WO2013136555A1 - 選択的エッチング方法 - Google Patents
選択的エッチング方法 Download PDFInfo
- Publication number
- WO2013136555A1 WO2013136555A1 PCT/JP2012/072301 JP2012072301W WO2013136555A1 WO 2013136555 A1 WO2013136555 A1 WO 2013136555A1 JP 2012072301 W JP2012072301 W JP 2012072301W WO 2013136555 A1 WO2013136555 A1 WO 2013136555A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nitride
- etching
- titanium
- metal
- etching solution
- Prior art date
Links
- 238000005530 etching Methods 0.000 title claims abstract description 240
- 238000000034 method Methods 0.000 title claims abstract description 37
- 229910052751 metal Inorganic materials 0.000 claims abstract description 88
- 239000002184 metal Substances 0.000 claims abstract description 88
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 76
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 69
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 69
- 239000010936 titanium Substances 0.000 claims abstract description 69
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 45
- 239000010703 silicon Substances 0.000 claims abstract description 45
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 38
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 38
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 38
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 claims abstract description 38
- -1 hafnium nitride Chemical class 0.000 claims abstract description 32
- 150000002739 metals Chemical class 0.000 claims abstract description 31
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 31
- 239000010955 niobium Substances 0.000 claims abstract description 31
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000008139 complexing agent Substances 0.000 claims abstract description 29
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 27
- 150000004767 nitrides Chemical class 0.000 claims abstract description 26
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 25
- 239000000956 alloy Substances 0.000 claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000011521 glass Substances 0.000 claims abstract description 25
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 23
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 23
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 23
- 239000011733 molybdenum Substances 0.000 claims abstract description 23
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 23
- 239000010948 rhodium Substances 0.000 claims abstract description 23
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 23
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 23
- 239000010937 tungsten Substances 0.000 claims abstract description 23
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 22
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052802 copper Inorganic materials 0.000 claims abstract description 18
- 239000010949 copper Substances 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 claims description 29
- 125000001931 aliphatic group Chemical group 0.000 claims description 16
- 125000004432 carbon atom Chemical group C* 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 14
- 239000007800 oxidant agent Substances 0.000 claims description 13
- 125000003118 aryl group Chemical group 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 10
- GVNVAWHJIKLAGL-UHFFFAOYSA-N 2-(cyclohexen-1-yl)cyclohexan-1-one Chemical compound O=C1CCCCC1C1=CCCCC1 GVNVAWHJIKLAGL-UHFFFAOYSA-N 0.000 claims description 9
- 101150065749 Churc1 gene Proteins 0.000 claims description 9
- 102100038239 Protein Churchill Human genes 0.000 claims description 9
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 8
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 57
- 238000012360 testing method Methods 0.000 description 53
- 239000000523 sample Substances 0.000 description 51
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 30
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 27
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 24
- 239000002585 base Substances 0.000 description 24
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium(II) oxide Chemical compound [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 24
- 229960005196 titanium dioxide Drugs 0.000 description 23
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 21
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000011156 evaluation Methods 0.000 description 14
- 238000004544 sputter deposition Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- YQUVCSBJEUQKSH-UHFFFAOYSA-N 3,4-dihydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C(O)=C1 YQUVCSBJEUQKSH-UHFFFAOYSA-N 0.000 description 10
- 238000005259 measurement Methods 0.000 description 10
- 238000003756 stirring Methods 0.000 description 10
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 8
- 229960004889 salicylic acid Drugs 0.000 description 8
- 235000015165 citric acid Nutrition 0.000 description 7
- 238000004090 dissolution Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 6
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 6
- 229910002601 GaN Inorganic materials 0.000 description 6
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 6
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 238000004626 scanning electron microscopy Methods 0.000 description 6
- 239000011975 tartaric acid Substances 0.000 description 6
- 235000002906 tartaric acid Nutrition 0.000 description 6
- 229910052783 alkali metal Inorganic materials 0.000 description 5
- 150000003863 ammonium salts Chemical class 0.000 description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 5
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 4
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 4
- 239000003446 ligand Substances 0.000 description 4
- BFRGSJVXBIWTCF-UHFFFAOYSA-N niobium monoxide Chemical compound [Nb]=O BFRGSJVXBIWTCF-UHFFFAOYSA-N 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- GLDQAMYCGOIJDV-UHFFFAOYSA-N 2,3-dihydroxybenzoic acid Chemical compound OC(=O)C1=CC=CC(O)=C1O GLDQAMYCGOIJDV-UHFFFAOYSA-N 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 229920000604 Polyethylene Glycol 200 Polymers 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 150000004696 coordination complex Chemical class 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910001195 gallium oxide Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910000484 niobium oxide Inorganic materials 0.000 description 3
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 description 3
- 239000001509 sodium citrate Substances 0.000 description 3
- 235000011006 sodium potassium tartrate Nutrition 0.000 description 3
- VOJUXHHACRXLTD-UHFFFAOYSA-N 1,4-dihydroxy-2-naphthoic acid Chemical compound C1=CC=CC2=C(O)C(C(=O)O)=CC(O)=C21 VOJUXHHACRXLTD-UHFFFAOYSA-N 0.000 description 2
