WO2008032680A1 - Agent de polissage pour dispositif à semi-conducteur en circuit intégré, procédé de polissage, et procédé de fabrication du dispositif à semi-conducteur en circuit intégré - Google Patents
Agent de polissage pour dispositif à semi-conducteur en circuit intégré, procédé de polissage, et procédé de fabrication du dispositif à semi-conducteur en circuit intégré Download PDFInfo
- Publication number
- WO2008032680A1 WO2008032680A1 PCT/JP2007/067601 JP2007067601W WO2008032680A1 WO 2008032680 A1 WO2008032680 A1 WO 2008032680A1 JP 2007067601 W JP2007067601 W JP 2007067601W WO 2008032680 A1 WO2008032680 A1 WO 2008032680A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polishing
- abrasive
- polished
- integrated circuit
- water
- Prior art date
Links
- 238000005498 polishing Methods 0.000 title claims abstract description 178
- 239000004065 semiconductor Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000005380 borophosphosilicate glass Substances 0.000 claims abstract description 60
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229920000768 polyamine Polymers 0.000 claims abstract description 44
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- 229910000420 cerium oxide Inorganic materials 0.000 claims abstract description 23
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 22
- 150000007514 bases Chemical class 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 15
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 6
- MIJDSYMOBYNHOT-UHFFFAOYSA-N 2-(ethylamino)ethanol Chemical compound CCNCCO MIJDSYMOBYNHOT-UHFFFAOYSA-N 0.000 claims abstract description 5
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 78
- 239000000377 silicon dioxide Substances 0.000 claims description 39
- 235000012239 silicon dioxide Nutrition 0.000 claims description 38
- -1 nitride nitride Chemical class 0.000 claims description 27
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 20
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 20
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 17
- 229920000570 polyether Polymers 0.000 claims description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 150000004767 nitrides Chemical class 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 67
- 239000000203 mixture Substances 0.000 description 33
- 239000000654 additive Substances 0.000 description 28
- 239000007788 liquid Substances 0.000 description 26
- 230000000996 additive effect Effects 0.000 description 25
- 239000002270 dispersing agent Substances 0.000 description 18
- 150000004985 diamines Chemical class 0.000 description 16
- 150000001875 compounds Chemical class 0.000 description 15
- 239000006061 abrasive grain Substances 0.000 description 13
- 125000003277 amino group Chemical group 0.000 description 13
- 229920001451 polypropylene glycol Polymers 0.000 description 13
- 239000006185 dispersion Substances 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 11
- 238000002156 mixing Methods 0.000 description 11
- 239000000758 substrate Substances 0.000 description 10
- 125000004432 carbon atom Chemical group C* 0.000 description 9
- 238000011156 evaluation Methods 0.000 description 9
- 229920001281 polyalkylene Polymers 0.000 description 9
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 229920000058 polyacrylate Polymers 0.000 description 8
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 7
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- 229910021641 deionized water Inorganic materials 0.000 description 4
- 239000004584 polyacrylic acid Substances 0.000 description 4
- 229920005862 polyol Polymers 0.000 description 4
- 150000003077 polyols Chemical group 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 125000004430 oxygen atom Chemical group O* 0.000 description 3
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 150000005846 sugar alcohols Polymers 0.000 description 3
- 239000003082 abrasive agent Substances 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 125000004103 aminoalkyl group Chemical group 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 239000005388 borosilicate glass Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000002955 isolation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 125000005702 oxyalkylene group Chemical group 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 125000003258 trimethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])[*:1] 0.000 description 2
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 2
- 229920003169 water-soluble polymer Polymers 0.000 description 2
- LCZVSXRMYJUNFX-UHFFFAOYSA-N 2-[2-(2-hydroxypropoxy)propoxy]propan-1-ol Chemical compound CC(O)COC(C)COC(C)CO LCZVSXRMYJUNFX-UHFFFAOYSA-N 0.000 description 1
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 description 1
- JCEZOHLWDIONSP-UHFFFAOYSA-N 3-[2-[2-(3-aminopropoxy)ethoxy]ethoxy]propan-1-amine Chemical compound NCCCOCCOCCOCCCN JCEZOHLWDIONSP-UHFFFAOYSA-N 0.000 description 1
- 125000004042 4-aminobutyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])N([H])[H] 0.000 description 1
- 229920001661 Chitosan Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- QVHMSMOUDQXMRS-UHFFFAOYSA-N PPG n4 Chemical compound CC(O)COC(C)COC(C)COC(C)CO QVHMSMOUDQXMRS-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 108010039918 Polylysine Proteins 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- GHLITDDQOMIBFS-UHFFFAOYSA-H cerium(3+);tricarbonate Chemical compound [Ce+3].[Ce+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O GHLITDDQOMIBFS-UHFFFAOYSA-H 0.000 description 1
- LQCIDLXXSFUYSA-UHFFFAOYSA-N cerium(4+);tetranitrate Chemical compound [Ce+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O LQCIDLXXSFUYSA-UHFFFAOYSA-N 0.000 description 1
