TW201313965A - 銅電鍍方法 - Google Patents
銅電鍍方法 Download PDFInfo
- Publication number
- TW201313965A TW201313965A TW101121412A TW101121412A TW201313965A TW 201313965 A TW201313965 A TW 201313965A TW 101121412 A TW101121412 A TW 101121412A TW 101121412 A TW101121412 A TW 101121412A TW 201313965 A TW201313965 A TW 201313965A
- Authority
- TW
- Taiwan
- Prior art keywords
- copper
- group
- acid
- copper plating
- additive
- Prior art date
Links
- 239000010949 copper Substances 0.000 title claims abstract description 104
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 103
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 238000007747 plating Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000654 additive Substances 0.000 claims abstract description 74
- 230000000996 additive effect Effects 0.000 claims abstract description 65
- 239000000758 substrate Substances 0.000 claims abstract description 43
- 125000000623 heterocyclic group Chemical group 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims description 43
- 238000009713 electroplating Methods 0.000 claims description 34
- 239000011260 aqueous acid Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 17
- 229910052739 hydrogen Inorganic materials 0.000 claims description 15
- 239000001257 hydrogen Substances 0.000 claims description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 9
- 150000002431 hydrogen Chemical class 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 4
- 229910001431 copper ion Inorganic materials 0.000 claims description 4
- RILZRCJGXSFXNE-UHFFFAOYSA-N 2-[4-(trifluoromethoxy)phenyl]ethanol Chemical compound OCCC1=CC=C(OC(F)(F)F)C=C1 RILZRCJGXSFXNE-UHFFFAOYSA-N 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 229940098779 methanesulfonic acid Drugs 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 150000003536 tetrazoles Chemical class 0.000 claims description 3
- 150000003852 triazoles Chemical class 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 125000003277 amino group Chemical group 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 abstract 1
- 125000003396 thiol group Chemical group [H]S* 0.000 abstract 1
- -1 nitrogen-containing organic compounds Chemical class 0.000 description 13
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 9
- 238000000151 deposition Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000008021 deposition Effects 0.000 description 7
- 150000002148 esters Chemical class 0.000 description 7
- 239000003112 inhibitor Substances 0.000 description 7
