WO2006126583A1 - Bpsg膜とsod膜を含む基板のエッチング液 - Google Patents
Bpsg膜とsod膜を含む基板のエッチング液 Download PDFInfo
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- WO2006126583A1 WO2006126583A1 PCT/JP2006/310343 JP2006310343W WO2006126583A1 WO 2006126583 A1 WO2006126583 A1 WO 2006126583A1 JP 2006310343 W JP2006310343 W JP 2006310343W WO 2006126583 A1 WO2006126583 A1 WO 2006126583A1
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- WIPO (PCT)
- Prior art keywords
- salt
- etching solution
- lower alkyl
- mono
- etching
- Prior art date
Links
- 239000000758 substrate Substances 0.000 title description 5
- 238000005530 etching Methods 0.000 claims abstract description 101
- 150000003839 salts Chemical class 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000003960 organic solvent Substances 0.000 claims abstract description 20
- 150000004673 fluoride salts Chemical class 0.000 claims abstract description 19
- 125000005842 heteroatom Chemical group 0.000 claims abstract description 16
- 150000005215 alkyl ethers Chemical class 0.000 claims description 33
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 30
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 30
- 125000000217 alkyl group Chemical group 0.000 claims description 18
- 150000001412 amines Chemical class 0.000 claims description 17
- 150000003973 alkyl amines Chemical class 0.000 claims description 16
- 125000004183 alkoxy alkyl group Chemical group 0.000 claims description 15
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 12
- 150000002148 esters Chemical class 0.000 claims description 11
- -1 ether compound Chemical class 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 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 claims description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims description 8
- 125000004448 alkyl carbonyl group Chemical group 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 5
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- WAEVWDZKMBQDEJ-UHFFFAOYSA-N 2-[2-(2-methoxypropoxy)propoxy]propan-1-ol Chemical compound COC(C)COC(C)COC(C)CO WAEVWDZKMBQDEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 239000005380 borophosphosilicate glass Substances 0.000 claims 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical group OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims 1
- 125000004494 ethyl ester group Chemical group 0.000 claims 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052796 boron Inorganic materials 0.000 abstract description 4
- 239000005360 phosphosilicate glass Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 39
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 description 8
- 239000003208 petroleum Substances 0.000 description 8
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- GDFCWFBWQUEQIJ-UHFFFAOYSA-N [B].[P] Chemical compound [B].[P] GDFCWFBWQUEQIJ-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- RRSMHQNLDRCPQG-UHFFFAOYSA-N methanamine;hydrofluoride Chemical compound [F-].[NH3+]C RRSMHQNLDRCPQG-UHFFFAOYSA-N 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- YZCKVEUIGOORGS-UHFFFAOYSA-N Hydrogen atom Chemical class [H] YZCKVEUIGOORGS-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- LPLMZAJYUPAYQZ-UHFFFAOYSA-N diazanium;difluoride Chemical compound [NH4+].[NH4+].[F-].[F-] LPLMZAJYUPAYQZ-UHFFFAOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- XLLIQLLCWZCATF-UHFFFAOYSA-N ethylene glycol monomethyl ether acetate Natural products COCCOC(C)=O XLLIQLLCWZCATF-UHFFFAOYSA-N 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- MOVBJUGHBJJKOW-UHFFFAOYSA-N methyl 2-amino-5-methoxybenzoate Chemical compound COC(=O)C1=CC(OC)=CC=C1N MOVBJUGHBJJKOW-UHFFFAOYSA-N 0.000 description 2
- DPBLXKKOBLCELK-UHFFFAOYSA-N pentan-1-amine Chemical compound CCCCCN DPBLXKKOBLCELK-UHFFFAOYSA-N 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 2
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- 235000012431 wafers Nutrition 0.000 description 2
