CN1410501A - 一种化学机械研磨浆料组成 - Google Patents
一种化学机械研磨浆料组成 Download PDFInfo
- Publication number
- CN1410501A CN1410501A CN02131650A CN02131650A CN1410501A CN 1410501 A CN1410501 A CN 1410501A CN 02131650 A CN02131650 A CN 02131650A CN 02131650 A CN02131650 A CN 02131650A CN 1410501 A CN1410501 A CN 1410501A
- Authority
- CN
- China
- Prior art keywords
- metal
- ozone
- slurry
- mechanical polishing
- chemical mechanical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000126 substance Substances 0.000 title claims description 28
- 239000000203 mixture Substances 0.000 title claims description 24
- 238000000227 grinding Methods 0.000 title abstract description 15
- 239000000463 material Substances 0.000 title description 3
- 239000002002 slurry Substances 0.000 claims abstract description 59
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000000654 additive Substances 0.000 claims abstract description 19
- 230000000996 additive effect Effects 0.000 claims abstract description 13
- 238000005498 polishing Methods 0.000 claims description 46
- 238000005260 corrosion Methods 0.000 claims description 18
- 230000007797 corrosion Effects 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000003112 inhibitor Substances 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 12
- CTRLRINCMYICJO-UHFFFAOYSA-N phenyl azide Chemical group [N-]=[N+]=NC1=CC=CC=C1 CTRLRINCMYICJO-UHFFFAOYSA-N 0.000 claims description 8
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 14
- 150000004706 metal oxides Chemical class 0.000 abstract description 14
- 230000001590 oxidative effect Effects 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000843 powder Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 36
- 239000002184 metal Substances 0.000 description 36
- 239000007800 oxidant agent Substances 0.000 description 33
- 238000006243 chemical reaction Methods 0.000 description 19
- 239000010949 copper Substances 0.000 description 15
- 239000010410 layer Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 15
- 238000007254 oxidation reaction Methods 0.000 description 15
- 238000006722 reduction reaction Methods 0.000 description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 13
- 229910052802 copper Inorganic materials 0.000 description 13
- 230000003647 oxidation Effects 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 239000004094 surface-active agent Substances 0.000 description 9
- -1 aluminum alloy (al) Chemical class 0.000 description 8
- 230000009467 reduction Effects 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 6
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 239000008139 complexing agent Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 229910021645 metal ion Inorganic materials 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- 239000011241 protective layer Substances 0.000 description 5
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- 239000004202 carbamide Substances 0.000 description 4
- 239000013626 chemical specie Substances 0.000 description 4
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium dioxide Chemical compound O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 description 4
- 229910052755 nonmetal Inorganic materials 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 3
- 150000001413 amino acids Chemical class 0.000 description 3
- 239000000908 ammonium hydroxide Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 3
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000006479 redox reaction Methods 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- SXFBQAMLJMDXOD-UHFFFAOYSA-N (+)-hydrogentartrate bitartrate salt Chemical compound OC(=O)C(O)C(O)C(O)=O.OC(=O)C(O)C(O)C(O)=O SXFBQAMLJMDXOD-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- YBCVMFKXIKNREZ-UHFFFAOYSA-N acoh acetic acid Chemical compound CC(O)=O.CC(O)=O YBCVMFKXIKNREZ-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 235000015165 citric acid Nutrition 0.000 description 2