- 238000000879 optical micrograph Methods 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 7
- 239000002202 Polyethylene glycol Substances 0.000 description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 6
- 229920001223 polyethylene glycol Polymers 0.000 description 6
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 229910052707 ruthenium Inorganic materials 0.000 description 5
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 4
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 4
- 238000001465 metallisation Methods 0.000 description 4
- 229920000151 polyglycol Polymers 0.000 description 4
- 239000010695 polyglycol Substances 0.000 description 4
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 4
- 229920002873 Polyethylenimine Polymers 0.000 description 3
- 229910000365 copper sulfate Inorganic materials 0.000 description 3
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 3
- 229920001521 polyalkylene glycol ether Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 150000003568 thioethers Chemical class 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- ODDAWJGQWOGBCX-UHFFFAOYSA-N 1-[2-(dimethylazaniumyl)ethyl]tetrazole-5-thiolate Chemical compound CN(C)CCN1N=NN=C1S ODDAWJGQWOGBCX-UHFFFAOYSA-N 0.000 description 2
- KJCVRFUGPWSIIH-UHFFFAOYSA-N 1-naphthol Chemical compound C1=CC=C2C(O)=CC=CC2=C1 KJCVRFUGPWSIIH-UHFFFAOYSA-N 0.000 description 2
- KJUGUADJHNHALS-UHFFFAOYSA-N 1H-tetrazole Substances C=1N=NNN=1 KJUGUADJHNHALS-UHFFFAOYSA-N 0.000 description 2
- MUHFRORXWCGZGE-KTKRTIGZSA-N 2-hydroxyethyl (z)-octadec-9-enoate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCCO MUHFRORXWCGZGE-KTKRTIGZSA-N 0.000 description 2
- OBDVFOBWBHMJDG-UHFFFAOYSA-N 3-mercapto-1-propanesulfonic acid Chemical compound OS(=O)(=O)CCCS OBDVFOBWBHMJDG-UHFFFAOYSA-N 0.000 description 2
- LUENVHHLGFLMFJ-UHFFFAOYSA-N 4-[(4-sulfophenyl)disulfanyl]benzenesulfonic acid Chemical compound C1=CC(S(=O)(=O)O)=CC=C1SSC1=CC=C(S(O)(=O)=O)C=C1 LUENVHHLGFLMFJ-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- XXACTDWGHQXLGW-UHFFFAOYSA-M Janus Green B chloride Chemical compound [Cl-].C12=CC(N(CC)CC)=CC=C2N=C2C=CC(\N=N\C=3C=CC(=CC=3)N(C)C)=CC2=[N+]1C1=CC=CC=C1 XXACTDWGHQXLGW-UHFFFAOYSA-M 0.000 description 2
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 2