- LEEANUDEDHYDTG-UHFFFAOYSA-N 1,2-dimethoxypropane Chemical compound COCC(C)OC LEEANUDEDHYDTG-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- VBVHNUMQFSVYGE-UHFFFAOYSA-N 1-[1-(1-methoxypropan-2-yloxy)propan-2-yloxy]propan-2-yl acetate Chemical compound COCC(C)OCC(C)OCC(C)OC(C)=O VBVHNUMQFSVYGE-UHFFFAOYSA-N 0.000 description 1
- RERATEUBWLKDFE-UHFFFAOYSA-N 1-methoxy-2-[2-(2-methoxypropoxy)propoxy]propane Chemical compound COCC(C)OCC(C)OCC(C)OC RERATEUBWLKDFE-UHFFFAOYSA-N 0.000 description 1
- BJINVQNEBGOMCR-UHFFFAOYSA-N 2-(2-methoxyethoxy)ethyl acetate Chemical compound COCCOCCOC(C)=O BJINVQNEBGOMCR-UHFFFAOYSA-N 0.000 description 1
- SDHQGBWMLCBNSM-UHFFFAOYSA-N 2-[2-(2-methoxyethoxy)ethoxy]ethyl acetate Chemical compound COCCOCCOCCOC(C)=O SDHQGBWMLCBNSM-UHFFFAOYSA-N 0.000 description 1
- FHCUSSBEGLCCHQ-UHFFFAOYSA-M 2-hydroxyethyl(trimethyl)azanium;fluoride Chemical compound [F-].C[N+](C)(C)CCO FHCUSSBEGLCCHQ-UHFFFAOYSA-M 0.000 description 1
- ASUDFOJKTJLAIK-UHFFFAOYSA-N 2-methoxyethanamine Chemical compound COCCN ASUDFOJKTJLAIK-UHFFFAOYSA-N 0.000 description 1
- ASZZHBXPMOVHCU-UHFFFAOYSA-N 3,9-diazaspiro[5.5]undecane-2,4-dione Chemical compound C1C(=O)NC(=O)CC11CCNCC1 ASZZHBXPMOVHCU-UHFFFAOYSA-N 0.000 description 1
- QCAHUFWKIQLBNB-UHFFFAOYSA-N 3-(3-methoxypropoxy)propan-1-ol Chemical compound COCCCOCCCO QCAHUFWKIQLBNB-UHFFFAOYSA-N 0.000 description 1
- SOYBEXQHNURCGE-UHFFFAOYSA-N 3-ethoxypropan-1-amine Chemical compound CCOCCCN SOYBEXQHNURCGE-UHFFFAOYSA-N 0.000 description 1
- FAXDZWQIWUSWJH-UHFFFAOYSA-N 3-methoxypropan-1-amine Chemical compound COCCCN FAXDZWQIWUSWJH-UHFFFAOYSA-N 0.000 description 1
- VATRWWPJWVCZTA-UHFFFAOYSA-N 3-oxo-n-[2-(trifluoromethyl)phenyl]butanamide Chemical compound CC(=O)CC(=O)NC1=CC=CC=C1C(F)(F)F VATRWWPJWVCZTA-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 241000833292 Ambassis Species 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- DHXVGJBLRPWPCS-UHFFFAOYSA-N Tetrahydropyran Chemical compound C1CCOCC1 DHXVGJBLRPWPCS-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000005011 alkyl ether group Chemical group 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- LDDQLRUQCUTJBB-UHFFFAOYSA-N ammonium fluoride Chemical compound [NH4+].[F-] LDDQLRUQCUTJBB-UHFFFAOYSA-N 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical group FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229940100684 pentylamine Drugs 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- 239000011698 potassium fluoride Substances 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- BFXAWOHHDUIALU-UHFFFAOYSA-M sodium;hydron;difluoride Chemical compound F.[F-].[Na+] BFXAWOHHDUIALU-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 125000005208 trialkylammonium group Chemical group 0.000 description 1
- YFNKIDBQEZZDLK-UHFFFAOYSA-N triglyme Chemical compound COCCOCCOCCOC YFNKIDBQEZZDLK-UHFFFAOYSA-N 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
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3063—Electrolytic etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
Definitions
- the present invention relates to an etching solution, a method for producing an etched product, and an etched product that can be obtained by the method. More specifically, the present invention relates to a non-anneal boron phosphorous glass film (BPSG) or the like. Etching solution that etches doped oxide film and non-doped oxide film such as non-annealed SOD film, TEOS film, thermal oxide film (THOX), etc. at the same speed or close to the etching rate, method for producing etched product, and The present invention relates to an etched product obtained by the method.
- BPSG non-anneal boron phosphorous glass film
- ultrafine devices such as ULSI are manufactured by a low-temperature process.
- an etching solution in which the selection ratio between the non-anneal BPSG film and the thermal oxide film and the selection ratio between the non-anneal S OD film and the thermal oxide film are about the same, and about 3 or less. Desired.