- UNJPQTDTZAKTFK-UHFFFAOYSA-K cerium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Ce+3] UNJPQTDTZAKTFK-UHFFFAOYSA-K 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- AXEYWFGSQDLHDX-UHFFFAOYSA-N hexane-1,3,6-triamine Chemical compound NCCCC(N)CCN AXEYWFGSQDLHDX-UHFFFAOYSA-N 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
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- 239000011229 interlayer Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- LSHROXHEILXKHM-UHFFFAOYSA-N n'-[2-[2-[2-(2-aminoethylamino)ethylamino]ethylamino]ethyl]ethane-1,2-diamine Chemical compound NCCNCCNCCNCCNCCN LSHROXHEILXKHM-UHFFFAOYSA-N 0.000 description 1
- IMENJLNZKOMSMC-UHFFFAOYSA-N n'-[2-[2-[2-[2-[2-(2-aminoethylamino)ethylamino]ethylamino]ethylamino]ethylamino]ethyl]ethane-1,2-diamine Chemical compound NCCNCCNCCNCCNCCNCCNCCN IMENJLNZKOMSMC-UHFFFAOYSA-N 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 125000006353 oxyethylene group Chemical group 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 229920000083 poly(allylamine) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000656 polylysine Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
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- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical group CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 1
- JWHOQZUREKYPBY-UHFFFAOYSA-N rubonic acid Natural products CC1(C)CCC2(CCC3(C)C(=CCC4C5(C)CCC(=O)C(C)(C)C5CC(=O)C34C)C2C1)C(=O)O JWHOQZUREKYPBY-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 125000001302 tertiary amino group Chemical group 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 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
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—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
- H01L21/3105—After-treatment
- H01L21/31051—Planarisation of the insulating layers
- H01L21/31053—Planarisation of the insulating layers involving a dielectric removal step
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/04—Lapping machines or devices; Accessories designed for working plane surfaces
- B24B37/042—Lapping machines or devices; Accessories designed for working plane surfaces operating processes therefor
- B24B37/044—Lapping machines or devices; Accessories designed for working plane surfaces operating processes therefor characterised by the composition of the lapping agent
-
- 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
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
Definitions
- Polishing agent for semiconductor integrated circuit device polishing method, and method for manufacturing semiconductor integrated circuit device
- the present invention relates to a polishing technique used in a manufacturing process of a semiconductor integrated circuit device. More specifically, an abrasive suitable for planarizing a surface to be polished including a borosilicate glass material layer (hereinafter also referred to as a BP SG layer) used in a semiconductor integrated circuit device, and a manufacturing process of the semiconductor integrated circuit device Background Art on Polishing Technology for Polished Surfaces Including BPSG Layer Used
- CMP is an indispensable technology to prevent problems caused by force and bumps. Specifically, CMP consists of planarization of inter-level dielectrics (ILD film), Shallow Trench Isolation (STI), tungsten plug formation, copper and low dielectric constant film. Used in the multilayer wiring formation process. Also, recently, the reflow method by heat treatment has been used in the past!
- BPSG Pre-Metal Dielectrics
- CMP CMP is used to planarize the surface to be polished including the BPSG layer.
- a stopper layer is provided below the BPSG layer to be polished.
- Form a silicon dioxide film or a silicon nitride film and set the ratio of the polishing rate of the BPSG layer to the polishing speed of the silicon dioxide film or the nitride nitride film (hereinafter referred to as (A polishing rate) / (B polishing rate)).
- a polishing rate the polishing rate of the BPSG layer to the polishing speed of the silicon dioxide film or the nitride nitride film
- Patent Document 1 Japanese Patent Laid-Open No. 11-12561
- Patent Document 2 Japanese Patent Laid-Open No. 2001-35818
- the present invention provides a chemical mechanical polishing abrasive for solving the above-described problems and polishing a surface to be polished in the manufacture of a semiconductor integrated circuit device, wherein the surface to be polished has a BPSG layer. It aims at providing the abrasive
- the present invention provides the following features.
- a chemical mechanical polishing abrasive for polishing a surface to be polished in the manufacture of a semiconductor integrated circuit device, the abrasive comprising cerium oxide particles and A water-soluble polyamine, one or more basic compounds selected from the group consisting of monoethanolamine, ethylethanolamine, jetanolamine, and ammonia, and water, and the abrasive has a pH of 10 In the range of 13 to 13, an abrasive is provided in which the basic compound is contained in an amount exceeding 0.01 mass% with respect to the total mass of the abrasive.
- the abrasive according to aspect 1 wherein the water-soluble polyamine force is a water-soluble polyether polyamine having a weight average molecular weight in the range of 100 to 2,000.
- the water-soluble polyamine is contained in a range of 0.00;! To 20% by mass with respect to the total mass of the abrasive.
- the abrasive described Provided.
