CN102101978A - 一种化学机械抛光液 - Google Patents
一种化学机械抛光液 Download PDFInfo
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- CN102101978A CN102101978A CN2009102013823A CN200910201382A CN102101978A CN 102101978 A CN102101978 A CN 102101978A CN 2009102013823 A CN2009102013823 A CN 2009102013823A CN 200910201382 A CN200910201382 A CN 200910201382A CN 102101978 A CN102101978 A CN 102101978A
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- acid
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- silicon
- polishing
- guanidine
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- 238000005498 polishing Methods 0.000 title claims abstract description 105
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 33
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 31
- 239000010703 silicon Substances 0.000 claims abstract description 27
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 26
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003112 inhibitor Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 3
- 239000012530 fluid Substances 0.000 claims description 53
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 46
- 229920005591 polysilicon Polymers 0.000 claims description 31
- 229960001866 silicon dioxide Drugs 0.000 claims description 30
- 239000000178 monomer Substances 0.000 claims description 22
- -1 guanidine radicals Chemical class 0.000 claims description 20
- 239000002253 acid Chemical class 0.000 claims description 19
- ZRALSGWEFCBTJO-UHFFFAOYSA-N anhydrous guanidine Natural products NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 claims description 17
- 239000000049 pigment Substances 0.000 claims description 17
- 229920000642 polymer Polymers 0.000 claims description 17
- 229920001577 copolymer Polymers 0.000 claims description 14
- 150000003839 salts Chemical class 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 14
- 239000006061 abrasive grain Substances 0.000 claims description 13
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 claims description 11
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000006116 polymerization reaction Methods 0.000 claims description 10
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 8
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 8
- 229940123208 Biguanide Drugs 0.000 claims description 8
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 150000004283 biguanides Chemical class 0.000 claims description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 5
