TW574369B - Post chemical-mechanical planarization (CMP) cleaning composition - Google Patents
Post chemical-mechanical planarization (CMP) cleaning composition Download PDFInfo
- Publication number
- TW574369B TW574369B TW90125393A TW90125393A TW574369B TW 574369 B TW574369 B TW 574369B TW 90125393 A TW90125393 A TW 90125393A TW 90125393 A TW90125393 A TW 90125393A TW 574369 B TW574369 B TW 574369B
- Authority
- TW
- Taiwan
- Prior art keywords
- weight
- solution
- cleaning
- ascorbic acid
- cleaning solution
- Prior art date
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 111
- 239000000203 mixture Substances 0.000 title claims description 45
- 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 83
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000758 substrate Substances 0.000 claims abstract description 38
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 claims abstract description 38
- 229960005070 ascorbic acid Drugs 0.000 claims abstract description 31
- 235000010323 ascorbic acid Nutrition 0.000 claims abstract description 29
- 239000011668 ascorbic acid Substances 0.000 claims abstract description 29
- 238000004377 microelectronic Methods 0.000 claims abstract description 20
- 238000005260 corrosion Methods 0.000 claims abstract description 15
- 230000007797 corrosion Effects 0.000 claims abstract description 15
- 239000000908 ammonium hydroxide Substances 0.000 claims abstract description 12
- 150000001412 amines Chemical class 0.000 claims abstract description 8
- 239000003112 inhibitor Substances 0.000 claims abstract description 7
- -1 monoethylanolamine Chemical compound 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 49
- 229910052802 copper Inorganic materials 0.000 claims description 49
- 239000010949 copper Substances 0.000 claims description 49
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 33
- 239000008367 deionised water Substances 0.000 claims description 19
- 229910021641 deionized water Inorganic materials 0.000 claims description 19
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 18
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 11
- 239000003513 alkali Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 239000002562 thickening agent Substances 0.000 claims description 10
- CIWBSHSKHKDKBQ-DUZGATOHSA-N D-araboascorbic acid Natural products OC[C@@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-DUZGATOHSA-N 0.000 claims description 9
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 7
- 239000004318 erythorbic acid Substances 0.000 claims description 7