- the basic compound is contained in a range of 0.01-2.0% by mass with respect to the total mass of the abrasive.
- polishing agent in any one is provided.
- the cerium oxide particles are contained in a range of 0.;! To 5.0% by mass with respect to the total mass of the abrasive. 4.
- the abrasive according to any one of 4 is provided.
- the polishing agent is supplied to the polishing pad, the surface to be polished of the semiconductor integrated circuit device and the polishing pad are brought into contact with each other, and polishing is performed by relative motion between the two.
- a polishing method for a polished surface wherein the surface to be polished includes a surface to be polished of a borosilicate glass material layer, and is used as the polishing agent; a polishing method using the polishing agent according to any one of! To 5 Is provided.
- the semiconductor integrated circuit device has a silicon dioxide film or a silicon nitride film immediately below the borophosphosilicate glass material layer. Provided.
- the semiconductor integrated circuit device has a silicon dioxide film immediately below the borophosphosilicate glass material layer, and the silicon nitride film directly below the silicon dioxide film.
- a ninth aspect of the present invention there is provided a method for manufacturing a semiconductor integrated circuit device, comprising a step of polishing a surface to be polished by the polishing method according to any one of aspects 6 to 8.
- the invention's effect is provided.
- FIG. 1 In the planarization process of the surface to be polished including the BPSG layer, the polishing agent of the present invention is used to conduct a semiconductor.
- FIG. 2 is a diagram showing an example of a polishing apparatus applicable to the polishing method of the present invention.
- the abrasive according to the present invention is a chemical mechanical polishing abrasive for polishing a surface to be polished of a semiconductor integrated circuit device (hereinafter simply referred to as “semiconductor device”).
- semiconductor device One type selected from the group consisting of cerium oxide particles, water-soluble polyamine, monoethanolamine, ethylethanolamine, diethanolamine, and ammonia. It contains the above basic compound and water, and the pH of the abrasive is 10 In the range of 13 or more, the basic compound is contained in an amount exceeding 0.01 mass% with respect to the total mass of the abrasive. A dispersant may coexist.
- the abrasive according to the present invention is used in a semiconductor device manufacturing process when the polished surface of the semiconductor device includes the polished surface of the BPSG layer, the polishing rate of the BPSG layer and the material other than the BPSG layer Since the control of the polishing rate ratio with the polishing rate is easy, it is possible to polish the polished surface of the BPSG layer and easily form a flat polished surface when a layer made of another material is exposed. become.
- Two or more BPSG layers may be included in one semiconductor device.
- the “surface to be polished” means an intermediate stage surface that appears in the process of manufacturing a semiconductor device.
- the abrasive according to the present invention is useful when the semiconductor device has a silicon dioxide film or a silicon nitride film immediately below the BPSG layer. Such a configuration is often employed when a silicon dioxide film or a silicon nitride film is used as a stopper film.
- the abrasive according to the present invention is also useful when the semiconductor device has silicon dioxide directly under the BPSG layer and has a silicon nitride film directly under the silicon dioxide film.
- Such a configuration is often employed when a silicon nitride film is used as a stopper film and a silicon dioxide film and a BPSG layer are formed thereon.
- this is also useful when the semiconductor device has a silicon nitride film directly under the BPSG layer and a silicon dioxide film directly under the nitride film.
- FIGS. 1 and 4 are schematic cross-sectional views of a semiconductor device in which a silicon dioxide film 2, a BPSG layer 3, and a silicon nitride film 4 are stacked on a substrate 1.
- FIG. 1 is schematic cross-sectional views of a semiconductor device in which a silicon dioxide film 2, a BPSG layer 3, and a silicon nitride film 4 are stacked on a substrate 1.
- the polishing agent according to the present invention has a polishing rate (Vps) of the BPSG layer 3.
- Vps polishing rate
- the polishing speed ratio Vps / Vso polishing speed ratio
- the polishing agent according to the present invention uses the polishing rate (Vps of the BPSG layer 3).
- Vsn polishing rate of the nitride nitride film 4
- the polishing rate ratio Vps / Vsn must be increased.
- the present abrasive has no dispersion of abrasive grains, and thus has excellent dispersion stability and is also advantageous for polishing defects.
- cerium oxide is used as the abrasive grains in the abrasive.
- a cerium oxide abrasive is used instead of a silica abrasive.
- Such an abrasive has a high polishing action on the BPSG layer due to a chemical reaction. As a result, this abrasive exhibits a high polishing rate for the BPSG layer as well as the silicon dioxide film.
- cerium oxide abrasive grains in the present invention for example, cerium oxide abrasive grains disclosed in Patent Document 1 or Patent Document 2 can be preferably used. That is, a cerium oxide powder obtained by adding an alkali to a cerium (IV) nitrate aqueous solution to produce a cerium hydroxide gel, filtering, washing and baking can be preferably used. Further, cerium oxide abrasive grains obtained by pulverizing and firing high-purity cerium carbonate, and further pulverizing and classifying the cerium oxide abrasive can be preferably used.