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 claims description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 4
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 claims description 4
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- HAMNKKUPIHEESI-UHFFFAOYSA-N aminoguanidine Chemical compound NNC(N)=N HAMNKKUPIHEESI-UHFFFAOYSA-N 0.000 claims description 4
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 4
- 239000000174 gluconic acid Substances 0.000 claims description 4
- 235000012208 gluconic acid Nutrition 0.000 claims description 4
- 229910017604 nitric acid Inorganic materials 0.000 claims description 4
- 229920002554 vinyl polymer Polymers 0.000 claims description 4
- 229920001519 homopolymer Polymers 0.000 claims description 3
- OTXHZHQQWQTQMW-UHFFFAOYSA-N (diaminomethylideneamino)azanium;hydrogen carbonate Chemical compound OC([O-])=O.N[NH2+]C(N)=N OTXHZHQQWQTQMW-UHFFFAOYSA-N 0.000 claims description 2
- VAZJLPXFVQHDFB-UHFFFAOYSA-N 1-(diaminomethylidene)-2-hexylguanidine Polymers CCCCCCN=C(N)N=C(N)N VAZJLPXFVQHDFB-UHFFFAOYSA-N 0.000 claims description 2
- UBDZFAGVPPMTIT-UHFFFAOYSA-N 2-aminoguanidine;hydron;chloride Chemical compound [Cl-].NC(N)=N[NH3+] UBDZFAGVPPMTIT-UHFFFAOYSA-N 0.000 claims description 2
- BAKYASSDAXQKKY-UHFFFAOYSA-N 4-Hydroxy-3-methylbenzaldehyde Chemical compound CC1=CC(C=O)=CC=C1O BAKYASSDAXQKKY-UHFFFAOYSA-N 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 2
- KJHOZAZQWVKILO-UHFFFAOYSA-N N-(diaminomethylidene)-4-morpholinecarboximidamide Chemical compound NC(N)=NC(=N)N1CCOCC1 KJHOZAZQWVKILO-UHFFFAOYSA-N 0.000 claims description 2
- 229920002413 Polyhexanide Polymers 0.000 claims description 2
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- STIAPHVBRDNOAJ-UHFFFAOYSA-N carbamimidoylazanium;carbonate Chemical compound NC(N)=N.NC(N)=N.OC(O)=O STIAPHVBRDNOAJ-UHFFFAOYSA-N 0.000 claims description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 2
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 2
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- ZZTURJAZCMUWEP-UHFFFAOYSA-N diaminomethylideneazanium;hydrogen sulfate Chemical compound NC(N)=N.OS(O)(=O)=O ZZTURJAZCMUWEP-UHFFFAOYSA-N 0.000 claims description 2
- MJFQUUWPZOGYQT-UHFFFAOYSA-O diaminomethylideneazanium;nitrate Chemical compound NC(N)=[NH2+].[O-][N+]([O-])=O MJFQUUWPZOGYQT-UHFFFAOYSA-O 0.000 claims description 2