- 235000010350 erythorbic acid Nutrition 0.000 claims description 7
- 229940026239 isoascorbic acid Drugs 0.000 claims description 7
- 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 description 6
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- LHIJANUOQQMGNT-UHFFFAOYSA-N aminoethylethanolamine Chemical compound NCCNCCO LHIJANUOQQMGNT-UHFFFAOYSA-N 0.000 claims description 6
- 239000012964 benzotriazole Substances 0.000 claims description 6
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 6
- JPIGSMKDJQPHJC-UHFFFAOYSA-N 1-(2-aminoethoxy)ethanol Chemical compound CC(O)OCCN JPIGSMKDJQPHJC-UHFFFAOYSA-N 0.000 claims description 5
- 239000002211 L-ascorbic acid Substances 0.000 claims description 5
- 235000000069 L-ascorbic acid Nutrition 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 5
- 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 4
- 150000000996 L-ascorbic acids Chemical class 0.000 claims description 4
- OPKOKAMJFNKNAS-UHFFFAOYSA-N N-methylethanolamine Chemical compound CNCCO OPKOKAMJFNKNAS-UHFFFAOYSA-N 0.000 claims description 4
- ZZZCUOFIHGPKAK-UHFFFAOYSA-N D-erythro-ascorbic acid Natural products OCC1OC(=O)C(O)=C1O ZZZCUOFIHGPKAK-UHFFFAOYSA-N 0.000 claims description 3
- 229930003268 Vitamin C Natural products 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 235000019154 vitamin C Nutrition 0.000 claims description 3
- 239000011718 vitamin C Substances 0.000 claims description 3
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 claims 1
- ZLNOCHGFOWZVRV-UHFFFAOYSA-N CC(NC1=CC=CC2=C1CC3=CC=CC=C32)O Chemical compound CC(NC1=CC=CC2=C1CC3=CC=CC=C32)O ZLNOCHGFOWZVRV-UHFFFAOYSA-N 0.000 claims 1
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims 1
- 150000004679 hydroxides Chemical class 0.000 claims 1
- LFETXMWECUPHJA-UHFFFAOYSA-N methanamine;hydrate Chemical compound O.NC LFETXMWECUPHJA-UHFFFAOYSA-N 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 125000001453 quaternary ammonium group Chemical group 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 112
- 235000012431 wafers Nutrition 0.000 description 28
- 238000004630 atomic force microscopy Methods 0.000 description 16
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 16
- 239000002184 metal Substances 0.000 description 12
- 238000004070 electrodeposition Methods 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000012141 concentrate Substances 0.000 description 10
- 238000012545 processing Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 239000002245 particle Substances 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 235000004515 gallic acid Nutrition 0.000 description 8