- the average particle diameter (diameter) of the cerium oxide abrasive grains is from 0.01 to 0.5 mm, particularly from 0.02 to 0.3 mm, and more preferably from the viewpoint of polishing characteristics and dispersion stability.
- the cerium oxide particles according to the present invention are preferably contained in a range of 0.;! To 5.0% by mass with respect to the total mass of the abrasive. If it is less than 1% by mass, a sufficient polishing rate may not be obtained. 5. When the content exceeds 0% by mass, the viscosity of the abrasive becomes high and handling becomes difficult in many cases.
- the water-soluble polyamine in the abrasive is a water-soluble polyamine having two or more amino groups in one molecule. Any compound may be used as long as it is a sex compound.
- the water solubility may be any degree as long as it is completely dissolved in the abrasive liquid at the concentration used as the abrasive. Usually, it is soluble in pure water at 1% by mass or more, preferably 5% by mass or more.
- Particularly preferred water-soluble polyamines are water-soluble polyether polyamines and water-soluble polyalkylene polyamines.
- the molecular weight of the water-soluble polyamine is not limited as long as the molecular weight is in the range having water solubility, but the weight average molecular weight is preferably in the range of 100 to 100,000; 100 to 2000 More preferably, it is in the range. When the weight average molecular weight is less than 100, the effect is small. If it exceeds 100,000, even if it is water-soluble, it may adversely affect the physical properties such as the fluidity of the abrasive. If it exceeds 2000, the solubility in pure water often decreases.
- Particularly preferred water-soluble polyamines are water-soluble polyether polyamines and water-soluble polyalkylene polyamines having a weight average molecular weight of 100 to 2,000.
- These water-soluble polyamines are used as additives for controlling the polishing rate of the silicon dioxide film and the silicon nitride film and controlling the polishing rate of the BPSG layer. Furthermore, by adding a basic compound such as ammonia as described above, the polishing rate ratio (Vps / Vsn and Vps / Vso) of the BPSG layer to the polishing rate of the silicon nitride film (Vsn) and silicon dioxide film (Vso) is controlled. it can.
- the water-soluble polyamine particularly preferred in the present invention is one or more selected from the group consisting of a water-soluble polyether polyamine having a weight average molecular weight of 100 to 2000 and a water soluble polyalkylene polyamine having a weight average molecular weight of 100 to 2000. It is a water-soluble polyamine. From the viewpoint of high dispersion stabilizing effect on cerium oxide abrasives !, the more preferable weight average molecular weight of this water-soluble polyester polyamine is 150 to 800, and even more preferable weight. The average molecular weight is 150-400.
- the polyether polyamine means a compound having two or more amino groups and two or more etheric oxygen atoms.
- the amino group is preferably a primary amino group (—NH 2).
- the amino group has a secondary amino group (one NH) or a tertiary amino group! /, Or may! /, But the polyether polyamine in the present invention has two or more primary amino groups.
- Polyether diamine having only two primary amino groups is particularly preferred, and a compound having substantially no other amino group is preferred.
- the polyether polyamine is preferably a compound having a structure in which a hydrogen atom of a hydroxyl group of a polyhydric alcohol or polyether polyol is substituted with an aminoalkyl group.
- polyhydric alcohol a divalent to hexavalent alcohol, particularly, a divalent alcohol is preferred.
- polyether polyol a divalent to hexavalent polyoxyalkylene polyol, particularly, a polyoxyalkylene diol is preferable.
- aminoalkyl group include 2-aminoethyl group, 2-aminopropyl group, 2-amino-1 methylethyl group, 3-aminopropyl group, 2-amino-1, 1-dimethylethyl group, and 4-aminobutyl group. Is preferred.
- the polyhydric alcohol is preferably a dihydric alcohol having 2 to 8 carbon atoms, which may have an etheric oxygen atom, such as ethylene glycol, diethylene glycol, propylene glycol, and dipropylene glycol.
- Polyether polyols include polyethylene glycols such as triethylene glycol and tetraethylenedaricol (that is, polyoxyethylenediol), polypropylene glycols such as tripropylene glycol and tetrapropylene glycol (that is, polyoxypropylene diol).
- the polyalkylene polyamine means a compound in which three or more amino groups are bonded via an alkylene group.
- the terminal amino group is preferably a primary amino group, and the amino group in the molecule is preferably a secondary amino group. More preferably, it is a linear polyalkylene polyamine having a primary amino group at both molecular terminals and having one or more secondary amino groups in the molecule. There are two or more bonds between an amino group and another amino group, and an alkylene group is present in one molecule.
- These plurality of amino group-bonded portions may be the same or different from each other, and are all the same, or the two amino-group-bonded portions bonded to the primary amino groups at both ends are the same and other It is preferable that it is different from the bonding part between amino groups.
- the number of carbon atoms contained in one amino group-linked moiety is preferably 2-8, and the number of carbon atoms contained in the two amino-group bonded moieties bonded to the primary amino groups at both ends is preferably 2-8.
