WO2001080296A1 - Compose de polissage pour le polissage de dispositif a semiconducteur et procede de fabrication de dispositif a semiconducteur dans lesquel ledit compose est utilise - Google Patents
Compose de polissage pour le polissage de dispositif a semiconducteur et procede de fabrication de dispositif a semiconducteur dans lesquel ledit compose est utilise Download PDFInfo
- Publication number
- WO2001080296A1 WO2001080296A1 PCT/JP2001/003147 JP0103147W WO0180296A1 WO 2001080296 A1 WO2001080296 A1 WO 2001080296A1 JP 0103147 W JP0103147 W JP 0103147W WO 0180296 A1 WO0180296 A1 WO 0180296A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polishing
- acid
- abrasive
- composition
- oxide
- Prior art date
Links
- 238000005498 polishing Methods 0.000 title claims abstract description 148
- 239000004065 semiconductor Substances 0.000 title claims abstract description 58
- 150000001875 compounds Chemical class 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title claims description 26
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 46
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 46
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910000420 cerium oxide Inorganic materials 0.000 claims abstract description 38
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002738 chelating agent Substances 0.000 claims abstract description 30
- 239000010419 fine particle Substances 0.000 claims abstract description 29
- 239000002245 particle Substances 0.000 claims abstract description 27
- 238000002955 isolation Methods 0.000 claims abstract description 20
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 13
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims description 88
- 239000000758 substrate Substances 0.000 claims description 20
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 19
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 13
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 229910052776 Thorium Inorganic materials 0.000 claims description 8
- NBZBKCUXIYYUSX-UHFFFAOYSA-N iminodiacetic acid Chemical compound OC(=O)CNCC(O)=O NBZBKCUXIYYUSX-UHFFFAOYSA-N 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 8
- 239000011572 manganese Substances 0.000 claims description 8
- 229910052700 potassium Inorganic materials 0.000 claims description 8
- JYXGIOKAKDAARW-UHFFFAOYSA-N N-(2-hydroxyethyl)iminodiacetic acid Chemical compound OCCN(CC(O)=O)CC(O)=O JYXGIOKAKDAARW-UHFFFAOYSA-N 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 239000011575 calcium Substances 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- URDCARMUOSMFFI-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-(2-hydroxyethyl)amino]acetic acid Chemical compound OCCN(CC(O)=O)CCN(CC(O)=O)CC(O)=O URDCARMUOSMFFI-UHFFFAOYSA-N 0.000 claims description 6
- RNMCCPMYXUKHAZ-UHFFFAOYSA-N 2-[3,3-diamino-1,2,2-tris(carboxymethyl)cyclohexyl]acetic acid Chemical compound NC1(N)CCCC(CC(O)=O)(CC(O)=O)C1(CC(O)=O)CC(O)=O RNMCCPMYXUKHAZ-UHFFFAOYSA-N 0.000 claims description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 6
- GEYXPJBPASPPLI-UHFFFAOYSA-N manganese(iii) oxide Chemical compound O=[Mn]O[Mn]=O GEYXPJBPASPPLI-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 5
- 229920002125 Sokalan® Polymers 0.000 claims description 5
- 229910052770 Uranium Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 5
- 229960003330 pentetic acid Drugs 0.000 claims description 5
- 239000004584 polyacrylic acid Substances 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 4
- 150000004767 nitrides Chemical class 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 4
- VKZRWSNIWNFCIQ-WDSKDSINSA-N (2s)-2-[2-[[(1s)-1,2-dicarboxyethyl]amino]ethylamino]butanedioic acid Chemical compound OC(=O)C[C@@H](C(O)=O)NCCN[C@H](C(O)=O)CC(O)=O VKZRWSNIWNFCIQ-WDSKDSINSA-N 0.000 claims description 3
- VCVKIIDXVWEWSZ-YFKPBYRVSA-N (2s)-2-[bis(carboxymethyl)amino]pentanedioic acid Chemical compound OC(=O)CC[C@@H](C(O)=O)N(CC(O)=O)CC(O)=O VCVKIIDXVWEWSZ-YFKPBYRVSA-N 0.000 claims description 3
- RAEOEMDZDMCHJA-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-[2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]ethyl]amino]acetic acid Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CCN(CC(O)=O)CC(O)=O)CC(O)=O RAEOEMDZDMCHJA-UHFFFAOYSA-N 0.000 claims description 3
- DMQQXDPCRUGSQB-UHFFFAOYSA-N 2-[3-[bis(carboxymethyl)amino]propyl-(carboxymethyl)amino]acetic acid Chemical compound OC(=O)CN(CC(O)=O)CCCN(CC(O)=O)CC(O)=O DMQQXDPCRUGSQB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052582 BN Inorganic materials 0.000 claims description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 3
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 claims description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 238000005229 chemical vapour deposition Methods 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 3
- 239000000347 magnesium hydroxide Substances 0.000 claims description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 3
- 229910052596 spinel Inorganic materials 0.000 claims description 3
- 239000011029 spinel Substances 0.000 claims description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 3
- 229910001887 tin oxide Inorganic materials 0.000 claims description 3
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 2