- 229920000464 Poly(propylene glycol)-block-poly(ethylene glycol)-block-poly(propylene glycol) Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- WLKAMFOFXYCYDK-UHFFFAOYSA-N [5-amino-4-[[3-[(2-amino-4-azaniumyl-5-methylphenyl)diazenyl]-4-methylphenyl]diazenyl]-2-methylphenyl]azanium;dichloride Chemical compound [Cl-].[Cl-].CC1=CC=C(N=NC=2C(=CC([NH3+])=C(C)C=2)N)C=C1N=NC1=CC(C)=C([NH3+])C=C1N WLKAMFOFXYCYDK-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- XUJNEKJLAYXESH-UHFFFAOYSA-N cysteine Natural products SCC(N)C(O)=O XUJNEKJLAYXESH-UHFFFAOYSA-N 0.000 description 2
- 235000018417 cysteine Nutrition 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- HRMOLDWRTCFZRP-UHFFFAOYSA-L disodium 5-acetamido-3-[(4-acetamidophenyl)diazenyl]-4-hydroxynaphthalene-2,7-disulfonate Chemical compound [Na+].OC1=C(C(=CC2=CC(=CC(=C12)NC(C)=O)S(=O)(=O)[O-])S(=O)(=O)[O-])N=NC1=CC=C(C=C1)NC(C)=O.[Na+] HRMOLDWRTCFZRP-UHFFFAOYSA-L 0.000 description 2
- 150000002019 disulfides Chemical class 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 125000000219 ethylidene group Chemical group [H]C(=[*])C([H])([H])[H] 0.000 description 2
- 229940095098 glycol oleate Drugs 0.000 description 2
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 2
- 239000004312 hexamethylene tetramine Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 2
- 150000002988 phenazines Chemical class 0.000 description 2
- 229920001515 polyalkylene glycol Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001451 polypropylene glycol Polymers 0.000 description 2
- 239000005077 polysulfide Chemical class 0.000 description 2
- 229920001021 polysulfide Chemical class 0.000 description 2
- 150000008117 polysulfides Chemical class 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 229920005604 random copolymer Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 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 2
- 239000011550 stock solution Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 150000003573 thiols Chemical class 0.000 description 2
- 125000004035 thiopropyl group Chemical group [H]SC([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- VEPOHXYIFQMVHW-XOZOLZJESA-N 2,3-dihydroxybutanedioic acid (2S,3S)-3,4-dimethyl-2-phenylmorpholine Chemical compound OC(C(O)C(O)=O)C(O)=O.C[C@H]1[C@@H](OCCN1C)c1ccccc1 VEPOHXYIFQMVHW-XOZOLZJESA-N 0.000 description 1
- RFVNOJDQRGSOEL-UHFFFAOYSA-N 2-hydroxyethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCO RFVNOJDQRGSOEL-UHFFFAOYSA-N 0.000 description 1
- WZUUZPAYWFIBDF-UHFFFAOYSA-N 5-amino-1,2-dihydro-1,2,4-triazole-3-thione Chemical compound NC1=NNC(S)=N1 WZUUZPAYWFIBDF-UHFFFAOYSA-N 0.000 description 1
- BXDMTLVCACMNJO-UHFFFAOYSA-N 5-amino-1,3-dihydrobenzimidazole-2-thione Chemical compound NC1=CC=C2NC(S)=NC2=C1 BXDMTLVCACMNJO-UHFFFAOYSA-N 0.000 description 1