- 229960004106 citric acid Drugs 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- YAGKRVSRTSUGEY-UHFFFAOYSA-N ferricyanide Chemical compound [Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] YAGKRVSRTSUGEY-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- QVLTXCYWHPZMCA-UHFFFAOYSA-N po4-po4 Chemical compound OP(O)(O)=O.OP(O)(O)=O QVLTXCYWHPZMCA-UHFFFAOYSA-N 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- 235000011056 potassium acetate Nutrition 0.000 description 2
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- KVZLHPXEUGJPAH-UHFFFAOYSA-N 2-oxidanylpropanoic acid Chemical compound CC(O)C(O)=O.CC(O)C(O)=O KVZLHPXEUGJPAH-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- RBIHPAASYUYQNM-UHFFFAOYSA-N OCl(=O)(=O)=O.OCl(=O)(=O)=O Chemical compound OCl(=O)(=O)=O.OCl(=O)(=O)=O RBIHPAASYUYQNM-UHFFFAOYSA-N 0.000 description 1
- MDBVZFGSKMWJFD-UHFFFAOYSA-N OP(O)=O.OP(O)(O)=O Chemical compound OP(O)=O.OP(O)(O)=O MDBVZFGSKMWJFD-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 239000005627 Triclopyr Substances 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- BTBJBAZGXNKLQC-UHFFFAOYSA-N ammonium lauryl sulfate Chemical compound [NH4+].CCCCCCCCCCCCOS([O-])(=O)=O BTBJBAZGXNKLQC-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- OVYQSRKFHNKIBM-UHFFFAOYSA-N butanedioic acid Chemical compound OC(=O)CCC(O)=O.OC(=O)CCC(O)=O OVYQSRKFHNKIBM-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 1
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 1
- 229940112669 cuprous oxide Drugs 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- MOTZDAYCYVMXPC-UHFFFAOYSA-N dodecyl hydrogen sulfate Chemical compound CCCCCCCCCCCCOS(O)(=O)=O MOTZDAYCYVMXPC-UHFFFAOYSA-N 0.000 description 1
- 229940043264 dodecyl sulfate Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002460 imidazoles Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- PANJMBIFGCKWBY-UHFFFAOYSA-N iron tricyanide Chemical compound N#C[Fe](C#N)C#N PANJMBIFGCKWBY-UHFFFAOYSA-N 0.000 description 1
- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- LFLZOWIFJOBEPN-UHFFFAOYSA-N nitrate, nitrate Chemical compound O[N+]([O-])=O.O[N+]([O-])=O LFLZOWIFJOBEPN-UHFFFAOYSA-N 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- NIFHFRBCEUSGEE-UHFFFAOYSA-N oxalic acid Chemical compound OC(=O)C(O)=O.OC(=O)C(O)=O NIFHFRBCEUSGEE-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- JLKDVMWYMMLWTI-UHFFFAOYSA-M potassium iodate Chemical compound [K+].[O-]I(=O)=O JLKDVMWYMMLWTI-UHFFFAOYSA-M 0.000 description 1
- 239000001230 potassium iodate Substances 0.000 description 1
- 229940093930 potassium iodate Drugs 0.000 description 1
- 235000006666 potassium iodate Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- HJSRRUNWOFLQRG-UHFFFAOYSA-N propanedioic acid Chemical compound OC(=O)CC(O)=O.OC(=O)CC(O)=O HJSRRUNWOFLQRG-UHFFFAOYSA-N 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- CBXWGGFGZDVPNV-UHFFFAOYSA-N so4-so4 Chemical compound OS(O)(=O)=O.OS(O)(=O)=O CBXWGGFGZDVPNV-UHFFFAOYSA-N 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 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
- 239000010409 thin film Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- REEQLXCGVXDJSQ-UHFFFAOYSA-N trichlopyr Chemical compound OC(=O)COC1=NC(Cl)=C(Cl)C=C1Cl REEQLXCGVXDJSQ-UHFFFAOYSA-N 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1454—Abrasive powders, suspensions and pastes for polishing
- C09K3/1463—Aqueous liquid suspensions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/02—Polishing compositions containing abrasives or grinding agents
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/32115—Planarisation
- H01L21/3212—Planarisation by chemical mechanical polishing [CMP]
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Abstract
一种化学机械研磨浆料组成。包含有一研磨粒成分金属氧化物、预定浓度的溶解态臭氧及添加剂,浆料组成的pH值介于1-10之间。通过臭氧作为CMP研磨浆料的氧化剂,具有较佳的氧化力,且可避免传统氧化剂易污染芯片表面或改变浆料pH值,具有较佳的研磨效果。
Description
技术领域
本发明是提供一种化学机械研磨(CMP)浆料组成,特指一种使用臭氧(ozone)作为氧化剂的浆料组成.
