TWI299885B - Post chemical-mechanical planarization (cmp) cleaning composition - Google Patents
Post chemical-mechanical planarization (cmp) cleaning composition Download PDFInfo
- Publication number
- TWI299885B TWI299885B TW091102451A TW91102451A TWI299885B TW I299885 B TWI299885 B TW I299885B TW 091102451 A TW091102451 A TW 091102451A TW 91102451 A TW91102451 A TW 91102451A TW I299885 B TWI299885 B TW I299885B
- Authority
- TW
- Taiwan
- Prior art keywords
- acid
- cleaning solution
- cleaning
- ascorbic acid
- copper
- Prior art date
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- 238000004140 cleaning Methods 0.000 title claims abstract description 99
- 239000000203 mixture Substances 0.000 title claims description 49
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims abstract description 82
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229960005070 ascorbic acid Drugs 0.000 claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 33
- 235000010323 ascorbic acid Nutrition 0.000 claims abstract description 32
- 239000011668 ascorbic acid Substances 0.000 claims abstract description 32
- 230000007797 corrosion Effects 0.000 claims abstract description 26
- 238000005260 corrosion Methods 0.000 claims abstract description 26
- 235000004515 gallic acid Nutrition 0.000 claims abstract description 23
- 229940074391 gallic acid Drugs 0.000 claims abstract description 23
- 238000004377 microelectronic Methods 0.000 claims abstract description 21
- 150000001412 amines Chemical class 0.000 claims abstract description 15
- 239000003112 inhibitor Substances 0.000 claims abstract description 14
- 239000000908 ammonium hydroxide Substances 0.000 claims abstract description 9
- -1 monoethylanolamine Chemical compound 0.000 claims abstract description 8
- 150000007524 organic acids Chemical class 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 57
- 229910052802 copper Inorganic materials 0.000 claims description 56
- 239000010949 copper Substances 0.000 claims description 56
- 239000000126 substance Substances 0.000 claims description 33
- 239000012141 concentrate Substances 0.000 claims description 21
- 239000008367 deionised water Substances 0.000 claims description 14
- 229910021641 deionized water Inorganic materials 0.000 claims description 14
- 239000003513 alkali Substances 0.000 claims description 12
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 claims description 10
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 9
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000002585 base Substances 0.000 claims description 6
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims description 6
- CIWBSHSKHKDKBQ-DUZGATOHSA-N D-isoascorbic acid Chemical compound OC[C@@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-DUZGATOHSA-N 0.000 claims description 5
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 5