- 239000005977 Ethylene Substances 0.000 claims description 2
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical group OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 claims description 2
- RUSUZAGBORAKPY-UHFFFAOYSA-N acetic acid;n'-[2-(2-aminoethylamino)ethyl]ethane-1,2-diamine Chemical compound CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.NCCNCCNCCN RUSUZAGBORAKPY-UHFFFAOYSA-N 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims description 2
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052863 mullite Inorganic materials 0.000 claims description 2
- 229910052845 zircon Inorganic materials 0.000 claims description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims 2
- DCXYFEDJOCDNAF-UHFFFAOYSA-N Asparagine Natural products OC(=O)C(N)CC(N)=O DCXYFEDJOCDNAF-UHFFFAOYSA-N 0.000 claims 1
- DCXYFEDJOCDNAF-REOHCLBHSA-N L-asparagine Chemical compound OC(=O)[C@@H](N)CC(N)=O DCXYFEDJOCDNAF-REOHCLBHSA-N 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 229960001230 asparagine Drugs 0.000 claims 1
- 235000009582 asparagine Nutrition 0.000 claims 1
- 239000000395 magnesium oxide Substances 0.000 claims 1
- UZVUJVFQFNHRSY-OUTKXMMCSA-J tetrasodium;(2s)-2-[bis(carboxylatomethyl)amino]pentanedioate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CC[C@@H](C([O-])=O)N(CC([O-])=O)CC([O-])=O UZVUJVFQFNHRSY-OUTKXMMCSA-J 0.000 claims 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims 1
- 239000006061 abrasive grain Substances 0.000 abstract description 10
- 239000003082 abrasive agent Substances 0.000 abstract description 7
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 13
- 238000011156 evaluation Methods 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 10
- 235000012431 wafers Nutrition 0.000 description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Substances CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 5
- 150000001412 amines Chemical class 0.000 description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 description 5
- 239000011164 primary particle Substances 0.000 description 5
- 239000004094 surface-active agent Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- DCCWEYXHEXDZQW-BYPYZUCNSA-N (2s)-2-[bis(carboxymethyl)amino]butanedioic acid Chemical compound OC(=O)C[C@@H](C(O)=O)N(CC(O)=O)CC(O)=O DCCWEYXHEXDZQW-BYPYZUCNSA-N 0.000 description 3
- QNAYBMKLOCPYGJ-REOHCLBHSA-N L-alanine Chemical compound C[C@H](N)C(O)=O QNAYBMKLOCPYGJ-REOHCLBHSA-N 0.000 description 3
- 235000004279 alanine Nutrition 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 2
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 2
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 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
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- UAMZXLIURMNTHD-UHFFFAOYSA-N dialuminum;magnesium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Mg+2].[Al+3].[Al+3] UAMZXLIURMNTHD-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 methylene phosphonic acid Chemical compound 0.000 description 2
- 150000003141 primary amines Chemical class 0.000 description 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 2
- 150000003335 secondary amines Chemical class 0.000 description 2
- 150000003512 tertiary amines Chemical class 0.000 description 2
- BDDLHHRCDSJVKV-UHFFFAOYSA-N 7028-40-2 Chemical compound CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O BDDLHHRCDSJVKV-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- RGHNJXZEOKUKBD-SQOUGZDYSA-N Gluconic acid Natural products OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 1
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- WDJHALXBUFZDSR-UHFFFAOYSA-N acetoacetic acid Chemical compound CC(=O)CC(O)=O WDJHALXBUFZDSR-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical class [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 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
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002296 dynamic light scattering Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000015227 regulation of liquid surface tension Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
- 125000004417 unsaturated alkyl group Chemical group 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
- H01L21/302—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
-
- 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
- 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
-
- 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
Definitions
- the present invention generally relates to an abrasive composition for polishing a semiconductor device and a method for manufacturing a semiconductor device using the same.
- a shallow trench isolation (Shallow Trench Isolation) method has attracted attention as a manufacturing technology corresponding to a higher density of the semiconductor device.
- This method is a technique used in place of the conventional LOCOS (Local Oxidation of Silicon) method. Specifically, a silicon nitride film is formed on a silicon substrate, and then a shallow trench (Shallow Trench) is formed. In this method, an oxide film is deposited thereon, and then planarized by a CMP technique using the silicon nitride film as a stopper.
- this method is expected to be used as a technology that can cope with high-density LSI because of its wide effective device area.