- 229940074391 gallic acid Drugs 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 238000005530 etching Methods 0.000 description 6
- 229920002120 photoresistant polymer Polymers 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical class [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000003082 abrasive agent Substances 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
- 238000004458 analytical method Methods 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 235000006708 antioxidants Nutrition 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000002242 deionisation method Methods 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 150000005622 tetraalkylammonium hydroxides Chemical class 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- JQMFQLVAJGZSQS-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-N-(2-oxo-3H-1,3-benzoxazol-6-yl)acetamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)NC1=CC2=C(NC(O2)=O)C=C1 JQMFQLVAJGZSQS-UHFFFAOYSA-N 0.000 description 1
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 description 1
- 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
- BDDLHHRCDSJVKV-UHFFFAOYSA-N 7028-40-2 Chemical compound CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O BDDLHHRCDSJVKV-UHFFFAOYSA-N 0.000 description 1
- CYSPWCARDHRYJX-UHFFFAOYSA-N 9h-fluoren-1-amine Chemical compound C12=CC=CC=C2CC2=C1C=CC=C2N CYSPWCARDHRYJX-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 241000244186 Ascaris Species 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-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
- 241000613130 Tima Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- GTYNIXHTXBGGHQ-UHFFFAOYSA-N acetic acid osmium Chemical compound [Os].CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O GTYNIXHTXBGGHQ-UHFFFAOYSA-N 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
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process 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
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000002195 synergetic effect Effects 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
- 239000012085 test solution Substances 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
- H01L21/0206—Cleaning during device manufacture during, before or after processing of insulating layers
- H01L21/02063—Cleaning during device manufacture during, before or after processing of insulating layers the processing being the formation of vias or contact holes