背景技术
随着集成电路元件朝向小而密集的趋势发展,一种利用多数层的金属内连线层以及低介电材料来将半导体芯片上的各个半导体元件彼此串接起来,而完成整个堆叠化的回路架构的多重金属化制程(multilevel metallizationprocess),业已被广泛地应用在VLSI/ULSI制程上,以于硅芯片上形成更多层次的架构。然而这些金属线及半导体元件会使得集成电路表面呈现高低起伏的陡峭地势(severe topography),增加后续在进行沉积或图案转移(patterntransfer)制程时的困难。因此芯片表面凸出的沉积层以及高低起伏的轮廓,都必须利用一平坦化制程(planarization process)来加以去除。
目前应用最广泛的全面平坦化技术为化学机械研磨法(chemical-mechanical polishing,简称CMP)。化学机械研磨法主要是利用类似“磨刀”的机械式研磨原理,配合研磨浆料(slurry)中的化学助剂(chemical additives)与芯片表面进行反应,将芯片表面高低起伏不定的轮廓,一并加以磨平的平坦化技术。一般若各种制程的参数控制得宜,CMP可提供被研磨表面达94%以上的平坦度。由于在进入深次微米(sub-micron)的半导体制程之后,曝光显影的分辨率与限制使得对平坦化的要求也越来越高,故半导体业者大多均使用平坦化效果较佳的化学机械研磨法来达到半导体芯片表面的全面平坦化。
化学机械研磨法(CMP)在80年代后期开始应用在金属层的平坦化上,这些金属材质包括铝合金(aluminum alloy)、钛(titanium)、氮化钛(titaniumnitride)、钨(tungsten)、钽(tantalum)以及铜(cupper)等金属,研磨这些金属材质将需要不同性质的研磨浆料并涉及相当复杂的化学反应。一般用来研磨硅氧层的研浆大多使用碱性的氢氧化钾(potassium hydroxide)或氢氧化铵(ammonium hydroxide)等溶液,来混合呈胶体状(Colloidal)的硅土(silica)或呈分散状(Dispersed)的铝土(Alumina),CMP制程也就是利用这些在研磨浆料中研磨性极高的颗粒作为研磨剂(abrasive),来对半导体芯片表面进行研磨。但是针对被研磨薄膜层材料为金属等材质时,研磨浆料的组成将另包括一些氧化剂(Oxidant)及有机溶剂(Organic Agents)等。
氧化剂为金属CMP研磨机制中相当重要的一环,利用氧化剂进行还原反应,可提高金属氧化状态,使金属表面形成一金属氧化层(metal oxide)。由于金属氧化层的硬度较金属低,CMP可利用研磨剂与研磨垫间的机械研磨快速去除,故利用金属氧化层的形成可改善CMP的研磨效率。此外,金属氧化层因覆盖在金属表面形成保护层,可防止内部金属被氧化。因此,当CMP制程进行时,芯片表面突出处可利用机械研磨去除金属表面的金属氧化层,而通过金属与研浆间的化学反应不断生成金属氧化层,而再度受到研磨;而在芯片表面凹进处,因金属氧化层可保护内部金属不受研磨浆料湿蚀刻影响,且不会受到研磨,故形成保护层的机制将可使芯片表面突出处被磨平,且可增进研磨后的芯片表面平坦度。
以铜CMP为例,铜在水溶液环境中可被氧化为氧化亚铜(cuprous oxide),其氧化半反应如下:
而其研磨时的腐蚀溶解反应为:
由于化学中的氧化还原反应是指参与反应的化学物种间电子转移,物种失去电子反应为氧化反应,反之,获得电子为还原反应。故一物种失去电子必伴随另一物种获得电子,氧化还原反应是同时发生的,因此,铜氧化必存在有氧化剂与铜相互反应,如铜与水中溶氧可进行氧化还原反应,其中氧气的还原半反应为:
除了氧气以外,酸性水溶液中金属亦容易被氧化,此乃由于水溶液中氢离子扮演氧化剂氧化金属,而其被还原成氢气逸出,其还原半反应为:
上述氧化还原反应是否为自然发生以及其热力学位能势,可由其氧化还原半反应电位正负及大小判定。当化学物种的还原半反应的电位为正,表示其反应自由能小于零,此还原反应(获得电子)为自发反应,故其为强氧化剂,反之,如其还原反应的电位为负,显示其不易进行还原反应。
此外,由于金属在进行还原反应时,会因不同氧化环境,而生成不同的稳定氧化物种,亦即进行不同的氧化反应。为了了解在不同研浆环境中金属所进行的氧化反应,以预测CMP研磨效能,Pourbaix针对大部份金属在纯水环境中的氧化反应及其热力学平衡产物制成Pourbaix图。