- ZZZCUOFIHGPKAK-UHFFFAOYSA-N D-erythro-ascorbic acid Natural products OCC1OC(=O)C(O)=C1O ZZZCUOFIHGPKAK-UHFFFAOYSA-N 0.000 claims description 4
- 150000000996 L-ascorbic acids Chemical class 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 4
- 229930003268 Vitamin C Natural products 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 239000012964 benzotriazole Substances 0.000 claims description 4
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 4
- 235000010350 erythorbic acid Nutrition 0.000 claims description 4
- UESSEMPSSAXQJC-UHFFFAOYSA-N ethanol;methanamine Chemical compound NC.CCO UESSEMPSSAXQJC-UHFFFAOYSA-N 0.000 claims description 4
- 229940026239 isoascorbic acid Drugs 0.000 claims description 4
- 235000019154 vitamin C Nutrition 0.000 claims description 4
- 239000011718 vitamin C Substances 0.000 claims description 4
- MIJDSYMOBYNHOT-UHFFFAOYSA-N 2-(ethylamino)ethanol Chemical compound CCNCCO MIJDSYMOBYNHOT-UHFFFAOYSA-N 0.000 claims description 3
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000002211 L-ascorbic acid Substances 0.000 claims description 3
- 235000000069 L-ascorbic acid Nutrition 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- CIWBSHSKHKDKBQ-SZSCBOSDSA-N 2-[(1s)-1,2-dihydroxyethyl]-3,4-dihydroxy-2h-furan-5-one Chemical compound OC[C@H](O)C1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-SZSCBOSDSA-N 0.000 claims description 2
- 239000004318 erythorbic acid Substances 0.000 claims description 2
- 150000003700 vitamin C derivatives Chemical class 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims 2
- HQBYUMGOEJNFJB-UHFFFAOYSA-N 2-aminoethanol;azane Chemical compound N.NCCO HQBYUMGOEJNFJB-UHFFFAOYSA-N 0.000 claims 1
- FZIPCQLKPTZZIM-UHFFFAOYSA-N 2-oxidanylpropane-1,2,3-tricarboxylic acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O.OC(=O)CC(O)(C(O)=O)CC(O)=O FZIPCQLKPTZZIM-UHFFFAOYSA-N 0.000 claims 1
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims 1
- 206010051814 Eschar Diseases 0.000 claims 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims 1
- SWXQKHHHCFXQJF-UHFFFAOYSA-N azane;hydrogen peroxide Chemical compound [NH4+].[O-]O SWXQKHHHCFXQJF-UHFFFAOYSA-N 0.000 claims 1
- 231100000333 eschar Toxicity 0.000 claims 1
- 239000004021 humic acid Substances 0.000 claims 1
- 150000005622 tetraalkylammonium hydroxides Chemical class 0.000 claims 1
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 abstract description 48
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 125000001453 quaternary ammonium group Chemical group 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 97
- 235000012431 wafers Nutrition 0.000 description 33
- 238000004630 atomic force microscopy Methods 0.000 description 20
- 238000000034 method Methods 0.000 description 18
- 238000012360 testing method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 12
- 238000004070 electrodeposition Methods 0.000 description 10
- 238000005498 polishing Methods 0.000 description 10
