KR20100005493A - 구리배선 형성방법 - Google Patents
구리배선 형성방법 Download PDFInfo
- Publication number
- KR20100005493A KR20100005493A KR1020080065545A KR20080065545A KR20100005493A KR 20100005493 A KR20100005493 A KR 20100005493A KR 1020080065545 A KR1020080065545 A KR 1020080065545A KR 20080065545 A KR20080065545 A KR 20080065545A KR 20100005493 A KR20100005493 A KR 20100005493A
- Authority
- KR
- South Korea
- Prior art keywords
- cobalt
- citrate
- hydrate
- copper wiring
- forming
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 72
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052802 copper Inorganic materials 0.000 claims abstract description 52
- 239000010949 copper Substances 0.000 claims abstract description 52
- 150000001875 compounds Chemical class 0.000 claims abstract description 17
- 150000002500 ions Chemical class 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 9
- 239000008139 complexing agent Substances 0.000 claims abstract description 9
- 238000007517 polishing process Methods 0.000 claims abstract description 7
- 239000004065 semiconductor Substances 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
- -1 Co(II) ion Chemical class 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- RJTANRZEWTUVMA-UHFFFAOYSA-N boron;n-methylmethanamine Chemical compound [B].CNC RJTANRZEWTUVMA-UHFFFAOYSA-N 0.000 claims description 8
- 239000001509 sodium citrate Substances 0.000 claims description 7
- 235000011083 sodium citrates Nutrition 0.000 claims description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims description 6
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 claims description 6
- MEYVLGVRTYSQHI-UHFFFAOYSA-L cobalt(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Co+2].[O-]S([O-])(=O)=O MEYVLGVRTYSQHI-UHFFFAOYSA-L 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 239000004135 Bone phosphate Substances 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 239000003002 pH adjusting agent Substances 0.000 claims description 5
- GHCZTIFQWKKGSB-UHFFFAOYSA-N 2-hydroxypropane-1,2,3-tricarboxylic acid;phosphoric acid Chemical compound OP(O)(O)=O.OC(=O)CC(O)(C(O)=O)CC(O)=O GHCZTIFQWKKGSB-UHFFFAOYSA-N 0.000 claims description 4
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 4
- ZFOZVQLOBQUTQQ-UHFFFAOYSA-N Tributyl citrate Chemical compound CCCCOC(=O)CC(O)(C(=O)OCCCC)CC(=O)OCCCC ZFOZVQLOBQUTQQ-UHFFFAOYSA-N 0.000 claims description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004327 boric acid Substances 0.000 claims description 4
- FCEOGYWNOSBEPV-FDGPNNRMSA-N cobalt;(z)-4-hydroxypent-3-en-2-one Chemical compound [Co].C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O FCEOGYWNOSBEPV-FDGPNNRMSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- YXVFQADLFFNVDS-UHFFFAOYSA-N diammonium citrate Chemical compound [NH4+].[NH4+].[O-]C(=O)CC(O)(C(=O)O)CC([O-])=O YXVFQADLFFNVDS-UHFFFAOYSA-N 0.000 claims description 4
- HHLFWLYXYJOTON-UHFFFAOYSA-N glyoxylic acid Chemical compound OC(=O)C=O HHLFWLYXYJOTON-UHFFFAOYSA-N 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- HDDLVZWGOPWKFW-UHFFFAOYSA-N trimethyl 2-hydroxypropane-1,2,3-tricarboxylate Chemical compound COC(=O)CC(O)(C(=O)OC)CC(=O)OC HDDLVZWGOPWKFW-UHFFFAOYSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 150000004683 dihydrates Chemical class 0.000 claims description 3