- IBHWREHFNDMRPR-UHFFFAOYSA-N 2,4,6-Trihydroxybenzoic acid Chemical compound OC(=O)C1=C(O)C=C(O)C=C1O IBHWREHFNDMRPR-UHFFFAOYSA-N 0.000 description 2
- OYFRNYNHAZOYNF-UHFFFAOYSA-N 2,5-dihydroxyterephthalic acid Chemical compound OC(=O)C1=CC(O)=C(C(O)=O)C=C1O OYFRNYNHAZOYNF-UHFFFAOYSA-N 0.000 description 2
- IBGBGRVKPALMCQ-UHFFFAOYSA-N 3,4-dihydroxybenzaldehyde Chemical compound OC1=CC=C(C=O)C=C1O IBGBGRVKPALMCQ-UHFFFAOYSA-N 0.000 description 2
- ALRHLSYJTWAHJZ-UHFFFAOYSA-N 3-hydroxypropionic acid Chemical compound OCCC(O)=O ALRHLSYJTWAHJZ-UHFFFAOYSA-N 0.000 description 2
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- CFJRGWXELQQLSA-UHFFFAOYSA-N azanylidyneniobium Chemical compound [Nb]#N CFJRGWXELQQLSA-UHFFFAOYSA-N 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 238000000921 elemental analysis Methods 0.000 description 2
- KBPUBCVJHFXPOC-UHFFFAOYSA-N ethyl 3,4-dihydroxybenzoate Chemical compound CCOC(=O)C1=CC=C(O)C(O)=C1 KBPUBCVJHFXPOC-UHFFFAOYSA-N 0.000 description 2
- VFPFQHQNJCMNBZ-UHFFFAOYSA-N ethyl gallate Chemical compound CCOC(=O)C1=CC(O)=C(O)C(O)=C1 VFPFQHQNJCMNBZ-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 125000004356 hydroxy functional group Chemical group O* 0.000 description 2
- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 2
- HFLAMWCKUFHSAZ-UHFFFAOYSA-N niobium dioxide Chemical compound O=[Nb]=O HFLAMWCKUFHSAZ-UHFFFAOYSA-N 0.000 description 2
- PFXFCRMIBIQEEO-UHFFFAOYSA-N niobium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Nb+3].[Nb+3] PFXFCRMIBIQEEO-UHFFFAOYSA-N 0.000 description 2
- 230000000269 nucleophilic effect Effects 0.000 description 2
- 159000000001 potassium salts Chemical class 0.000 description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- 235000010215 titanium dioxide Nutrition 0.000 description 2
- GQUJEMVIKWQAEH-UHFFFAOYSA-N titanium(III) oxide Chemical compound O=[Ti]O[Ti]=O GQUJEMVIKWQAEH-UHFFFAOYSA-N 0.000 description 2
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- 150000005206 1,2-dihydroxybenzenes Chemical class 0.000 description 1
- 150000000180 1,2-diols Chemical class 0.000 description 1
- SJJCQDRGABAVBB-UHFFFAOYSA-N 1-hydroxy-2-naphthoic acid Chemical compound C1=CC=CC2=C(O)C(C(=O)O)=CC=C21 SJJCQDRGABAVBB-UHFFFAOYSA-N 0.000 description 1
- LNETULKMXZVUST-UHFFFAOYSA-N 1-naphthoic acid Chemical compound C1=CC=C2C(C(=O)O)=CC=CC2=C1 LNETULKMXZVUST-UHFFFAOYSA-N 0.000 description 1
- RWBRUCCWZPSBFC-UHFFFAOYSA-N 17-(1-hydroxyethyl)-10,13-dimethyl-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one Chemical compound C1CC2=CC(=O)CCC2(C)C2C1C1CCC(C(O)C)C1(C)CC2 RWBRUCCWZPSBFC-UHFFFAOYSA-N 0.000 description 1
- YBZAVRDNSPUMFK-UHFFFAOYSA-N 2, 6-Dihydroxy-4-methylbenzoic acid, Natural products CC1=CC(O)=C(C(O)=O)C(O)=C1 YBZAVRDNSPUMFK-UHFFFAOYSA-N 0.000 description 1
- 229940082044 2,3-dihydroxybenzoic acid Drugs 0.000 description 1
- XHPDHXXZBWDFIB-UHFFFAOYSA-N 2,3-dihydroxybenzonitrile Chemical compound OC1=CC=CC(C#N)=C1O XHPDHXXZBWDFIB-UHFFFAOYSA-N 0.000 description 1
- SWHSXWLSBBYLGM-UHFFFAOYSA-N 2-[(2-carboxyphenoxy)methoxy]benzoic acid Chemical compound OC(=O)C1=CC=CC=C1OCOC1=CC=CC=C1C(O)=O SWHSXWLSBBYLGM-UHFFFAOYSA-N 0.000 description 1
- GZJIQNJINXQYTG-UHFFFAOYSA-N 2-nitrooxybenzoic acid Chemical compound OC(=O)C1=CC=CC=C1O[N+]([O-])=O GZJIQNJINXQYTG-UHFFFAOYSA-N 0.000 description 1
- PCYGLFXKCBFGPC-UHFFFAOYSA-N 3,4-Dihydroxy hydroxymethyl benzene Natural products OCC1=CC=C(O)C(O)=C1 PCYGLFXKCBFGPC-UHFFFAOYSA-N 0.000 description 1
- JPBDMIWPTFDFEU-UHFFFAOYSA-N 3-bromobenzene-1,2-diol Chemical compound OC1=CC=CC(Br)=C1O JPBDMIWPTFDFEU-UHFFFAOYSA-N 0.000 description 1
- GQKDZDYQXPOXEM-UHFFFAOYSA-N 3-chlorocatechol Chemical compound OC1=CC=CC(Cl)=C1O GQKDZDYQXPOXEM-UHFFFAOYSA-N 0.000 description 1
- RDFQSFOGKVZWKF-UHFFFAOYSA-N 3-hydroxy-2,2-dimethylpropanoic acid Chemical compound OCC(C)(C)C(O)=O RDFQSFOGKVZWKF-UHFFFAOYSA-N 0.000 description 1
- HUMAHCJCCNMIGP-UHFFFAOYSA-N 3-iodobenzene-1,2-diol Chemical compound OC1=CC=CC(I)=C1O HUMAHCJCCNMIGP-UHFFFAOYSA-N 0.000 description 1
- YHKWFDPEASWKFQ-UHFFFAOYSA-N 3-nitrobenzene-1,2-diol Chemical compound OC1=CC=CC([N+]([O-])=O)=C1O YHKWFDPEASWKFQ-UHFFFAOYSA-N 0.000 description 1
- SJZRECIVHVDYJC-UHFFFAOYSA-N 4-hydroxybutyric acid Chemical compound OCCCC(O)=O SJZRECIVHVDYJC-UHFFFAOYSA-N 0.000 description 1
- ZBCATMYQYDCTIZ-UHFFFAOYSA-N 4-methylcatechol Chemical compound CC1=CC=C(O)C(O)=C1 ZBCATMYQYDCTIZ-UHFFFAOYSA-N 0.000 description 1
- XESZUVZBAMCAEJ-UHFFFAOYSA-N 4-tert-butylcatechol Chemical compound CC(C)(C)C1=CC=C(O)C(O)=C1 XESZUVZBAMCAEJ-UHFFFAOYSA-N 0.000 description 1
- NKBASRXWGAGQDP-UHFFFAOYSA-N 5-chlorosalicylic acid Chemical compound OC(=O)C1=CC(Cl)=CC=C1O NKBASRXWGAGQDP-UHFFFAOYSA-N 0.000 description 1
- YCPXWRQRBFJBPZ-UHFFFAOYSA-N 5-sulfosalicylic acid Chemical compound OC(=O)C1=CC(S(O)(=O)=O)=CC=C1O YCPXWRQRBFJBPZ-UHFFFAOYSA-N 0.000 description 1
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RGCKGOZRHPZPFP-UHFFFAOYSA-N Alizarin Natural products C1=CC=C2C(=O)C3=C(O)C(O)=CC=C3C(=O)C2=C1 RGCKGOZRHPZPFP-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 101100167062 Caenorhabditis elegans chch-3 gene Proteins 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
- 239000004262 Ethyl gallate Substances 0.000 description 1
- YIKYNHJUKRTCJL-UHFFFAOYSA-N Ethyl maltol Chemical compound CCC=1OC=CC(=O)C=1O YIKYNHJUKRTCJL-UHFFFAOYSA-N 0.000 description 1
- DSLZVSRJTYRBFB-UHFFFAOYSA-N Galactaric acid Natural products OC(=O)C(O)C(O)C(O)C(O)C(O)=O DSLZVSRJTYRBFB-UHFFFAOYSA-N 0.000 description 1
- IAJILQKETJEXLJ-UHFFFAOYSA-N Galacturonsaeure Natural products O=CC(O)C(O)C(O)C(O)C(O)=O IAJILQKETJEXLJ-UHFFFAOYSA-N 0.000 description 1
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 1
- 229910013504 M-O-M Inorganic materials 0.000 description 1
- PYPQFOINVKFSJD-UHFFFAOYSA-N S[S] Chemical compound S[S] PYPQFOINVKFSJD-UHFFFAOYSA-N 0.000 description 1
- ABBQHOQBGMUPJH-UHFFFAOYSA-M Sodium salicylate Chemical compound [Na+].OC1=CC=CC=C1C([O-])=O ABBQHOQBGMUPJH-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- QNHQEUFMIKRNTB-UHFFFAOYSA-N aesculetin Natural products C1CC(=O)OC2=C1C=C(O)C(O)=C2 QNHQEUFMIKRNTB-UHFFFAOYSA-N 0.000 description 1
- GUAFOGOEJLSQBT-UHFFFAOYSA-N aesculetin dimethyl ether Natural products C1=CC(=O)OC2=C1C=C(OC)C(OC)=C2 GUAFOGOEJLSQBT-UHFFFAOYSA-N 0.000 description 1
- IAJILQKETJEXLJ-RSJOWCBRSA-N aldehydo-D-galacturonic acid Chemical compound O=C[C@H](O)[C@@H](O)[C@@H](O)[C@H](O)C(O)=O IAJILQKETJEXLJ-RSJOWCBRSA-N 0.000 description 1
- HFVAFDPGUJEFBQ-UHFFFAOYSA-M alizarin red S Chemical compound [Na+].O=C1C2=CC=CC=C2C(=O)C2=C1C=C(S([O-])(=O)=O)C(O)=C2O HFVAFDPGUJEFBQ-UHFFFAOYSA-M 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- AXFYFNCPONWUHW-UHFFFAOYSA-N beta-hydroxy-beta-methyl butyric acid Natural products CC(C)(O)CC(O)=O AXFYFNCPONWUHW-UHFFFAOYSA-N 0.000 description 1