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 description 5
- 238000007654 immersion Methods 0.000 description 5
- 229940079877 pyrogallol Drugs 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000003749 cleanliness Effects 0.000 description 4
- 238000011109 contamination Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 230000005764 inhibitory process Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical group O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 3
- 229920002120 photoresistant polymer Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- DVUVKWLUHXXIHK-UHFFFAOYSA-N tetraazanium;tetrahydroxide Chemical compound [NH4+].[NH4+].[NH4+].[NH4+].[OH-].[OH-].[OH-].[OH-] DVUVKWLUHXXIHK-UHFFFAOYSA-N 0.000 description 3
- 229910052902 vermiculite Inorganic materials 0.000 description 3
- 235000019354 vermiculite Nutrition 0.000 description 3
- 239000010455 vermiculite Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 235000006708 antioxidants Nutrition 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 1
- 241000446313 Lamella Species 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- LIWAQLJGPBVORC-UHFFFAOYSA-N ethylmethylamine Chemical compound CCNC LIWAQLJGPBVORC-UHFFFAOYSA-N 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 229940085942 formulation r Drugs 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012771 household material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical group [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- 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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/02068—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers
- H01L21/02074—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers the processing being a planarization of conductive layers
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/38—Cationic compounds
- C11D1/62—Quaternary ammonium compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/0005—Other compounding ingredients characterised by their effect
- C11D3/0073—Anticorrosion compositions
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/26—Organic compounds containing nitrogen
- C11D3/28—Heterocyclic compounds containing nitrogen in the ring
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/26—Organic compounds containing nitrogen
- C11D3/30—Amines; Substituted amines ; Quaternized amines
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/26—Organic compounds containing oxygen
- C11D7/261—Alcohols; Phenols
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/26—Organic compounds containing oxygen
- C11D7/265—Carboxylic acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3209—Amines or imines with one to four nitrogen atoms; Quaternized amines
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3218—Alkanolamines or alkanolimines
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3245—Aminoacids