- this STI method is used for increasing the density of LSI, first, a silicon nitride film is arranged under the oxide film to be polished, and then the polishing is performed using the silicon nitride film as a stopper.
- the machining allowance can be uniformly finished without excess and deficiency, and the polishing can be finished with a predetermined machining allowance in a controlled manner.
- Japanese Patent Application Laid-Open No. 9-194832 discloses a composition containing abrasive particles such as silicon nitride, silicon carbide, and graphite. Also, Japanese Patent Application Laid-Open No. 9-198933 discloses an abrasive composition in which an acid such as gluconic acid is added to a silicon nitride powder.
- these abrasive compositions contain abrasives of high hardness, so that they are ground. Although the polishing speed is high, there are many problems such as the resulting damage to the polished surface, which in turn leads to reduced LSI performance.
- polishing index of the oxide film (often a silicon dioxide film is used) for the silicon nitride film serving as the stopper film (usually, the polishing speed of the oxide film is divided by the polishing speed of the silicon nitride film.
- polishing speed of the oxide film is divided by the polishing speed of the silicon nitride film.
- the present inventors in view of such problems, the previously W099 / forty-three thousand seven hundred sixty-one JP, water, cerium oxide and - C00H, or atoms can form salts by replacing the -C00M x groups (M iH atoms functional group) includes a -S0 3 H, -S0 3 M Y group (Micromax gamma water-soluble organic compound having at least one functional group of atoms or functional groups) can form salts by replacing the H atom
- the present invention also discloses a semiconductor device polishing composition and, if necessary, a polishing composition further containing a chelating agent, and a method for forming the polishing composition by a shallow wrench isolation method using the polishing composition. Suggested.
- U.S. Pat. No. 5,738,800 discloses a composition containing water, abrasive grains, a surfactant, a compound capable of forming a complex with silicon oxide and silicon nitride, and a composition using the same.
- a method for forming a narrow trench isolation is disclosed. In this method, a high “selectivity” cannot be obtained without the presence of a surfactant, and it is specified that the addition of a surfactant is indispensable.
- the activator is used by adding about 0.1% to about 0.5%.
- a surfactant has a strong surfactant activity and foaming property, and an abrasive containing a surfactant is not necessarily suitable as an abrasive composition for polishing a semiconductor device.
- Japanese Patent Application Laid-Open No. H10-163130 discloses a surface of a semiconductor device having a main polishing step of polishing using a polishing liquid and a final polishing step of using a polishing agent. There has been disclosed a polishing method for flattening. However, there is a problem that the polishing step divided into two stages by this method is not efficient and productivity is low.
- Japanese Patent Application Laid-Open No. 7-70553 discloses a polishing liquid for polishing a substrate containing aluminum, which contains a chelating agent that forms a complex with aluminum.
- the application field of the technology described in the above-mentioned publication is polishing of a glass substrate or the like, which is completely different from the polishing field required by the shallow trench isolation method targeted by the present invention.
- An object of the present invention is to solve the above problems and problems, and an object of the present invention is to provide a shutter wrench isolation having a large selectivity of 10 or more and high controllability.
- An object of the present invention is to provide an abrasive composition for polishing a semiconductor device, which can be suitably used for the formation and is excellent in cleaning of abrasive grains from a polished wafer.
- Another object of the present invention is to provide a high polishing rate of an oxide film and a high polishing rate ratio of an oxide film and a nitride film, and a polishing surface scratch or a polishing surface after cleaning, which may cause a decrease in LSI performance.
- Manufacturing of semiconductor devices that can achieve high productivity in shallow trench isolation using a nitride film as a stopper and prevent performance degradation and yield reduction by using an abrasive composition with no residual particles. Provide a way
- the polishing composition for polishing a semiconductor device is a polishing composition for polishing a semiconductor device comprising water, polishing particles and a chelating agent, wherein the polishing material is cerium oxide, With an average particle size of 0.01 to 1.0 m
- the polishing rate of the former is obtained. Characterized in that the ratio of the polishing rate of the latter to
- the above-mentioned abrasive material comprises a fine particle of cerium oxide and other fine particles for polishing, wherein the other fine particles for polishing are aluminum oxide, zirconium oxide, silicon dioxide, titanium dioxide, manganese dioxide, dimanganese trioxide, oxide Chromium, iron oxide, tin oxide, zinc oxide, alumina magnesia spinel, mullite, zircon, aluminum hydroxide, calcium hydroxide, magnesium hydroxide, silicon nitride, titanium nitride, boron nitride, silicon carbide, titanium carbide, It includes at least one selected from the group consisting of diamonds.
- the concentration of the cerium oxide is 0.1 to 10% by mass, and the addition amount of the chelating agent is 0.01 to 10% by mass relative to the mass of the cerium oxide.