- UIAFKZKHHVMJGS-UHFFFAOYSA-N beta-resorcylic acid Natural products OC(=O)C1=CC=C(O)C=C1O UIAFKZKHHVMJGS-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 235000012745 brilliant blue FCF Nutrition 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- ILEDWLMCKZNDJK-UHFFFAOYSA-N esculetin Chemical compound C1=CC(=O)OC2=C1C=C(O)C(O)=C2 ILEDWLMCKZNDJK-UHFFFAOYSA-N 0.000 description 1
- 235000019277 ethyl gallate Nutrition 0.000 description 1
- 229940093503 ethyl maltol Drugs 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- DSLZVSRJTYRBFB-DUHBMQHGSA-N galactaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)[C@@H](O)[C@H](O)C(O)=O DSLZVSRJTYRBFB-DUHBMQHGSA-N 0.000 description 1
- 229940074391 gallic acid Drugs 0.000 description 1
- 235000004515 gallic acid Nutrition 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229940074439 potassium sodium tartrate Drugs 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- HWEYZGSCHQNNEH-UHFFFAOYSA-N silicon tantalum Chemical compound [Si].[Ta] HWEYZGSCHQNNEH-UHFFFAOYSA-N 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 229960004025 sodium salicylate Drugs 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 125000002813 thiocarbonyl group Chemical group *C(*)=S 0.000 description 1
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 1
- 229940038773 trisodium citrate Drugs 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K13/00—Etching, surface-brightening or pickling compositions
- C09K13/02—Etching, surface-brightening or pickling compositions containing an alkali metal hydroxide
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/06—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals
- C03C17/09—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals by deposition from the vapour phase
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/02—Local etching
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/30—Acidic compositions for etching other metallic material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/32—Alkaline compositions
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/32—Alkaline compositions
- C23F1/36—Alkaline compositions for etching aluminium or alloys thereof
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/32—Alkaline compositions
- C23F1/38—Alkaline compositions for etching refractory metals
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/32—Alkaline compositions
- C23F1/40—Alkaline compositions for etching other metallic material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
- C03C2217/25—Metals
- C03C2217/257—Refractory metals
- C03C2217/258—Ti, Zr, Hf
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
- C03C2217/25—Metals
- C03C2217/257—Refractory metals
- C03C2217/259—V, Nb, Ta
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/15—Deposition methods from the vapour phase
- C03C2218/154—Deposition methods from the vapour phase by sputtering
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/32—After-treatment
- C03C2218/328—Partly or completely removing a coating
- C03C2218/33—Partly or completely removing a coating by etching
Definitions
- the present invention provides a metal selected from titanium, niobium, tungsten, molybdenum, ruthenium, rhodium, arsenic, aluminum and gallium provided on the base substrate preferentially to the base substrate selected from glass, silicon, copper and nickel. And a method of selectively etching a layer of the metal oxide, the metal nitride, silicon nitride, hafnium nitride, tantalum nitride or their alloys.
- Patent Document 1 a method using EDTA as a complexing agent is known as a titanium etching solution, and specifically, a method using EDTA and hydrogen peroxide and using an alkaline etching solution is known (Patent Document 1).
- this method can selectively etch titanium deposited on lithium niobate (LiNbO 3 ), it has a problem that the etching rate is slow. In addition, this method may cause a substance (metal) which can not be etched, or may affect the base depending on the type of base substrate. For example, since the etching rate of titanium is slower than the etching rate of nickel, the underlayer is dissolved first.
- An object of the present invention is to provide a method of selectively etching not only titanium but also other metals at a practical speed and preferentially to a base substrate.
- an etching solution containing a specific complexing agent and being alkaline is more than a base substrate selected from glass, silicon, copper and nickel.
- a base substrate selected from glass, silicon, copper and nickel.
- metals selected from titanium, niobium, tungsten, molybdenum, ruthenium, rhodium, arsenic, aluminum and gallium, oxides of the metals, nitrides of the metals, silicon nitride, hafnium nitride, tantalum nitride or alloys thereof
- selective etching can be performed and complete the present invention.
- the present invention provides a metal selected from titanium, niobium, tungsten, molybdenum, ruthenium, rhodium, arsenic, aluminum and gallium provided on a base substrate selected from glass, silicon, copper and nickel, an oxide of the metal, Layers of the above metal nitrides, silicon nitrides, hafnium nitrides, tantalum nitrides, or alloys thereof, are represented by the following formulas (I) and (II), [In formula (I), R 1 to R 3 may be the same as or different from each other, and -R a , -OR b , -OOR c , -COOR d , -COOOR e , -CH 2 COOR f , -CH 2 COOOR g , -CR h O or -CH 2 CHCH 3 (R a to R h may be the same or different, and hydrogen, a saturated aliphatic group having 1
- R 1 to R 3 may be the same as or different from each other, and -R a , -OR b , -OOR c , -COOR d , -COOOR e , -CH 2 COOR f , -CH 2 COOOR g , -CR h O or -CH 2 CHCH 3
- R a to R h may be the same or different, and hydrogen, a saturated aliphatic group having 1 to 10 carbon atoms, or 1 to 10 carbon atoms
- Unsaturated aliphatic or aryl group of [In the formula (II), R 4 to R 7 may be the same as or different from each other, and -R i , -OR j , -OOR k , -COOR l , -COOOR m , -CH 2 COOR n , -CH 2 CO
- the present invention is selected from titanium, niobium, tungsten, molybdenum, ruthenium, rhodium, arsenic, aluminum and gallium at a practical speed and preferentially over the base substrate selected from glass, silicon, copper and nickel.
- Metals, oxides of the metals, nitrides of the metals, silicon nitride, hafnium nitride, tantalum nitride or alloys thereof can be selectively etched.
- the present invention is also capable of reusing the base substrate selected from glass, silicon, copper and nickel, the metal, the metal, the oxide of the metal, the nitride of the metal, silicon nitride, hafnium nitride It can also be used to recover tantalum nitride or alloys of these.
- FIG. 1 is an external appearance photograph of the sample after etching on 80 degreeC and the etching conditions for 30 seconds using the etching liquid of Example 6.