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/32—Organic compounds containing nitrogen
- C11D7/3254—Esters or carbonates thereof
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
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Description
1299885 A7 B7 五、發明説明(1 ) 發明領域 本發明一般而言係關於後段化學機械平整化(post chemical-mechanical polishing, post-CMP) 清潔 製程之 領域, 特別是 有關一 種用於含銅微電子基材之後段化學機械平整化清潔溶液。 先前技藝 目前,半導體元件的製造是複雜而多階製程,化學機械 平整化是現階段普遍用於多數半導體之不同基材的平坦化 操作中、以生產設計線路小於0.35微米的元件之技術。 化學機械平整化方法係涉及在經控制之化學品、壓力和 溫度條件狀態下固定及旋轉一面對濕的研磨表面之薄片狀 半導體基材。化學研磨液包含研磨劑,例如鋁土或矽石用 為研磨料。另外,化學研磨劑包含選擇性化學物質,其可 於製程中蝕刻不同基材的表面。於拋光過程中結合化學性 和機械性之移除作用可造成物質表面之較佳平坦化。 然而,化學機械平整化製程往往於半導體基材之表面造 成污染,比污染包括來自研磨液的研磨顆粒,如鋁土或矽 石與添加到研磨液中之可反應性化學物品。另外,污染層 也可能包含研磨液和研磨表面的反應產物。於該半導體基 材之後續加工之前,必須先移除污染物,以壞點之產生, 其導致產能之降低。因此,後段化學機械平整化清潔溶液 已發展至可清除經化學機械平整化後基材表面的殘留物。 以氫氧化銨為基底之鹼性溶液,係傳統上使用於後段化 學機械平整化清潔之應用中。至今,大多數之化學機械平 整化應用係針對铭、鐫、麵和含氧表面而言。 O:\76\76627-920922.DOC\ 4 * 4 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐) 1299885 A7 B7 五、發明説明(2 然而、,在半導ft㈣線製造過財,料漸成為選擇之 #料。於此等製程中,係以銅置換鋁作域擇之金屬 統後段化學機械平整化製程無法完全清潔含銅的表面, 自、銅殘留物和漿液顆粒係存在於銅表面及其他在化學機 平整化操作後外露的表面而造成污染。崎染會迅速擴 散至碎晶層、二氧化梦層及其他介電材質中。因此,必續 去除來自所有曝露表面包含晶圓背面之污染,以避免元件 的缺陷。 傳統上對以鋁土或矽石為基礎的化學機械研磨製程有效 <後段化學機械平整化清潔溶液,對於含銅的表面及無 效,銅很容易被此等清潔溶液所侵蝕。此外,目前後段化 學機械平整化的潔淨率也無法達到要求標準。
Nam所擁有之美國專利第5,863,344號係揭露一種用於半導 fa元件的清潔溶液,其包含氫氧化四甲銨、醋酸和水,此 落液較佳係包含一比例範圍自約i至約5 〇體積比之醋酸和 氫氧化四甲銨。
Ward所擁有之美國專利第5,597,42〇號揭露一用於清潔基材 之有機和無機成分之去除水性組合物,其不會腐蝕或溶解 基材上之金屬線路,此揭露之溶液組成包含7 〇 _ 9 5 wt%之 單乙醇銨和約5 wt%之腐蝕抑制劑,例如兒茶酚、焦掊酚 或五倍子酸。
Ward所擁有之美國專利第5,709,756號係揭露一種清潔組合 物,其包含約25-48 wt%之氫氧胺、1-2 0 wt%之氟化銨 和水,該溶液的pH值係大於8,此溶液可進一步包括一腐 I _O:\76\76627-920922.DOC\ 4 - 5 - 本紙張尺;ΐ適用中國國家標準(CNS) A4規格(210X297公奢 1-- 1299885 A7 B7 五、發明説明(3 蝕抑制劑,例如五倍子酸、兒茶酚或焦掊酚。
Hardi等人之美國專利第5,466,389號揭露一種清潔微電子基 材之水性鹼性清潔溶液,該清潔溶液包含一金屬離子游離 之鹼性成分,例如四級化氫氧化銨(最高25 wt%),一非 離子性界面活性劑(最高5 wt%),及一PH值調節成分,例 如醋酸,以控制p Η值介於8 -1 0之間。
Schwartzkopf等人之歐洲專利第〇647884Α1號揭露一光阻去除 劑,其包含抑制劑以降低金屬腐蝕。此篇專利教示使用抗 壞血酸、五倍子酸、焦掊酚等,以控制含鹼金屬之金屬腐 蝕之控制。 頒予Satoh等人之美國專利第5,143,648號揭露使用新穎之抗 壞血酸衍生物作為抗氧化劑,此專利併入本發明中以供參 考。 業界仍需要一種用於含銅表面之後段化學機械平整化清 潔組合物,此等後段化學機械平整化清潔組合物必須可= 實從標的表面將顆粒移除,同時避免含銅基材之侵蝕。此 等後段化學機械平整化清潔組合物亦必須對後段化學機械 平整化製程具有耐受性。此等後段化學機械平整化須具備 經濟效益、工作效率,並可使用於廣泛的溫度範圍下。、此 後段化學機械平整化清潔組合物亦應包括鋁或碎基質的研 本發明揭-種用於清潔含銅微電子基材之水性清潔:容 液,其包含-四級化氫氧化録、一極性有機胺、一腐錢抑 O:\76\76627-920922.DOC\ 本紙張尺度適用中國國家標^^11規格(21〇 X 297¾ -6 - 1299885 A7 ___B7 1、發明説明(4~) " ' 制劑、及去離子水。 抗壞血酸使用廣泛,當使用清潔含銅微電子基材之鹼性 各液中’具有良好腐蚀抑制性,本發明中發現添加一有機 酸,例如五倍子酸,可促進組合物之清潔性質,却不會影 響抗壞血酸作為腐蝕抑制劑之效果,因此,於某些應用 中,使用者可斟酌添加五倍子酸到清潔組合物中。 本發明係有關一種用於清潔含銅微電子基材之清潔溶 液’其包含有四級化氮氧化按’可選自由氯氧化四燒按, 其中燒基之碳原子數為1 - 1 〇,或是上述之混合物所組成之 群;一有機胺,可選自由單乙醇銨、胺乙基乙醇胺、甲基 胺乙醇、胺乙氧乙醇、二乙醇胺、三乙醇胺、碳原子數2-5之醇胺以及上述之混合物所組成之群;少許之有機酸如 五倍子酸;一腐蝕抑制劑,可選自由抗壞血酸、L( + )抗壞 血酸、異抗壞血酸、抗壞血酸衍生物、兒茶酚、焦掊酚、 間苯二酚、對苯二酚、苯并三唑及上述之混合物所組成之 群。該清潔溶液之鹼濃度係大於0.073百萬當量鹼/每克。 本發明係有關一種清潔含銅微電子基材之清潔溶液,其 包含a)氫氧化四烷銨,b)單乙醇銨,c)五倍子酸,d)抗壞 血酸,及去離子水,該清潔溶液之鹼濃度大於0.073百萬當 量驗/每克。 較佳地,氫氧化四烷銨於此清潔溶液中之含量係自約 0.15 wt%至約1·25 wt%,單乙醇銨之含量係自約0.2 wt%至 約2.25 wt%,五倍子酸之含量係自約〇·;[ wt%至約〇.4wt%, 抗壞血酸之含量係自約〇·1〇 w t %至約0.9 w t %,其餘為去離 O:\76\76627-920922.DOO 4 - 7 - -.....