- DXTIKTAIYCJTII-UHFFFAOYSA-N guanidine acetate Chemical compound CC([O-])=O.NC([NH3+])=N DXTIKTAIYCJTII-UHFFFAOYSA-N 0.000 claims description 2
- 150000002357 guanidines Chemical class 0.000 claims description 2
- PJJJBBJSCAKJQF-UHFFFAOYSA-N guanidinium chloride Chemical compound [Cl-].NC(N)=[NH2+] PJJJBBJSCAKJQF-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- XZWYZXLIPXDOLR-UHFFFAOYSA-N metformin Chemical compound CN(C)C(=N)NC(N)=N XZWYZXLIPXDOLR-UHFFFAOYSA-N 0.000 claims description 2
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 claims description 2
- VLCAYQIMSMPEBW-UHFFFAOYSA-N methyl 3-hydroxy-2-methylidenebutanoate Chemical compound COC(=O)C(=C)C(C)O VLCAYQIMSMPEBW-UHFFFAOYSA-N 0.000 claims description 2
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 2
- 229960005389 moroxydine Drugs 0.000 claims description 2
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 2
- ICFJFFQQTFMIBG-UHFFFAOYSA-N phenformin Chemical compound NC(=N)NC(=N)NCCC1=CC=CC=C1 ICFJFFQQTFMIBG-UHFFFAOYSA-N 0.000 claims description 2
- 229960003243 phenformin Drugs 0.000 claims description 2
- 239000004584 polyacrylic acid Substances 0.000 claims description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 2
- NHARPDSAXCBDDR-UHFFFAOYSA-N propyl 2-methylprop-2-enoate Chemical compound CCCOC(=O)C(C)=C NHARPDSAXCBDDR-UHFFFAOYSA-N 0.000 claims description 2
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 claims description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 229910052814 silicon oxide Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 238000007517 polishing process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000002002 slurry Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 2
- 150000001449 anionic compounds Chemical class 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical group O=[Al]O[Al]=O TWNQGVIAIRXVLR-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
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
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Classifications
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- 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
-
- 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
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30625—With simultaneous mechanical treatment, e.g. mechanico-chemical polishing
-
- 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)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Abstract
本发明涉及一种对硅进行化学机械抛光的抛光液。该抛光液中含有水,研磨颗粒、至少一种硅的增速剂和至少一种硅的抑制剂。本发明的抛光液通过调节硅的增速剂和抑制剂的量,可以调节硅与二氧化硅的选择比,提高平坦化效率。