- FIG. SPM photographs and Ra values of samples after etching at 80 ° C. for 5 minutes using the etching solution of Example 6 in Test Example 4 ((A) in the figure is the surface of sample A, (B) is the surface of sample B, (C) is the surface after etching of sample B, and (D) is the surface after etching of sample A).
- the SEM photograph (upper) and SPM photograph (lower) of the sample after etching on the etching conditions of 80 degreeC and 40 minutes using the etching liquid of Example 6 in Experiment 5 are (a sample in a figure is a sample.
- (A), (B) is the surface of sample B
- (C) is the surface after etching of sample B).
- the SEM photograph (top) and the SPM photograph (bottom) of the sample after etching under the etching conditions of 80 ° C. and 25 seconds using the etching solution of Example 6 in Test Example 6 (in FIG. (A), (B) is the surface of sample B, (C) is the surface after etching of sample B).
- the selective etching method (hereinafter simply referred to as “the method of the present invention”) is titanium, niobium, tungsten, molybdenum, ruthenium, rhodium, arsenic, provided on a base substrate selected from glass, silicon, copper and nickel.
- a layer of a metal selected from aluminum and gallium, an oxide of the metal, a nitride of the metal, silicon nitride, hafnium nitride, tantalum nitride or an alloy thereof is represented by the following formulas (I) and (II), And one or more complexing agents selected from the compounds represented by the formula (1) and (2) by contacting with an etching solution which is alkaline.
- “consisting essentially of” is a substance other than the substance described as essentially containing but does not include a substance that affects the effect (in other words, it does not include it) (A substance that does not affect the effect may be included), and preferably contains no substance other than the substance described as essentially containing (in other words, only the substance described as essentially containing) Means including).
- R 1 to R 3 of the compound represented by the formula (I) may be the same or different, and -R a , -OR b , -OOR c , -COOR d , -COOOR e , -CH 2 COOR f , -CH 2 COOOR g , -CR h O or -CH 2 CHCH 3 (where R a to R h may be the same or different, respectively, hydrogen, carbon number It is a saturated aliphatic group of 1 to 10, an unsaturated aliphatic group having 1 to 10 carbon atoms, or an aryl group), preferably -H, -OH, -COOH or -CH 2 COOH.
- the compound represented by the formula (I) include 3-hydroxypropionic acid, tartaric acid, citric acid, malic acid, malonic acid, galacturonic acid, galactaric acid, gluconic acid, hydroxybutyric acid, 2,2-bis (hydroxy) And methyl) butyric acid, hydroxypivalic acid, ⁇ -hydroxyisovaleric acid and the like, and among these, tartaric acid or citric acid is preferable.
- the compounds represented by the formula (I) include those in the form of alkali metal salts such as lithium salts, sodium salts, potassium salts and the like and ammonium salts, which behave in the same manner as the above compounds in the etching solution. Be
- R 4 to R 7 of the compound represented by the formula (II) may be the same or different, and -R i , -OR j , -OOR k , -COOR l, -COOOR m, -CH 2 COOR n, -CH 2 COOOR o, -CR p O, -CH 2 CHCH 3, -CN, -NC, -NO 2, -F, -Cl, -Br, -I and -SO 2 R q (R i to R q may be the same or different, and hydrogen, a saturated aliphatic group having 1 to 10 carbon atoms, an unsaturated aliphatic group having 1 to 10 carbon atoms Or an aryl group), preferably -H, -COOH, -CH 2 COOH.
- X is -OH, -COOH or -COOOH, preferably -OH or -COOH.
- Specific examples of the compound represented by the formula (II) include protocatechuic acid, ethyl protocatechuate, salicylic acid, 2,3-dihydroxybenzoic acid, 5-chlorosalicylic acid, cresotine acid, resorcylic acid, naphthoic acid, 3,5-dihydroxy acid -2-naphthoic acid, 1,4-dihydroxy-2-naphthoic acid, 1-hydroxy-2-naphthoic acid, 2,6-dihydroxy-4-methylbenzoic acid, 2,5-dihydroxyterephthalic acid, methylene disalicylic acid, Nitrosalicylic acid, 2,4,6-trihydroxybenzoic acid, 5-sulphosalicylic acid, modal blue 1, chromium yellow, 4-tert-butylcatechol, 4-methylcatechol, catechol, bromocatechol, chlorocatechol, iodocatechol, fluoro Catechol, nitrocatechol, cyanocatechol And al
- the content of the complexing agent in the etching solution is 0.001 mol / L or more, preferably 0.1 to 1 mol / L.
- the liquid property of the etching solution used in the method of the present invention is not particularly limited as long as it is alkaline, but the etching rate is improved as the pH of the etching solution is higher, preferably pH 9 or more, more preferably pH 10 to 14, particularly preferably The pH is adjusted to 11-14, more particularly to 12-14.
- the method of making the etching solution alkaline is not particularly limited, and an alkaline substance such as sodium hydroxide or potassium hydroxide may be used.
- the etchant used in the method of the present invention preferably further contains an oxidizing agent.
- the etching rate is improved by containing the oxidizing agent in the etching solution.
- the type of oxidizing agent is not particularly limited, but it is preferable that the oxidizing agent itself does not corrode the underlying substrate.
- oxidizing agents that do not corrode such underlying substrates include, for example, oxygen, hydrogen peroxide, ozone, percarboxylic acids such as peracetic acid, peracetic acid and the like, and among these oxidizing agents by-products are included.
- oxygen, hydrogen peroxide and ozone which are not generated.
- the content of the oxidizing agent in the etching solution is 0.001 to 10% by mass (hereinafter simply referred to as "%"), preferably 0.1 to 3%.
- the oxidizing agent is a gas such as oxygen or ozone, the gas may be introduced by bubbling or the like so that the concentration in the etching solution is in the above range.
- a surfactant that is usually used in the etching solution may be added as long as the effects of the present invention are not impaired.
- the addition of the surfactant improves the uniformity of etching.
- Preferred surfactants include liquid polyethylene glycols such as PEG-200.
- a preferred example of the etching solution used in the method of the present invention is one which essentially contains the above-mentioned complexing agent and is alkaline.
- etching solution used in the method of the present invention one containing the above-mentioned complexing agent and oxidizing agent essentially and being alkaline can be mentioned.
- etching solution used in the method of the present invention one containing the above-mentioned complexing agent, oxidizing agent and surfactant essentially and being alkaline can be mentioned.
- 0.1 to 0.4 mol / L of salicylic acid or its alkali metal salt or ammonium salt and / or 0.1-0.4 mol / L of tartaric acid or its alkali metal salt or ammonium salt and / or 0.1 to 0.4 mol / L of citric acid or its alkali metal salt or ammonium salt Contains 0.3 to 3% hydrogen peroxide, pH 11 or more, preferably pH 12 to 14, more preferably pH 13 to 14,
- Sodium salicylate 0.1 to 0.4 mol / L and potassium sodium tartrate (Rochelle salt) 0.1 to 0.4 mol / L and trisodium citrate 0.1 to 0.4 mol / L and sodium hydroxide 0.1 to 0.4 mol / L and 0.3 to 3% hydrogen peroxide, And those containing
- specific examples of these alloys include titanium, titanium (II) oxide, titanium (III) oxide, titanium (IV) oxide, titanium nitride, niobium, niobium (II) oxide, niobium (III) oxide, niobium oxide IV) niobium oxide (V), niobium nitride, tungsten, molybdenum, ruthenium, rhodium, arsenic, aluminum, aluminum oxide, aluminum nitride, gallium, gallium oxide, gallium nitride, silicon nitride, hafnium nit
- examples of glass include silicate glass, quartz, pyrex, tempax, soda lime glass, borosilicate glass, etc.