- the number of carbon atoms contained in the other amino group-bonded moiety is preferably 2-6.
- polyether diamine and the polyalkylene polyamine a compound having a structure represented by the following formula (1) is preferable.
- R represents an alkylene group having 2 to 8 carbon atoms
- X represents an oxygen atom or —NH—
- k represents an integer of 2 or more in the case of polyetherdiamine, and polyalkylenepolyamine In case of, it represents an integer of 1 or more.
- Plural R in one molecule may be different from each other.
- a compound having a structure represented by the following formula (2) is preferred as the polyether diamine, and a compound having a structure represented by the following formula (3) is preferred as the polyalkylene polyamine.
- R 1 is an ethylene group or propylene group
- R 2 is an alkylene group having 2 to 6 carbon atoms
- R 3 is an alkylene group having 2 to 6 carbon atoms
- R 4 is an alkylene group having 2 to 8 carbon atoms
- m is 1 More than An integer
- n represents an integer of 1 or more
- R 1 and R 2 may be the same or different.
- R 3 and R 4 may be the same or different.
- Specific polyether diamines represented by the formula (2) include, for example, polyoxypropylene diamine (a compound in which RR 2 is a propylene group and m is 1 or more), polyoxyethylene diamine (RR 2 is an ethylene group, and m is 1 or more), 4, 7, 10 trioxa-tridecane 1, 13 diamine (R 1 is an ethylene group, R 2 is a trimethylene group, m is 2).
- Specific polyalkylene polyamines represented by the formula (3) include, for example, tetraethylene pentamine (a compound in which R 3 and R 4 are ethylene groups and n is 2), pentaethylene hexamine (R 3 and R 4 are Compound with ethylene group, n is 3), heptaethyleneoctamine (R 3 , R 4 is ethylene group, compound with n is 5), N, N, 1 bis (3-aminopropyl) 1 ethylenediamine (R 3 is ethylene) Group, R 4 is a trimethylene group, n is 1 compound), N, N, monobis (2-aminoethyl) 1, 4-butanediamine (R 3 is a tetramethylene group, R 4 is an ethylene group, n is 1 Compound).
- tetraethylene pentamine a compound in which R 3 and R 4 are ethylene groups and n is 2
- pentaethylene hexamine R 3 and R 4 are Compound with ethylene group, n is 3
- the concentration of the water-soluble polyamine in the polishing agent is within the range of 0.00; 20 to 20% by mass from the viewpoint of obtaining a sufficient effect of suppressing the polishing rate. It is preferable to set appropriately considering the polymerization average molecular weight of the polyamine.
- the concentration of the water-soluble polyamine in the abrasive is more preferably in the range of 0.05 to 5% by mass.
- the water according to the present invention is not particularly limited, but pure water, ultrapure water, ion-exchanged water, and the like are preferably used from the viewpoint of influence on other agents, mixing of impurities, and influence on pH and the like. Is possible.
- the present abrasive can be used in an alkaline pH region.
- pHIO ⁇ In view of the polishing properties and dispersion stability of the abrasive, pHIO ⁇ ; 13 is preferred. If the pH is less than 10, the dispersibility may be reduced. If the pH is more than 13, there is no problem in the polishing characteristics, but the surface to be polished may be affected. May deteriorate.
- the abrasive according to the present invention contains one or more basic compounds selected from the group consisting of monoethanolamine, ethylethanolamine, diethanamine, and ammonia. Among these, ammonia is particularly preferable because the polishing rate can be easily controlled. These basic compounds include those added for other purposes, such as abrasive dispersants. Ammonia contains ammonia such as polyacrylic acid ammonium which is a dispersing agent for abrasive grains. Forms are also included.
- the polishing rate ratio of the BPSG layer to the polishing rate of the (Vsn) and silicon dioxide film (Vso), that is, the BPSG layer can be polished at high speed while keeping both Vps / Vsn and Vps / Vso at 10 or more. Become.
- the basic compound needs to be contained in an amount exceeding 0.01 mass% with respect to the total mass of the abrasive. Below that, it is insufficient to control the polishing rate.
- the basic compound is preferably contained in the range of 0.0;! To 2.0% by mass with respect to the total mass of the abrasive. If the amount is less than 0.01% by mass, the effect of controlling the polishing rate of the BPSG layer is small. If the amount exceeds 2.0% by mass, no further special effect is obtained.
- the abrasive according to the present invention may contain other components.
- a typical example is a dispersant.
- a water-soluble surfactant or a water-soluble polymer is preferable. Any of anionic property, cationic property, and nonionic property may be used.
- a polymer having a carboxylic acid group or a strong rubonic acid ammonium salt is preferred. Examples thereof include polyacrylic acid and salts thereof, for example, polyacrylic acid ammonium.
- the abrasive according to the present invention does not necessarily have to be supplied to the polishing site as a mixture of all of the constituent polishing materials.