- an etching solution composed of fluoride salt, water, and ethanol used in Patent Document 1 is a non-anneal BPSG manufactured by a low-temperature process. Is produced by a low-temperature process because one or both of the selectivity ratios of non-anneal SOD film and thermal oxide film exceed 3. It became clear that it was not suitable as an etching solution for ultra-fine devices.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-164585
- the present invention relates to a non-anneal BPSG of an ultrafine device manufactured by a low temperature process. It is an object to provide an etching solution, an etching method, and an etching treatment product for etching a film, a thermal oxide film, and a non-anneal SOD film and a thermal oxide film at the same speed or close to each other. To do.
- the present invention relates to the following items 1 to 15.
- Item 1 Fluoride salt and bifluoride salt power Group power of at least one selected salt and an organic solvent having a heteroatom, thermal oxide film (THOX), non-anneal BPSG (boron phosphorus) Glass) film and non-anneal SOD (Spin on Dielectric) film etch rate of 100 A / min or less at 23 ° C, non-anneal BPSG film, etching rate ratio with Z thermal oxide film, and non-anneal SOD film An etchant with an etch rate ratio of 3 or less for both the Z thermal oxide film and the SOD film.
- THOX thermal oxide film
- non-anneal BPSG boron phosphorus
- SOD Spin on Dielectric
- Item 2 The etching solution according to Item 1, wherein the organic solvent having a hetero atom is an ether compound.
- n 1, 2, 3 or 4
- R 1 or R 2 are the same or different and each represents a lower alkyl group or a lower alkyl carbonyl group.
- Item 2 An etching solution according to Item 1, which is a compound represented by:
- Item 5 The etching solution according to item 3 or 4, wherein the flash point of the organic solvent in the etching solution is 60 ° C or higher.
- Item 6 The item 2, 3 or 4 comprising at least one selected from the group consisting of 0.005 mol / kg to 0.1 mol / kg fluoride salt and bifluoride salt, and less than 5% by weight of water. Etching solution.
- Item 7. Organic solvent power having heteroatoms Tetrahydrofuran, ethylene glycol dilower alkyl ether, propylene glycol dilower alkyl ether, ethylene glycol mono lower alkyl ether mono lower alkanol ester, propylene glycol mono lower alkyl ether mono lower Item 7.
- the etching solution according to any one of Items 1 to 6, which is at least one selected from the group force that is also composed of alkanoyl ester and dipropylene glycol mono-lower alkyl ether force.
- Item 8 Organic solvent power having hetero atoms Tetrahydrofuran, ethylene glycol dilower alkyl ether, propylene glycol dilower alkyl ether, ethylene glycol mono lower alkyl ether mono lower alkanol ester, propylene glycol mono lower alkyl ether mono lower Item 7.
- Item 9 Fluoride salt and bifluoride salt power Group power at least one selected salt power Etching according to any one of Items 1 to 7, which is a bifluoride salt of ammonia or mono-lower alkylamine. liquid.
- At least one salt selected from the group consisting of fluoride salts and bifluoride salts is hydrogen fluoride ammonium, mono-lower alkylamine bifluoride salt, di-lower alkylamine amine heavy salt.
- Item 9 The etching solution according to any one of Items 1 to 8, wherein the etching force is at least one selected from the group force of chemical salt power.
- At least one salt selected from the group consisting of a fluoride salt and a bifluoride salt is a mono-lower alkylamine bifluoride salt, a tri-lower alkylamine bifluoride salt, or a mono (lower alkoxyalkyl).
- V which is at least one selected from the group force consisting of a bifluoride salt of amin and a difluoride salt of di (lower alkoxyalkyl) amine.
- Item 12. Selected from the group consisting of 0.005 mol / kg to 0.1 mol / kg fluoride salt and bifluoride salt An etching solution containing at least one kind of water, less than 3% by weight of water, and tripropylene glycol mono-lower alkyl ether.
- Item 13 The etching solution according to Item 12, which is tripropylene glycol mono-lower alkyl ether strength tripropylene glycol monomethyl ether.
- Item 14 A method for producing an etched product, which comprises etching an object to be etched using the etching solution according to any one of Items 1 to 13.
- the etching rate of the film is! /, And the deviation is 100 A / min or less at 23 ° C;
- Non-anneal SOD film Etching rate ratio with Z thermal oxide film (THOX) is 3 or less.