- JRLMMJNORORYPO-UHFFFAOYSA-N 5-phenyl-1,2-dihydro-1,2,4-triazole-3-thione Chemical compound N1C(S)=NC(C=2C=CC=CC=2)=N1 JRLMMJNORORYPO-UHFFFAOYSA-N 0.000 description 1
- FRFHUGVVCVMYFZ-UHFFFAOYSA-N CN(C)CCn1nncc1S Chemical compound CN(C)CCn1nncc1S FRFHUGVVCVMYFZ-UHFFFAOYSA-N 0.000 description 1
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 description 1
- 229920000463 Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) Polymers 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000000987 azo dye Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- BSXVKCJAIJZTAV-UHFFFAOYSA-L copper;methanesulfonate Chemical compound [Cu+2].CS([O-])(=O)=O.CS([O-])(=O)=O BSXVKCJAIJZTAV-UHFFFAOYSA-L 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- WIYCQLLGDNXIBA-UHFFFAOYSA-L disodium;3-(3-sulfonatopropyldisulfanyl)propane-1-sulfonate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)CCCSSCCCS([O-])(=O)=O WIYCQLLGDNXIBA-UHFFFAOYSA-L 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229940100242 glycol stearate Drugs 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 150000002466 imines Chemical class 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052757 nitrogen Chemical group 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 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
- OEIJHBUUFURJLI-UHFFFAOYSA-N octane-1,8-diol Chemical compound OCCCCCCCCO OEIJHBUUFURJLI-UHFFFAOYSA-N 0.000 description 1
- 238000000399 optical microscopy Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 125000001424 substituent group 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
- 235000012431 wafers Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/38—Electroplating: Baths therefor from solutions of copper
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/12—Semiconductors
- C25D7/123—Semiconductors first coated with a seed layer or a conductive layer
-
- 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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/288—Deposition of conductive or insulating materials for electrodes conducting electric current from a liquid, e.g. electrolytic deposition
- H01L21/2885—Deposition of conductive or insulating materials for electrodes conducting electric current from a liquid, e.g. electrolytic deposition using an external electrical current, i.e. electro-deposition
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76898—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics formed through a semiconductor substrate