- OKACJAWUVWBEAR-UHFFFAOYSA-K 1,3,6,8,10,13,16,19-octazabicyclo[6.6.6]icosane;trichlorocobalt Chemical compound [Cl-].[Cl-].[Cl-].[Co+3].C1NCCNCN2CNCCNCN1CNCCNC2 OKACJAWUVWBEAR-UHFFFAOYSA-K 0.000 claims description 2
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 claims description 2
- WWXUGNUFCNYMFK-UHFFFAOYSA-N Acetyl citrate Chemical compound CC(=O)OC(=O)CC(O)(C(O)=O)CC(O)=O WWXUGNUFCNYMFK-UHFFFAOYSA-N 0.000 claims description 2
- QZCLKYGREBVARF-UHFFFAOYSA-N Acetyl tributyl citrate Chemical compound CCCCOC(=O)CC(C(=O)OCCCC)(OC(C)=O)CC(=O)OCCCC QZCLKYGREBVARF-UHFFFAOYSA-N 0.000 claims description 2
- 229910021580 Cobalt(II) chloride Inorganic materials 0.000 claims description 2
- 229910021503 Cobalt(II) hydroxide Inorganic materials 0.000 claims description 2
- 229910021584 Cobalt(II) iodide Inorganic materials 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- DOOTYTYQINUNNV-UHFFFAOYSA-N Triethyl citrate Chemical compound CCOC(=O)CC(O)(C(=O)OCC)CC(=O)OCC DOOTYTYQINUNNV-UHFFFAOYSA-N 0.000 claims description 2
- PCLONZCDFMRSKV-UHFFFAOYSA-N ac1muxpu Chemical compound [Co+2].[N-]1C(N=C2C3=CC4=CC=CC=C4C=C3C(N=C3C4=CC5=CC=CC=C5C=C4C(=N4)[N-]3)=N2)=C(C=C2C(C=CC=C2)=C2)C2=C1N=C1C2=CC3=CC=CC=C3C=C2C4=N1 PCLONZCDFMRSKV-UHFFFAOYSA-N 0.000 claims description 2
- YMNRWRKDEPEIAQ-UHFFFAOYSA-M chloromethyl(triphenyl)phosphanium;iodide Chemical compound [I-].C=1C=CC=CC=1[P+](C=1C=CC=CC=1)(CCl)C1=CC=CC=C1 YMNRWRKDEPEIAQ-UHFFFAOYSA-M 0.000 claims description 2
- SVAAPDAHDVBOMW-ORWWTJHYSA-N cobalt (E)-3-hydroxy-1-phenylbut-2-en-1-one Chemical compound [Co].C\C(O)=C/C(=O)c1ccccc1.C\C(O)=C/C(=O)c1ccccc1 SVAAPDAHDVBOMW-ORWWTJHYSA-N 0.000 claims description 2
- GFHNAMRJFCEERV-UHFFFAOYSA-L cobalt chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Co+2] GFHNAMRJFCEERV-UHFFFAOYSA-L 0.000 claims description 2
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 claims description 2
- QGUAJWGNOXCYJF-UHFFFAOYSA-N cobalt dinitrate hexahydrate Chemical compound O.O.O.O.O.O.[Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O QGUAJWGNOXCYJF-UHFFFAOYSA-N 0.000 claims description 2
- MPMSMUBQXQALQI-UHFFFAOYSA-N cobalt phthalocyanine Chemical compound [Co+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 MPMSMUBQXQALQI-UHFFFAOYSA-N 0.000 claims description 2
- QAEKNCDIHIGLFI-UHFFFAOYSA-L cobalt(2+);2-ethylhexanoate Chemical compound [Co+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O QAEKNCDIHIGLFI-UHFFFAOYSA-L 0.000 claims description 2
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 claims description 2
- ZBYYWKJVSFHYJL-UHFFFAOYSA-L cobalt(2+);diacetate;tetrahydrate Chemical compound O.O.O.O.[Co+2].CC([O-])=O.CC([O-])=O ZBYYWKJVSFHYJL-UHFFFAOYSA-L 0.000 claims description 2
- UECCBWFRUWBPPG-UHFFFAOYSA-N cobalt(2+);dicyanide;dihydrate Chemical compound O.O.[Co+2].N#[C-].N#[C-] UECCBWFRUWBPPG-UHFFFAOYSA-N 0.000 claims description 2
- MNHUTFNEBYCZAF-UHFFFAOYSA-L cobalt(2+);difluoride;tetrahydrate Chemical compound O.O.O.O.[F-].[F-].[Co+2] MNHUTFNEBYCZAF-UHFFFAOYSA-L 0.000 claims description 2
- AVWLPUQJODERGA-UHFFFAOYSA-L cobalt(2+);diiodide Chemical compound [Co+2].[I-].[I-] AVWLPUQJODERGA-UHFFFAOYSA-L 0.000 claims description 2
- BSUSEPIPTZNHMN-UHFFFAOYSA-L cobalt(2+);diperchlorate Chemical compound [Co+2].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O BSUSEPIPTZNHMN-UHFFFAOYSA-L 0.000 claims description 2
- QOQSIXJUYVUEMP-UHFFFAOYSA-H cobalt(2+);diphosphate;octahydrate Chemical compound O.O.O.O.O.O.O.O.[Co+2].[Co+2].[Co+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QOQSIXJUYVUEMP-UHFFFAOYSA-H 0.000 claims description 2