- the etching rates of the non-anneal BPSG film and the non-anneal SOD (Spin on Dielectric) film are both about 100 A / min, preferably about 80 A / min, more preferably about 60 A at 23 ° C. / Min or less, more preferably about 40 A / min or less, and most preferably about 25 A / min or less.
- the lower limit of the etching rate is about 5 A / min, preferably about 10 A / min. Etching rate is low and processing is easier and easier. /.
- Etching rate ratio with non-anneal BPSG film Z thermal oxide film is 3 or less, preferably 2.5 or less, more preferably 2 or less, more preferably 1.8 or less, especially 1.6. It is as follows. The lower limit of the etching rate ratio is about 1, and the closer to 1, the better.
- the etching rate ratio with the non-anneal SOD film Z thermal oxide film is 3 or less, preferably 2.5 or less, more preferably 2 or less, still more preferably 1.8 or less, especially 1.6. It is as follows. The lower limit of the etching rate ratio is about 1, and the closer to 1, the better.
- the difference between the etching rate ratio between the non-anneal BPSG film and the thermal oxide film (THOX) and the etching rate ratio between the non-anneal SOD film and the thermal oxide film (THOX) is preferably 1.5 or less. More preferably, it is 1.0 or less, more preferably 0.7 or less, particularly preferably 0.4 or less, and 0 is most preferable.
- a semiconductor device manufactured by a low temperature annealing process and including a non-doped BPSG film, a non-anneal SOD film, a TEOS and the like, an undoped oxide film For example, ultrafine devices such as ULSI are listed. Examples of devices treated with the etching solution of the present invention are shown in FIGS. 1 (A) and 1 (B). The device shown in Fig.
- A is a non-doped oxide film 1 such as TEOS manufactured by a low-temperature process on the side of the contact hole, a doped oxide film such as a non-anneal BPSG film or a BSG film 2, and a non-anneal SO film.
- D film 3 is provided. If the SOD film or BPSG film is etched and sharply etched when cleaning the bottom surface of the contact hole 4, problems such as disconnection will occur when W, A1, Cu, etc. are embedded in the inner surface of the contact hole later. It will be. On the other hand, a low temperature process is required to suppress the diffusion of the transistor dopant.
- a non-doped oxide film 1 such as TEOS manufactured by a low-temperature process on the side of the contact hole
- a doped oxide film such as a non-anneal BPSG film or a BSG film 2
- D film 3 is provided. If the SOD film or BPSG film is etched and sharply etched when cleaning the bottom surface of the contact
- FIG. 1 (B) shows a case where a non-annealed BPSG film or a BSG film such as a BSG film manufactured by a low-temperature process and a non-annealed SOD film 3 coexist on the side surface of the contact hole 4. If the SOD film or BPSG film is etched and removed greatly during cleaning of the bottom surface of the contact hole, the contact hole diameter becomes too large.
- the etching solution of the present invention is used in the manufacture of these devices manufactured by a low temperature process, for example, an etching solution for manufacturing contact holes and via holes, a cleaning solution for cleaning contact holes, via holes, and the like. Can be suitably used.
- non-anneal means that it is manufactured by a low-temperature annealing process.
- non-doped oxide films such as non-anneal BPSG film, non-anneal SOD film, and TEOS film are V deviation also means that the film is formed by a low temperature process to produce ultra-fine devices.
- non-anneal BPSG film or non-anneal SOD film and etch rate selectivity ratio is the ratio of thermal oxide film (THOX). This is because it is determined by the THOX etch rate standard.
- the low temperature process is not particularly limited, and can be performed at a temperature of, for example, about 300 to about 500 ° C. or lower. The low temperature process is described in, for example, “Advanced Elect Port-Series 1-15, Ultra Clean ULSI Technology, written by Tadahiro Omi, 1995”.
- the boron doping amount of the BPSG film used in this specification is 1 to 5% by weight, the doping amount of phosphorus is 2 to 10% by weight, and the total doping amount of boron and phosphorus is 3 to 15% by weight. is there.
- a BPSG film is generally manufactured by a CVD method such as LPCVD.
- the SOD film used in the present specification is a film produced by a coating method, and may be either an organic SOD film or an inorganic SOD film, but an inorganic SOD film is preferably exemplified.
- the SOD film is mainly composed of silicon dioxide and is doped with other elements.
