等の他の成分をさらに含んでもよい。以下、好ましい成分である、酸化剤、金属防食剤、ならびに防腐剤および防カビ剤について説明する。
研磨用組成物に添加し得る酸化剤は、研磨対象物の表面を酸化する作用を有し、研磨用組成物による研磨対象物の研磨速度を向上させる。
研磨用組成物中に金属防食剤を加えることにより、研磨用組成物を用いた研磨で配線の脇に凹みが生じるのをより抑えることができる。また、研磨用組成物を用いて研磨した後の研磨対象物の表面にディッシングが生じるのをより抑えることができる。
本発明に係る研磨用組成物に添加し得る防腐剤および防カビ剤としては、例えば、2-メチル-4-イソチアゾリン-3-オンや5-クロロ-2-メチル-4-イソチアゾリン-3-オン等のイソチアゾリン系防腐剤、パラオキシ安息香酸エステル類、およびフェノキシエタノール等が挙げられる。これら防腐剤および防カビ剤は、単独でもまたは2種以上混合して用いてもよい。
本発明の一形態に係る研磨用組成物を用いて研磨する研磨対象物は、特に制限されず、種々の材質および形状を有する研磨対象物の研磨に適用され得る。研磨対象物の材料は、例えばポリシリコン、アモルファスシリコンおよびシリコン単結晶などのシリコン材料;酸化アルミニウム(AlOx)、酸化マグネシウム(MgOx)、酸化ガリウム(GaOx)、酸化ハフニウム(HfOx)、酸化ランタン(LaOx)、酸化ジルコニウム(ZrOx)、酸化セリウム(CeOx)、酸化チタン(TiOx)、MgAlOx、HfMgOxなどの金属酸化物;アルミニウム、ニッケル、タングステン、鋼、タンタル、チタン、ステンレス鋼等の金属もしくは半金属、またはこれらの合金;石英ガラス、アルミノシリケー卜ガラス、ガラス状カーボン等のガラス状物質;アルミナ、シリカ、サファイア、窒化ケイ素、窒化タンタル、炭化チタン等のセラミック材料;炭化ケイ素、窒化ガリウム、ヒ化ガリウム等の化合物半導体基板材料;ポリイミド樹脂等の樹脂材料;等が挙げられる。また、研磨対象物は、上記材料のうち、複数の材料により構成されていてもよい。
本発明の一形態に係る研磨用組成物の製造方法は、特に制限されず、例えば、砥粒および本発明に係るアミド化合物と、必要に応じて他の成分とを、分散媒中または溶媒中で攪拌混合することにより得ることができる。pH調整剤は、研磨用組成物のpHを7未満とするために、適宜用いることができる。したがって、本発明の一実施形態によれば、砥粒およびアミド化合物を混合する工程を有する、上記研磨用組成物の製造方法が提供される。
上述のように、本発明の一形態に係る研磨用組成物は、ポリシリコンおよび金属酸化物を含む研磨用組成物を研磨するために好適に用いられる。よって、本発明の一実施形態によれば、上記研磨用組成物を用いて、ポリシリコンおよび金属酸化物を含む研磨対象物を研磨する工程を有する、研磨方法が提供される。
(実施例1)
砥粒としてアミノ基修飾コロイダルシリカ(平均一次粒径31nm、平均二次粒子径62nm、平均会合度2.0)を、研磨用組成物の総質量を100質量%として、1.75質量%、およびジメチルアクリルアミドを、5mMとなるよう水に添加した。その後、室温(25℃)で30分攪拌混合し、pH調整剤としてマロン酸を用いてpH4.8に調整して、研磨用組成物を調製した。
ジメチルアクリルアミドをニコチンアミドに変更したこと以外は、実施例1と同様にして、研磨用組成物を調製した。
ジメチルアクリルアミドをイソニコチンアミドに変更したこと以外は、実施例1と同様にして、研磨用組成物を調製した。
ジメチルアクリルアミドをピラジンアミドに変更したこと以外は、実施例1と同様にして、研磨用組成物を調製した。
ジメチルアクリルアミドをアントラニルアミドに変更したこと以外は、実施例1と同様にして、研磨用組成物を調製した。