-
- 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
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
-
- 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
- C11D7/265—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
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Description
574369
發明範疇 概略而言本發明係關於後化學-機械研磨(後_CMp)清潔 操作範疇,特別係關於微電子基板之後_CMp清潔溶液。、 發明背景 今曰半導體裝置的製造是一項複雜的多步驟過程。化 學-機械平面化(CMP)處理今日已經明確建立讓最先進的半 V體操作應用於平面化各色基板用以製造具有設計幾何小 於〇·35微米之裝置。 CMP處理涉及於經過控制之化學、壓力及溫度條件下固 定且相對於經濕潤的研磨表面旋轉半導體材料之薄而平坦 的基板。使用含研磨劑如氧化銘或氧化石夕之化學料衆做為 磨姓材料。此外,化學料漿含有選用的化學品,該化學品 可於處理期間姓刻基板之各表面。於研磨過程中,組合材 料的機械與化學去除將導致表面優異地平面化。 但CMP處理於半導體基板表面上留下污染。此種污牵包 含來自研磨料漿的磨粒可能由氧化鋁或氧化矽組成以及帶 有添加至研磨料漿的反應性化學品。此外,污染層可能包 含研磨料漿與被研磨表面之反應產物。需於隨後處理半導 體基板前去除污染以防止裝置之可信度低劣以及避免導入 缺陷,造成製程良率的降低。如此,發展出後-CMP清潔 溶液來清潔基板表面的CMP殘餘物。 基於氫氧化銨之鹼性溶液傳統上用於後-CMP清潔用途 。今日大部份CMP應用係針對鋁、鎢、钽及含氧化物表面。 但,銅逐漸變成於半導體製造上製造互連結構的首選材 -4 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐) 574369 A7 ___B7 五、發明説明(2 ) 料。銅替代紹成為此種製造的首選金屬。習知後-CMp製 程不適合清潔含銅表面。於此種CMP處理後,銅、銅氧化 物及料裝粒子變成污染物存在於銅表面上。銅表面快速擴 散於石夕及二氧化矽。因此,需由全部晶圓表面去除以防止 裝置故障。 傳統上可有效用於基於氧化鋁及氧化矽之CMP處理之 後-CMP清潔溶液無法有效用於含銅表面。而銅容易因此 等清潔溶液而受損。此外,使用此種後_CMp清潔溶液清 潔效率已經證實無法為人所接受。
Nam之美國專利第5,863,344號揭示一種含有四甲基氫氧 化錄’乙酸及水之半導體裝置清潔溶液。溶液較佳含有乙 酸對四甲基氫氧化銨之容積比係於約1至約50之範圍。
Ward之美國專利第5,597,42〇號揭示一種水性去除組合 物’其可用於由基板清潔有機及無機化合物而不會腐蝕或 溶解基板的金屬電路。基板的水性組合物含有70至95重量% 單乙醇胺及約5重量%防蝕劑如兒茶酚、苯三酚或沒食子 酸。
Ward之美國專利第5,709,756號揭示一種清潔組合物含 有約25至48重量%羥胺,1至20重量%氟化銨,及水。溶液 pH大於8。溶液進一步含有防蝕劑如沒食子酸、兒茶酚或 苯三酴。
Hardi等人之美國專利第5,466,389號揭示清潔微電子基 板之水性鹼性清潔溶液。清潔溶液含有一種不含金屬離子 的鹼性組成分如第四氫氧化銨(至多25重量%),一種非離 -5- 本纸張尺度適用中國國家標準(CNS) A4規格(210X 297公釐)
裝 訂
574369
子性界面活性劑(至多5重量%),以及一種pH調整組成分 如乙酸俾控制pH於8至10之範圍。
Schwartzkopf等人之歐洲專利第〇647884A1號揭示含還 原劑俾減少金屬腐#之光阻劑去除劑。此專利案教示使用 抗壞血酸、沒食子酸、苯三酚等用以於含強鹼組成分控制 金屬的腐I虫。
Satoh等人之美國專利第5,143,648以引用方式併入此處 ’揭示新藉抗血酸組合物做為抗氧化劑。
Ward之美國專利第5,563,1 19號揭示一種由烷醇胺、四 烧基氫氧化銨及防姓劑組成用以由鋁化無機基板清潔有機 殘餘物之水性去除組合物。 需要有一種可用於含銅表面之後-CMP清潔組合物。此 種後-CMP清潔組合物需可由目標表面實質去除粒子以及 防止含銅基板的腐蝕。此種後-CMP清潔組合物也須避免 攻擊後-CMP處理使用的處理裝備。此種後-cmp清潔組合 物也需於寬廣溫度範圍經濟有效。此種後-CMp清潔組合 物也可用於利用基於氧化鋁或氧化矽之料漿進行CMP處理 後之清潔操作。 發明概要 本發明為一種清潔微電子基板之水性清潔溶液,包含一 種第四氫氧化銨,其係選自四烷基氫氧化銨組成的組群, 其中烷基含有(^至C1G原子之一或(^至C1G原子的組合;有 機fe ’其係選自單烧醇胺、胺基乙基乙醇胺、N-曱基胺某 乙醇、胺基乙氧乙醇、二乙醇胺、三乙醇胺、C2_c5烧醇 -6- 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐) 574369 A7 B7 胺類及其組合組成的組群;一種防姓劑,其係選自抗壞血 酸、L( + )-抗壞血酸、異抗壞血酸、抗壞血酸衍生物、檸 檬酸、伸乙基二胺四乙酸(EDTA)、笨并三唑及其組合組 成的組群。溶液之鹼度大於〇·073毫當量驗/克溶液。 如此於本發明之一特徵方面為一種清潔微電子基板之清 潔溶液’該清潔溶液包含:〇.