--------- - --- 本紙張尺度適用中國國家標準(CNS) Α4規格(210 X 297公釐) 1299885 A7 B7 五、發明説明(5 ) 子水。 本發明亦提供一種清潔含銅微電子基材之清潔溶液濃縮 組合物,該濃縮組合物包括氫氧化四烷銨,其含量為自約 1.8 wt%至約12.4 wt%,單乙醇銨之含量為自約2.0 wt%至約 27.8 wt%,五倍子酸之含量自約0 wt%至約4.0 wt%,抗壞 血酸之含量為自約1.0 wt%至約10.9 wt%,其餘為去離子 水。本發明提供一種清潔溶液,其包括使用含量自約1.5 wt%至約12.5wt%之濃縮液,並以去離子水稀釋。 圖示簡單說明 圖1係於面積為10 # m X 10 # m、沉積在基材上之電化學部 分拋光的銅上進行之原子力顯微鏡(atomic force microscopy, AFM)掃描之結果。圖2係於面積為10 /z m X 10 /z m、經本發 明之溶液處理之圖1晶圓上進行之原子力顯微鏡(AFM)掃描 結果。 圖3係於面積為1 0 # m X 10 μ m、經本發明之溶液處理之 圖1晶圓上進行之原子力顯微鏡(AFM)掃描結果。 圖4係於面積為10 // m X 10 /z m、經本發明之溶液處理之圖 1晶圓上進行之原子力顯微鏡(AFM)掃描結果。 圖5係於面積為10 /z m X 10 // m、於使用本發明之組合物處 理之前的介層窗上進行之原子力顯微鏡(AFM)掃描結果。 圖6係於面積為10 # m X 10 // m、於使用本發明之溶液處理 後的圖5之介層窗上進行之原子力顯微鏡(AFM)掃描結果。 圖7為以本發明之清潔組合物處理前及處理後於晶圓上 的顆粒計算測試之數據代表。 O:\76\76627-920922.DOC\ 4 - 8 ~ 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 1299885 A7 B7 五、發明説明( 圖8為經由本發明清潔溶液處理前及處理後之晶圓顆粒 計算度量。 圖9為於使用本發明之組合物處理之前、介層窗結構之 電子顯微鏡(SEM)掃描之影像。 圖10為於使用本發明之組合物處理之後、介層窗結構之 電子顯微鏡(SEM)掃描之影像。 發明之詳細說明 本發明係提供一種於化學機械平整化製程後、用以清潔 含銅之微電子基材清潔溶液,於化學機械平整化製程後清 潔含銅之微電子基材通常稱為、、後段化學機械平整化銅潔 淨夕。於本文中,應明瞭該用語、、含銅微電子基材〃係指 經製造以供微電子、積體電路或電腦晶片應用之基材表 面’其中基材係包括含銅成分。含銅成分可包含,例如, 金屬内連線,其大多為銅或銅合金。須明白,微電子表面 f可由半導體材質所組成,例如氮化欽、艇、歛化鶏,彼 等係以作為銅擴散障壁金屬,及矽或其他介電物質。通常 一含銅微電子基材係包括顯著量的銅,此量亦包含銅内連 線。 本發明的清潔溶液可應用在製造微電子基材過程之任何 清潔操作中,例如半導體晶圓。尤其特別地,此等清潔應 用包括後段介層窗結構和後段化學機械平整化製程。傳統 製造半導體晶圓須歷經多道平整化步驟,在平整化步驟之 後除去剩餘產物。 本發明之清潔溶液係包含四級化氫氧化銨、一有機胺、 O:\76\76627-920922.DOC\ 4 - 9 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐) 1299885 A7 ___________B7 五、發明説明(7 ) 一有機酸、一腐蝕抑制劑,其餘為水。該四級化氫氧化銨 可選自由氫氧化四烷銨、其中烷基可包含1-1〇之碳原子數 者所組成之群。此溶液中之四級化氫氧化銨含量係自約 〇·15 wt% 至約 ι·75 wt% 之間。 该極性有機胺係選擇自由單乙醇銨、胺乙基乙醇胺、甲 基胺乙醇、胺乙氧乙醇、二乙醇胺、三乙醇胺、碳原子數 2 - 5之醇胺以及上述之混合物所組成之群。此溶液之極性 有機胺含量係自約0.25 w t %至約27.5 w t %之間。 孩有機酸為五倍子酸,其含量係自約〇1 wt%至約〇.4 w t %之間。 該腐蝕抑制劑係選自由維生素C、L(+)維生素C、異維 生素C、維生素C衍生物、兒茶酚、焦掊酚、間苯二酚、 對苯二酚、苯并三唑及上述之混合物所組成之群。此溶液 中之腐蚀抑制劑含量係自約o.lwt%至約i wt%之間。所欲 者係獲得最if化之腐ϋ程度、然使晶圓表面之潔淨達到最 有效化,此可藉由將殘留銅和其他污染從表面移除而達 成。因此,為達最理想之潔淨效果,此方法通常在晶圓表 面上造成輕微的銅損失,但仍可保持晶圓的電特性。 菽溶液的鹼性濃度係大於0073百萬當量鹼/每克。 抗壞血酸和其料物係廣泛運用於食物及藥品中作為抗 氧化劑,彼等經發現可成功地抑制金屬或金屬合金,在水 溶液或溶劑環境下被腐蚀,如同許多專利說明書中所揭 示。本發明中之抗壞血酸和其他成分皆係商業上可容易獲 O:\76\76627-920922.DOC\ 4 本、紙張尺度適用中國國家標準(CNS) Α4規格(2.1G X 297公着y 1299885 A7
本發明之清潔溶液之一項重要特爭為該非水性組合物 (除了水以外之組份)於溶液中係以少量存在,此由於可便 宜地調配出有效之清潔溶液而構成一經濟上之優點,尤 其,在後段化學機械平整化製程中該清潔溶液中必須大量 使用,因此更顯重要。 根據本發明之一項具體實施態樣,係提供一種可在需要 時稀釋成清潔溶液之濃縮組合物。本發明之濃縮組合物 (或指”濃縮液”)可使化學機械平整化之製程工程師方便 地’例如’视需要將濃縮液稀釋至適當的強度和鹼度。濃 縮液因具有較長的半衰期而有利於產品船運和儲藏。 本發明之濃縮液較佳係包含TMAH,其含量範圍係自約 1.8wt%至約124wt%,MEA,其含量範圍係自2〇 wt%至約 27.8 wt%,五倍子酸,其含量範圍係自約〇1 wt%至約 wt% ’抗壞血酸,其含量範圍係自約1〇 wt%至約ι〇·9 wt% ’及其為水(較佳係去離子水)。 此外’本發明之濃縮液也包含一金屬螯合劑,以進一步 避免晶圓表面非理想之金屬污染物沉積,已知之用於鋅、 銅' I、鐵等之金屬複合劑使可加入該組合物中。另外, 亦已知在許多案子中,腐蝕抑制劑之保護金屬當量係與有 機錯合物形成劑之錯合物形成能力有關。 本發明之濃縮液較佳係經稀釋後使用於後段化學機械平 整化製程中,其係藉由添加去離子水已構成一濃度為介於 自約1.5 wt%至約12.5 wt%之間的清潔溶液。本發明之清潔 溶液可於介於室溫至7 〇 t之溫度範圍下用以潔淨微電子基 O:\76\76627-920922.DQC\ 4 I紙張尺度適财關家料(CNS)A4_21()x挪公董) 1299885 A7 B7 五、發明説明(9 材,通常,隨溫度之增加可促進潔淨度。 