- IUYLTEAJCNAMJK-UHFFFAOYSA-N cobalt(2+);oxygen(2-) Chemical compound [O-2].[Co+2] IUYLTEAJCNAMJK-UHFFFAOYSA-N 0.000 claims description 2
- BGORGFZEVHFAQU-UHFFFAOYSA-L cobalt(2+);sulfate;hydrate Chemical compound O.[Co+2].[O-]S([O-])(=O)=O BGORGFZEVHFAQU-UHFFFAOYSA-L 0.000 claims description 2
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(II) oxide Inorganic materials [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 2
- BZRRQSJJPUGBAA-UHFFFAOYSA-L cobalt(ii) bromide Chemical compound Br[Co]Br BZRRQSJJPUGBAA-UHFFFAOYSA-L 0.000 claims description 2
- QVYIMIJFGKEJDW-UHFFFAOYSA-N cobalt(ii) selenide Chemical compound [Se]=[Co] QVYIMIJFGKEJDW-UHFFFAOYSA-N 0.000 claims description 2
- PKSIZOUDEUREFF-UHFFFAOYSA-N cobalt;dihydrate Chemical compound O.O.[Co] PKSIZOUDEUREFF-UHFFFAOYSA-N 0.000 claims description 2
- JUPWRUDTZGBNEX-UHFFFAOYSA-N cobalt;pentane-2,4-dione Chemical compound [Co].CC(=O)CC(C)=O.CC(=O)CC(C)=O.CC(=O)CC(C)=O JUPWRUDTZGBNEX-UHFFFAOYSA-N 0.000 claims description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 2
- HWPKGOGLCKPRLZ-UHFFFAOYSA-M monosodium citrate Chemical compound [Na+].OC(=O)CC(O)(C([O-])=O)CC(O)=O HWPKGOGLCKPRLZ-UHFFFAOYSA-M 0.000 claims description 2
- 235000018342 monosodium citrate Nutrition 0.000 claims description 2
- 239000002524 monosodium citrate Substances 0.000 claims description 2
- 229910052700 potassium Inorganic materials 0.000 claims description 2
- 229960003975 potassium Drugs 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 239000001508 potassium citrate Substances 0.000 claims description 2
- 229960002635 potassium citrate Drugs 0.000 claims description 2
- QEEAPRPFLLJWCF-UHFFFAOYSA-K potassium citrate (anhydrous) Chemical compound [K+].[K+].[K+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O QEEAPRPFLLJWCF-UHFFFAOYSA-K 0.000 claims description 2
- 235000011082 potassium citrates Nutrition 0.000 claims description 2
- 239000012279 sodium borohydride Substances 0.000 claims description 2
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 2
- 229960001790 sodium citrate Drugs 0.000 claims description 2
- 229960000999 sodium citrate dihydrate Drugs 0.000 claims description 2
- 229910001379 sodium hypophosphite Inorganic materials 0.000 claims description 2
- LNIZKKFWMDARJV-UHFFFAOYSA-H tricalcium;2-hydroxypropane-1,2,3-tricarboxylate;tetrahydrate Chemical compound O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O LNIZKKFWMDARJV-UHFFFAOYSA-H 0.000 claims description 2
- WEAPVABOECTMGR-UHFFFAOYSA-N triethyl 2-acetyloxypropane-1,2,3-tricarboxylate Chemical compound CCOC(=O)CC(C(=O)OCC)(OC(C)=O)CC(=O)OCC WEAPVABOECTMGR-UHFFFAOYSA-N 0.000 claims description 2
- 239000001069 triethyl citrate Substances 0.000 claims description 2
- VMYFZRTXGLUXMZ-UHFFFAOYSA-N triethyl citrate Natural products CCOC(=O)C(O)(C(=O)OCC)C(=O)OCC VMYFZRTXGLUXMZ-UHFFFAOYSA-N 0.000 claims description 2
- 235000013769 triethyl citrate Nutrition 0.000 claims description 2
- 150000004684 trihydrates Chemical class 0.000 claims description 2
- OSJRPECIECUBOG-UHFFFAOYSA-K trilithium;2-hydroxypropane-1,2,3-tricarboxylate;hydrate Chemical compound [Li+].[Li+].[Li+].O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O OSJRPECIECUBOG-UHFFFAOYSA-K 0.000 claims description 2
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims description 2