〇5至12.4重量%第四氫氧化 銨’其係選自四烧基氫氧化錢組成的組群,其中該烧基含 有Ci至Ci〇原子之一或(^至匸⑼原子的組合;〇·2重量%至 27.8重量%極性有機胺,其係選自單乙醇胺、胺基乙基乙 醇胺、Ν-甲基胺基乙醇、胺基乙氧乙醇、二乙醇胺、三乙 醇胺、CrC5烧醇胺類及其組合組成的組群;有效量防蝕 劑,其係選自抗壞血酸(維生素C)、L(+)-抗壞血酸、異抗 壞血酸、抗壞血酸衍生物、苯并三唑、檸檬酸、伸乙基二 胺四乙酸(EDTA)及其組合組成的組群;差額為水;以及 此種溶液之鹼度大於0·073毫當量鹼/克溶液。 於一特徵方面本發明為一種清潔微電子基板之清潔溶液 包含a)四曱基風氧化按’ b)單乙醇胺,c)抗壞血酸及去離 子水。溶液之鹼度係大於0.073毫當量鹼/克溶液。較佳, 四曱基氫氧化銨於清潔溶液之含量係於約〇15重量0/。至約 1.25重里%之範圍’單乙醇胺於溶液之含量係於約ο]重量% 至約2 · 2 5重量%之範圍,及抗壞血酸於溶液之含量係於約 0.10重量%至約0.9重量%之範圍。 於又另一特徵方面,本發明為一種微電子基板之清潔溶 液,該清潔溶液主要係由1 · 5重量%至12 · 5重量%濃劑組成 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐)
裝 訂
574369
,該濃劑之組成為:3.〇至12.4重量%第四氫氧化録,其係 選自四烷基氫氧化銨組成的組群’其中該烷基含有A至 c10原子之一或c^ClQ原子的組合;5〇重量%至27 8重量% 極性有㈣’其係選自單乙醇胺、胺基乙基乙醇胺、N•甲 基胺基乙醇、胺基乙氧乙醇、二乙醇胺、三乙醇胺、c2-c5 烷醇胺類及其組合組成的組群;20重量%至1〇 9重量%防 蝕劑,其係選自抗壞血酸(維生素c)、[(+)_抗壞血酸、異 抗壞血酸、抗壞血酸衍生物、笨并三唑、檸檬酸、伸乙基 一胺四乙酸(EDTA)及其組合組成的組群;差額為水;以 及87.5重量%至98.5重量%去離子水;此種溶液之鹼度大於 0.073毫當量鹼/克溶液。 於本發明之又另一特徵方面為一種用於清潔微電子基板 之清潔溶液之濃劑組合物。濃劑組合物包含約3 〇重量%至 約12.4重量%四曱基氫氧化銨,約5重量%至約27·8重量% 單乙醇胺,約2.0重量%至約丨〇·4重量%抗壞血酸,差額為 去離子水。清潔溶液係經由混合至少約1.5重量%至接近 100重量%濃劑與去離子水製成。濃劑也可未經進一步混 合水而使用。 圖式之簡單說明 圖1為一片基板上部份經研磨之電化學沉積銅表面於10 微米χ10微米放大之原子力顯微術(AFM)掃描。 圖2為使用根據本發明之溶液處理圖1之晶圓於1〇微米 x 10微米放大之原子力顯微術(AFN1)掃描。 圖3為使用根據本發明之另一種組合物清潔圖1銅試樣於 -8 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公袭·)
裝 訂
574369 圖4為使用根據本發明之不同組合物處理之圖1銅試樣於
A7 B7 五、發明説明(6 10微米Χίο微米放大之原子力顯微術(AFM)掃描。 10微米Χίο微米放大之原子力顯微術(AFM)掃描。 圖5為於本發明組合物處理前通孔於丨〇微米χ丨〇微米放大 之原子力顯微術(AFM)掃描。 圖6為圖5通孔於使用本發明溶液處理後於1〇微米χ1〇微 求放大之原子力顯微術(AFM)掃描。 圖7為資料代表圖顯示於使用本發明組合物清潔前與後 晶圓上之粒子數目的測量值。— 圖8為於使用本發明溶液清潔前與後晶圓之粒子計數掃 描。 發明之詳細說明 提供一種於CMP處理後清潔含銅微電子基板之清潔溶液 。於CMP處理後清潔含銅基板通常稱作為“後cMp清潔,,。 含銅微電子基板”一詞需了解於此處表示一種基板表面製 造供微電子、積體電路、或電腦晶片等用途,其中該基板 含有含銅組件。含銅組件包括例如主要為銅或銅合金的金 屬互連結構。需了解微電子表面也可由半導體材料組成例 如TiN,Ta , TiW作為銅擴散阻擋成金屬及氧化矽。通常 含銅微電子基板含有約1 %至100%銅包括銅互連結構。 本發明之清潔溶液可用於微電子基板如半導體晶圓製造 期間之任何清潔操作。最值得注意者為此種清潔應用包括 後通孔形成及後-CMP處理。習知半導體晶圓的製造涉及 多個步驟,此等步驟要求平面化,接著去除來自平面化處 -9 - 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐)
574369 A7 B7 五、發明説明( 理的殘餘物質。 本發明之清潔溶液包含第四氫氧化銨,有機胺、防蝕劑 及差額為水。第四氫氧化銨,其係選自四烷基氫氧化銨 (TMAH)組成的組群,此處烷基含有CisciG原子之一或Cl SC1G原子的組合。第四氫氧化録於溶液之存在量為約 0.05重量%至約12.4重量%。 極性有機胺,其係選自單乙醇胺(MEA)、胺基乙基乙醇 胺、N-甲基胺基乙醇、胺基乙氧乙醇、二乙醇胺、三乙醇 月女、C^C5烧醇胺類及其組合組成的組群。極性有機胺於 溶液之存在量為約〇.2重量%至約27·8重量0/〇。 防蝕劑,其係選自抗壞血酸、!^( + )-抗壞血酸、異抗壞 血酸、抗壞血酸衍生物、檸檬酸、苯并三唑及其組合組成 的組群。防蝕劑於溶液之存在量為約〇2重量%至約ι〇·9重 量%。需要獲得最理想的腐餘量同時有效清潔表面,讓銅 氧化物及其它污染由表面被去除。因此,用於最理想清潔 ,該方法通常誘使晶圓表面之微量銅耗損,但維持二: 本散明滑漯溶液之驗度係 七田置峨-/兄浴液。 本电明之-具體實施例中,提供—種可稀釋用做 液之濃縮組合物。本發明之濃縮組合物或“濃劑,,可 允許使用者,例如CMP處理工程師將濃劑稀釋至 及驗度。奏物7辰劑具有較長的儲存壽命、办' 存。 罕又令易輪送與儲 抗壞血酸及其衍生物廣泛用於食品及藥品 ’、口口文為抗氧化劑 -10-