- silicon single crystal silicon, boron added silicon Phosphorus-added silicon, arsenic-added silicon, antimony-added silicon, polycrystalline silicon and the like can be mentioned, copper includes pure copper metal, copper-containing alloy and the like, and nickel includes pure nickel metal, nickel-containing alloy and the like.
- the base substrate is a metal selected from titanium, niobium, tungsten, molybdenum, ruthenium, rhodium, arsenic, aluminum and gallium to be etched, an oxide of the metal, a nitride of the metal, silicon nitride, hafnium nitride , Tantalum nitride or those containing these alloys are excluded.
- the shape of the said base material is not specifically limited, Any, such as plate shape, cyclic
- a metal selected from titanium, niobium, tungsten, molybdenum, ruthenium, rhodium, arsenic, aluminum and gallium, an oxide of the metal, a nitride of the metal, silicon nitride, hafnium nitride, tantalum nitride or the like
- the method for providing the layer of these alloys is not particularly limited, and may be provided by generally used sputtering, vapor deposition, plating or the like.
- the method of bringing the etching solution into contact with the layer of these alloys is not particularly limited. For example, a method of immersing the base substrate provided with the layer in the etching solution, a method of spraying the etching solution onto the layer, The method etc. which apply
- the etching conditions in the method of the present invention are not particularly limited.
- the temperature of the etching solution is 20 to 100 ° C., preferably 40 to 80 ° C.
- the treatment time is 0.1 to 200 minutes, preferably 1 to 20 minutes.
- the person skilled in the art can appropriately determine the etching rate depending on the concentration of the compounds represented by the formulas (I) and (II) contained in the etching solution, the pH of the etching solution, and the solution temperature and processing time It can control.
- etching solution it is preferable to stir the etching solution with a stirrer, bubbling or the like at the time of etching.
- a stirrer By stirring, the uniformity of etching is improved, and reattachment to the underlying substrate such as the etched metal does not occur.
- the above-mentioned method of the present invention is a metal selected from titanium, niobium, tungsten, molybdenum, ruthenium, rhodium, arsenic, aluminum and gallium from the base substrate selected from glass, silicon, copper and nickel as described above, the metal Layers of the above oxides, nitrides of the aforementioned metals, silicon nitride, hafnium nitride, tantalum nitride or their alloys are preferentially dissolved over the underlying substrate, and therefore can be selectively removed.
- Base substrate Glass titanium and / or niobium and / or respective oxides and / or nitrides nickel titanium and / or titanium oxide and / or titanium nitride and / or silicon nitride silicon tantalum nitride and / or titanium and / or titanium nitride and And / or titanium oxide and / or aluminum and / or aluminum oxide and / or aluminum nitride and / or gallium and / or gallium oxide and / or gallium copper and aluminum nitride and / or aluminum nitride and / or gallium and / or gallium and / or Or gallium nitride
- Example 1 Etching solution: In 100 ml of water, 1.54 g of protocatechuic acid and 1.2 g of sodium hydroxide were dissolved. The pH of this etching solution was 14.
- Example 2 Etching solution: In 100 ml of water, 1.92 g of citric acid and 1.2 g of sodium hydroxide were dissolved. The pH of this etching solution was 14.
- Example 3 Etching solution: In 100 ml of water were dissolved 1.38 g of salicylic acid, 1 ml of hydrogen peroxide (30%) and 0.8 g of sodium hydroxide. The pH of this etching solution was 14.
- Example 4 Etching solution: In 100 ml of water were dissolved 1.50 g of tartaric acid, 1 ml of hydrogen peroxide (30%) and 1.2 g of sodium hydroxide. The pH of this etching solution was 14.
- Example 5 Etching solution: In 100 ml of water, 1.92 g of citric acid, 1 ml of hydrogen peroxide (30%) and 1.6 g of sodium hydroxide were dissolved. The pH of this etching solution was 14.
- Example 6 Etching solution: In 300 ml of water were dissolved 1.38 g of salicylic acid, 1.50 g of tartaric acid, 1.92 g of citric acid, 3 ml of hydrogen peroxide (30%) and 3.6 g of sodium hydroxide. The pH of this etching solution was 14.
- Comparative example 1 Etching solution: In 100 ml of water, 1 ml of hydrogen peroxide (30%) and 1.2 g of sodium hydroxide were dissolved. The pH of this etching solution was 14.
- Comparative example 2 Etching solution: In 100 ml of water, 4.16 g of EDTA ⁇ 4Na, 1 ml of hydrogen peroxide (30%) and 0.4 g of sodium hydroxide were dissolved. The pH of this etching solution was 14.
- Comparative example 3 Etching solution: In 100 ml of water were dissolved 1.38 g of salicylic acid, 1 ml of hydrogen peroxide (30%) and 0.4 g of sodium hydroxide. The pH of this etching solution was 5.
- Comparative example 4 Etching solution: In 100 ml of water were dissolved 1.4 g of ethyl maltol and 0.8 g of sodium hydroxide. The pH of this etching solution was 14.
- Comparative example 7 Etching solution: In 100 ml of water were dissolved 1.76 g of ascorbic acid, 1 ml of hydrogen peroxide (30%) and 1.2 g of sodium hydroxide. The pH of this etching solution was 14.
- Test example 1 Etching test: A sample in which titanium was deposited to a thickness of 100 nm by sputtering on the inner surface of a glass cylinder was used as a sample. While stirring the etching solutions prepared in Examples 1 to 6 and Comparative Examples 1 to 8 with a stirrer, the samples were immersed under the conditions described in Table 1 to conduct an etching test. The appearance of the sample after the etching test was evaluated by the following evaluation criteria. The results are also shown in Table 1. Moreover, the external appearance photograph of the sample after etching on 80 degreeC and the etching conditions for 30 seconds using the etching liquid of Example 6 was shown in FIG.
- protocatechuic acid is the best when hydrogen peroxide is not added to the etching solution of the present invention only by the complexing agent. It was also found that when the complexing agent and hydrogen peroxide were combined, the etching rate was improved and was faster than when EDTA was used. Furthermore, it was found that high pH is required for etching. Furthermore, among the 1,2-diols, general ones are not etched at all or hardly etched, but 1,2-benzenediols contained in the formula (II) are It turned out to be effective. Furthermore, it has been found that etching is not performed at all with the general titanium complexing agents ⁇ -diketones and ⁇ -hydroxy ketones. Moreover, it turned out that etching is not performed at all with the reducing agent complexing agent.
- Test example 2 Etching test: 10 nm titanium oxide, 70 nm titanium, 45 nm silicon nitride, 85 nm titanium nitride, 80 nm silicon nitride and 10 nm titanium nitride by sputtering with nickel plated on both sides of a hairlined brass ring What was deposited in this order was used as a sample. While stirring the etching solutions prepared in Examples 1 and 3 to 6 and Comparative Examples 1 to 3 and 6 to 8 with a stirrer, the samples were immersed under the conditions described in Table 2 to conduct an etching test. The appearance of the sample after the etching test was evaluated by the following evaluation criteria. The results are also shown in Table 2. Moreover, about the sample after etching on 80 degreeC and the etching condition for 5 minutes using the etching liquid of Example 6, it analyzed by the electron beam microanalyzer (EPMA).