- PKIDNTKRVKSLDB-UHFFFAOYSA-K trisodium;2-hydroxypropane-1,2,3-tricarboxylate;hydrate Chemical compound O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O PKIDNTKRVKSLDB-UHFFFAOYSA-K 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims 1
- 229910017052 cobalt Inorganic materials 0.000 claims 1
- 239000010941 cobalt Substances 0.000 claims 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims 1
- INDBQWVYFLTCFF-UHFFFAOYSA-L cobalt(2+);dithiocyanate Chemical compound [Co+2].[S-]C#N.[S-]C#N INDBQWVYFLTCFF-UHFFFAOYSA-L 0.000 claims 1
- IRJNTBRBTUYLDI-UHFFFAOYSA-K copper;sodium;2-hydroxypropane-1,2,3-tricarboxylate Chemical compound [Na+].[Cu+2].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O IRJNTBRBTUYLDI-UHFFFAOYSA-K 0.000 claims 1
- 238000009792 diffusion process Methods 0.000 abstract description 12
- 230000002265 prevention Effects 0.000 abstract description 2
- 239000012459 cleaning agent Substances 0.000 abstract 2
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000003064 anti-oxidating effect Effects 0.000 description 2
- 238000007772 electroless plating Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910021582 Cobalt(II) fluoride Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 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
- 239000012298 atmosphere Substances 0.000 description 1
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 description 1
- YCYBZKSMUPTWEE-UHFFFAOYSA-L cobalt(ii) fluoride Chemical compound F[Co]F YCYBZKSMUPTWEE-UHFFFAOYSA-L 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000009279 wet oxidation reaction Methods 0.000 description 1
Images
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
- H01L21/70—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
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/7684—Smoothing; Planarisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/32115—Planarisation
- H01L21/3212—Planarisation by chemical mechanical polishing [CMP]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Cleaning Or Drying Semiconductors (AREA)
Abstract
Description
용도 | 화합물 | 농도 |
Co source | CoSO4 | 2.0 g |
환원제 | Dimethylamine borane | 0.058g |
착물형성제 | Sodium citrate | 13.6 g |
pH 조절제 | Boric acid | 6.18g |
NaOH | 2.65g | |
공정 조건 | ||
세정액 온도 | 80℃ | |
세정액 공급 속도 | 150mL/min |
Claims (23)
- 반도체 기판 상에 구리층을 형성한 후에, 연마공정과 완화공정을 포함하여 이루어지는 화학적 기계적 연마방법으로 구리배선을 형성하는 방법에 있어서,용매제와, 환원제와, pH 조절제와, 착물형성제와, Co(Ⅱ) 이온 또는 Co(Ⅲ) 이온을 포함하는 화합물이 포함된 세정액을 사용하여 상기 완화공정을 실시함으로써 상기 구리배선 상에 캡핑막을 형성하는 것을 특징으로 하는 구리배선 형성방법.
- 제 1항에 있어서, 상기 용매제는 탈이온수인 것을 특징으로 하는 구리배선 형성방법.
- 제 1항에 있어서, 상기 Co(Ⅱ) 이온을 포함하는 화합물은 Cobalt(Ⅱ) acetate, Cobalt(Ⅱ) acetate tetrahydrate, Cobalt(Ⅱ) acetylacetonate, Cobalt(Ⅱ) acetylacetonate hydrate, Cobalt(Ⅱ) benzoylacetonate, Cobalt(Ⅱ) bromide, Cobalt(Ⅱ) bromide hydrate, Cobalt(Ⅱ) carbonate hydrate, Cobalt(Ⅱ) chloride, Cobalt(Ⅱ) chloride hexahydrate, Cobalt(Ⅱ) cyanide dihydrate, Cobalt(Ⅱ) 2-ethylhexanoate, Cobalt(Ⅱ) fluoride, Cobalt(Ⅱ) fluoride tetrahydrate, Cobalt(Ⅱ) hexafluoroacetylacetonate, Cobalt(Ⅱ) hydroxide, Cobalt(Ⅱ) iodide, Cobalt(Ⅱ) 2,3-naphthalocyanine, Cobalt(Ⅱ) nitrate hexahydrate, Cobalt(Ⅱ) oxalated dihydrate, Cobalt(Ⅱ) oxide, Cobalt(Ⅱ) perchlorate hexahydrate, Cobalt(Ⅱ) phosphate hydrate, Cobalt(Ⅱ) phthalocyanine, Cobalt(Ⅱ) selenide, Cobalt(Ⅱ) sulfate heptahydrate, Cobalt(Ⅱ) sulfate hydrate, Cobalt(Ⅱ) tetrafluoroborate, Cobalt(Ⅱ) thiocyanate 중에서 선택된 적어도 어느 하나인 것을 특징으로 하는 구리배선 형성방법.