- the total fine particle concentration of the cerium oxide fine particles and the other polishing fine particles is 0.1 to 10% by mass, and the amount of the chelating agent added is 0.01 to 10% by mass relative to the total fine particles. Including.
- the chelating agent may be ethylenediaminetetraacetic acid (EDTA), cyclohexanediaminetetraacetic acid (CyDTA), tri-triacetate (NTA), hydroxyethylethylenediaminetriacetic acid (HEDTA), diethylenetriaminepentaacetic acid (DTPA), Triethylenetetramine hexaacetic acid (TTHA), L-glutamate diacetic acid (GLDA), Amino tri (methylene phosphonic acid), 1-hydroxyschilidene 1,1-diphosphonic acid, Ethylene diamine tetra (methylene phosphonic acid), Diethylene triamine Penyu (methylene phosphonic acid), mono-aranan diacetic acid (?
- EDDS iminodi
- IDA acetic acid
- HEIDA hydroxyethyliminodiacetic acid
- 1,3-butanepandiaminetetraacetic acid (1,3-PDTA) 1,3-butanepandiaminetetraacetic acid
- the polishing composition for polishing a semiconductor device further includes a polishing composition to which a dispersant is added in a concentration of 0.08% by mass or less, and the dispersant has a polyacrylic acid group or a polymethacrylic acid group. Including a dispersant.
- the polishing agent composition in the polishing agent composition, excluding abrasive particles, Mg, Al, K, Ca , Fe 3 Ni, Cu, Mn, Th, at least one selected from the group consisting of elements of U includes elemental elements as impurities, including the elemental concentration of 2 Oppm or less.
- the purity of the fine particles of cerium oxide used in the abrasive composition is 99.9% by mass or more and is composed of elements of Mg, Al, K, Ca, Fe, Ni, Cu, Mn, Th, and U. Including that the concentration of at least one element selected from the group is 3 O ppm or less.
- a part of the silicon nitride film is selectively removed to expose the semiconductor substrate, Forming a trench by etching the semiconductor substrate using the silicon film as a mask, depositing a silicon oxide film on the silicon nitride film and the semiconductor substrate, and filling the trench with the silicon oxide film;
- the step of selectively leaving the silicon oxide in the trench by performing planarization polishing using a silicon nitride film as a stopper performing the planarization polishing with the polishing composition for polishing a semiconductor device. It is characterized by.
- the present invention also includes a semiconductor substrate having an element isolation structure manufactured by the above-described method for manufacturing a semiconductor device.
- polishing composition has a high controllability and a high flatness because the polishing rate for the oxide film is high and the selectivity to the polishing rate for the silicon nitride film is high. It is possible to remove the scratches on the polished surface and clean the abrasive grains from the polished wafers well. It is suitably used as a polishing composition for polishing a semiconductor device when polishing an oxide film to be formed.
- FIG. 1 is a cross-sectional view showing a state in which a silicon oxide film and a silicon nitride film are formed on a semiconductor substrate, and then a shallow trench is formed.
- FIG. 2 is a sectional view showing a state in which a silicon oxide film is embedded in the trench of FIG.
- FIG. 3 is a cross-sectional view showing a state in which the buried silicon oxide film of FIG. 2 is flattened to form a shallow trench isolation.
- FIG. 4 is a cross-sectional view of a state in which the silicon nitride film is further removed from the state in which the shallow trench isolation of FIG. 3 is formed.
- the abrasive composition for polishing a semiconductor device of the present invention will be described.
- the polishing slurry composition of the present invention provides a composition which can be effectively used for forming the element isolation structure.
- the abrasive composition contains water, abrasive particles, and a chelating agent.
- cerium oxide fine particles can be used, and high-purity cerium oxide is preferable, for example, purity of 99% by mass or more, more preferably 99.5% by mass or more, and further preferably 9% by mass or more. 9.9% by mass or more is good. If the purity is low, cleaning semiconductor devices after polishing will adversely affect semiconductor characteristics 103147
- the high-purity cerium oxide contains Mg, Al, K, Ca, Fe, Ni in the cerium oxide fine particles. , Cu, Mn, Th, and U, the content of each element is preferably 30 ppm or less, preferably 1 ppm or less, and more preferably 3 ppm or less. If the content of the above element exceeds 3 Oppm, as in the above description, the number of defective products increases, and as a result, the yield deteriorates.
- cerium oxide when such cerium oxide is used as abrasive particles of a polishing compound for semiconductor devices comprising water, abrasive particles and a chelating agent, for example, in the abrasive composition for polishing semiconductor devices, in the abrasive composition for polishing semiconductor devices, in the abrasive composition excluding the abrasive particles, at least one element selected from the group consisting of g, Al, K, Ca, Fe, Ni, Cu, Mn, Th, and ⁇ as an impurity
- the composition can be provided, wherein the content of the element is 20 ppm or less, preferably 1 Oppm or less, more preferably 1 ppm or less.