- EPMA electron beam microanalyzer
- the etching solution of the present invention dissolves titanium oxide, titanium, silicon nitride and titanium nitride preferentially over the underlying nickel, these can be selectively removed from the underlying nickel.
- EPMA 64.0 mol% to 74.2 mol% of nickel, 6.0 mol% to 16.4 mol% of copper, 3.4 mol% to 9.4 mol% of zinc, and titanium before and after etching. It turned out that 11.6 mol% to 0 mol% and silicon became 15.0 mol% to 0 mol%, and all titanium and silicon were removed by etching.
- Test example 3 Etching test: A sample was prepared by depositing 50 ⁇ m of tantalum nitride on one side of a silicon wafer by sputtering. While stirring the etching solutions prepared in Examples 1 and 3 to 6 and Comparative Examples 1 to 3 with a stirrer, the samples were immersed under the conditions described in Table 3 to conduct etching tests. The appearance of the sample after the etching test was evaluated by the following evaluation criteria. The results are also shown in Table 3.
- the etching solution of the present invention dissolves tantalum nitride preferentially over the underlying silicon, it can be selectively removed from the underlying silicon.
- Test example 4 Etching test Sample A coated with nickel on one side of a brass plate is sample A with 10 nm of titanium oxide, 70 nm of titanium, 45 nm of silicon nitride, 85 nm of titanium nitride, 80 nm of silicon nitride and 10 nm of titanium nitride.
- Sample B was deposited in the following manner. Samples A and B were immersed in the etching solution prepared in Example 6 at 80 ° C. for 5 minutes while being stirred with a stirrer, and an etching test was performed. The surface shape and surface roughness (Ra value) of the sample before and after the etching test were observed by a scanning probe microscope (SPM). The results are shown in FIG.
- the etching solution of the present invention dissolves titanium oxide, titanium, silicon nitride and titanium nitride preferentially over the underlying nickel, so that they can be selectively removed from the underlying nickel I understand.
- Test example 5 Etching test A sample B was prepared by depositing 50 ⁇ m of tantalum nitride on one surface of a silicon wafer (sample A) by sputtering. The sample B was immersed under the conditions of 80 ° C. and 40 minutes while stirring the etching solution prepared in Example 6 with a stirrer, and the sample subjected to the etching test was designated as a sample C. These samples were observed by scanning electron microscopy (SEM) and SPM. The results are shown in FIG.
- Test example 6 Etching test A sample B was prepared by depositing titanium nitride and titanium oxide by 50 ⁇ m in this order on one surface of a silicon wafer (sample A) by sputtering. The sample B was immersed under the conditions of 80 ° C. and 25 seconds while stirring the etching solution prepared in Example 6 with a stirrer, and the sample subjected to the etching test was designated as a sample C. These samples were observed by SEM and SPM. The results are shown in FIG.
- Test example 7 Selection of etching conditions:
- the etching solution contains 0.334 mol / L of salicylic acid, 0.333 mol / L of tartaric acid, 0.333 mol / L of citric acid and 1 mol / L of hydrogen peroxide, and the pH is adjusted to 11 or more with sodium hydroxide. As a composition, this was diluted as described in Table 4 below to prepare an etching solution.
- the (ring) was etched.
- the etching end time is the time until the sputtered film is removed visually.
- Test example 8 Elemental analysis of the etching solution after use: Using the etching solution of Example 6, a sample (glass cylinder) similar to that used in Test Example 1 at 80 ° C. for 30 seconds, and a sample (ring) similar to that used in Test Example 2 at 80 ° C. The etching solution after etching for 25 seconds at 80 ° C. using ICP-AES for the same sample as that used in Test Example 6 (the titanium nitride and titanium oxide deposited on the silicon wafer (Sample B)). Analysis was carried out. Further, as a comparison, using the etching solution of Comparative Example 2, an elemental analysis was performed also on the etching solution after etching the same sample. The results of these analyzes are shown in Table 5.
- titanium dissolves preferentially over nickel and silicon as compared with the conventional one.
- titanium was 5 mg / L while silicon was 36.1 mg / L and nickel was not detected.
- 23.5 mg / L of silicon and 8.5 mg / L of nickel have been conventionally used as compared with 1 mg / L of titanium.
- Excess silicon is considered to be dissolved from the silicon wafer substrate and nickel from the nickel plated substrate, as compared to the amount of conventional titanium. It has been found that the complexing agent used in the present invention is selective for the dissolution of titanium and nitride.
- Test example 9 Measurement of etching rate: (1) Measurement of etching rate of titanium The etching rate of titanium is as follows: 100 nm of titanium is deposited on a glass by sputtering, and the etching solution described in Table 6 is immersed in 80 ° C. while being stirred by a stirrer. The etching time was calculated from the amount of titanium dissolved and the contact area to the etching solution. The results are shown in Table 6.
- the etching rate of titanium oxide / titanium nitride is such that titanium oxide and titanium nitride are respectively deposited in the order of 50 nm by sputtering on a silicon wafer, and etching shown in Table 7
- the solution was immersed in the solution at 80 ° C. while being stirred with a stirrer, and the etching time was calculated from the amount of dissolved titanium oxide / titanium nitride and the contact area to the etching solution. The results are shown in Table 7.
- etching rate of niobium is as follows: Niobium is deposited to 200 nm by sputtering on glass, and the etching solution described in Table 8 is immersed in 80 ° C. while being stirred by a stirrer. The etching time was calculated from the amount of niobium dissolved and the contact area with the etching solution. The results are shown in Table 8.
- the etching rate of tantalum nitride was such that 50 nm of tantalum nitride was deposited on a silicon wafer by sputtering and the etchant described in Table 9 was stirred at 80 ° C. with a stirrer. And the amount of tantalum nitride dissolved, and the contact area to the etching solution. The results are shown in Table 9.
- Test example 10 Measurement of etching rate: (1) Measurement of etching rate of glass The etching rate of glass is immersed in the one obtained at 80 ° C. while stirring the etching solution described in Table 10 with a stirrer, the etching time, the amount of dissolved glass, and the plate glass It was calculated from the weight difference before and after etching with respect to the contact area to the etching solution. The results are shown in Table 10.
- the etching solution of the present invention had a lower etching rate of glass, silicon and nickel as an underlying substrate than that of titanium, titanium oxide, titanium nitride, niobium and tantalum nitride. .
- the etching solution of the present invention dissolves titanium, titanium oxide, titanium nitride, niobium and tantalum nitride preferentially to the base substrate.
- the etching solution using EDTA had an overwhelmingly higher etching rate of the underlying substrate than the etching solution of the present invention.
- Test example 11 Etching test When a strip of the gallium arsenide wafer was immersed in the etching solution prepared in Example 6 at 80 ° C., the gallium arsenide pieces dissolved soon afterward. From this result, it was found that the etching solution of the present invention can selectively etch arsenic, gallium and gallium arsenide as well as titanium and the like.
- Test example 12 Etching test: When a specimen of tungsten, molybdenum, ruthenium or rhodium is immersed in the one prepared at 80 ° C. as the etching solution prepared in Example 6, it dissolves soon. From this, the etching solution of the present invention can selectively etch tungsten, molybdenum, ruthenium or rhodium as well as titanium and the like.