Description
技术领域
本发明涉及一种化学机械抛光液,尤其涉及一种用于抛光多晶硅的化学机械抛光液。
背景技术
在集成电路制造中,互连技术的标准在提高,一层上面又沉积一层,使得在衬底表面形成了不规则的形貌。现有技术中使用的一种平坦化方法就是化学机械抛光(CMP),CMP工艺就是使用一种含磨料的混合物和抛光垫去抛光一硅片表面。在典型的化学机械抛光方法中,将衬底直接与旋转抛光垫接触,用一载重物在衬底背面施加压力。在抛光期间,垫片和操作台旋转,同时在衬底背面保持向下的力,将磨料和化学活性溶液(通常称为抛光液或抛光浆料)涂于垫片上,该抛光液与正在抛光的薄膜发生化学反应开始进行抛光过程。
在多晶硅的抛光过程中,通常会存在如下两个问题:1.因为多晶硅/二氧化硅的抛光速率选择比过高,使得最后抛光过程停止在二氧化硅层上时,难免会有多晶硅的碟形凹损。如图1所示,图中a、b分别为抛光前和抛光后的结构。且该问题会随着二氧化硅之间的沟槽宽度的增加而加重。这会对器件的性能造成严重影响。2.浅沟道隔离(STI)化学机械研磨过程中,二氧化硅表面形成碟形凹损,造成后续步骤覆盖多晶硅层后的抛光过程中,二氧化硅碟形凹损中残留多晶硅。如图2所示,图中a、b分别为抛光前和抛光后的结构。这同样会对器件的性能造成严重影响。
因此,解决多晶硅抛光过程中表面碟形凹损缺陷、及去除残留了多晶硅的二氧化硅碟形凹损的问题至关重要。US2003/0153189A1公开了一种用于多晶硅抛光的化学机械抛光液及方法,该抛光液包括一种聚合物表面活性剂和一种选自氧化铝和氧化铈的研磨颗粒,该聚合物表面活性剂为聚羧酸酯表面活性剂,用该浆料可以使多晶硅表面大块区域的抛光速率大大高于沟槽内的抛光速率,从而减少凹陷。US2003/0216003A1和US2004/0163324A1公开了一种制造Flash的方法。其中包括一种抛光多晶硅的抛光液,该抛光液中包含至少一种含有-N(OH),-NH(OH),-NH2(OH)基团的化合物,使用该浆料的多晶硅与二氧化硅的抛光选择比大于50。US2004/0123528A1公开了一种包含研磨颗粒和阴离子化合物的酸性抛光液,该阴离子化合物能降低保护层薄膜的去除速率,提高多晶硅与保护层薄膜的去除速率选择比。US2005/0130428A1和CN 1637102A公开了一种用于多晶硅化学机械抛光的浆料,该浆料成分包括一种或多种在多晶硅层上形成钝化层的非离子表面活性剂及一种能形成第二钝化层来能减小氮化硅或氧化硅除去速率的第二表面活性剂。专利文献US6191039揭示了一种化学机械抛光方法,可以降低化学抛光的时间和成本,且有很好的平坦化效果。以上技术虽然在一定程度上达到了一定的平坦化效果,缩短了抛光时间和成本,但是或者是分两步操作,或者只是抑制了多晶硅的抛光速率,不利于二氧化硅蝶形凹陷中多晶硅的去除,且操作复杂,抛光效果有限。
附图说明
图1为常规多晶硅抛光过程中,抛光前(a)和抛光后(b)的晶片结构图。
图2为浅沟道隔离(STI)化学机械研磨过程中造成的二氧化硅表面碟形凹损,在多晶硅抛光过程前(a)后(b)的示意图。
图3为应用本发明的新用途在抛光后可获得的晶片结构图。
发明内容
本发明的目的是为了解决上述多晶硅/二氧化硅选择比过高,二氧化硅蝶形凹陷中残留多晶硅清除较难的问题,而提供一种用于抛光多晶硅的具有合适的多晶硅/二氧化硅选择比的化学机械抛光液。
本发明的抛光液,含有研磨颗粒、至少一种硅的增速剂、至少一种硅的抑制剂和水。
所述的含有胍基的化合物为单胍、双胍、聚胍类化合物及其酸加成盐。
所述的单胍类化合物及其酸加成盐较佳的为胍、碳酸胍、乙酸胍、磷酸氢二胍、盐酸胍、硝酸胍、硫酸胍、氨基胍、氨基胍碳酸氢盐、氨基胍磺酸盐、氨基胍硝酸盐或氨基胍盐酸。
所述的双胍类化合物或其酸加成盐较佳的为双胍、二甲双胍、苯乙双胍、1,1’-己基双[5-(对氯苯基)双胍、吗啉胍、上述化合物的酸加成盐或6-脒基-2-萘基4胍基苯甲酸酯甲基磺酸盐;所述的酸较佳的为盐酸、磷酸、硝酸、醋酸、葡萄糖酸或磺酸。
所述的聚胍或其酸加成盐较佳的为聚六亚甲基胍、聚六亚甲基双胍、聚(六亚甲基双氰基胍-六亚甲基二胺)或其酸加成盐。所述的酸较佳的为盐酸、磷酸、硝酸、醋酸、葡萄糖酸或磺酸。所述的聚胍类化合物或其酸加成盐的聚合度较佳的为2~100。
所述硅的增速剂在溶液中的含量较佳为重量百分比0.0001~10wt%,更佳为重量百分比0.001~3wt%。
本发明中,所述硅的抑制剂为含颜料亲和基团的星型聚合物。
本发明中,所述的颜料亲和基团是指含有氧、氮和硫中的一种或多种元素的基团,较佳的为羟基、氨基和羧基中的一种或多种;所述的星型聚合物是指以分子中一个对称中心为中心,以放射形式联接三条或三条以上分子链的聚合物。所述的含颜料亲和基团的星型聚合物中所含的颜料亲和基团的种类可为一种或多种。
所述的含颜料亲和基团的星型聚合物可为均聚物或共聚物。形成该聚合物的聚合单体较佳的包括下列中的一种或多种:丙烯酸类单体、丙烯酸酯类单体、丙烯酰胺类单体和环氧乙烷。其中,所述的丙烯酸类单体较佳的为丙烯酸和/或甲基丙烯酸;所述的丙烯酸酯类单体较佳的为丙烯酸甲酯、甲基丙烯酸甲酯、丙烯酸乙酯、甲基丙烯酸乙酯、丙烯酸丙酯、甲基丙烯酸丙酯、丙烯酸丁酯、甲基丙烯酸丁酯、丙烯酸羟乙酯和甲基丙烯酸羟乙酯中的一种或多种;所述的丙烯酰胺类单体较佳的为丙烯酰胺和/或甲基丙烯酰胺。
较佳的,形成上述含颜料亲和基团的星型聚合物中的单体还可以含有其他的聚合单体,如其他乙烯基类单体,优选乙烯、丙烯、苯乙烯和对甲基苯乙烯。本发明中,所述的乙烯基单体是指含乙烯基单元的聚合单体。