- the average particle diameter of the cerium oxide particles (d 50) is, 0. 01 zm ⁇ :. L. 0 ⁇ M preferably, 0.5 L ⁇ m ⁇ 0 5 m is more preferable.
- d 50 of oxide Seriu ⁇ particles of less than 0. 01 / m, the polishing rate of the oxide film on a semiconductor device (in many cases a silicon dioxide film) resulting in summer small.
- d50 is more than 1.0 / m, it is not preferable because minute scratches are easily formed on the polished surface.
- the above average particle diameter (d 50 ) is effectively measured by a dynamic light scattering method.
- the primary particle diameter of cerium oxide is preferably 0.005 ⁇ ! To 0.5 m, more preferably 0.02 zm to 0.2 ⁇ m. If the thickness is less than 0.005 m, the polishing rate of the oxide film becomes extremely low, and a large selectivity cannot be obtained. However, here For the primary particle diameter referred to in Fig. 8, a value calculated from the specific surface area value obtained by the BET method assuming that the particle shape is a sphere is effective.
- the concentration of cerium oxide (fine particles) in the polishing composition of the present invention depends on polishing conditions such as the processing pressure during polishing, but is preferably 0.1 to 10% by mass, and 0.3 to 10% by mass. 5 mass% is more preferred. If the amount is less than 0.1% by mass, the polishing rate of the oxide film is reduced, and if the amount exceeds 10% by mass, the effect of increasing the amount is improved, that is, the improvement in the polishing rate of the oxide film is reduced. Absent.
- the concentration of cerium oxide specified here is the concentration in the abrasive composition at the time of use.
- the chelating agent may be any known chelating agent, and is not limited to a chemical structure.
- specific preferred examples of the present invention include ethylenediaminetetraacetic acid (EDTA), cyclohexanediaminetetraacetic acid (CyDTA), nitrilotriacetic acid (NTA), hydroxyethylethylenediaminetriacetic acid (HEDTA), Diethylenetriaminepentaacetic acid (DTPA), triethylenetetraminehexaacetic acid (TTHA), L-glutamic acid diacetate (GLDA), aminotri (methylenephosphonic acid), 1-hydroxyethylidene 1,1-diphosphonic acid, ethylenediaminetetra ( Methylenephosphonic acid), diethylenetriamine pen (methylenephosphonic acid), alanine diacetate (?
- -ADA hyalanninniacetic acid
- ASDA aspartic acid diacetate
- EDD S ethylenediamine nicosuccinic acid
- Iminodiacetic acid IDA
- HE IDA hydroxyethyliminodiacetic acid
- Puropanjiamin tetraacetic acid (1, 3- PD TA) and the like.
- EDTA ethylenediaminetetraacetic acid
- NTA nitrile triacetate
- ADA ⁇ alanine diacetate
- Hiichi ADA hyanalanine diacetate
- ASDA ethylenediamine Nicosuccinic acid
- HEIDA hydroxyethyliminodiacetic acid
- the chelating agent is used in the form of a free acid or a salt, but the free acid has low solubility in water, so that addition of a high concentration is limited. Therefore, it is preferable to use it in the form of a salt.
- the kind of salt is not particularly limited, but when there is a concern that the properties of LSI may be adversely affected, quaternary ammonium salts can be preferably used.
- preferred salts include lithium salt, sodium salt, potassium salt, cesium salt and the like.
- Preferred examples of the amines that supply the quaternary ammonium salt include ammonia, primary amines having a linear or branched saturated or unsaturated alkyl group having 1 to 10 carbon atoms, and secondary amines. Cyclic structures such as amines, tertiary amines, or primary, secondary, and tertiary amines having at least one aromatic ring having 6 to 10 carbon atoms, such as piperidine and piperazine And an amine having the formula:
- the amount of the chelating agent to be added depends on the polishing conditions such as the concentration of the cerium oxide fine particles in the composition of the present invention, the pH value of the composition, and the processing pressure during polishing.
- the mass ratio is preferably 0.1 to 10 mass ratio, more preferably 0.05 to 5 mass ratio, and still more preferably 0.1 to 3 mass ratio. If the mass ratio is less than 0.01, the amount of the chelating agent adsorbed on the surface of the silicon nitride film is small with respect to the abrasive grains acting during the polishing process, and the adsorption layer is poor. The effect of suppressing direct contact with the silicon nitride film is weak, making it impossible to reduce the polishing rate of the silicon nitride film. On the other hand, if the mass ratio exceeds 10, the effect of increasing the amount will be reduced, and the cost will be reduced. Not preferred.
- abrasives may be used in combination with the abrasive composition of the present invention in addition to cerium oxide.
- the other abrasive is used in an amount of 0.01 to 50% by mass, preferably 0.1 to 20% by mass, and more preferably 0.5 to 10% by mass of the total amount of the abrasive. The range of the amount% is good.