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/42—Plated through-holes or plated via connections
- H05K3/423—Plated through-holes or plated via connections characterised by electroplating method
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/07—Treatments involving liquids, e.g. plating, rinsing
- H05K2203/0703—Plating
- H05K2203/0733—Method for plating stud vias, i.e. massive vias formed by plating the bottom of a hole without plating on the walls
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/18—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material
- H05K3/181—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating
- H05K3/187—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating means therefor, e.g. baths, apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Electroplating Methods And Accessories (AREA)
- Electrodes Of Semiconductors (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Abstract
本發明揭示一種於電鍍浴中之銅電鍍方法,其中使基板與整平劑添加劑接觸,該整平劑添加劑包含具有硫醇基之雜環核心及藉由間隔基鍵接至該雜環核心之胺基。該方法係尤其適用於在印刷電路板、IC基板及半導體基板之製造中填充凹形結構。
Description
本發明係關於將銅電鍍至基板上之領域。特定言之,關於水性酸性銅電鍍浴組合物、用於銅電鍍之預處理組合物及其應用。
用於銅電鍍之預處理組合物及用於銅電解沈積之水性酸性電鍍浴係用於製造印刷電路板及IC基板,其中需要利用銅來填充或建立微結構(如溝槽、通孔(TH)、微盲孔(BMV)及柱狀凸塊)。該銅電解沈積之另一應用係填充凹形結構(例如,矽穿孔(TSV))或於半導體基板內及其上形成再分佈層(RDL)及柱狀凸塊。
預處理組合物及/或酸性銅電鍍浴中存在的有機整平劑添加劑係吸附至基板表面上並影響其上之銅沈積。
專利申請案EP 1 249 861 A2揭示一種用於將銅沈積至半導體基板上之預處理組合物。該預處理組合物包含有機硫化物或二硫化物添加劑且視需要包含整平劑添加劑(例如,吩嗪偶氮染料)。
專利申請案JP 2001-152387 A揭示一種銅電鍍方法,其中該基板(i)係浸漬於含有添加劑之預處理組合物中,該添加劑係選自氯離子、界面活性劑及含氮有機化合物之群,(ii)經清洗及(iii)自不含界面活性劑之電鍍浴經銅沈積。
專利文獻US 2,758,076揭示一種包含5-胺基-2-巰基-苯并咪唑之酸性銅電鍍浴。源自該電鍍浴之銅沈積物係十分光
亮、紋理細密、柔軟及良好整平。
專利申請案EP 1 069 211 A2揭示一種酸性銅電鍍浴,其包含選自含氮五員及含氮六員雜環分子(例如5-苯基-1H-1,2,4-三唑-3-硫醇及4-胺基-5-(4'-吡啶基)-4H-1,2,4-三唑-3-硫醇)之低分子整平劑添加劑。
然而,預處理組合物及/或酸性銅電鍍浴中之該等整平劑添加劑係不適於滿足在高級印刷電路板、IC基板製造及半導體基板金屬化中之當前及未來需求。需要用銅來完全及不僅敷形地填充印刷電路板及IC基板中之BMV。BMV填充之典型要求係(例如):獲得完全填充型BMV,同時使沈積至相鄰平面基板區域上的銅不超過10至15 μm,且同時在填充型BMV之外表面上產生不超過0至5 μm的凹坑。
在半導體晶圓之金屬化中,TSV填充必須形成完全無空隙的銅填充,同時於相鄰平面區域上產生不超過通孔直徑之1/5之外鍍銅。
在使用酸性銅電鍍浴期間,整平劑添加劑趨於形成分解產物,其降低該等電鍍浴之壽命。
此外,在銅沈積期間,整平劑添加劑或其分解產物包含至銅沈積物中對機械性質(例如,沈積銅之延展性)具有不利影響。
在預處理組合物中使用整平劑添加劑仍無法解決該等問題。尤其係預處理組合物中使用的該等整平劑添加劑之整平性及TSV填充性不足以滿足製造印刷電路板、IC基板及半導體金屬化之當前技術水準中之要求。
因此,本發明之目標係提供一種預處理組合物及/或用於銅電解沈積之水性酸性銅電鍍浴,其滿足印刷電路板及IC基板製造及半導體基板金屬化領域中之上述應用(如,TSV填充、再分佈層或柱狀凸塊沈積)之要求。
此目標係藉由一種於電鍍浴中之銅電鍍方法來解決,其中使基板在銅電鍍之前及/或期間與整平劑添加劑接觸且其中該整平劑添加劑係選自式(I)分子:
Y係選自由-(NR4)-、-(CH2)-、-O-及-S-組成之群且n係0至6。
R1及R2係獨立地選自氫及C1至C4烷基(直鏈及分支鏈)。較佳地,R1及R2係選自由氫、甲基及乙基組成之群。最佳地,R1及R2係相同且選自由氫、甲基及乙基組成之群。
R3係選自氫、C1至C4烷基(直鏈及分支鏈)、鋰、鈉、鉀及銨。
雜環基團A係選自未經取代之三唑及未經取代之四唑。