- the etching rate of the etching solution of the present invention is such that the non-anneal B PSG film or the non-anneal SOD film and the thermal oxide film are etched at 23 ° C, and the film thickness and etching process of each film before the etching process are performed. It is calculated by dividing the difference in film thickness later by the etching time.
- Examples of the fluoride salt and bifluoride salt of the present invention include metal salts, ammonium salts, and quaternary ammonium salts.
- metal salts include potassium fluoride, sodium fluoride, potassium hydrogen fluoride, sodium hydrogen fluoride, etc., which have high solubility.
- Ammonium salts include ammonium fluoride.
- quaternary ammonium salts include tetramethylammonium fluoride and methylamine fluoride. , 2-hydroxyethyltrimethylammonium fluoride, tetramethylammonium fluoride (NMe'F), and the like.
- bifluoride salts include potassium fluoride, sodium fluoride, potassium hydrogen fluoride, sodium hydrogen fluoride, etc., which have high solubility.
- Ammonium salts include ammonium fluoride.
- Mono-lower alkylamines such as methylamine, ethylamine, propylamine, butylamine and pentylamine; di-lower alkylamines such as dimethylamine and jetylamine; tri-lower alkylamines such as trimethylamine and triethylamine; tetra-lower alkylamines; mono (Hydroxy lower alkyl) trialkyl ammonium; mono (hydroxy lower alkyl) amine; mono (lower alkoxyalkyl) amine such as methoxyethylamine, methoxypropylamine, ethoxypropylamine; di (methoxyethyl) amine Di (lower alkoxyalkyl) amine such as tri (lower alkoxyalkyl) amine And chloride salts and bifluoride salts. Of these, bifluoride salts such as mono-lower alkylamine, tri-lower alkylamine, mono (lower alkoxyal
- the hydrogen monomethyldifluoride ammonium ammonium contained in the etching solution of the present invention is a mixture of a theoretical amount of methylamine and HF that can capture a crystal or aqueous solution of methyl monohydrogen difluoride ammonium.
- methyl hydrogen monofluoride ammonium may be formed in the etching solution.
- the methylammonium fluoride contained in the etching solution of the present invention contains a theoretical amount of methylamine and HF that can be used to store crystals or aqueous solutions of methylammonium fluoride (molar concentration ratio).
- Examples of the organic solvent having a heteroatom include ether compounds, which may be linear or cyclic, or misaligned.
- Preferred examples of the ether compound U, and specific examples include the following compounds:
- Cyclic ethers such as tetrahydrofuran (THF), tetrahydropyran, dioxane, etc .; linear or branched chain ethers such as jetyl ether, diisopropyl ether;
- Ethylene glycol di-lower alkyl ethers such as ethylene glycol dimethyl ether
- Propylene glycol di-lower alkyl etheres such as propylene glycol dimethyl ether
- Ethylene glycol mono-lower alkyl ether mono-lower alkanol esters such as ethylene glycol monomethyl ether acetate
- Propylene glycol mono lower alkyl ether mono lower alkanol esters such as propylene glycol monomethyl ether acetate
- Dipropylene glycol mono-lower alkylenole etherenole such as dipropylene glycol monomethyl ether
- Diethylene glycol di-lower alkyl etherole such as diethylene glycol dimethyl ether
- Dipropylene glycol di-lower alkenoate ethere such as dipropylene glycol dimethyl ether
- Diethylene glycol mono lower alkyl ether mono lower alkanol ester such as diethylene glycol monomethyl ether acetate
- Dipropylene glycol monomono lower alkyl ether mono lower alkanol esters such as dipropylene glycol monomono ethinore acetate
- Tripropylene glycol mono-lower alkylenole etherenole such as tripropylene glycol monomethyl ether
- Triethylene glycol di-lower alkyl etherole such as triethylene glycol dimethyl ether
- Tripropylene glycol di-lower alkinoatenole such as tripropylene glycol dimethyl ether
- Triethylene glycol mono lower alkyl ether mono lower alkanol ester such as triethylene glycol monomethyl ether acetate
- Tripropylene glycol mono-lower alkyl ether mono-lower alkanol esters such as tripropylene glycol monomethyl ether acetate.
- n 1, 2, 3 or 4
- R 1 or R 2 are the same or different and represent a lower alkyl group or a lower alkyl carbonyl group.