- the total fine particle concentration of the cerium oxide fine particles and the other fine particles for polishing is 0.1 to 10% by mass of the composition material amount, and the amount of the chelating agent added is 0.1 to the mass of the total fine particles. It is preferably used in a mass ratio of from 0.1 to 10%.
- the average particle size of the abrasive other than cerium oxide is preferably in the range of 0.1 to 1.0 ⁇ m, more preferably in the range of 0.1 to 0.5 ⁇ m.
- abrasives that can be used together include aluminum oxide, zirconium oxide, silicon dioxide, titanium dioxide, manganese dioxide, dimanganese trioxide, chromium oxide, iron oxide, tin oxide, zinc oxide, alumina magnesia spinel, and murai.
- Metal aluminum hydroxide, calcium hydroxide, magnesium hydroxide, silicon nitride, titanium nitride, boron nitride, silicon carbide, titanium carbide, diamond, etc., among which aluminum oxide, zirconium oxide, and the like.
- Silicon dioxide and titanium dioxide can be suitably used.
- a dispersant may be further added to the polishing composition, and in this case, a polishing composition for polishing semiconductor devices in which the concentration is adjusted to 0.08% by mass or less is preferable.
- the dispersant known dispersants can be used, and among them, polyorganic carboxylic acids are preferable, and examples thereof include dispersants containing a polyacrylic acid group or a polyacrylic acid group.
- the polyorganic carboxylic acid may be used in the above-mentioned abrasive composition as an ammonium salt or a salt of a quaternary amine of another organic amine.
- the polishing composition of the present invention is characterized by a high selectivity of the polishing rate between the silicon oxide film and the silicon nitride film, and the selectivity is at least 10 or more, more preferably 30 or more. , And even more than 50.
- the use of the abrasive composition of the present invention has a feature that scratches on the polished surface are drastically reduced, and a feature that the cleaning properties of the abrasive grains from the polished wafer are improved.
- a silicon nitride film 3 is formed by CVD or the like to a thickness of, for example, 200 nm.
- an opening having a width of, for example, 500 to 500 nm is formed at a predetermined position where a shallow trench of the silicon nitride film 3 is to be formed by, for example, a photolithography method using a photoresist. I do.
- the semiconductor substrate 1 is selectively etched using the silicon nitride film 3 provided with the opening as a mask to form a shallow trench 4 having a depth of, for example, 500 nm. If a silicon oxide film 5 is deposited on the entire surface of the semiconductor substrate 1 having a silicon nitride film 3 on its surface, for example, by a bias CVD method having a good embedding property, the trench 4 is completely filled with the silicon oxide film 5. (See Fig. 2).
- the surface of the silicon oxide film 5 is gradually polished as a flat surface despite having a concave portion on the trench 4.
- the polished surface reaches the surface of the silicon nitride film 3, but by then the surface is completely flattened, and the concave portion on the trench 4 disappears.
- Volicing is terminated when the surface of the silicon nitride film 3 is exposed.
- a shallow trench isolation 5 ' is formed.
- the silicon nitride film 3 may be used as it is as an insulating film on the semiconductor surface, but is usually removed as shown in FIG.
- the ratio of the polishing rates of silicon oxide and silicon nitride, that is, the selectivity be high. Further, if the surface after the flattening polishing is damaged, it is not desirable because the LSI characteristics may be degraded.
- the polishing composition of the present invention has been developed as the most suitable one for performing the flattening polishing to form a shallow trench.
- Abrasive composition of the present invention By appropriately selecting the particle size of the abrasive particles of the product, the amount added, the type of the chelating material, the amount added, etc., the above selection ratio can be at least 10 or more, preferably 30 or more, and 50 or more. Flattening polishing can be performed with good controllability. Another advantage is that scratches on the polishing plane can be eliminated, and the cleaning properties of the abrasive grains from the polished wafer can be improved.
- the polishing using the abrasive composition of the present invention can be performed by a known polishing method or a chemical mechanical polishing (CMP) method.
- CMP chemical mechanical polishing
- High-purity cerium oxide was prepared by heat treatment from commercially available cerium carbonate.
- This cerium oxide has an average particle size (d 50 ) of 0.2 m, a primary particle size of 0.08 ⁇ m, and a purity of 99.9 mass% or more (chemical analysis values: Mg, Al, K, Ca, Fe, Ni , Cu, Mn, Th, and U are 3 ppm or less, respectively).
- a slurry-like abrasive composition containing 1% by mass of the fine particles of cerium oxide, 0.3% by mass of a triammonium salt of ethylenediaminetetraacetic acid (EDTA ⁇ ⁇ ⁇ 3 (NH 4 )), and the balance of water. I made things.