R4係選自由氫及C1至C4烷基(直鏈及分支鏈)組成之群。
水性預處理組合物及/或酸性銅電鍍浴中存在的式(I)有機整平劑添加劑係吸附至基板表面上且影響其上之銅沈積。
本發明之整平劑添加劑係選自式(I)分子:
Y係選自由-(NR4)-、-(CH2)-、-O-及-S-組成之群,n係0至6且A係未經取代之雜環基團。
如果Y係選自-(NR4)-、-O-及-S-,則n較佳係1至6。
R1及R2係獨立地選自氫及C1至C4烷基(直鏈及分支鏈)。
較佳地,R1及R2係選自由氫、甲基及乙基組成之群。最佳地,R1及R2係相同且選自由氫、甲基及乙基組成之群。
R3係選自氫、C1至C4烷基(直鏈及分支鏈)、鋰、鈉、鉀及銨。
R4係選自由氫及C1至C4烷基(直鏈及分支鏈)組成之群。
該雜環基團A係選自未經取代之三唑及未經取代之四唑。
術語「未經取代」在文中係定義為除氫、一個基團及一個-SR3基團之外,不再有其他取代基鍵接至該雜環基團A。
該-SR3及基團可獨立地鍵接至雜環基團A之碳或氮原子。
更佳地,該-SR3基團係鍵接至雜環基團A之碳原子。
在本發明之一實施例中,如果Y係選自-(NR4)-、-O-及-S-,則n係1至6。
在本發明之一較佳實施例中,Y係選自由-(CH2)-及-(NR4)-組成之群,n係1至3且R4係選自氫、甲基及乙基。
在本發明之一實施例中,使該基板與包含式(I)整平劑添加劑之水性預處理組合物接觸。
該水性預處理組合物中之至少一種式(I)整平劑添加劑之濃度係0.001 mg/l至100 mg/l,更佳0.005 mg/l至約10 mg/l及最佳0.01 mg/l至1 mg/l。
該水性預處理組合物另外包含至少一種酸。
該水性預處理組合物具有2(更佳1)之pH值。
該至少一種酸源係選自包含硫酸、氟硼酸、磷酸及甲磺酸之群且以20 g/l至400 g/l(更佳50 g/l至300 g/l)之濃度添加。
該水性預處理組合物較佳另外含有至少一種促進劑-光亮劑添加劑。該至少一種促進劑-光亮劑添加劑係選自包含有機硫醇、硫化物、二硫化物及多硫化物化合物之群。較佳的促進劑-光亮劑添加劑係選自包含以下物質之群:3-(苯并噻唑基-2-硫)-丙基磺酸、3-巰基丙-1-磺酸、伸乙基二硫二丙基磺酸、雙-(對磺苯基)-二硫醚、雙-(ω-磺丁基)-二硫醚、雙-(ω-磺基羥丙基)-二硫醚、雙-(ω-磺丙基)-二硫醚、雙-(ω-磺丙基)-硫醚、甲基-(ω-磺丙基)-二硫醚、甲基-(ω-磺丙基)-三硫醚、O-乙基-二硫碳酸-S-(ω-磺丙基)酯、硫乙醇酸、硫磷酸-O-乙基-雙-(ω-磺丙基)酯、硫磷酸-參-(ω-磺丙基)酯及其對應鹽。該水性預處理組合物中存在的所有促進劑-光亮劑添加劑之濃度係0.01 mg/l至100
mg/l,更佳0.05 mg/l至10 mg/l。
視需要地,除該至少一種式(I)整平劑添加劑之外,該水性預處理組合物含有至少一種選自包含以下物質之群之其他整平劑添加劑:含氮有機化合物(例如聚乙亞胺、烷氧基化聚乙亞胺、烷氧基化己內醯胺及其聚合物、二伸乙基三胺及六亞甲基四胺);有機染料(例如Janus Green B、Bismarck Brown Y及酸性紫7);含硫胺基酸(例如半胱胺酸);吩嗪鎓鹽及其衍生物。較佳的可選用的其他整平劑添加劑係選自含氮有機化合物。該可選用的整平劑添加劑化合物係以0.1 mg/l至100 mg/l之量添加至該水性預處理組合物中。
該水性預處理組合物可另外含有至少一種載劑-抑制劑添加劑。該至少一種可選用的載劑-抑制劑添加劑通常係聚烷二醇化合物且係選自包含以下物質之群:聚乙烯醇、羧甲基纖維素、聚乙二醇、聚丙二醇、硬脂酸聚乙二醇酯、烷氧基化萘酚、油酸聚乙二醇酯、硬脂醇聚乙二醇醚、壬基酚聚乙二醇醚、辛醇聚烷二醇醚、辛二醇-雙-(聚烷二醇醚)、(乙二醇/丙二醇)無規共聚物(poly(ethylenglycol-ran-propylenglycol))、聚(乙二醇)-嵌段-聚(丙二醇)-嵌段-聚(乙二醇)、及聚(丙二醇)-嵌段-聚(乙二醇)-嵌段-聚(丙二醇)。該可選用的載劑-抑制劑添加劑在該水性預處理組合物中之濃度係0.005 g/l至20 g/l,更佳0.01 g/l至5 g/l。
該水性預處理組合物可另外含有至少一種用量為20 mg/l
至200 mg/l(更佳30 mg/l至60 mg/l)之鹵離子(較佳係氯離子)源。
該水性預處理組合物可另外含有至少一種潤濕劑,其可係陽離子、陰離子或非離子界面活性劑。以非離子界面活性劑較佳。適用之潤濕劑及其濃度係先前技術中已知。
使該基板與該水性預處理組合物接觸1分鐘至25分鐘,更佳3分鐘至15分鐘。在接觸期間,該水性預處理組合物之溫度係維持於15℃至80℃,更佳20℃至60℃之間。
可藉由(例如)噴射或浸漬使該基板與該水性預處理組合物接觸。文中所述之方法可以習知浸漬槽技術(垂直處理)或在傳送帶式機器中(水平處理)進行。就半導體基板而言,待電鍍之基板之預處理可於真空中進行。
接著,用水清洗該基板並與水性酸性銅電鍍浴接觸。酸性銅電鍍浴之類型係不限於某些類型的酸性銅電鍍浴。對該基板施加電流用以電鍍。
較佳地,該水性酸性銅電鍍浴不含有式(I)整平劑添加劑。用於銅電解沈積之銅電鍍浴及方法參數係相關技術中已知且可由熟習此項技術者應用並使其適用於本發明方法。
在本發明之另一實施例中,使該基板與包含式(I)整平劑添加劑之水性酸性銅電鍍浴組合物接觸。
該至少一種式(I)整平劑添加劑在該水性酸性銅電鍍浴中之濃度係0.001 mg/l至100 mg/l,更佳0.005 mg/l至約10 mg/l及最佳0.01 mg/l至1 mg/l。
該水性酸性銅電鍍浴組合物具有2(更佳1)之pH值。
該水性酸性銅電鍍浴另外含有至少一種銅離子源,其較佳係選自包含硫酸銅及烷基磺酸銅(例如,甲磺酸銅)之群。該銅離子之濃度通常係15 g/l至75 g/l。
該水性酸性銅電鍍浴另外含有至少一種酸源,其較佳係選自包含硫酸、氟硼酸、磷酸及甲磺酸之群且通常以20 g/l至400 g/l(更佳50 g/l至300 g/l)之濃度添加。