- Test example 13 Reuse test: 10 nm titanium oxide, 70 nm titanium, 45 nm silicon nitride, 85 nm titanium nitride, 80 nm silicon nitride and 10 nm titanium nitride by sputtering with nickel plated on both sides of a hairlined brass ring What was deposited in this order was used as a sample. The sample was immersed for 5 minutes in an etchant prepared in Example 6 at 80 ° C. to completely etch titanium oxide, titanium, silicon nitride and titanium nitride deposited by sputtering. Thereafter, the sample was dried, and the same sputtering as described above was repeated to obtain the same appearance as the sample before etching. This test showed that it is possible to reuse the sample.
- Example 7 Etching solution: In 1000 ml of water, 23 g of salicylic acid, 47 g of Rochelle salt, 43 g of sodium citrate, PEG-200 1 ml, 50 ml of hydrogen peroxide (34%) and 10 g of sodium hydroxide were dissolved. The pH of this etching solution was 12.7.
- Test example 14 Etching test The pH of the etching solution prepared in Example 7 was adjusted to the pH described in Table 13 using sodium hydroxide or sulfuric acid. A sample (glass cylinder) similar to that used in Test Example 1 and a sample (ring) similar to that used in Test Example 2 were immersed in the respective etching solutions at 50 ° C., and the sputtered film was visually observed. The time until complete removal was measured. The results are shown in Table 13.
- Example 8 Etching solution: In 1000 ml of water were dissolved 129 g of sodium citrate, 0.10 ml of PEG-200, and 50 ml of hydrogen peroxide (34%). The pH of this etching solution was 13.
- Test example 15 Etching test: The etching rate was measured in the same manner as in Test Example 10 by immersing a 5.times.5.times.0.1 cm aluminum plate or copper plate in an etching solution adjusted at 50.degree. C. prepared in the eighth example. It was found that the etching rate of the aluminum plate was 130 nm / s, and the etching rate of the copper plate was 0.142 nm / s.
- Test example 16 Etching test: When a test piece of aluminum oxide was dipped in the etching solution prepared in Example 8 at 60 ° C., it was dissolved soon. From this result, it was found that the etching solution of the present invention can selectively etch aluminum oxide as well as titanium and the like.
- Test example 17 Etching test: A specimen prepared by sputtering aluminum nitride and gallium nitride in this order and immersing them in a silicon wafer was immersed in the etching solution prepared in Example 8 at 60 ° C., and a layer of aluminum nitride and gallium nitride was nearly lost. It dissolved. From this result, it was found that the etching solution of the present invention can selectively etch aluminum nitride or gallium nitride as well as titanium and the like.
- the principle of etching in the method of the present invention described above is presumed as follows.
- Role of complexing agent The selected complexing agent chelates the metal on the surface to make the surface metal susceptible to (a) nucleophilic attack and (b) the formed metal complex to be easily dissolved in the etching solution. That is, the ligand of the selected complexing agent is selectively chelated to a metal (eg, titanium, niobium, etc.) compatible with the shape, orbital arrangement, and electronic properties of the metal atom to be etched, and thus only a specific metal is selected. It becomes possible to etch.
- a metal eg, titanium, niobium, etc.
- the complexing agent selected in the present invention is one factor that specifies the selectivity of the metal to be etched.
- the complexing ability and selectivity of the complexing agent are determined by the coordination number of the complexing agent, coordination species (nitrogen (eg, nitrogen contained in amine, nitrile), oxygen (eg, hydroxy, carboxylic acid, carbonyl) And sulfur (eg, mercapto, sulfur contained in thiocarbonyl), coordination characteristics, electronic characteristics, ligand-ligand distance / arrangement in the case of multiple coordination numbers, and Ru.
- molecules having two or three oxygen coordinations separated by three carbons one having hydroxy and one having carboxylic acid or benzenediol are considered optimal.
- Other coordination species in the three cases is also preferably oxygen-based.
- nitrogen is present as the coordination species
- nickel is also etched where titanium and niobium are to be etched, which is compatible with the object of the present invention I will not do it.
- Role of base Nucleophilic attack on the chelated metal (eg hydroxide).