- the amount of EDTA'H '3 (NH 4 ) was 0.3 mass ratio to cerium oxide.
- the pH value of this composition was 7.2.
- the concentrations of all the above elements were 0 for Mg, Al, K, Ca, Fe, Ni, Cu, Mn, Th, and ⁇ . It was less than 5 ppm.
- polishing performance of the abrasive slurry on the silicon dioxide film and the silicon nitride film was evaluated by the following method.
- Polishing agent Silicon dioxide film (approximately l ⁇ m thick) formed by CVD on a silicon wafer with a thickness of ⁇ ⁇ ⁇ 6 inches and a thickness of 625 ⁇ m (2) Silicon nitride film (approximately 0.5 ⁇ m thick) formed by CVD on a 6 inch ⁇ , 625 ⁇ m thick silicon wafer
- Double-layer type polishing pad for semiconductor device (IC1000 / Suba400, manufactured by Kuchi-Del-Nitta Co., Ltd.)
- Polishing machine Single-side polishing machine for polishing semiconductor devices (manufactured by Speed Fam Co., Ltd., model number SH-24, platen diameter 610 mm)
- polishing rate Measured with an optical interference type film thickness measuring device
- Nisani ⁇ Kei Motomaku is 0.19 pieces / cm 2
- a nitride Kei Motomaku is 0.38 pieces / cm 2
- good cleaning level is 0.19 pieces / cm 2
- a slurry was prepared by further adding ammonium polyacrylate to the abrasive composition described in Example 1 so as to have a concentration of 0.004% by mass, and the same evaluation as in Example 1 was performed. Table 1 shows the results.
- Example 1 Example 1 was repeated except that the chelating agent was changed from EDTA ⁇ H ⁇ 3 (NH 4 ) to /? Alanine diacetate (?-AD A) and the pH of the slurry was adjusted to near neutrality by adding aqueous ammonia.
- a slurry-like abrasive composition was prepared under the same conditions as in Example 1 and evaluated in the same manner as in Example 1. Table 1 shows the results.
- the chelating agent was changed from EDTA' ⁇ ⁇ 3 (NH 4 ) to hydroxyethyliminodiacetic acid (HE IDA), the concentration of the chelating agent was changed to 0.5% by mass, and the pH of the slurry was adjusted by adding aqueous ammonia.
- a slurry abrasive composition was prepared under the same conditions as in Example 1 except that the composition was adjusted to near neutrality, and the same evaluation as in Example 1 was performed. Table 1 shows the results.
- EDTA ⁇ H ⁇ 3 (NH 4 ) was used as the chelating agent, and aspartic acid diacetate (ASDA) was used.
- the concentration of the chelating agent was changed to 0.5% by mass, and the pH of the slurry was adjusted by adding ammonia water.
- a slurry-like abrasive composition was prepared under the same conditions as in Example 1 except that the polishing composition was adjusted to the vicinity of the property, and the same evaluation as in Example 1 was performed. Table 1 shows the results.
- a slurry-like abrasive composition was prepared under the same conditions as in Example 1 except that the pH was adjusted to around neutral, and the same evaluation as in Example 1 was performed. Table 1 shows the results.
- a slurry-like abrasive composition was prepared under the same conditions as in Example 1 except that EDTA 'H' 3 (NH 4 ) was not added, and the same evaluation as in the example was performed. Table 1 shows the results.
- cerium oxide jum primary particle diameter 0. 13 m is to create an shaped abrasive composition slurry under the same conditions as in Example 1, Example 1 The same evaluation was performed. Table 1 shows the results.
- Average particle size (d 50 ) 0.008
- a slurry-type abrasive composition was prepared under the same conditions as in Example 1 except that a ceramic oxide having a primary particle size of 0.004 ⁇ m was used. The same evaluation as in 1 was performed. Table 1 shows the results.
- the polishing rate for silicon dioxide which is an oxide film
- the selectivity with the polishing rate for a silicon nitride film is large, so that planarization polishing with high controllability can be performed. It is possible to use it, and there are few scratches generated on the polished surface and the cleaning property of the abrasive grains from the polished wafer is good. In many cases, it is suitably used as an abrasive composition for polishing a semiconductor device used when polishing a silicon dioxide film.