砥粒としてアミノ基修飾コロイダルシリカ(平均一次粒子径31nm、平均二次粒子径62nm、平均会合度2.0)を、研磨用組成物の総質量を100質量%として、1.75質量%となるよう水に添加した。その後、室温(25℃)で30分攪拌混合し、pH調整剤としてマロン酸を用いてpH4.8に調整して、研磨用組成物を調製した。
ジメチルアクリルアミドを2-(ジメチルアミノ)-2-メチル-1-プロパノールに変更したこと以外は、実施例1と同様にして、研磨用組成物を調製した。
ジメチルアクリルアミドをN-メチルアセトアミドに変更したこと以外は、実施例1と同様にして、研磨用組成物を調製した。
砥粒の平均一次粒子径は、マイクロメリティックス社製の“Flow Sorb II 2300”を用いて測定されたBET法による砥粒の比表面積と、砥粒の密度とから算出した。
砥粒の平均二次粒子径は、日機装株式会社製 動的光散乱式粒子径・粒度分布装置 UPA-UTI151により測定した。
研磨用組成物(液温:25℃)のpHは、pHメーター(株式会社 堀場製作所製 型番:LAQUA)により確認した。
研磨用組成物の電気伝導度は、卓上型電気伝導度計(株式会社堀場製作所製 型番:DS-71)により測定した。
ポリシリコンが厚さ5000Åで成膜されたシリコンウェーハ(300mmウェーハ)およびAlOXが厚さ1000Åで成膜されたシリコンウェーハ(300mmウェーハ)を準備し、上記で得られた研磨用組成物を用いて、各ウェーハを以下の研磨条件で研磨し、研磨レートを測定した。
研磨機:REFLEXION(登録商標) LK(アプライドマテリアルズ社製)
研磨パッド:IC1010パッド(ダウケミカル社製)
圧力:2.0psi(1psi=6894.76Pa)
プラテン(定盤)回転数:88rpm
ヘッド(キャリア)回転数:88rpm
研磨用組成物の流量:200ml/min
研磨時間:
60sec(ポリシリコンが厚さ5000Åで成膜されたシリコンウェーハ)
15sec(AlOXが厚さ1000Åで成膜されたシリコンウェーハ)。
研磨レート(Removal Rate;RR)は、以下の式により計算した。
Claims (6)
- 砥粒とアミド化合物とを含有し、pHが7未満である研磨用組成物であって、
前記砥粒は、シリカ粒子であり、
前記アミド化合物は、下記式I:
式I中、
R 1 は、ビニル基、1-プロペニル基、イソプロペニル基、1-ブテニル基、2-ブテニル基、イソブテニル基、イミダゾリル基、ピリジル基、ピラジニル基、ピリミジニル基、ピリダジニル基、チアゾリル基、イソチアゾリル基、フェニル基、ナフチル基、またはアミノフェニル基であり、
R 2 およびR 3 は、それぞれ独立して、水素原子、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、イソブチル基、sec-ブチル基、またはtert-ブチル基である、
で表される、研磨用組成物。 - 前記式I中、R 1 は、ビニル基、ピリジル基、ピラジニル基、またはアミノフェニル基であり、R 2 およびR 3 は、それぞれ独立して、水素原子、またはメチル基である、請求項1に記載の研磨用組成物。
- 前記アミド化合物に含まれるイオン性官能基が1個以下である、請求項1または2に記載の研磨用組成物。
- ポリシリコンおよび金属酸化物を含む研磨対象物を研磨するために用いられる、請求項1~3のいずれか1項に記載の研磨用組成物。
- 前記砥粒および前記アミド化合物を混合する工程を有する、請求項1~4のいずれか1項に記載の研磨用組成物の製造方法。
- 請求項1~4のいずれか1項に記載の研磨用組成物を用いて、ポリシリコンおよび金属酸化物を含む研磨対象物を研磨する工程を有する、研磨方法。
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