- 제 1항에 있어서, 상기 Co(Ⅲ) 이온을 포함하는 화합물은 Cobalt(Ⅲ) acetylacetonate 또는 Cobalt(Ⅲ) sepulchrate trichloride인 것을 특징으로 하는 구리배선 형성방법.
- 제 3항에 있어서, 상기 Co(Ⅱ) 이온을 포함하는 화합물은 Cobalt(Ⅱ) sulfate heptahydrate를 사용하는 것을 특징으로 하는 구리배선 형성방법.
- 제 5항에 있어서, 상기 Cobalt(Ⅱ) sulfate heptahydrate의 첨가량은 0.001 wt% ~ 20 wt%인 것을 특징으로 하는 구리배선 형성방법.
- 제 6항에 있어서, 상기 Cobalt(Ⅱ) sulfate heptahydrate의 첨가량은 0.005 wt% ~ 10 wt%인 것을 특징으로 하는 구리배선 형성방법.
- 제 1항에 있어서, 상기 환원제는 dimethylamine borane, sodium borohydride, sodium hypophosphite, formaldehyde, hydrazine 및 glyoxylic acid중에서 선택된 적어도 어느 하나인 것을 특징으로 하는 구리배선 형성방법.
- 제 8항에 있어서, 상기 환원제는 dimethylamine borane인 것을 특징으로 하는 구리배선 형성방법.
- 제 9항에 있어서, 상기 dimethylamine borane의 첨가량은 0.001 wt% ~ 30 wt%인 것을 특징으로 하는 구리배선 형성방법.
- 제 10항에 있어서, 상기 dimethylamine borane의 첨가량은 0.005 wt% ~ 10 wt%인 것을 특징으로 하는 구리배선 형성방법.
- 제 1항에 있어서, 상기 pH 조절제는 boric acid와 NaOH의 혼합용액인 것을 특징으로 하는 구리배선 형성방법.
- 제 12항에 있어서, 상기 혼합용액의 첨가량은 0.01 wt% ~ 20 wt%인 것을 특징으로 하는 구리배선 형성방법.
- 제 13항에 있어서, 상기 혼합용액의 첨가량은 0.05 wt% ~ 10 wt%인 것을 특징으로 하는 구리배선 형성방법.
- 제 1항에 있어서, 상기 세정액의 pH는 7 ~ 14인 것을 특징으로 하는 구리배선 형성방법.
- 제 15항에 있어서, 상기 세정액의 pH는 8 ~ 12인 것을 특징으로 하는 구리배선 형성방법.
- 제 1항에 있어서, 상기 착물형성제는 2염기 또는 3염기의 구연산염을 포함하는 화합물이거나 또는 상기 구연산염의 수화물을 포함하는 화합물인 것을 특징으로 하는 구리배선 형성방법.
- 제 17항에 있어서, 상기 구연산염을 포함하는 화합물은 ammonium citrate, di-ammonium hydrogen citrate, calcium citrate tribasic tetrahydrate, lithium citrate hydrate, sodium dihydrogen citrate, potassium citrate-1-hydrate, tri-sodium citrate hydrate, sodium citrate, sodium citrate tribasic dihydrate, tributyl citrate, triethyl citrate, trimethyl citrate, citrate phosphate, triethyl O-acetyl citrate, tributyl O-acetyl citrate, trimethyl O-acetyl citrate, sodium citrate dihydrate, potassium citrate, sodium citrate tribasic trihydrate, sodium citrate tribasic dihydrate, phosphate citrate 인 것을 특징으로 하는 구리배선 형성방법.
- 제 17항에 있어서, 상기 착물형성제는 sodium citrate인 것을 특징으로 하는 구리배선 형성방법.
- 제 19항에 있어서, 상기 착물형성제의 첨가량은 0.1 wt% ~ 30 wt% 인 것을 특징으로 하는 구리배선 형성방법.
- 제 20항에 있어서, 상기 착물형성제의 첨가량은 0.5 wt% ~ 20 wt%인 것을 특징으로 하는 구리배선 형성방법.
- 제 1항에 있어서, 상기 세정액의 온도는 50℃ ~ 90℃인 것을 특징으로 하는 구리배선 형성방법.
- 제 22항에 있어서, 상기 세정액의 온도는 60℃ ~ 80℃인 것을 특징으로 하는 구리배선 형성방법.
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