- R 1 and R 2 represents a lower alkyl group or a lower alkyl carbonyl group, and the other represents a hydrogen atom
- the flash point of the organic solvent having a heteroatom of the present invention is preferably 60 ° C or higher, more preferably 70 ° C or higher.
- commonly used components such as surfactants and anticorrosives are blended in an amount of 5 wt% or less, preferably 3 wt% or less, more preferably 1 wt% or less. be able to.
- alkyl refers to straight-chain or branched C 1 -C alkyl
- “Lower alkyl” refers to a straight or branched chain such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, t-butynole, pentinole, hexyl, cyclopentyl, cyclohexenole. Both C 1 -C alkyl and C 1 -C cycloalkyl with branches
- Preferred lower alkyls are straight chain or branched c to
- a c-c alkyl having a straight chain or a branch particularly methyl or ethyl.
- “Lower alkoxy” refers to C 1 -C 6 having a straight chain or a branch such as methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, sec-butoxy, t-butoxy, pentyloxy, hexyloxy, and the like. Alkoxy, especially methoxy or ethoxy.
- At least one salt selected from the group consisting of a fluoride salt and a bifluoride salt is about 0.005 to 0.1 mol / kg, preferably about 0.075 to 0.05 mol / kg. More preferably, about 0.01 to 0.025 mol / kg is used.
- the etching solution of the present invention may contain water, its content is less than 5% by weight, preferably 3% by weight or less, more preferably 2% by weight or less, and even more preferably 1% by weight or less. Particularly preferably, it is 0.5% by weight or less. As the amount of water increases, the etching rate ratio with the non-anneal BPSG film Z thermal oxide film and the etching rate ratio with the non-anneal SOD film Z thermal oxide film tend to increase.
- a preferable etching solution of the present invention is such that at least one salt selected from the group consisting of a fluoride salt and a bifluoride salt is about 0.01 to 0.025 mol / kg, water is 3% by weight or less, and the rest is heavy. It is an organic solvent having a tera atom.
- the temperature of the etching solution is about 15 to 40 ° C, and the time is about 0.25 to 10 minutes.
- Examples of the object to be etched include semiconductor substrates such as silicon single crystal wafers, gallium arsenide wafers, and the like, and in particular, non-anneal doped oxide films (BSG, BPSG, PS G, AsSG, etc.), non-annealed undoped oxide films (TEOS, etc.) and non-annealed SOD films are preferred.
- semiconductor substrates such as silicon single crystal wafers, gallium arsenide wafers, and the like
- non-anneal doped oxide films BSG, BPSG, PS G, AsSG, etc.
- TEOS non-annealed undoped oxide films
- SOD films non-annealed SOD films
- the non-anneal BPSG film and the thermal oxide film, and the non-anneal SOD film and the thermal oxide film can be etched at a uniform speed or a rate close thereto. Etching of the semiconductor device can be performed suitably.
- FIGS. 1A and 1B show examples of devices treated with the etching solution of the present invention.
- the etching rate was measured by measuring the film thickness before and after etching using Nanometrics Japan Co., Ltd. Nanospec 3000AF-T.
- the etching rate of the etching solution was calculated by etching each film for 5 minutes at 23 ° C, and dividing the difference between the film thickness before the etching process and the film thickness after the etching process by the etching time. Is.
- An etchant is prepared by mixing the organic solvent in the proportions shown in Table 1, and a non-anneal BPSG (boron phosphorus glass) film, non-anneal SOD (Spin on Dielectric) film, thermal oxide film (THOX) on the silicon substrate.