- abrasive materials may be mixed to form an abrasive composition.
- it is divided into a liquid containing cerium oxide particles, water, and optionally a dispersing agent, and a liquid containing a water-soluble polyamine and the above basic compound, and the mixing ratio is appropriately adjusted during polishing. Also good.
- It can also be divided into a liquid containing cerium oxide particles, a dispersant, a water-soluble polyamine, and water, and a liquid containing a basic compound and water. Other division methods may be used.
- polishing agent is supplied to the polishing pad, the surface to be polished of the semiconductor device and the polishing pad are brought into contact with each other, and relative movement between the two is caused. Polish the polished surface including the polished surface of the BPSG layer.
- the polishing rate ratio between the BPSG layer and the silicon dioxide film and the BPS Since the polishing rate ratio between the G layer and the nitride nitride film can be increased, this polishing method is particularly effective when the semiconductor device force has a silicon dioxide film or a nitride nitride film directly under the BPSG layer, or under the BPSG layer.
- it can be suitably used when it has a silicon dioxide film and a nitrided silicon film directly under the silicon dioxide film.
- the present invention can also be suitably used when a silicon nitride film is provided immediately below the BPSG layer and a silicon dioxide film is provided immediately below the nitride film.
- FIG. 2 is a diagram showing an example of a polishing apparatus applicable to the polishing method of the present invention. While supplying the polishing agent 36 from the polishing agent supply pipe 35, the semiconductor device 31 is held on the polishing head 32 and brought into contact with the polishing pad 34 affixed to the surface of the polishing surface plate 33, and the polishing head 32 and the polishing surface plate. This is a method of rotating 33 to make a relative movement.
- the polishing apparatus according to the present invention is not limited to this.
- the polishing head 32 may move linearly as well as rotate.
- the polishing surface plate 33 and the polishing pad 34 may be as large as or smaller than the semiconductor device 31. In that case, it is preferable to move the polishing head 32 and the polishing surface plate 33 relative to each other so that the entire surface of the semiconductor device can be polished.
- the polishing surface plate 33 and the polishing pad 34 may not be a rotary type but may be a belt type that moves in one direction.
- the polishing conditions of the polishing apparatus are not particularly limited, but the polishing rate can be improved by applying a load to the polishing head 32 and pressing it against the polishing pad 34.
- the polishing pressure at this time is particularly preferably about 3 to 40 kPa from the viewpoint of uniformity in semiconductor devices having a polishing rate of preferably about 0.5 to 50 kPa, flatness, and prevention of polishing defects such as scratches.
- the rotation speed of the polishing surface plate and the polishing head is preferably about 50 to 500 rpm, but is not limited thereto.
- polishing pad a general nonwoven fabric, foamed polyurethane, porous resin, non-porous resin or the like can be used.
- grooves such as lattices, concentric circles, and spirals have been formed on the surface of the polishing pad in order to promote the supply of the abrasive or to collect a certain amount of abrasive! / Yo! /
- the surface to be polished is polished in the manufacture of a semiconductor device
- a high polishing rate is obtained for the BPSG layer, and the BPSG layer and other materials are obtained.
- An appropriate polishing rate ratio can be obtained with the material. Therefore, in manufacturing a semiconductor device using this polishing method, the cost can be reduced and the throughput can be improved.
- the “aggregation and precipitation time” in the examples was determined as the time required for 20 mL of an abrasive to be put into a glass test tube having a diameter of 18 mm and left to stand for 2 days, and then separated into two layers to form a supernatant.
- Polishing was performed with the following apparatus and conditions.
- Polishing machine Full automatic CMP equipment MIRRA (manufactured by APPLIED MATERIALS) Abrasive supply speed: 200ml / min
- Polishing pad 2-layer pad IC 1400 K groove
- Polishing pad conditioning MEC100—PH3. 5L (Mitsubishi Materials Corporation) Polishing surface plate rotation speed: 77rpm (common to all examples)
- Rotation speed of polishing head 73rpm (common to all examples)
- Polishing pressure 27.6 kPa (common to all cases)
- the polished objects include an 8-inch silicon wafer substrate with a BPSG layer formed by the CVD method, an 8-inch silicon wafer substrate with a nitride film formed by the CVD method, and HDP (high An 8-inch silicon wafer substrate with a silicon dioxide film formed by the density plasma CVD method was used.
- a film thickness meter UV-1280SE manufactured by KLA-Tencor was used.
- This mixture was diluted 5 times with deionized water to prepare an abrasive mixture A having an abrasive concentration of 2.0% and a dispersant concentration of 0.014%.
- the pH of the abrasive mixture A was 7.6, and the average particle size was 0.19 m.
- an amine-based water-soluble polymer having a molecular weight of 230 polyoxypropylene diamine manufactured by BASF, trade name: polyetheramine
- ammonia as a basic compound.
- the abrasive concentration was 1.0%, and the polyacrylic acid ammonium as a dispersant was mixed.