574369 A7 ___— _ B7 五、發明説明(8 ) 。發現也可成功地用做為金屬或金屬合金存在於水性或溶 劑環境的防蝕劑。本發明之抗壞血酸及其它組成分通 市面上可得。 、 本發明之清潔;容液之主要#色為非水性組成分(水以外 的組成分)以小量存在於溶液。此乃具有經濟優勢,原因 在於可更經濟地調配有效清潔溶液,此點相當重要原因在 於後-CMP溶液的用量大。 根據本發明之濃劑溶液較佳包含約3〇至124重量% TMAH,約5.〇至27.8重量% MEA,約2 ()至約1() 4重量%抗〇 壞血酸,差額為水(較佳為去離子水)。 此外,本發明之濃劑也含有螯合劑用以進一步防止非期 望的金屬污染物沉積於晶圓表面上。眾所周知的鋅、銅、 鎳、鐵等金屬錯合劑被引進調配劑。也已知防蝕劑之金屬 保護能力於許多例中係關連有機錯合物形成劑之錯合物形 成性質。 本發明之濃劑較佳經由添加去離子水至濃劑係占製備妥 的清潔溶液之約1.5重量%至約12.5重量%稀釋用於後_CMp 清潔用途。本發明之清潔溶液可用於周圍條件至约7〇χ:溫 度清潔微電子基板◊通常需了解清潔效果隨著溫度提高而 改善。 注意本發明之清潔溶液具有鹼度大於〇 〇73亳當量鹼/克 /谷液。更佳本發明之清潔溶液之鹼度係維持大於約〇 〇9 1 毫當量驗/克溶液。 本發明之清潔溶液符合一般可接受之後-CMp應用之產 -11 - 本紙張尺度適用中國國家標準(CNS) A4規格(21G X 297公爱) A7 B7
574369 五、發明説明(9 ) 業清潔效能標準。常見產業清潔目標為基板晶圓上粒子數 目對200毫米晶圓,5毫米邊緣排除不計而言尺寸大於〇 2 微米粒子少於20。 本發明之清潔溶液於調配劑無需界面活性劑,但如此不 排除其用於特定應用。 本發明之清潔溶液可用於多種習知清潔工具,包括維特 克(Verteq)單一晶圓巨音波金手指(G〇ldfinger)、恩崔特 (OnTrak)系統DDS(雙面條氣器)' SEZ單一晶圓噴霧清洗 以及巨音波(Megasonic)批次濕工作台系統。 本發明之清潔溶液可成功地用於含銅、鎢及/或氧化石夕 表面。 如所知,通孔的清潔屬於本發明清潔溶液之一項用途。 通孔為於微電子基板蝕刻而提供連接各層金屬管道的孔口 。使用氣態蝕刻技術蝕刻基板表面形成通孔。基板常見為 介電材料如氟化氧化矽玻璃(FSG)。留在基板表面及通孔 壁上的殘餘物於蝕刻處理後需被去除。殘餘物俗稱“側壁 聚合”,原因在於其也出現於通孔的垂直壁。蝕刻殘餘物 也位於通孔底部與金屬頂面。本發明清潔溶液不會與暴露 之介電材料反應或影響暴露之介電材料。 下列實例僅供舉例說明本發明而非意圖限制性。 實例1 進行試驗評估具有各種組成之後_CMP清潔溶液之相對 清春效能。清潔溶液係經由混合去離子水、丁Μαη、γ警 血酸以及三種胺化合物(ΜΕΑ,羥基胺或Ν-單乙醇胺)之一 -12 - 本纸張尺度適用中國國家標準(CNS) A4規‘(210X297公爱)
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574369 A7
▲備。製傷妥的清潔液組成列舉於表i。供比較目的,制 備另-種清潔溶液:溶液1〇為17重量%氫氧化銨於去離; 水及溶液11為1:2:10氫氧化銨:過氧化氫:水。
“浸泡”試驗係使用預先經過清潔之費雪(Fisher) 12_55〇_W 微鏡玻片進行。後述程序中,全部浸泡皆進行5秒且使用、 塑膠製鑷子處理。試樣玻片首先浸泡於CMP 一氧化物裝液 (歐特派(Uhraplane) IM500),然後浸泡於25〇毫升去離子 水,然後浸泡於W-CMP料漿(歐特派-mc w CMp鹼與去離 子水之1:1稀釋液)。然後各玻片浸泡於2 5 〇毫升去離子水 然k次泡於本清潔溶液。接著各玻片浸泡於丨〇〇毫升去 離子水,然後浸泡於另一個分開的去離子水浴槽。玻片於 周圍條件下懸吊風乾。於各次試驗間,更換全部去離子水 浴。 乾玻片以目測評估是否有剩餘CMP料漿,如由玻片上觀 察濁度證實。乾燥後之玻片比較且排序由最佳(1)至最差 (11)。 結果顯示於表1。 _ -13- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 574369 A7
、結果指出本發明之較佳具體實施例表現最優異(亦即溶 液1及2)。全部本發明溶液之表現皆優於先前技藝清潔溶 液(溶液10及11)。 實例2 評估清潔溶液(A至G)之腐蝕銅傾向。溶液A係由〇.9重量% MEA,0.5重量% TMAH及〇.3 5重量% (L)-抗壞血酸,差額 為去離子水組成。溶液B係由〇 9重量% MEA,0.5重量〇/〇 TMAH及0.18重量% (L)·抗壞血酸及差額為去離子水組成 。溶液C係由〇.9重量% MEA於水組成。溶液D係由〇·9重量〇/0 ΜΕΑ,0.5重量% ΤΜΑΗ及0.3 5重量%沒食子酸及差額為水 組成。溶液Ε係由0.9重量% ΜΕΑ,〇·5重量% ΤΜΑΗ及0.1 8 重量%沒食子酸及0.18重量%苯并三唑及差額為水組成。 溶液F為經緩衝之氫氟酸溶液,以及溶液G為1.7重量%氫 -14- 本紙張尺度適用中國國家標準(CNS) Α4規格(21〇χ 297公爱) 574369 A7 B7 五、發明説明(12 ) 氧化錢於水溶液。具有一致長及寬之銅條係得自一整片妙 過電化學沉積(ECD)銅晶圓(經部份研磨),然後置於周圍 條件下以攪拌入200毫升試樣清潔液經歷2分鐘時間。隨後 由清潔液中取出銅晶圓長條,以去離子清洗並以氣氣乾、燥 。銅晶圓長條目測撿查色彩的變化及光澤的損失。二種現 象皆證實為腐蝕。經處理的銅晶圓長條接受原子力顯微術 (AFM)檢查表面腐蝕。 腐蝕結果列舉於表II。 組成 基板 表II 腐姓試驗貧♦ · 試驗方法
銅(ECD,經部份研磨)AFM 結果 RMS-0.8 磨彳歩成凹坑 溶液A銅(ECD,經部份研磨)AFM RMS-1.0 極少形成凹坑,