視需要地,除該至少一種式(I)整平劑添加劑之外,該水性酸性銅電鍍浴含有至少一種選自包含以下物質之群之其他整平劑添加劑:含氮有機化合物(例如聚乙亞胺、烷氧基化聚乙亞胺、烷氧基化己內醯胺及其聚合物、二伸乙基三胺及六亞甲基四胺);有機染料(例如Janus Green B、Bismarck Brown Y及酸性紫7);含硫胺基酸(例如半胱胺酸);吩嗪鎓鹽及其衍生物。較佳的其他整平劑添加劑係選自含氮有機化合物。該可選用的整平劑添加劑化合物係以0.1 mg/l至100 mg/l之量添加至該水性酸性銅電鍍浴中。
該水性酸性銅電鍍浴較佳可另外含有至少一種促進劑-光亮劑添加劑,其係選自包含有機硫醇、硫化物、二硫化物及多硫化物化合物之群。較佳的促進劑-光亮劑添加劑係選自包含以下物質之群:3-(苯并噻唑基-2-硫)-丙基磺酸、3-巰基丙-1-磺酸、伸乙基二硫二丙基磺酸、雙-(對磺苯基)-二硫醚、雙-(ω-磺丁基)-二硫醚、雙-(ω-磺基羥丙基)-二硫醚、雙-(ω-磺丙基)-二硫醚、雙-(ω-磺丙基)-硫醚、甲基-(ω-磺丙基)-二硫醚、甲基-(ω-磺丙基)-三硫醚、
O-乙基-二硫碳酸-S-(ω-磺丙基)酯、硫乙醇酸、硫磷酸-O-乙基-雙-(ω-磺丙基)酯、硫磷酸-參-(ω-磺丙基)酯及其對應鹽。該水性酸性銅浴組合物中視需要存在的所有促進劑-光亮劑添加劑之濃度係0.01 mg/l至100 mg/l,更佳0.05 mg/l至10 mg/l。
該水性酸性銅電鍍浴可另外含有至少一種載劑-抑制劑添加劑,其係通常係聚烷二醇化合物且係選自包含以下物質之群:聚乙烯醇、羧甲基纖維素、聚乙二醇、聚丙二醇、硬脂酸聚乙二醇酯、烷氧基化萘酚、油酸聚乙二醇酯、硬脂醇聚乙二醇醚、壬基酚聚乙二醇醚、辛醇聚烷二醇醚、辛二醇-雙-(聚烷二醇醚)、(乙二醇/丙二醇)無規共聚物、聚(乙二醇)-嵌段-聚(丙二醇)-嵌段-聚(乙二醇)、及聚(丙二醇)-嵌段-聚(乙二醇)-嵌段-聚(丙二醇)。該載劑-抑制劑添加劑之濃度係0.005 g/l至20 g/l,更佳0.01 g/l至5 g/l。
該水性酸性銅電鍍浴視需要另外含有至少一種用量為20 mg/l至200 mg/l(更佳30 mg/l至60 mg/l)之鹵離子(較佳係氯離子)源。
在本發明方法中,於15℃至50℃(更佳25℃至40℃)之溫度下,藉由對基板施加電流來操作該水性酸性銅電鍍浴。施加0.01 A/dm2至12 A/dm2(更佳0.1 A/dm2至7 A/dm2)之陰極電流密度。
在本發明之另一實施例中,先將待自該水性酸性銅電鍍浴經銅塗佈之基板浸漬於水性預處理組合物中,然後浸漬
於該酸性銅電鍍浴中。該水性預處理組合物包含至少一種式(I)整平劑添加劑且其中該水性預處理組合物不含有銅離子。視需要地,該基板在浸漬於該水性預處理組合物中之後係經水清洗。
現將參照以下非限制性實例闡釋本發明。
充分的BMV銅填充意指銅沈積物無或幾乎無所謂的凹坑(BMV處之銅表面凹陷)。因此,充分填充型BMV之銅表面係儘可能均勻。
不充分BMV填充之特徵係銅沈積物之凹形結構,即凹坑。銅填充型通孔中之空隙亦係不充分。
設備:1.8 L體積之Garnell電池、泵致浴攪動、無空氣注射、可溶性銅陽極。
使用包含45 g/l Cu2+離子(以硫酸銅形式添加)、150 g/l硫酸、50 mg/l Cl-離子、100 mg/l Fe2+離子、300 mg/l聚乙二醇作為載劑-抑制劑添加劑及0.5 mg/l雙-(鈉磺丙基)-二硫醚(SPS)作為促進劑-光亮劑添加劑之銅浴原液。將整平劑添加劑添加至該原液中。
銅電鍍參數:2 A電池電流、67分鐘電鍍時間、用於進一步研究之測試板區域中約18-20 μm之銅層厚度、在所有實驗之前於2 A下進行90分鐘虛設基板電鍍。
實例1至6中所使用的測試板佈置包含尺寸為(例如)100 x 80 μm、120 x 80 μm、150 x 80 μm、150 x 60 μm之微盲孔
及溝槽結構。
將3-胺基-5-巰基-1,2,4-三唑以0.3 mg/l之濃度添加至該水性酸性電鍍浴中作為整平劑添加劑。利用光學顯微鏡研究銅電鍍後之BMV橫截面。該整平劑添加劑之BMV填充性質係不充分(圖1)。
添加0.3 mg/l濃度之5-苯基-1H-1,2,4-三唑-3-硫醇(EP 1 069 211 A2)作為整平劑添加劑。利用光學顯微鏡研究銅電鍍後之BMV橫截面。該整平劑添加劑之BMV填充性質係不充分。
添加0.3 mg/l濃度之4-胺基-5-(4'-吡啶基)-4H-1,2,4-三唑-3-硫醇(EP 1 069 211 A2)作為整平劑添加劑。利用光學顯微鏡研究銅電鍍後之BMV橫截面。該整平劑添加劑之BMV填充性質係不充分。
將1-[2-(二甲胺基)乙基]-1H-四唑-5-硫醇以0.3 mg/l之濃度添加至電鍍浴中作為整平劑添加劑。利用光學顯微鏡研究銅電鍍後之BMV橫截面。該整平劑添加劑之BMV填充性質係充分(圖2)。
將1-[2-(二甲胺基)乙基]-三唑-5-硫醇以0.3 mg/l之濃度添加至電鍍浴中作為整平劑添加劑。利用光學顯微鏡研究
銅電鍍後之BMV橫截面。該整平劑添加劑之BMV填充性質係充分。
將1-[2-(二甲胺基)乙基]-二唑-5-硫醇以0.3 mg/l之濃度添加至電鍍浴中作為整平劑添加劑。利用光學顯微鏡研究銅電鍍後之BMV橫截面。該整平劑添加劑之BMV填充性質係充分。
首先將具有尺寸為20×100 μm之TSV結構之矽基板浸漬於DI水中,然後浸漬於實例7至10之水性預處理組合物中10分鐘,使用DI水清洗且然後進行電解銅電鍍。
使用包含硫酸銅、硫酸、促進劑-光亮劑添加劑、非式(I)分子之整平劑添加劑、載劑-抑制劑添加劑及氯離子之銅電鍍浴進行步驟(iii)中之電解銅電鍍。電鍍參數係於0.1 A/dm2下進行120分鐘,接著於0.2 A/dm2下進行60分鐘。
電鍍設備:Nexx電鍍工具