本发明中,优选的含颜料亲和基团的星型聚合物为聚丙烯酸星型均聚物,苯乙烯与丙烯酸羟乙酯的二元星型共聚物,对甲基苯乙烯与环氧乙烷的二元星型共聚物,苯乙烯与环氧乙烷的二元星型共聚物,甲基丙烯酸甲酯与环氧乙烷的二元星型共聚物,丙烯酸甲酯与丙烯酸羟乙酯的二元星型共聚物,丙烯酸与丙烯酸羟乙酯的二元星型共聚物,以及丙烯酸、丙烯酸丁酯和丙烯酰胺的三元星型共聚物中的一种或多种。
本发明中,所述的含颜料亲和基团的星型聚合物的数均分子量较佳的为800-50000,更佳的为800-10000。所述的含颜料亲和基团的星型聚合物含量较佳的为质量百分比0.0005~3wt%,更佳的为0.001~1wt%;
本发明中,所述研磨颗粒为本领域常用研磨颗粒为二氧化硅、三氧化二铝、掺杂铝的二氧化硅、覆盖铝的二氧化硅、二氧化铈、二氧化钛和高分子研磨颗粒中的一种或多种。
所述的研磨颗粒的含量为重量百分比0.1~30wt%。
所述的研磨颗粒的粒径较佳为20~150nm,更佳为30~120nm。
本发明的抛光液的pH值较佳的为7~12。
本发明的抛光液中还可以含有H2SO4、HNO3等常用的酸性pH调节剂,粘度调节剂和/或消泡剂等,通过它们来控制抛光液的pH和粘度等特性。
本发明的抛光液由上述成分简单混合均匀即得。
本发明的抛光液可以浓缩制备,使用时加入去离子水混合均匀即可。
本发明的积极进步效果在于:本发明的抛光液可以在碱性条件下较好地抛光单晶硅和多晶硅薄膜。其中,硅抑制剂可显著降低多晶硅的去除速率,而不降低二氧化硅的去除速率,从而显著降低多晶硅与二氧化硅的选择比;硅增速剂可以溶解多晶硅,将抛光残余物带走,避免重新吸附在晶片或抛光垫上。通过调节硅增速剂和硅抑制剂的量,即可获得具有合适多晶硅/二氧化硅选择比的抛光液。此抛光液与现有技术相比,更好的解决了现有多晶硅抛光过程中二氧化硅沟道中多晶硅碟形凹陷的发生和二氧化硅碟形凹陷中的多晶硅残留的问题。可通过一步抛光实现高平坦化度,无多晶硅残留,抛光后可获得如图3所示的晶片结构。本发明的新用途还具有工艺窗口宽的特点,可使生产率大大提高,生产成本大大降低。同时胍类化合物还具有调节pH的作用,使得本发明的抛光液无需添加常规碱性pH调节剂(KOH等无机碱和/或氨水等有机胺等),大大减少了金属离子污染和环境污染。
具体实施方式
下面通过实施例的方式进一步说明本发明,并不因此将本发明限制在所述的实施例范围之中。
实施例1多晶硅的化学机械抛光液
表1给出了本发明的多晶硅化学机械抛光液1~21的配方,按表中所给各成分及其含量混合均匀即可得各实施例的抛光液,水为余量。
表1多晶硅的化学机械抛光液1~21
效果实施例1
表2给出了对比抛光液1~2和抛光液22~27的配方,按表中所给各成分及其含量混合均匀即可得各实施例的抛光液,水为余量。
将上述各抛光液用于抛光多晶硅和二氧化硅和带图案的多晶硅晶片,抛光的工艺参数为:下压力3psi,抛光盘(直径14英寸)的转速70rpm,抛光头转速80rpm,抛光浆料流速200ml/min,抛光垫为politex,抛光机为LogitechLP50。抛光效果见表3。
表2对比抛光液1~2和抛光液22~27的组成配方
表2对比抛光液1~2和抛光液22~27的抛光效果
抛光液 | 多晶硅去除速率(A/min) | HDP二氧化硅去除速率(A/min) | 多晶硅/二氧化硅选择比 | 二氧化硅蝶形凹陷中多晶硅残留情况 |
对比1 | 2300 | 146 | 15.75 | / |
对比2 | 210 | 129 | 1.63 | 有 |
22 | 755 | 133 | 5.68 | 无 |
23 | 854 | 140 | 6.10 | 无 |
24 | 980 | 135 | 7.26 | 无 |
25 | 972 | 148 | 6.57 | 无 |
26 | 1338 | 161 | 8.31 | 无 |
27 | 866 | 144 | 6.01 | 无 |
由表3数据可见,与对比抛光液1相比,本发明的抛光液22~27均具有较低的多晶硅的去除速率,而二氧化硅的去除速率基本不变,从而降低了多晶硅与二氧化硅的选择比,提高了平坦化效率。
由表3中对比抛光液2和抛光液22~27的数据可见,在其他成分及其含量均相同的情况下,加入了硅增速剂后,多晶硅与二氧化硅的选择比会随之略微上调。但其对抛光速率的影响程度远小于硅抑制剂。因此,可以通过调节两种化合物的含量来调节抛光液的多晶硅/二氧化硅选择比。与对比抛光液2相比,本发明的抛光液中加入了硅增速剂,使得本发明的抛光液不过度抑制多晶硅的去除速率,有助于清除二氧化硅蝶形凹陷中的多晶硅残留。
本发明中所提及的化合物均市售可得。
Claims (20)
1.一种抛光硅的化学机械抛光液,包含:水、研磨颗粒、至少一种硅的增速剂和至少一种硅的抑制剂,其特征在于,所述硅的抑制剂为含颜料亲和基团的星型聚合物。
3.如权利要求2所述抛光液,其特征在于,所述的含有胍基的化合物为单胍、双胍、聚胍类化合物及其酸加成盐。
4.如权利要求3所述抛光液,其特征在于,所述的单胍类化合物及其酸加成盐为胍、碳酸胍、乙酸胍、磷酸氢二胍、盐酸胍、硝酸胍、硫酸胍、氨基胍、氨基胍碳酸氢盐、氨基胍磺酸盐、氨基胍硝酸盐和氨基胍盐酸中的一种或多种。
5.如权利要求3所述抛光液,其特征在于,所述的双胍类化合物或其酸加成盐为双胍、二甲双胍、苯乙双胍、1,1’-己基双[5-(对氯苯基)双胍、吗啉胍、上述化合物的酸加成盐或6-脒基-2-萘基4胍基苯甲酸酯甲基磺酸盐;所述的酸为盐酸、磷酸、硝酸、醋酸、葡萄糖酸和磺酸中的一种或多种。
6.如权利要求3所述抛光液,其特征在于,所述的聚胍或其酸加成盐为聚六亚甲基胍、聚六亚甲基双胍、聚(六亚甲基双氰基胍-六亚甲基二胺)或其酸加成盐。所述的酸为盐酸、磷酸、硝酸、醋酸、葡萄糖酸和磺酸中的一种或多种。所述的聚胍类化合物或其酸加成盐的聚合度较佳的为2~100。
7.如权利要求1所述抛光液,其特征在于,所述硅的增速剂在溶液中的含量为重量百分比0.0001~10wt%.