- An abrasive having a concentration of 0.007%, a polyoxypropylene diamine concentration of 1.0%, an ammonia concentration of 0.05%, and a pH of 10.9 was prepared.
- Table 1 shows the composition of the abrasive, the evaluation results of the polishing characteristics, and the like.
- Abrasive grain mixture A was prepared in the same manner as in Example 1, and the same preparation as in Additive Liquid B 1 was made! /, As in Example 1, except that the concentration of ammonia was 0.16%. Then, additive liquid B2 was prepared. By mixing additive liquid B2 and abrasive mixture A at a mass ratio of 1: 1, the abrasive concentration is 1.0%, the concentration of ammonium polyacrylate as a dispersant is 0.007%, and the additive An abrasive having a polyoxypropylene diamine concentration of 1.0%, an ammonia concentration of 0.08%, and a pH of 10.9 was prepared.
- abrasive mixture A was prepared, and in the same preparation as additive liquid B1, additive liquid B3 was prepared in the same manner as in Example 1 except that the ammonia concentration was 0.2%.
- additive liquid B2 was prepared at a mass ratio of 1: 1
- the abrasive concentration is 1.0%
- the concentration of ammonium polyacrylate as a dispersant is 0.007%
- the additive An abrasive having a polyoxypropylene diamine concentration of 1.0%, an ammonia concentration of 0.1%, and a ⁇ of 10.9 was prepared.
- Abrasive grain mixture A was prepared in the same manner as in Example 1, and in the same preparation as Additive liquid B1, monomethanolamine was used at a concentration of 0.72% instead of ammonia, and added as in Example 1.
- Agent solution B4 was prepared. By mixing this additive liquid B4 and abrasive mixture A at a mass ratio of 1: 1, the abrasive concentration is 1.0%, and the concentration of ammonium polyacrylate as a dispersant is 0.007%.
- a polishing agent having a polyoxypropylene diamine concentration of 1.0%, a monoethanolamine concentration of 0.36%, and a pH of 0 was prepared.
- An abrasive mixture A was prepared in the same manner as in Example 1, and additive liquid B5 was prepared in the same manner as in Example 1 except that in the same preparation as additive liquid B1, no ammonia was used.
- the abrasive concentration is 1.0%
- the concentration of ammonium polyacrylate as a dispersant is 0.007%
- the additive A polishing agent having a polyoxypropylenediamine concentration of 1.0% and a pH of 10.7 was prepared.
- the abrasive was evaluated in the same manner as in Example 1.
- Table 1 shows the composition of the abrasive and the evaluation results of the polishing characteristics.
- Example 6 Abrasive mixture A was prepared in the same manner as in Example 1, and in the same preparation as Additive liquid B1, potassium hydroxide was used at a concentration of 0.06% instead of ammonia.
- Agent solution B6 was prepared. By mixing this additive liquid B6 and abrasive mixture A at a mass ratio of 1: 1, the abrasive concentration is 1.0%, and the concentration of ammonium polyacrylate as a dispersant is 0.007%.
- a polishing agent having a polyoxypropylene diamine concentration of 1.0%, a hydroxide power concentration of 0.03%, and a pH of 11.4 was prepared.
- Abrasive mixture A was prepared in the same manner as in Example 1 and the same preparation as in Additive Liquid B1, except that trishydroxymethylaminomethane was used in an amount of 1-42% instead of ammonia.
- additive liquid B7 was produced.
- the abrasive concentration is 1.0% and the concentration of ammonium polyacrylate as a dispersant is 0.007%.
- An abrasive having a polyoxypropylene diamine concentration of 1.0%, a trishydroxymethylaminomethane concentration of 0.71%, and a pH of 10.8 was prepared.
- the abrasive was evaluated in the same manner as in Example 1.
- Table 1 shows the composition of the abrasive and the evaluation results of the polishing characteristics.
- abrasive mixture A was prepared as in Example 1 and ammonium sulfate was used at 1.56% instead of ammonia in the same preparation as additive liquid B1.
- Liquid B8 was prepared. By mixing this additive liquid B8 and abrasive mixture A at a mass ratio of 1: 1, the abrasive concentration is 1.0% and the concentration of ammonium polyacrylate as a dispersant is 0.007%.
- An abrasive having a polyoxypropylene diamine concentration of 1.0%, an ammonium sulfate concentration of 0.78%, and a pH of 9.2 was prepared.
- the abrasive was evaluated in the same manner as in Example 1.
- Table 1 shows the composition of the abrasive and the evaluation results of the polishing characteristics.
- each abrasive had an average particle size of 0.19 m, similar to the abrasive mixture A. That is, by mixing additive liquids B1 to B7, Aggregation did not progress. When this abrasive was allowed to stand and the dispersion stability was evaluated, the dispersion was maintained even after 2 days. This dispersion state was the same as that of the abrasive mixture A with the addition of additives! /, N! /, And the dispersibility was very good. In contrast, in Example 8 where the pH was less than 10, the agglomeration of abrasive grains immediately occurred.