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Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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AU48756/01A AU4875601A (en) | 2000-04-13 | 2001-04-12 | Polishing compound for polishing semiconductor device and method for manufacturing semiconductor device using the same |
EP01921818A EP1274123A4 (en) | 2000-04-13 | 2001-04-12 | POLISHING FOR THE POLISHING OF SEMICONDUCTOR WASHERS AND METHOD FOR THE PRODUCTION OF SEMICONDUCTOR ARRANGEMENTS USING THIS POLISHING AGENT |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2000112532 | 2000-04-13 | ||
JP2000-112532 | 2000-04-13 |
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WO2001080296A1 true WO2001080296A1 (fr) | 2001-10-25 |
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PCT/JP2001/003147 WO2001080296A1 (fr) | 2000-04-13 | 2001-04-12 | Compose de polissage pour le polissage de dispositif a semiconducteur et procede de fabrication de dispositif a semiconducteur dans lesquel ledit compose est utilise |
Country Status (5)
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EP (1) | EP1274123A4 (ja) |
KR (2) | KR100863088B1 (ja) |
AU (1) | AU4875601A (ja) |
TW (1) | TW586157B (ja) |
WO (1) | WO2001080296A1 (ja) |
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EP2858097B1 (en) * | 2012-05-30 | 2019-02-27 | Kuraray Co., Ltd. | Slurry for chemical mechanical polishing and chemical mechanical polishing method |
KR101464881B1 (ko) * | 2013-06-10 | 2014-11-25 | 오씨아이 주식회사 | 금속 제거용 킬레이트제를 포함하는 웨이퍼 세정용 알칼리 수용액 |
CN106115612B (zh) * | 2016-07-11 | 2017-11-17 | 中国电子科技集团公司第四十五研究所 | 一种晶圆平坦化方法 |
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- 2001-04-12 WO PCT/JP2001/003147 patent/WO2001080296A1/ja active Application Filing
- 2001-04-12 KR KR1020077030868A patent/KR100863088B1/ko active IP Right Grant
- 2001-04-12 KR KR1020017016002A patent/KR100826725B1/ko active IP Right Grant
- 2001-04-12 AU AU48756/01A patent/AU4875601A/en not_active Abandoned
- 2001-04-12 EP EP01921818A patent/EP1274123A4/en not_active Withdrawn
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Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2004061925A1 (ja) * | 2002-12-31 | 2004-07-22 | Sumitomo Mitsubishi Silicon Corporation | 化学的機械研磨用スラリー組成物、これを利用した半導体素子の表面平坦化方法及びスラリー組成物の選択比制御方法 |
JP2005068312A (ja) * | 2003-08-26 | 2005-03-17 | Mitsui Mining & Smelting Co Ltd | フッ素を含有するセリウム系研摩材およびその製造方法 |
JP2015091971A (ja) * | 2003-09-12 | 2015-05-14 | 日立化成株式会社 | セリウム塩の製造方法、酸化セリウム及びセリウム系研磨剤 |
US7442646B2 (en) | 2004-08-03 | 2008-10-28 | Samsung Electronics Co., Ltd. | Slurry, chemical mechanical polishing method using the slurry, and method of forming metal wiring using the slurry |
WO2006046641A1 (ja) * | 2004-10-28 | 2006-05-04 | Nissan Chemical Industries, Ltd. | シリコンウェハー用研磨組成物 |
GB2432840A (en) * | 2004-10-28 | 2007-06-06 | Nissan Chemical Ind Ltd | Polishing composition for silicon wafer |
JPWO2006046641A1 (ja) * | 2004-10-28 | 2008-05-22 | 日産化学工業株式会社 | シリコンウェハー用研磨組成物 |
JP2013020688A (ja) * | 2011-05-20 | 2013-01-31 | Ohara Inc | 情報記録媒体用基板の製造方法 |
US9960048B2 (en) | 2013-02-13 | 2018-05-01 | Showa Denko K.K. | Surface machining method for single crystal SiC substrate, manufacturing method thereof, and grinding plate for surface machining single crystal SiC substrate |
US10453693B2 (en) | 2013-02-13 | 2019-10-22 | Showa Denko K.K. | Surface machining method for single crystal SiC substrate, manufacturing method thereof, and grinding plate for surface machining single crystal SiC substrate |
KR20220017651A (ko) * | 2020-08-05 | 2022-02-14 | 주식회사 아이에스티이 | 기판 폴리싱을 위한 세륨옥사이드-징크옥사이드 합금 연마입자 및 그 제조방법 |
KR102429708B1 (ko) | 2020-08-05 | 2022-08-05 | 주식회사 아이에스티이 | 기판 폴리싱을 위한 세륨옥사이드-징크옥사이드 합금 연마입자 및 그 제조방법 |
WO2024162437A1 (ja) * | 2023-02-02 | 2024-08-08 | 三井金属鉱業株式会社 | 研磨材スラリー |
Also Published As
Publication number | Publication date |
---|---|
EP1274123A1 (en) | 2003-01-08 |
KR20080005313A (ko) | 2008-01-10 |
KR100863088B1 (ko) | 2008-10-13 |
KR20020026877A (ko) | 2002-04-12 |
AU4875601A (en) | 2001-10-30 |
EP1274123A4 (en) | 2007-03-07 |
TW586157B (en) | 2004-05-01 |
KR100826725B1 (ko) | 2008-04-30 |
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