該溶液的鹼性濃度係大於0.073百萬當量鹼/每克,更佳係 該溶液的鹼性濃度為大於0.091百萬當量鹼/每克。在潔淨操 作期間,鹼性濃度大於0.073時,可於基材表面得到一負值 Γ電位。 本發明之清潔溶液符合後段化學機械平整化應用中廣泛 接受之工業清潔操作標準,通常工業清潔標準係以顆粒計 算,於200毫米尺寸之晶圓中,除了邊角5毫米之外,表面 應具有少於20顆大於0.2微米之顆粒。 本發明之清潔溶液並不需要界面活性劑,然並不排除其 於特殊應用中之使用。 本發明之清潔溶液可以大量不同之傳統清潔工具使用, 包括 Verteq單晶中間相金手指(Verteq single wafer megasonic Goldfinger)、OnTrak系統、DDS(雙邊洗滌器)、SEZ單晶旋轉洗 器(SEZ single wafer spin wash)及中間相批次濕式椅狀系統 (megasonic batch wet bench system)。 本發明之清潔溶液可成功地使用於含銅、鈕及/或矽的 表面。 注意的是,介層窗潔淨也是本發明清潔溶液的應用之 一,介層窗是一蝕刻在微電子基材上之孔洞,其係以提供 連接金屬層之管道,使用氣體蝕刻劑蝕刻基材表面係形成 一介層窗,該基材通常為介電材質形成,例如氟矽玻璃 (FSG)。蝕刻步驟後,存於基材表面和介層窗中殘留物必 須移除’殘留物通常為邊井鬲分子(side wall polymer),亦可 _O:\76\76627-920922.DQC\ ^ - 12 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐) 1299885 A7 B7
1299885 A7 B7 五、發明説明(Η ) 程度加以排序。 結果顯示於表I中。 表I 浸泡比較測試 胺 TMAH (wt%) 胺 (wt%) 抗壞血酸 (wt%) 五倍子酸 (wt%) 鹼濃度滴定 (每克溶液百 萬當量) 相對 順序 1 ME A 0.5 0.9 0.2 喔师 0.191 1 2 MEA 0.5 0.9 0.35 麵 0.182 2 3 MEA 0.5 0.9 讎 0.35 0.182 3 4 NMEA 0.5 0.9 0.35 0.154 4 5 MEA 0.5 0.9 細·· 0.1 0.196 5 6 HA 0.66 0.3 雄筆 0.233 0.235 6 7 HA 0.66 0.6 嫌·晒 0.233 0.284 7 8 HA 0.33 0.3 •睡· 0.467 0.122 8 9 HA 0.33 0.6 0.467 0.171 9 10 國 麵 祕•確 … 0.485 10 11 麵娜 鑛嫌一 _· NA 11 結果顯示本發明之較佳實施態樣(溶液i和溶液2)表現最 佳,本發明之所有清潔溶液皆優於習知技藝之清潔溶液 (溶液1 0和溶液1 1)。 實施例2 O:\76\76627-920922.DOC\ 4 ~ 14 - 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 1299885 A7 B7 五、發明説明(12 ) 清潔溶液(A至H)係針對彼等腐蝕銅之傾向加以評估。 溶液 A 係由 〇.9 wt% MEA、0.5 wt% TMAH及0.35 wt%( L)-抗壞血 酸所構成。溶液 B 係由 0.9 wt% MEA、0.5 wt% ΤΜΑΉ和0.18 wt% (L)-抗壞血酸及其餘為去離子水所構成。溶液C係由溶於 水中之0.5 wt% TMAH所構成。溶液D係由溶於水中之0.9 wt% MEA所構成。溶液 E 係由 0.9 wt% MEA、0.5 wt% ΤΜΑΗ、0·35 w t %五倍子酸及剩餘為水所構成。溶液F係由〇·9 wt% MEA、 0.5 wt% TMAH、0.18 wt%苯并三唑及剩餘為水所構成。由一 整片經電化學沉積(ECD)銅晶圓(部分拋光)獲得具有均一 長度和寬度之銅剥除片,其係於週遭環境條件下置於200毫 升樣本清潔溶液中並攪拌2分鐘,接著,該銅晶圓係自清 潔溶液中取出,放以去離子洗滌,並以氮氣乾燥。銅晶圓 剝除片以肉眼審查顏色變化和光澤損失。此二者皆為腐蝕 作用之證據,經處理之銅晶圓利用原子力顯微鏡(AFM)測 試以評估表面腐蝕情形。 腐餘結果列於表11中。 O:\76\76627-920922.DOC、4 - 15 ~ 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 1299885 A7 B7 五、發明説明(l3 ) 表II 腐蝕測試數據 組合物 基材 測試方法 結果 銅(電化學沉積’ 部分拋光) 原子力顯微鏡 RMS=0.8,研磨後輕微 腐蚀。 溶液A 銅(電化學沉積, 部分抛光) 原子力顯微鏡 RMS=1.0,輕度腐蝕, 輕度銅受損。 溶液B 銅(電化學沉積, 邵分抛光) 原子力顯微鏡 RMS=1.1,輕度腐蝕, 輕度銅受損。 落液C 銅(電化學沉積, 部分抛光) 原子力顯微鏡 RMS=0.9,輕微腐蝕, 中度銅受損。 溶液D 銅(電化學沉積, 部分抛光) 原子力顯微鏡 RMS=3.4,輕微腐蝕, 中度銅受損。 溶液E 銅(電化學沉積’ 邵分抛光) 原子力顯微鏡 RMS=3.5,輕微腐蝕, 中度銅受損。 溶液F 銅(電化學沉積’ 部分据光) 原子力顯微鏡 RMS=NA,以 BTA 將 表面修飾。 溶液G(l) 銅(電化學沉積’ 邵分掘光) 原子力顯微鏡 RMS=1.3,輕度腐蝕, 輕微銅受損。 溶液H(2) 銅(電化學沉積’ 部分抛光) 原子力顯微鏡 RMS=3.8,輕微腐蝕, 中度銅受損。 *RMS=以原子力顯微鏡測試之平方根估計值。 (1) 以氫氟酸為緩衝溶液。 (2) 1.7wt% 之 NH4OH於水中。 表II中之數據顯示本發明較佳實施態樣溶液A具有良妤 的銅腐蝕保護性。溶液A和溶液B具有不同濃度之腐蝕抑 制劑濃度含量。 實施例中之原子力顯微鏡掃描結果,平方根估計數據係 顯示於圖1 - 4中,其中圖1為未經電化學沉積之銅晶圓,圖 O:\76\76627-920922.DOC\ 4 ~ 16 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐) 1299885 A7 B7 五、發明説明(14 ) 2為相同晶圓曝露於溶液A中,圖3為電化學處理之晶圓曝 露於溶液B中,圖4為電化學處理之晶圓曝露於一含有0.9 wt% MEA、0.5 wt% TMAH、0.35 wt%五倍子酸、且其餘為水之 溶液中。 實施例3 製備一系列之清潔溶液以評估TMAH、MEA、抗壞血酸於 水性清潔溶液中之相關性,清潔溶液之製備係以TMAH、 MEA、抗壞血酸和去離子水混合.,例如TMAH濃度為0.5 wt%、MEA濃度分別從0 wt%-0.9 wt%、抗壞血酸濃度分 別從0 w t % - 0.35 w t %、其餘為去離子水。測試溶液係如表 III所示製備,經製備之清潔溶液係根據如實施例1所示之 玻片浸泡測試步騾評估其清潔功效。