在銅電鍍前,將矽基板於由4 mg/l雙-(ω-磺丙基)-二硫醚促進劑-光亮劑添加劑及無整平劑添加劑組成之水性預處理組合物中浸漬10分鐘。在銅電鍍後,TSV橫截面之顯微照片顯示大空隙(圖3)。
將矽基板於由50 mg/l非式(I)分子之整平劑添加劑及4 mg/l雙-(ω-磺丙基)-二硫醚促進劑-光亮劑添加劑組成之水
性預處理組合物中浸漬10分鐘,用水清洗且然後進行銅電鍍。在銅電鍍後,TSV橫截面之顯微照片顯示凹坑。因此,該通孔填充係不充分(圖4)。
將矽基板於包含50 mg/l 1-[2-(二甲胺基)乙基]-1H-四唑-5-硫醇作為式(I)整平劑添加劑及4 mg/l雙-(ω-磺丙基)-二硫醚作為促進劑-光亮劑添加劑之水性預處理組合物中浸漬10分鐘,用水清洗且然後進行銅電鍍。在銅電鍍後,TSV橫截面之顯微照片係無空隙且該通孔填充係充分(圖5)。
將矽基板於由50 mg/ l1-[2-(二甲胺基)乙基]-二唑-5-硫醇整平劑添加劑及4 mg/l雙-(ω-磺丙基)-二硫醚促進劑-光亮劑添加劑組成之水性預處理組合物中浸漬10分鐘,用水清洗且然後進行銅電鍍。在銅電鍍後,TSV橫截面之顯微照片係無空隙且該通孔填充係充分(圖6)。
將包含經無電鍍銅層塗佈之微盲孔(直徑:85 μm;深度:50 μm)之基板於由50 mg/l 1-[2-(二甲胺基)乙基]-四唑-5-硫醇整平劑添加劑及4 mg/l雙-(ω-磺丙基)-二硫醚促進劑-光亮劑添加劑及硫酸組成之水性預處理組合物中浸漬10分鐘,用水清洗且然後使用如實例7至10所述之相同銅電鍍浴組合物進行銅電鍍。所施加的電流密度係1.0 A/dm2。在銅電鍍後,BMV橫截面之顯微照片係無空隙且顯示3.4 μm之凹坑及位於基板表面上之7.1 μm銅層厚度(圖
7)。因此,滿足充分BMV填充之要求。
圖1顯示自實例1(對照)獲得的填充型BMV之光學顯微照片。
圖2顯示自實例4(本發明)獲得的填充型BMV之光學顯微照片。
圖3顯示自實例7(對照)獲得的銅填充型TSV之光學顯微照片。
圖4顯示自實例8(對照)獲得的銅填充型TSV之光學顯微照片。
圖5顯示自實例9(本發明)獲得的銅填充型TSV之光學顯微照片。
圖6顯示自實例10(對照)獲得的銅填充型TSV之光學顯微照片。
圖7顯示自實例11(本發明)獲得的銅填充型BMV之光學顯微照片。
Claims (9)
- 一種於電鍍浴中電鍍銅之方法,其中使基板在銅電鍍之前及/或期間與整平劑添加劑接觸且其中該整平劑添加劑係選自式(I)分子:
- 如請求項1之銅電鍍方法,其包括以下步驟:(A)使該基板與包含以下物質之水性酸性銅電鍍浴接觸:(i)至少一種銅離子源;(ii)至少一種酸;及(iii)至少一種式(I)整平劑添加劑;及(B)對該基板施加電流。
- 如請求項1之銅電鍍方法,其包括以下步驟: (A1)使該基板與包含以下物質之水性預處理組合物接觸:(i)至少一種酸;及(ii)至少一種式(I)整平劑添加劑;(A2)使該基板與水性酸性銅電鍍浴接觸;及(B)對該基板施加電流。
- 如請求項1至3中任一項之銅電鍍方法,其中如果Y係選自-(NR4)-、-O-及-S-,則n係1至6。
- 如請求項1至3中任一項之銅電鍍方法,其中Y係選自由-(CH2)-及-(NR4)-組成之群。
- 如請求項1至3中任一項之銅電鍍方法,其中R4係選自氫、甲基及乙基。
- 如請求項1至3中任一項之銅電鍍方法,其中n係1至3。
- 如請求項1至3中任一項之銅電鍍方法,其中該式(I)整平劑添加劑之濃度係0.001至100 mg/l。
- 如請求項2或3之銅電鍍方法,其中該至少一種酸係選自包含硫酸、氟硼酸、磷酸及甲磺酸之群。
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JP (1) | JP6012723B2 (zh) |
KR (1) | KR101899621B1 (zh) |
CN (1) | CN103703167B (zh) |
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Cited By (5)
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US10654101B2 (en) | 2015-05-15 | 2020-05-19 | Sumitomo Metal Mining Co., Ltd. | Silver-coated copper powder, copper paste using same, conductive coating material, conductive sheet, and method for producing silver-coated copper powder |
US10695830B2 (en) | 2015-05-15 | 2020-06-30 | Sumitomo Metal Mining Co., Ltd. | Copper powder, copper paste using same, conductive coating material, conductive sheet, and method for producing copper powder |
EP3351657A1 (en) * | 2017-01-23 | 2018-07-25 | Rohm and Haas Electronic Materials LLC | Electroless copper plating compositions |
TWI706059B (zh) * | 2018-02-19 | 2020-10-01 | 韓國生產技術研究院 | 高平整度銅電鍍方法及銅電鍍品 |
TWI694179B (zh) * | 2018-05-25 | 2020-05-21 | 韓國生產技術研究院 | 高平整銅電鍍方法及銅電鍍產品 |
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