- BPSG boron phosphorus glass
- SOD Spin on Dielectric
- THOX thermal oxide film
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Abstract
Description
Claims
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CN2006800179123A CN101180712B (zh) | 2005-05-25 | 2006-05-24 | 具有bpsg膜和sod膜的基板的蚀刻液 |
JP2007517860A JP5034942B2 (ja) | 2005-05-25 | 2006-05-24 | Bpsg膜とsod膜を含む基板のエッチング液 |
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JP2005-152914 | 2005-05-25 | ||
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JP (1) | JP5034942B2 (ja) |
KR (1) | KR100927080B1 (ja) |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008172193A (ja) * | 2007-01-05 | 2008-07-24 | Hynix Semiconductor Inc | キャパシタのリーニング防止用食刻液組成物及びこれを用いたキャパシタ製造方法 |
KR100939770B1 (ko) | 2007-03-15 | 2010-01-29 | 주식회사 하이닉스반도체 | 웨이퍼 세정 방법 |
CN101499418B (zh) * | 2008-01-31 | 2012-08-15 | 大日本网屏制造株式会社 | 基板处理装置及其所使用的基板支撑构件 |
US8828877B2 (en) | 2009-05-25 | 2014-09-09 | Az Electronic Materials Usa Corp. | Etching solution and trench isolation structure-formation process employing the same |
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JPS4952799A (ja) * | 1972-09-22 | 1974-05-22 | ||
JPS5256869A (en) * | 1975-11-05 | 1977-05-10 | Toshiba Corp | Production of semiconductor element |
JPH07240474A (ja) * | 1994-02-25 | 1995-09-12 | Texas Instr Japan Ltd | 半導体装置の製造方法及びエッチング液 |
JPH11297656A (ja) * | 1998-04-14 | 1999-10-29 | Mitsubishi Electric Corp | 半導体装置の製造方法、リンス液、及び半導体基板洗浄液 |
JP2000164586A (ja) * | 1998-11-24 | 2000-06-16 | Daikin Ind Ltd | エッチング液 |
JP2000164585A (ja) * | 1998-11-24 | 2000-06-16 | Daikin Ind Ltd | エッチング液 |
JP2005268605A (ja) * | 2004-03-19 | 2005-09-29 | Daikin Ind Ltd | SiN膜の選択エッチング液及びエッチング方法 |
Family Cites Families (2)
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JP2003129089A (ja) * | 2001-10-24 | 2003-05-08 | Daikin Ind Ltd | 洗浄用組成物 |
TWI282814B (en) * | 2002-09-13 | 2007-06-21 | Daikin Ind Ltd | Etchant and etching method |
-
2006
- 2006-05-24 KR KR1020077029067A patent/KR100927080B1/ko active IP Right Grant
- 2006-05-24 JP JP2007517860A patent/JP5034942B2/ja not_active Expired - Fee Related
- 2006-05-24 CN CN2006800179123A patent/CN101180712B/zh not_active Expired - Fee Related
- 2006-05-24 WO PCT/JP2006/310343 patent/WO2006126583A1/ja active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS4952799A (ja) * | 1972-09-22 | 1974-05-22 | ||
JPS5256869A (en) * | 1975-11-05 | 1977-05-10 | Toshiba Corp | Production of semiconductor element |
JPH07240474A (ja) * | 1994-02-25 | 1995-09-12 | Texas Instr Japan Ltd | 半導体装置の製造方法及びエッチング液 |
JPH11297656A (ja) * | 1998-04-14 | 1999-10-29 | Mitsubishi Electric Corp | 半導体装置の製造方法、リンス液、及び半導体基板洗浄液 |
JP2000164586A (ja) * | 1998-11-24 | 2000-06-16 | Daikin Ind Ltd | エッチング液 |
JP2000164585A (ja) * | 1998-11-24 | 2000-06-16 | Daikin Ind Ltd | エッチング液 |
JP2005268605A (ja) * | 2004-03-19 | 2005-09-29 | Daikin Ind Ltd | SiN膜の選択エッチング液及びエッチング方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008172193A (ja) * | 2007-01-05 | 2008-07-24 | Hynix Semiconductor Inc | キャパシタのリーニング防止用食刻液組成物及びこれを用いたキャパシタ製造方法 |
KR100939770B1 (ko) | 2007-03-15 | 2010-01-29 | 주식회사 하이닉스반도체 | 웨이퍼 세정 방법 |
CN101499418B (zh) * | 2008-01-31 | 2012-08-15 | 大日本网屏制造株式会社 | 基板处理装置及其所使用的基板支撑构件 |
US8828877B2 (en) | 2009-05-25 | 2014-09-09 | Az Electronic Materials Usa Corp. | Etching solution and trench isolation structure-formation process employing the same |
Also Published As
Publication number | Publication date |
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CN101180712A (zh) | 2008-05-14 |
KR20080011229A (ko) | 2008-01-31 |
KR100927080B1 (ko) | 2009-11-13 |
JPWO2006126583A1 (ja) | 2008-12-25 |
CN101180712B (zh) | 2012-05-09 |
JP5034942B2 (ja) | 2012-09-26 |
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