8.如权利要求1所述抛光液,其特征在于:所述的颜料亲和基团为羟基、氨基和羧基中的一种或多种。
9.如权利要求8所述抛光液,其特征在于:形成所述的含颜料亲和基团的星型聚合物的聚合单体包括下列中的一种或多种:丙烯酸类单体、丙烯酸酯类单体、丙烯酰胺类单体和环氧乙烷。
10.如权利要求9所述抛光液,其特征在于:所述的丙烯酸类单体为丙烯酸和/或甲基丙烯酸;所述的丙烯酸酯类单体为丙烯酸甲酯、甲基丙烯酸甲酯、丙烯酸乙酯、甲基丙烯酸乙酯、丙烯酸丙酯、甲基丙烯酸丙酯、丙烯酸丁酯、甲基丙烯酸丁酯、丙烯酸羟乙酯和甲基丙烯酸羟乙酯中的一种或多种;所述的丙烯酰胺类单体为丙烯酰胺和/或甲基丙烯酰胺。
11.如权利要求9所述抛光液,其特征在于:形成所述的含颜料亲和基团的星型聚合物中的单体还包括其他乙烯基类单体。
12.如权利要求11所述抛光液,其特征在于:所述的其他乙烯基类单体为乙烯、丙烯、苯乙烯和对甲基苯乙烯。
13.如权利要求1所述抛光液,其特征在于:所述的含颜料亲和基团的星型聚合物为聚丙烯酸星型均聚物,苯乙烯与丙烯酸羟乙酯的二元星型共聚物,对甲基苯乙烯与环氧乙烷的二元星型共聚物,苯乙烯与环氧乙烷的二元星型共聚物,甲基丙烯酸甲酯与环氧乙烷的二元星型共聚物,丙烯酸甲酯与丙烯酸羟乙酯的二元星型共聚物,丙烯酸与丙烯酸羟乙酯的二元星型共聚物,以及丙烯酸、丙烯酸丁酯和丙烯酰胺的三元星型共聚物中的一种或多种。
14.如权利要求1所述抛光液,其特征在于:所述的含颜料亲和基团的星型聚合物的数均分子量为800-50000。
15.如权利要求1所述抛光液,其特征在于:所述的含颜料亲和基团的星型聚合物的含量为质量百分比0.0005~3%。
16.如权利要求15所述抛光液,其特征在于:所述的含颜料亲和基团的星型聚合物的含量为质量百分比0.001~1%。
17.如权利要求1所述抛光液,其特征在于,所述研磨颗粒为二氧化硅、三氧化二铝、掺杂铝的二氧化硅、覆盖铝的二氧化硅、二氧化铈、二氧化钛和高分子研磨颗粒中的一种或多种。
18.如权利要求1所述抛光液,其特征在于,所述的研磨颗粒的含量为重量百分比0.1wt.%~30wt.%。
19.如权利要求1所述抛光液,其特征在于:所述的研磨颗粒的粒径较佳为20~150nm,更佳为30~120nm。
20.如权利要求1~19任一项所述抛光液,其特征在于,所述抛光液用于涉及单晶硅和多晶硅的抛光。
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---|---|---|---|---|
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CN115651543A (zh) * | 2022-09-06 | 2023-01-31 | 苏州博来纳润电子材料有限公司 | 一种硅片粗抛光液组合物及其应用 |
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US20050104048A1 (en) * | 2003-11-13 | 2005-05-19 | Thomas Terence M. | Compositions and methods for polishing copper |
US20050136670A1 (en) * | 2003-12-19 | 2005-06-23 | Ameen Joseph G. | Compositions and methods for controlled polishing of copper |
CN101280158A (zh) * | 2007-04-06 | 2008-10-08 | 安集微电子(上海)有限公司 | 多晶硅化学机械抛光液 |
CN101235255B (zh) * | 2008-03-07 | 2011-08-24 | 大连理工大学 | 一种化学机械抛光半导体晶片用的抛光液 |
KR101095615B1 (ko) * | 2008-05-13 | 2011-12-19 | 주식회사 엘지화학 | Cmp 슬러리 |
-
2009
- 2009-12-18 CN CN200910201382.3A patent/CN102101978B/zh not_active Expired - Fee Related
-
2010
- 2010-12-17 WO PCT/CN2010/002062 patent/WO2011072491A1/zh active Application Filing
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014141667A (ja) * | 2012-12-27 | 2014-08-07 | Sanyo Chem Ind Ltd | 電子材料用研磨液 |
CN115651543A (zh) * | 2022-09-06 | 2023-01-31 | 苏州博来纳润电子材料有限公司 | 一种硅片粗抛光液组合物及其应用 |
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