参阅图1-图2所示,为铜-纯水系统的Pourbaix图,显示铜在水溶液中的腐蚀行为。如图1-图2所示,在无氧化剂的环境下,铜不受pH值影响,均不被氧化而保持原有金属状态。而在酸性(pH<5)且具有高氧化能力的环境下,铜金属倾向于被氧化为水溶性铜离子(Cu2+),亦即进行腐蚀反应,而不生成铜氧化物于表面上。类似的腐蚀反应亦发生在高碱性(pH>13)具有氧化剂的水溶液中,铜金属倾向于氧化生成二氧化铜离子(CuO2 2-)溶解于水中。仅有在含氧化剂的微碱水溶液中(7<pH<13),铜金属可被氧化成氧化亚铜(Cu2O)或氧化铜(CuO),并在表面形成保护层。然而,图1仅为纯水溶液系统中的铜物种分布情形。在不同系统中将有不同分配情形,但由图1可知:pH值的不同与氧化剂的存在对物种分布有决定性的影响。
故对金属的化学机械研磨而言,金属氧化层的形成速率与性质是影响研磨表现(包括研磨技术、均匀性、平坦化效果、浅碟效应以及腐蚀效应等)的关键,而影响金属层的氧化行为主要则是取决于研浆中的氧化剂性质与浓度。
目前传统研浆中的氧化剂可分为两大类:
1.金属类氧化剂:这类氧化剂种类有硝酸铁(ferric nitrate,Fe(NO3)3)、碘酸钾(Potassium iodate,KIO3)以及铁氰离子(ferricyanide,Fe(CN)6 3-)等多数种。其中,由于铁氰离子在水溶液中配位稳定度佳,不易分解,故为常用的金属类氧化剂,其可被还原为亚铁氰离子(ferrocyanide,Fe(CN)6 4-),还原半反应如下:
在美国专利局US5340370号专利揭露一种可研磨钨的研磨浆料,即包含0.1M的铁氰化钾(potassium ferricyanide,K3Fe(CN)6),约5%氧化硅(silica)和乙酸钾(potassium acetate,CH3COOK),并加入醋酸(acetic acid)以调整pH在3.5左右。其主要缺陷在于:
此类金属类氧化剂在研磨过程中,可能造成芯片表面受金属离子(Fe3+、K+)污染,因此对金属化学机械研磨而言,目前的研浆皆朝向以添加非金属类的氧化剂为主。
2.非金属类氧化剂:过氧化氢(hydrogen peroxide,H2O2)是这类氧化剂中最常被使用的一种,其还原半反应如下:
在美国US5244534号专利提及一种包含铝、过氧化氢、氢氧化铝(或氢氧化钾)以去除钨金属的研磨浆料组成。
而在US5209816号专利揭露一种包含过氯酸(perchloric acid)、过氧化氢、固体研磨颗粒与水溶液基质(medium)的研磨浆料,可应用在铝金属研磨上。其主要缺陷在于:
过氧化氢有其限制性存在,过多的过氧化氢易导致芯片污染,且其还原反应会改变研磨浆料中的pH值,因而影响整个CMP系统研磨制程。
发明内容
本发明的主要目的在于提供一种化学机械研磨浆料组成,通过臭氧作为CMP研磨浆料的氧化剂,具有较佳的氧化力,且可避免传统氧化剂易污染芯片表面或改变浆料pH值,克服现有技术的弊端,达到较佳的研磨效果的目的。
本发明的目的是这样实现的:一种化学机械研磨浆料组成,其特征是:它包含有:氧化铝成分、预定浓度的溶解态臭氧及添加剂;该浆料组成的pH值介于1-10之间。
该臭氧的浓度是介于0.1-200ppm之间。该添加剂包含有腐蚀抑制剂,该腐蚀抑制剂为含氮环化合物,选自咪唑、苯基叠氮、苯并咪唑、苯并噻唑、尿素或所述化合物的衍生物的至少一种。该腐蚀抑制剂为苯基叠氮,其浓度约为0.01-0.2%。
本发明还提供另一种化学机械研磨浆料组成,其特征是:它包含有:氧化铝成分及含有预定浓度溶解态臭氧的臭氧水。
该臭氧水的臭氧浓度是介于0.1-200ppm之间。该浆料还包含有添加剂。该添加剂包含有腐蚀抑制剂,该腐蚀抑制剂为含氮环化合物,选自咪唑、苯基叠氮、苯并咪唑、苯并噻唑、尿素或所述化合物的衍生物的至少一种。该腐蚀抑制剂为苯基叠氮,其浓度约为0.01-0.2%。。
在本发明的实施例中,化学机械研磨(chemical mechanical polishing)浆料(slurry)包含有一金属氧化物的研磨粒(abrasives)成分,如氧化铝(alumina)、氧化硅(silica,SiO2)以及氧化铈(ceria,CeO2)等材料,一预定浓度的溶解态臭氧,以及一添加剂(additive)。其中该浆料组成的pH值介于1-10之间。
下面结合较佳实施例和附图进一步说明。
附图说明
图1为铜-纯水系统下的Pourbaix图一。
图2为铜-纯水系统下的Pourbaix图二。
图3为各化学物种的还原半反应电位表。
图4为本发明实施例1的研浆使用的实施例。
图5为本发明实施例2的研浆使用的实施例。
具体实施方式
本发明的化学机械研磨浆料包含有氧化铝的研磨颗粒、包含一些化学成分的添加剂以及包含臭氧成分的氧化剂。