溶液G銅(ECD,經部份研磨) rms=na 表面藉BTA修改 RMS=1.3 ^形成凹坑,略為铜诗 , t ( RMS=3.8 "~^ Irms』透過原子力"^^标測得成凹坑,中等 表II資料指示本發明之較佳 铋俘嘈呌里工 體實施例(溶液A)就銅腐 蝕保匕效果而言性能極佳。溶液 冰洚。糾士朴 與B之差異在於防蝕劑 /辰度所有其匕溶液比較較佳且許每 /、體貫施例皆造成顯著量銅 -15- 574369 A7 B7 五、發明説明(13 ) 表面腐姓。溶液G僅能去除表面之銅氧化物層故產生些微 粗化。 AFM掃描帶有RMS粗度資料實例顯示於圖1-4,其中圖1 為未經處理之電化學沉積(ECD)銅晶圓,圖2為暴露於溶液 A的相同ECD銅晶圓,圖3為暴露於溶液B之ECD銅晶圓及 圖4為暴露於下述溶液之ECD銅晶圓,該溶液係由0.9重量% MEA,0.5重量% TMAH,0.18重量%沒食子酸,差額為水 組成。 實例3 準備一系列清潔溶液來評估TMAH,MEA及抗壞血酸於 水性清潔溶液間之關係。清潔溶液係經由使用TMAH、 MEA及抗壞血酸及去離子水之多種組合製備,獲得TMAH 濃度為0.0重量%至0.5重量% ; MEA濃度為0重量%至0.9重 量% ;抗壞血酸濃度為0重量%至0.35重量% :溶液之差額 為去離子水。試驗溶液如表III列舉製備。製備妥之清潔溶 液根據實例1陳述之玻片浸泡試驗程序評估清潔效能。製 備妥的清潔液也根據實例2銅長條試驗程序評估銅腐餘傾 向。 結果顯示於表III。 -16- 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐)
裝 訂
k 574369 A7 B7 五、發明説明(14 ) 表 III — 組成 A B C D E F G TMAH (重 1%) 0.5 X X 0.5 0.5 X 0.5 ]^八(重量%) 0 0.9 X 0.9 X 0.9 0.9 抗壞血酸(重量%) X X 0.35 X 0.35 0.35 0.35 水(重1%) 99.50 99.10 99.65 98.60 99.15 98.75 98.25 組合物驗度 毫當量/克溶液 0.055 0.147 -0.020 0.202 0.035 0.127 0.182 浸泡試驗評比* 3 5 5 3 5 5 1 結果指出為浸泡試驗做為清意劑最佳的溶液(組成⑺含 有TMAH,MEA及抗壞血酸。不含有至少一種此等組成分 的溶液無法發揮同等良好的效果。結果提示當tmah, MEA及抗壞血酸並存於清潔溶液時,特別以較佳量並存時 獲得協同增效的清潔效果。 實例4 圖5顯示於原先晶圓表面上丨微米大小通孔之ΑρΜ截面分 析。通孔深度約400毫米。通孔之橫截面撿查明白指出蝕 刻後留下大量聚合物殘餘物。 製備本發明清潔溶液具有組成為1〇 〇重量% , 18.0重量% MEA,7.〇重量%抗壞血酸,差額為水。通孔經 過部份蝕刻之晶圓浸泡於70t:之此種溶液内3〇分鐘。然後 使用去離子水清洗約丨分鐘,接著以氮氣吹乾。 圖6顯示使用前述溶液處理後同型丨微米尺寸通孔之 剖面分析。通孔之截面圖顯示其深度側繪圖及淺(平均8〇 毫微米)。處理前與後通孔深度側繪圖之對比係由於由 圓表面去除光阻劑層,光阻劑層估計厚度约3〇〇亳微米 ___-17- 本紙張尺度適财® ®家標準(CNS) A4規格(2削297公爱) 574369 A7 ______B7 五、發明説明(15 ) 通孔底部之矩形側繪圖(圖6)也指出側壁聚合物係藉前述 溶液去除。此等結果提示較佳具體實施例為用於通孔清潔 及光阻劑去除的有用組成。 實例5 二種溶液用於後CMP清潔應用試驗。溶液I (0.45重量% MEA,0.25重量% TMAH及0.175重量%沒食子酸及差額為 水)以及溶液II (〇.45重量% MEA,0.25重量% TMAH及 〇· 1 75重量%抗壞血酸及差額為水)用於使用卡布拉(c〇bra)_ VcS站於TEOS晶圓於浸泡於歐林亞取(〇ϋη Arch) 10K料漿 溶液前與後進行清潔試驗。圖7 —8顯示使用KLA-天宼 (Tencor)以及由使用溶液][及溶液]^清潔的晶圓測得的粒子 數目。顯然根據本發明之較佳組合物,溶液n證實具有優 異清潔能力。 實例6 製備及評比濃劑溶液,濃劑溶液分別稀釋至1.25 , 1.33 ,2.5及5重量%。部份平面化之ECD銅晶圓小片於二種不 同怪溫條件(22t至5GX:)浸沒於其中簡拌後之溶液歷經 3一0分鐘時間。於處理前及後對各晶圓小片進行四點探針測 量片電值。算出溶液之銅蝕刻速率。濃劑八為1〇〇重量% TMAH’ 18重量% MEA,7.〇重量%抗氧化酸及差額為水。 濃劑B為1〇.〇重量% TMAH,18重量% MEa,7 〇重量%沒 食子酸及差額為水。結果以埃/分鐘報告於表Iv。 -18- 本紙張尺度適用中國國家標準(CNS) A4規格(21〇χ 297公釐) 574369 A7 B7 五、發明説明(16 ) 表IV 濃劑組成A 濃劑組成B 濃劑 蝕刻速率 钱刻速率 Ί虫刻速率 钱刻速率 重量% 於 22°C 於 50〇C 於 22°C 於 50〇C 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 由表IV資料顯然易知濃劑組成A具有優於濃劑組成B之 防姓性質。 實例7 二種濃劑溶液係以實例6之方式製備且分別稀釋至12.5 及50重量%。部份經平面化的ECD銅晶圓小片於恆溫(22°C ) 浸沒於此種經攪拌之溶液歷經10分鐘時間。於處理前及後 對小片進行片電阻及四點探針測量。片電阻變化係以毫歐 姆/平方厘米報告於表V。 表V 1 片電阻變化 濃劑重量% 濃劑組成A I 濃劑組成B 12.5 -0.0015 0.1742 50 -0.0994 1 0.3307 顯然濃劑組成A具有優於濃劑組成B之優異防蝕性質。 濃劑組成A也明白驗證出乎意外的結果為片電阻降低。 如此說明本發明,但絕非囿限於此處顯示及說明之特定 具體實施例,本發明係由隨附之申請專利範圍陳述已知範 圍所界定。 -19- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐)
Claims (1)