- the abrasive of the present invention is suitable when a silicon dioxide film or a silicon nitride film is used as a stopper layer under the BPSG layer in the planarization process of the surface to be polished including the BPSG layer.
- the BPSG layer polishing rate can be widely controlled while the polishing rate of the silicon nitride film or silicon dioxide film is kept low.
- the present abrasive has no dispersion of abrasive grains, is excellent in dispersion stability, and is advantageous for polishing defects.
- the abrasive of the present invention is excellent in dispersion stability, has excellent planarization characteristics for polishing a surface to be polished including a BPSG layer, and has few polishing defects.
- planarization of the polished surface including the BPSG layer used for capacitors, gate electrodes and others in the formation process flattening of the interlayer insulating film involving the BPSG layer, and flattening of the insulating film for shallow trench isolation It is preferably applied.
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Description
Claims
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JP2008534332A JPWO2008032680A1 (ja) | 2006-09-11 | 2007-09-10 | 半導体集積回路装置用研磨剤、研磨方法および半導体集積回路装置の製造方法 |
EP07807011A EP2061070A4 (en) | 2006-09-11 | 2007-09-10 | POLISHING AGENT FOR AN INTEGRATED SEMICONDUCTOR ELEMENTS, POLISHING METHOD AND METHOD FOR PRODUCING AN INTEGRATED SEMICONDUCTOR EQUIPMENT |
US12/401,747 US20090176373A1 (en) | 2006-09-11 | 2009-03-11 | Polishing agent for semiconductor integrated circuit device, polishing method, and method for manufacturing semiconductor integrated circuit device |
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US12/401,747 Continuation US20090176373A1 (en) | 2006-09-11 | 2009-03-11 | Polishing agent for semiconductor integrated circuit device, polishing method, and method for manufacturing semiconductor integrated circuit device |
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EP (1) | EP2061070A4 (ja) |
JP (1) | JPWO2008032680A1 (ja) |
KR (1) | KR20090049067A (ja) |
CN (1) | CN101512733A (ja) |
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JP2016539207A (ja) * | 2013-10-10 | 2016-12-15 | キャボット マイクロエレクトロニクス コーポレイション | 基材の選択的な研磨用の湿式法セリア組成物および関連する方法 |
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CN103194148B (zh) * | 2013-04-23 | 2014-10-22 | 清华大学 | 化学机械抛光水性组合物及其用途 |
JP2018506176A (ja) * | 2014-12-16 | 2018-03-01 | ビーエーエスエフ ソシエタス・ヨーロピアBasf Se | ゲルマニウムを含む基板の高効率研磨のための化学機械研磨(cmp)組成物 |
CN113004796A (zh) * | 2019-12-19 | 2021-06-22 | 安集微电子科技(上海)股份有限公司 | 一种化学机械抛光液 |
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2007
- 2007-09-10 CN CNA2007800336171A patent/CN101512733A/zh active Pending
- 2007-09-10 EP EP07807011A patent/EP2061070A4/en not_active Withdrawn
- 2007-09-10 WO PCT/JP2007/067601 patent/WO2008032680A1/ja active Application Filing
- 2007-09-10 JP JP2008534332A patent/JPWO2008032680A1/ja not_active Withdrawn
- 2007-09-10 KR KR1020097005039A patent/KR20090049067A/ko not_active Application Discontinuation
- 2007-09-11 TW TW096133938A patent/TW200829687A/zh unknown
-
2009
- 2009-03-11 US US12/401,747 patent/US20090176373A1/en not_active Abandoned
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20160070093A (ko) * | 2013-10-10 | 2016-06-17 | 캐보트 마이크로일렉트로닉스 코포레이션 | 기판을 연마하기 위한 습식 공정 세리아 조성물, 및 이와 관련된 방법 |
JP2016538357A (ja) * | 2013-10-10 | 2016-12-08 | キャボット マイクロエレクトロニクス コーポレイション | 基材の研磨用の湿式法セリア組成物および関連する方法 |
JP2016539207A (ja) * | 2013-10-10 | 2016-12-15 | キャボット マイクロエレクトロニクス コーポレイション | 基材の選択的な研磨用の湿式法セリア組成物および関連する方法 |
KR102283152B1 (ko) | 2013-10-10 | 2021-07-30 | 씨엠씨 머티리얼즈, 인코포레이티드 | 기판을 연마하기 위한 습식 공정 세리아 조성물, 및 이와 관련된 방법 |
Also Published As
Publication number | Publication date |
---|---|
EP2061070A1 (en) | 2009-05-20 |
US20090176373A1 (en) | 2009-07-09 |
TW200829687A (en) | 2008-07-16 |
CN101512733A (zh) | 2009-08-19 |
EP2061070A4 (en) | 2010-06-02 |
JPWO2008032680A1 (ja) | 2010-01-28 |
KR20090049067A (ko) | 2009-05-15 |
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