本发明的研磨剂典型为金属氧化物,一般可用氧化铝(alumina)、氧化钛(titania)、氧化锆(zirconia)、氧化锗(germania)、氧化硅(silica)、氧化铈(ceria)以及上述化合物的混合。本发明的实施例为氧化铝,其重量百分率约为1.5-6%。
本发明的添加剂中包含有腐蚀抑制剂(corrosion inhibitor),以方便金属氧化物的保护层,而抑制金属表面的腐蚀反应。一般常用的腐蚀抑制剂为含氮环化合物(nitrogen containing cyclic compounds),如咪唑(imidazole,C3H4N2)、苯基叠氮(benzotriazole,BTA,C6H5N3)、苯并咪唑(benzimidazole,C7H6N2)、苯并噻唑(benzothiazole,C6H4SCHN)、尿素(urea,CO(NH2)2)及上述化合物的衍生物等。本发明的最佳的实施例为苯基叠氮(BTA),其浓度约为0.01-0.2%。
添加剂中尚可包含作为干扰物的错合剂(complexing agent),以干扰保护层,而使金属氧化物更容易由金属表面磨除。可使用的错合剂有柠檬酸(citricacid)、乳酸(lactic acid)、丙二酸(malonic)、酒石酸(tartaric acid)、琥珀酸(succinic acid)、乙酸(acetic acid)、草酸(oxalic acid)、氨基酸(aminoacid)、氨基硫酸(amino sulfuric acid)、磷酸(phosphoric acid)以及膦酸(phosphonic acid)等酸类。最佳实施例为酒石酸(tartaric acid),其重量百分浓度0.2-5%间。其中,本发明并不限定错合剂的添加,其它实施例亦可不包含此一成分。
此外,由于各种化学成分如错合剂与腐蚀抑制剂的添加,可能影响CMP研磨浆料的研磨剂颗粒分布稳定性,故添加剂亦可再包含如界面活性剂(surfactant)、稳定剂(stabilizer)或分散剂(dispersing agent)等以稳定CMP研磨浆料,避免凝聚(flocculation)、分解(decomposition)或沉淀(settling)。以界面活性剂为例,最佳实施例为十二烷基硫酸(dodecylsulfate)、抑草生(sodium salt)、月桂基硫酸钠(sodium lauryl sulfate)、十二烷基硫酸胺基盐(dodecyl sulfate ammonium salt)以及其混合。一般来说,添加的界面活性剂必须足够使研浆稳定,其依各种界面活性剂以及各金属氧化物研磨剂表面性质的不同而不同。界面活性剂的添加将使得芯片表面不均匀性降低,因而减少芯片表面瑕疵。但太多界面活性剂将发生泡沫化或凝聚的情形。故界面活性剂的添加约为0.001-0.2%左右。其中,本发明并不限定界面活性剂的添加,其它实施例亦可不包含此一成分。
参阅图3所示,本发明所使用的氧化剂为一非金属类的臭氧,其氧化电位为1.78V,氧化力仅次于氟(fluorine),较其它氧化剂如过氧化氢、铁氰离子等为高,因此将臭氧溶于溶液中,可轻易达到氧化的效果,其还原反应如下:
由于其还原半反应的产物为H2与O2,故无金属类氧化剂金属离子污染的问题,且无过氧化氢干扰研磨浆料中的pH值的问题。此外,由于臭氧在溶液中的饱和溶解量遵循亨利定律(m=kP),亦即压力与溶解度成正比,故通过制程参数的调整,臭氧的溶解度可得到极佳的控制。
本发明使用臭氧作为金属CMP研浆中的氧化剂,其实行的方式有两种实施例:
实施例1
参阅图4所示,将一预定浓度介于0.1-200ppm的溶解态臭氧直接通入包含有研磨剂、水、添加剂的研浆中使用。
实施例2
参阅图5所示,将预定浓度介于0.1-200ppm的溶解态臭氧通入去离子水中,以形成臭氧水,而后在研磨时将臭氧水溶液与包含有研磨剂、水、添加剂的研浆混合使用。
由于CMP研磨浆料的pH值对金属氧化后的化学物种有决定性的影响,故本发明中pH值需被维持在1-10间,以方便控制CMP制程。pH值可由酸碱或胺(amine)调整,但需限制不含金属离子,如氢氧化铵(ammonium hydroxide)、胺类(amine)、硝酸(nitric acid)、磷酸(phosphoric acid)、硫酸(sulfuricacid)或有机酸(organic acid),以防止其它金属离子污染芯片表面。
综上所述,本发明利用一含有臭氧的研浆进行金属化学机械研磨,由于臭氧为非金属类的强氧化剂,因此将臭氧溶于溶液中,可轻易达到氧化的效果。此外,臭氧极易与有机物反应,而可对研磨浆料中存在的富碳颗粒亦有分解清除的作用。因此,本发明利用臭氧作为研磨液中的氧化剂,通过其优异的氧化效果,以提高金属化学机械研磨的表现,并改善研磨液的稳定性,同时避免传统氧化剂造成金属离子污染与影响研磨浆料pH值的缺点。