裝 結果顯示於表III中。 表III 組合物 A B C D E F G TMAH(wt% ) 0.5 X X 0.5 0.5 X 0.5 MEA(wt%) 0 0.9 X 0.9 X 0.9 0.9 抗壞血酸 (wt%) X X 0.35 X 0.35 0.35 0.35 水(wt%) 99.50 99.10 99.65 98.60 99.15 98.75 98.25 含驗量(每克 溶液百萬當 量) 0.055 0.147 -0.020 0.202 0.035 0.127 0.182 浸泡測試等 級* 3 5 5 3 5 5 1 1 =優良,3 =—般,5 =不良。 訂
O:\76\76627-920922.DOC\ 4 - 17 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 1299885 A7 B7 五、發明説明(15 結果顯示在浸泡測試中之最佳清潔溶液為係含有TMAH、 MEA和抗壞血酸者(溶液g)。未包含所有此等組成之溶液 則表現不佳。由結果推測當TMAH、MEA和抗壞血酸同時存 在於清潔溶液中時,可表現協乘清潔功效,特別係於最佳 含量狀態下。 實施例4 製備一種根據本發明之清潔溶液,其包含1〇Ό加% TMAH、18.0_wt%%MEA、7.0 wt%抗壞血酸、及其餘為水。 經邵分蚀刻之晶圓係經沉浸於該溶液中3 〇分鐘、溫度保持 於70 °C,以去離子水沖洗約}分鐘,再利用氮氣乾燥。圖$ 顯示在原始晶圓表面之1微米尺寸介層窗之原子力顯微鏡 截面分析結果’介層窗輪廓深度約4 〇 〇 n m。蚀刻後,此介 層窗之橫截面觀察可清楚看出顯著量之殘留高分子之存 在。 圖6顯示相同類型的1微米尺寸介層窗經由上述溶液處理 後之原子力⑬員彳政1¾截面分析結果,此介層窗之橫截面觀客 顯示具有非常淺的輪廓(平均80nnl),該介層窗深度輪廊 處理前後之比較,係經由將光阻層從晶圓表面移除而評 估,估計約300nm厚。介層窗底部(圖6)的矩形輪廓亦顯示 可利用上述溶液將側壁高分子移除。此等結果顯示較佳實 施悲樣係針對介層窗清潔和光阻層去除之有用組合物。、 實施例5 測試兩組溶液之後段化學機械平整化清潔應用效果,溶 液 I (0.45 wt% MEA、0.25 wt% TMAH、0.175抗壞血酸、其餘二 -18- O:\76\76627-920922.DOC\ 4 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 1299885 A7 B7 五、發明説明(16 ) 水),溶液 11 (0.45 wt% MEA、0·25 wt% TMAH、0.175 w t % 抗壞血 酸、其餘為水),針對清潔測試利用一 Cobra-VcS station在 TE0S晶圓對照,和之後浸泡在Olin Arch 10K研磨溶液相比 較。圖7至8顯示利用溶液I和溶液II清潔晶圓後,使用 KLA-Tencor儀器測得之顆粒含量。很清楚地,本發明之較佳 組合物(溶液II)具有較佳之潔淨效果。 實施例6 製備分別稀釋至1.25 wt%、1.33 wt%、2.5 wt%、5 wt%之濃 縮溶液並加以評估,經部分平整化之電化學沉積銅晶圓係 於兩種不同溫度下(22 °C和50°C)分別沉浸在這些清潔溶液 中3 0分鐘,針對此等片狀物進行處理前後的片層抗性之四 點碳針測試,計算溶液之銅蝕刻速率。濃縮液A為1 0 wt% TMAH、18 wt% MEA、7.0 wt %抗壞血酸、其餘為水。濃縮液 B 為 10.0 wt% TMAH、18 wt% MEA、7.0 wt%抗壞血酸、其餘為 水。結果以埃/每分鐘表之,如表IV所示。 O:\76\76627-920922.DOC\ 4 ~ 19 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐) 1299885 A7 B7 五、發明説明(17 ) 表IV 濃縮組合物A 濃縮組合物B 濃縮液(wt%) 蝕刻速率於 於50°C之蝕 於22°C之蝕 於50°C之蝕 22〇C 刻速率 刻速率 刻速率 1.25 4.52 23.35 22.05 88.39 1.665 9.24 23.58 19.66 118.91 2.5 0.55 24.68 28.86 161.39 5 0.00 13.91 27.82 234.20 從表IV中清楚得知濃縮液組成A比組成B具有較佳腐蝕 抑制性。 實施例7 依照實施例6中方式製備兩種分別稀釋至12.5 wt%和50 wt%之濃縮液,經部分平坦化電化學沉積之銅晶圓係經沉 浸至此溶液中10分鐘,溫度並保持在(22°C),針對此等片 狀物進行處理前後的片層抗性之四點碳針測試,片層抗性 之變化係以每平方公分百萬歐母計之記錄於表V中。 表V 片層抗性變化 濃縮液(wt%) 濃縮組合物A 濃縮組合物B 12.5 -0.0015 0.1742 50 -0.0994 0.3307 從表V中清楚得知濃縮液組成A比組成B具有較佳之腐蝕 O:\76\76627-920922.DOC\ 4 ~ 20 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐) 1299885 A7 __ B7_____ 五、發明説明(18 ) 抑制性,濃縮液組成亦顯示非可預期之效果,即,片層抗 性之減少。 實施例8 製備一系列清潔液組合物,以評估抗壞血酸和五倍子酸 配以TMAH和MEA濃度之相關性,分別固定〇·25 wt% TMAH和 0.45 wt% MEA含量於水性清潔溶液中,評估清潔溶液潔淨效 能之方式係如實施例1所示,評估清潔溶液對銅腐蝕性傾 向之數據之方式係如實施例2所示,變異性係如表VI所 示。 ------- 表 腐蚀和淨:A VI 包測試數據 調配物 抗壞血酸 五倍子酸 RMS(平方 根)5分鐘浸 泡 RMS(平方 根)30分鐘 浸泡 浸泡測試 對照銅 0 0 1.167 X P 0.175 0 1.736 1.290 2 Q 0.131 0.044 1.996 2.578 1 R 0.088 0.088 1.956 7.679 1 S 0.044 0.131 2.634 8.804 1 所有上述調配物均具有可接受之潔淨效能,調配物R和 調配物S的腐蝕抑制性較不明顯。 實施例9 將兩種濃縮液(A-10.0 wt% TMAH、18 wt% MEA、7.0 wt%抗壞 血酸、其餘為水,B 10 wt% TMAH、18 wt% MEA、7·0 wt%五倍 子酸、其餘為水)稀釋至5 0 wt%。銅晶圓介層窗係沉浸於 O:\76\76627-920922.DOa 4 - 21 - 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 1299885 A7 B7 五、發明説明(19 ) 溶液中,維持5 0 °C之溫度下1分鐘,樣品於測試前後以電 子顯微鏡掃描,以決定潔淨程度、基材損害情形,其中濃 縮液組成B並不能完全將晶圓之污染物加以清除。圖9顯示 對照組處理之介層窗結構,圖1 0顯示稀釋至5 0 wt%之濃 縮組合物A的潔淨情形。 以上所述僅以說明本發明之較佳實施例,然本發明並非 限定於上面所示與所描述之特定具體實施態樣,本發明欲 獲得之保護係如申請專利範圍中所列。 O:\76\76627-920922.DOC\ 4 - 22 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐)