- 574369 — :r' 六、申請專利 ABCD 1 ·.一種用以清潔微電子基板之清潔溶液,該清潔溶液包含: 〇·〇5至12.4重量%第四氫氧化銨,其係選自四烷基氫 氧化錢組成的組群,其中該烷基含有(^至ciq個原子之 一或(^至(:1()個原子的組合; 〇·2重量%至27.8重量%極性有機胺,其係選自單乙醇 胺、胺基乙基乙醇胺、N-曱基胺基乙醇、胺基乙氧乙 醇、二乙醇胺、三乙醇胺、C2-C5烷醇胺類及其組合組 成的組群; 有效量防蝕劑,其係選自抗壞血酸(維生素C)、L( + )-抗壞血·酸、異抗壞血酸、抗壞血酸衍生物、苯并三唑、 棒檬酸、伸乙基二胺四乙酸(EDtA)及其組合組成的組 群’差額為水;以及 此種溶液之鹼度大於〇.073毫當量鹼/克溶液。 2· —種用以清潔含銅微電子基板之清潔溶液,該清潔溶液 包含: 〇·5至12.4重量%四甲基氫氧化銨; 〇·2至27.8重量%單乙醇胺; 0.2至1〇·9重量%抗壞血酸 差額為去離子水;以及 其中該溶液鹼度係大於〇·〇73毫當量鹼/克溶液。 3.如申請專利範圍第2項之清潔溶液,其中該溶液鹼度係 大於〇·1毫當量鹼/克溶液。 4·如申請專利範圍第i項之清潔溶液,其中該防蝕劑係, 其係選自抗壞血酸、L-抗壞血酸、異抗壞金酸及抗壞血 -20- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 574369A BCD 酸衍生物組成的組群。 5· 一種CMP清潔用清潔溶液,其主要係由〇〇5重量%至 • 25重里/❶四曱基氫氧化敍,〇·2重量%至2·25重量%單 乙醇胺及有效.量抗壞血酸,差額為水組成。 6 ·種通孔清潔用清潔溶液,其主要係由7 · 5重量至丨2 4 重! %四曱基氫氧化銨,12 5重量%至27 8重量%單乙醇 胺,〇·2重量%至1〇.9重量%抗壞血酸,差額為水組成。 7. —種用以微電子基板之清潔溶液,該清潔溶液主要係由 以下所組成; — 1.5重量%至12.5重量%濃劑,該濃劑之組成為3〇至 12.4重里%第四氫氧化錢,其係選自四烧基氫氧化敍組 成的組群,其中該烷基含有(^至c1G原子之一或(^至Ci〇 原子的組合,5.0重量%至27.8重量%極性有機胺,其係 選自單乙醇胺、胺基乙基乙醇胺、N—甲基胺基乙醇、 胺基乙氧乙醇、二乙醇胺、三乙醇胺、C2-C5烷醇胺類 及其組合組成的組群;2.0重量%至10.9重量%防蝕劑, 其係選自抗壞血酸(維生素C)、L( + )-抗壞血酸、異抗壞 血酸、抗壞血酸衍生物、苯并三η坐、檸檬酸、伸乙基二 胺四乙酸(EDTA)及其組合組成的組群,差額為水;以及 87.5重量%至98.5重量%去離子水,此種溶液之鹼度 大於0.073毫當量鹼/克溶液。 8. —種用於含銅微電子基板之清潔溶液,該清潔溶液組成 為; 1.5重量%至12.5重量%濃劑其係由5.0至12·4重量%四 -21 - 本纸張尺度適用中國國家標準(CNS) Α4規格(210 X 297公釐) '" 574369 8 8 8 8 A B c D 々、申請專利範圍 .甲基氫氧化銨,2.0至27.8重量%單乙醇胺,2.0至10.9重 量%抗壞血酸,差額為水;以及87.5重量%至98.5重量% 去離子組成,該溶液具有鹼度大於0.073毫當量鹼/克溶 液0 -22- 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐)
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2000
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- 2001-06-06 KR KR1020077026381A patent/KR100831182B1/ko active IP Right Grant
- 2001-06-06 KR KR1020027016692A patent/KR100831180B1/ko active IP Right Grant
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- 2001-06-06 EP EP01942043A patent/EP1287550B1/en not_active Expired - Lifetime
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TWI418622B (zh) * | 2005-05-26 | 2013-12-11 | Advanced Tech Materials | 銅鈍化之後段化學機械拋光清洗組成物及利用該組成物之方法 |
TWI507521B (zh) * | 2005-05-26 | 2015-11-11 | Entegris Inc | 銅鈍化之後段化學機械拋光清洗組成物及利用該組成物之方法 |
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KR20030025238A (ko) | 2003-03-28 |
JP2003536258A (ja) | 2003-12-02 |
WO2001095381A2 (en) | 2001-12-13 |
EP1287550A2 (en) | 2003-03-05 |
US6492308B1 (en) | 2002-12-10 |
EP1287550B1 (en) | 2010-03-24 |
ATE462198T1 (de) | 2010-04-15 |
KR20070114326A (ko) | 2007-11-30 |
CN1433567A (zh) | 2003-07-30 |
DE60141629D1 (de) | 2010-05-06 |
WO2001095381A3 (en) | 2002-05-23 |
JP4942275B2 (ja) | 2012-05-30 |
KR100831182B1 (ko) | 2008-05-22 |
CN1205655C (zh) | 2005-06-08 |
KR100831180B1 (ko) | 2008-05-21 |
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