相较于传统氧化剂的成分,本发明利用臭氧作为CMP研磨浆料的氧化剂,具有较佳的氧化力,且可避免传统氧化剂易污染芯片表面或改变CMP浆料pH值,进而可得到较佳的研磨效果。
以上所述仅为本发明的较佳实施例,凡依本发明申请专利范围所做的均等变化与修饰,皆应属于本发明的保护范围之内。
Claims (9)
1、一种化学机械研磨浆料组成,其特征是:它包含有:氧化铝成分、预定浓度的溶解态臭氧及添加剂;该浆料组成的pH值介于1-10之间。
2、根据权利要求1所述的化学机械研磨浆料组成,其特征是:该臭氧的浓度是介于0.1-200ppm之间。
3、根据权利要求1所述的化学机械研磨浆料组成,其特征是:该添加剂包含有腐蚀抑制剂。
4、根据权利要求3所述的化学机械研磨浆料组成,其特征是:该腐蚀抑制剂为苯基叠氮。
5、一种化学机械研磨浆料组成,其特征是:它包含有:氧化铝成分及含有预定浓度溶解态臭氧的臭氧水。
6、根据权利要求5所述的化学机械研磨浆料组成,其特征是:该臭氧水的臭氧浓度是介于0.1-200ppm之间。
7、根据权利要求5所述的化学机械研磨浆料组成,其特征是:该浆料还包含有添加剂。
8、根据权利要求7所述的化学机械研磨浆料组成,其特征是:该添加剂包含有腐蚀抑制剂。
9、根据权利要求8所述的化学机械研磨浆料组成,其特征是:该腐蚀抑制剂为苯基叠氮。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/682,548 US20030052308A1 (en) | 2001-09-19 | 2001-09-19 | Slurry composition of chemical mechanical polishing |
US09/682,548 | 2001-09-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN1410501A true CN1410501A (zh) | 2003-04-16 |
Family
ID=24740174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN02131650A Pending CN1410501A (zh) | 2001-09-19 | 2002-09-12 | 一种化学机械研磨浆料组成 |
Country Status (2)
Country | Link |
---|---|
US (1) | US20030052308A1 (zh) |
CN (1) | CN1410501A (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7510974B2 (en) | 2006-05-05 | 2009-03-31 | United Microelectronics Corp. | CMP process |
CN107894359A (zh) * | 2017-12-13 | 2018-04-10 | 武汉电信器件有限公司 | 激光器芯片失效定位分析样品制备方法及中间件 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050136670A1 (en) * | 2003-12-19 | 2005-06-23 | Ameen Joseph G. | Compositions and methods for controlled polishing of copper |
US7435712B2 (en) * | 2004-02-12 | 2008-10-14 | Air Liquide America, L.P. | Alkaline chemistry for post-CMP cleaning |
US8192644B2 (en) | 2009-10-16 | 2012-06-05 | Fujifilm Planar Solutions, LLC | Highly dilutable polishing concentrates and slurries |
US11658065B2 (en) * | 2020-06-15 | 2023-05-23 | Taiwan Semiconductor Manufacturing Company Ltd. | Chemical mechanical polishing slurry composition, method for chemical mechanical polishing and method for forming connecting structure |