Claims (1)
- I29m^ 本丨 A8 B8 C8 D8".ν ; -, 〆-· ·" - v.r-^ 去「申首聿村範圍1————一 1. 一種用.於含銅微電子基材之清潔溶液,該清潔溶液包 含: 0.05 wt%-12.4 wt%之四級化氫氧化銨,其係選自由其中 之烷基碳原子數為1 -1 0氫氧化四烷銨及其上述之混合物 所組成之群; 0.2 wt%-27.8 wt%之極性有機胺,其係選自由單乙醇銨、 胺乙基乙醇胺、甲基胺乙醇、胺乙氧乙醇、二乙醇胺、 三乙醇胺_、碳原子數2 - 5之醇胺以及上述之混合物所組 成之群; 0.1 wt%-1.0 wt%之有機酸,其係為五倍子酸; 有效量的腐姓抑制劑,其係選自由維生素C(ascrobic acid)、L ( +)維生素 C、異維生素 C (isoascorbic acid)、維生 素C衍生物、兒荼驗(catechol)、焦掊紛、間苯二酉分 (resorcinol)、對苯二驗(hydroquinone)、苯并三也、擰檬酸 (citric acid)、乙二胺四乙酸(ethylenediamine tetraacetitic acid, EDTA)及上述之混合物所組成之群; 其餘為去離子水;以及 其中該清潔溶液之鹼濃度含量係大於0.073百萬當量鹼 /每克。 2. —種使用於含銅微電子基材之清潔溶液,該清潔溶液包 含: 1 . 0.05 wt%-12.4 wt%之四級化氫氧化铵; 2 . 0.2 wt%-27.8 wt%之單乙醇銨; 3. 0.1wt%-4 wt%之五倍子酸; O:\76\76627-920922.DOC\ 5 ~ 1 * 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐) 1299885 A8 A8 B8 C8 D8 六、申請專利範圍 4. 0.2wt%-10.9wt%之抗壞血酸;以及 5 .去離子水; 其中該清潔溶液之鹼濃度含量大於0.073百萬當量鹼/ 每克。 3. 如申請專利範圍第2項之清潔溶液,其中該清潔溶液之 鹼濃度含量係大於0.073百萬當量鹼/每克。 4. 如申請專利範圍第1項之清潔溶液,其中該腐蝕抑制劑 係選自由技壞血酸、L -抗壞血酸、異抗壞血酸和抗壞血 酸衍生物所組成之群。 5. —種用於化學機械平整化清潔之清潔溶液,其主要係由 0.05 wt%-1.25 wt%之四級化氫氧化銨、0.2 wt%-2.25 wt%單乙 醇铵、0.1 wt%-l wt%五倍子酸、有效量之抗壞血酸及其餘 為水所構成。 6. —種介層窗清潔溶液,其主要係由1.8 wt%-12.4 wt%之四級 化氫氧化銨、2.0 wt%-27.8 wt%之單乙醇銨、0.1 wt%-4 wt%之 五倍子酸、0.2wt%-10.9wt%之抗壞血酸、及其餘為水所構 成。 7. —種用於微電子基材之清潔溶液,其主要係由以下所構 成: 1.5 wt%-12.5 wt%之濃縮液,該濃縮液包含1.8 wt%-12.4 wt%之四級化氫氧化铵,其中燒基之碳原子數為1-10之 一,或碳原子數1 _ 1 0之混合物,2.0 wt%-27.8 wt%之極性 有機胺,其係選自由單乙醇銨、胺乙基乙醇胺、N -甲基 胺乙醇、二乙醇胺、三乙醇胺、碳原子數2-5之醇胺、 O:\76\76627-920922.DOC、5 - 2 _ 本紙張尺度邊用中國國家標準(CNS) A4規格(210 X 297公釐) 1299885 A8 B8 C8 D8 六、申請專利範圍 以及上述之混合物所組成之群,0.1 wt%-4 wt%之五 倍子酸,1.0 wt%-10.9 wt%腐蚀抑制劑,其係選自由抗壞血 酸、L( + )抗壞血酸、異抗壞血酸、抗壞血酸衍生物、擰 檬酸、乙二胺四乙酸、苯并三唑、及上述之混合物所組 成之群’其餘為水; 87.5 wt%-98.5 wt%之去離子水,該清潔溶液之鹼濃度含 量係大於0.073百萬當量鹼/每克。 8. —種用於_潔淨含銅微電子基材之清潔溶液,該清潔溶液 係由1.5 wt%-12.5 wt%濃縮液,該濃縮液含有1.8 wt%-12.4 wt% 之四級化氫氧化銨、2 wt%-27.8 wt%之單乙醇銨、0.1 wt%-4.0 wt%之五倍子酸、1.0 wt%-10.9 w t %之抗壞血酸、其 餘為水,與87.5 wt%-98.5 wt%去離子水所構成,該清潔溶 液之鹼濃度含量係大於0.073百萬當量鹼/每克。 O:\76\76627-920922.DOC\ 5 - 3 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐)
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EP1845555B1 (en) | 2015-09-16 |
EP1845555A1 (en) | 2007-10-17 |
WO2002065538A2 (en) | 2002-08-22 |
ATE373873T1 (de) | 2007-10-15 |
US6723691B2 (en) | 2004-04-20 |
EP1360712B1 (en) | 2007-09-19 |
JP2004518819A (ja) | 2004-06-24 |
DE60222532D1 (de) | 2007-10-31 |
DE60222532T2 (de) | 2008-05-29 |
US20010004633A1 (en) | 2001-06-21 |
EP1845555B8 (en) | 2016-06-29 |
EP1360712A2 (en) | 2003-11-12 |
JP5097640B2 (ja) | 2012-12-12 |
EP1360712B9 (en) | 2008-10-29 |
WO2002065538A3 (en) | 2003-02-13 |
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