-
2001
- 2001-09-19 US US09/682,548 patent/US20030052308A1/en not_active Abandoned
-
2002
- 2002-09-12 CN CN02131650A patent/CN1410501A/zh active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7510974B2 (en) | 2006-05-05 | 2009-03-31 | United Microelectronics Corp. | CMP process |
CN107894359A (zh) * | 2017-12-13 | 2018-04-10 | 武汉电信器件有限公司 | 激光器芯片失效定位分析样品制备方法及中间件 |
Also Published As
Publication number | Publication date |
---|---|
US20030052308A1 (en) | 2003-03-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1152046B1 (en) | Polishing composition and polishing method employing it | |
KR100302671B1 (ko) | 화학기계적연마용조성물및화학기계적연마방법 | |
US20020096659A1 (en) | Polishing composition and polishing method employing it | |
JP4261058B2 (ja) | 銅/タンタル基体に有用な化学的機械研磨スラリー | |
EP1090083B1 (en) | Chemical mechanical polishing slurry useful for copper/tantalum substrates | |
KR101005304B1 (ko) | 탄탈 배리어 제거 용액 | |
JP4681261B2 (ja) | 半導体層を研磨するための組成物 | |
KR101069472B1 (ko) | 칼코게나이드 물질의 화학 기계적 평탄화 방법 | |
US20050005525A1 (en) | Non-polymeric organic particles for chemical mechanical planarization | |
JP2002519471A5 (zh) | ||
CN1301288A (zh) | 用于铜基材的化学机械抛光浆料 | |
JP2002075927A (ja) | 研磨用組成物およびそれを用いた研磨方法 | |
JP2000160139A (ja) | 研磨用組成物およびそれを用いた研磨方法 | |
EP1851286A2 (en) | Novel polishing slurries and abrasive-free solutions having a multifunctional activator | |
CN1735671A (zh) | 用于铜膜平面化的钝化化学机械抛光组合物 | |
KR20000057476A (ko) | 기계화학적 연마 구리 기판 | |
KR20100106357A (ko) | 루테늄 및 탄탈 장벽 cmp를 위한 조성물 및 방법 | |
CN1410501A (zh) | 一种化学机械研磨浆料组成 | |
JP4637398B2 (ja) | 研磨用組成物およびそれを用いた研磨方法 | |
US20080057715A1 (en) | Cmp system utilizing halogen adduct | |
KR20030092605A (ko) | 금속 cmp용 연마 슬러리 조성물 | |
JP2002047483A (ja) | 研磨用組成物およびそれを用いた研磨方法 | |
KR100583533B1 (ko) | 구리 연마용 조성물 | |
JP2008277848A (ja) | 化学機械研磨組成物及び化学機械研磨方法 | |
JPH10279928A (ja) | 研磨速度抑制化合物 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
WD01 | Invention patent application deemed withdrawn after publication |