- the method of the present invention is a metal selected from titanium, niobium, tungsten, molybdenum, ruthenium, rhodium, arsenic, aluminum and gallium, an oxide of the metal, a nitride of the metal, silicon nitride, hafnium nitride, tantalum nitride or the like It can also be used for etching of alloys, recycling of base substrates and recovery of the above metals, oxides of the metals, nitrides of the metals, silicon nitride, hafnium nitride, tantalum nitride or alloys of these.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- ing And Chemical Polishing (AREA)
- Weting (AREA)
Abstract
Description
で示される化合物から選ばれる錯化剤の1種以上を本質的に含有し、アルカリ性であるエッチング液に接触させ、チタン、ニオブ、タングステン、モリブデン、ルテニウム、ロジウム、砒素、アルミニウムおよびガリウムから選ばれる金属、前記金属の酸化物、前記金属の窒化物、窒化シリコン、窒化ハフニウム、窒化タンタルまたはこれらの合金を選択的にエッチングすることを特徴とするエッチング方法である。
で示される化合物から選ばれる錯化剤の1種以上を本質的に含有し、アルカリ性であることを特徴とするガラス、シリコン、銅およびニッケルから選ばれる下地基材に設けられたチタン、ニオブ、タングステン、モリブデン、ルテニウム、ロジウム、砒素、アルミニウムおよびガリウムから選ばれる金属、前記金属の酸化物、前記金属の窒化物、窒化シリコン、窒化ハフニウム、窒化タンタルまたはこれらの合金用エッチング液である。
サリチル酸またはそのアルカリ金属塩やアンモニウム塩0.1~0.4mol/Lおよび/または、
酒石酸またはそのアルカリ金属塩やアンモニウム塩0.1~0.4mol/Lおよび/または、
クエン酸またはそのアルカリ金属塩やアンモニウム塩0.1~0.4mol/Lと、
過酸化水素0.3~3%を含有し、
pH11以上、好ましくはpH12~14、より好ましくはpH13~14、
のものが挙げられ、より具体的なエッチング液の組成としては、
サリチル酸ナトリウム0.1~0.4mol/Lおよび
酒石酸カリウムナトリウム(ロッシェル塩)0.1~0.4mol/Lおよび
クエン酸トリナトリウム0.1~0.4mol/Lおよび
水酸化ナトリウム0.1~0.4mol/Lおよび
過酸化水素0.3~3%、
を含有するものが挙げられる。
(下地基材) (金属等)
ガラス チタンおよび/またはニオブおよび/またはそれぞれの酸
化物および/または窒化物
ニッケル チタンおよび/または酸化チタンおよび/または窒化チタ
ンおよび/または窒化シリコン
シリコン 窒化タンタルおよび/またはチタンおよび/または窒化チ
タンおよび/または酸化チタンおよび/またはアルミニウ
ムおよび/または酸化アルミニウムおよび/または窒化ア
ルミニウムおよび/またはガリウムおよび/または酸化ガ
リウムおよび/または窒化ガリウム
銅 アルミニウムおよび/または窒化アルミニウムおよび/ま
たはガリウムおよび/または窒化ガリウム
エッチング液:
水100mlに、プロトカテク酸1.54gおよび水酸化ナトリウム1.2gを溶解させた。このエッチング液のpHは14であった。
エッチング液:
水100mlに、クエン酸1.92gおよび水酸化ナトリウム1.2gを溶解させた。このエッチング液のpHは14であった。
エッチング液:
水100mlに、サリチル酸1.38g、過酸化水素(30%)1mlおよび水酸化ナトリウム0.8gを溶解させた。このエッチング液のpHは14であった。
エッチング液:
水100mlに、酒石酸1.50g、過酸化水素(30%)1mlおよび水酸化ナトリウム1.2gを溶解させた。このエッチング液のpHは14あった。
エッチング液:
水100mlに、クエン酸1.92g、過酸化水素(30%)1mlおよび水酸化ナトリウム1.6gを溶解させた。このエッチング液のpH14であった。
エッチング液:
水300mlに、サリチル酸1.38g、酒石酸1.50g、クエン酸1.92g、過酸化水素(30%)3mlおよび水酸化ナトリウム3.6gを溶解させた。このエッチング液のpH14であった。
エッチング液:
水100mlに、過酸化水素(30%)1mlおよび水酸化ナトリウム1.2gを溶解させた。このエッチング液のpHは14であった。
エッチング液:
水100mlに、EDTA・4Na4.16g、過酸化水素(30%)1mlおよび水酸化ナトリウム0.4gを溶解させた。このエッチング液のpHは14であった。
エッチング液:
水100mlにサリチル酸1.38g、過酸化水素(30%)1mlおよび水酸化ナトリウム0.4gを溶解させた。このエッチング液のpHは5であった。
エッチング液:
水100mlにエチルマルトール1.4gおよび水酸化ナトリウム0.8gを溶解させた。このエッチング液のpHは14であった。
エッチング液:
水100mlにアセチルアセトン1.0gおよび水酸化ナトリウム0.8gを溶解させた。このエッチング液のpHは14であった。
エッチング液:
水100mlにグリコール0.6gおよび水酸化ナトリウム0.8gを溶解させた。このエッチング液のpHは14であった。
エッチング液:
水100mlにアスコルビン酸1.76g、過酸化水素(30%)1mlおよび水酸化ナトリウム1.2gを溶解させた。このエッチング液のpHは14であった。
エッチング液
水100mlにプロトカテク酸1.54gを溶解させた。このエッチング液のpHは5であった。
エッチング試験:
ガラスの円筒の内面にスパッタリングでチタンを100nmの厚さで析出させたものを試料とした。実施例1~6および比較例1~8で調製したエッチング液を撹拌子で撹拌しつつ、これに表1に記載の条件で試料を浸漬し、エッチング試験を行った。エッチング試験後の試料の外観を以下の評価基準で評価した。この結果も表1に示した。また、実施例6のエッチング液を用い、80℃、30秒のエッチング条件でエッチングした後の試料の外観写真を図1に示した。
(評価) (内容)
◎ : チタンが完全に溶解した。
○ : チタンがほとんど溶解した。
△ : チタンがほとんど溶解しなかった。
× : チタンが全く溶解しなかった。
<ガラスの溶解評価基準>
(評価) (内容)
+ : ガラスは溶解しなかった。
- : ガラスは溶解した。
エッチング試験:
ヘアライン加工された真鍮製のリングの両面にニッケルめっきを施したものに、スパッタで10nmの酸化チタン、70nmのチタン、45nmの窒化シリコン、85nmの窒化チタン、80nmの窒化シリコンおよび10nmの窒化チタンをこの順で析出させたものを試料とした。実施例1、3~6および比較例1~3、6~8で調製したエッチング液を撹拌子で撹拌しつつ、これに表2に記載の条件で試料を浸漬し、エッチング試験を行った。エッチング試験後の試料の外観を以下の評価基準で評価した。この結果も表2に示した。また、実施例6のエッチング液を用い、80℃、5分のエッチング条件でエッチングした後の試料については、電子線マイクロアナライザ(EPMA)による分析をした。
(評価) (内容)
◎ : 酸化チタン、チタン、窒化シリコン、窒化チタンが完全に
溶解した。
○ : 酸化チタン、チタン、窒化シリコン、窒化チタンがほとん
ど溶解した。
△ : 酸化チタン、チタン、窒化シリコン、窒化チタンがほとん
ど溶解しなかった。
× : 酸化チタン、チタン、窒化シリコン、窒化チタンが全く溶
解しなかった。
<ニッケルの溶解評価基準>
(評価) (内容)
+ : ニッケルは溶解しなかった。
- : ニッケルは溶解した。
エッチング試験:
シリコンウエハーの片面にスパッタで窒化タンタルを50μm析出させたものを試料とした。実施例1、3~6および比較例1~3で調製したエッチング液を撹拌子で撹拌しつつ、これに表3に記載の条件で試料を浸漬し、エッチング試験を行った。エッチング試験後の試料の外観を以下の評価基準で評価した。この結果も表3に示した。
(評価) (内容)
◎ : 窒化タンタルが完全に溶解した。
○ : 窒化タンタルがほとんど溶解した。
△ : 窒化タンタルがほとんど溶解しなかった。
× : 窒化タンタルが全く溶解しなかった。
<シリコンの溶解評価基準>
(評価) (内容)
+ : シリコンは溶解しなかった。
- : シリコンは溶解した。
エッチング試験:
真鍮板の片面にニッケルめっきを施したものを試料A、これにスパッタリングで10nmの酸化チタン、70nmのチタン、45nmの窒化シリコン、85nmの窒化チタン、80nmの窒化シリコンおよび10nmの窒化チタンをこの順で析出させたものを試料Bとした。試料Aおよび試料Bを、実施例6で調製したエッチング液を撹拌子で撹拌しつつ、80℃、5分の条件で浸漬し、エッチング試験を行った。エッチング試験前後の試料について走査型プローブ顕微鏡(SPM)による表面形状および表面荒さ(Ra値)の観察をした。その結果を図2に示した。
エッチング試験:
シリコンウエハ(試料A)の片面にスパッタで窒化タンタルを50μm析出させたものを試料Bとした。試料Bを、実施例6で調製したエッチング液を撹拌子で撹拌しつつ、80℃、40分の条件で浸漬し、エッチング試験を行ったものを試料Cとした。これらの試料について走査型電子顕微鏡(SEM)およびSPMによる観察をした。その結果を図3に示した。
エッチング試験:
シリコンウエハ(試料A)の片面にスパッタで窒化チタンおよび酸化チタンをこの順でそれぞれ50μm析出させたものを試料Bとした。試料Bを、実施例6で調製したエッチング液を撹拌子で撹拌しつつ、80℃、25秒の条件で浸漬し、エッチング試験を行ったものを試料Cとした。これらの試料についてSEMおよびSPMによる観察をした。その結果を図4に示した。
エッチング条件の選定:
エッチング液は、サリチル酸0.334mol/L、酒石酸0.333mol/L、クエン酸0.333mol/Lおよび過酸化水素1mol/Lを含み、pHを水酸化ナトリウムにより11以上に調整したエッチング液を基本組成として、これを以下の表4に記載の通りに薄めてエッチング液を調製した。これらのエッチング液を撹拌子で撹拌しつつ、これを用いて表4に記載の条件で試験例1で用いたのと同様の試料(ガラス円筒)および試験例2で用いたのと同様の試料(リング)をエッチングした。なお、エッチング終了時間は、目視によりスパッタ膜が除去されるまでの時間である。
使用後のエッチング液の元素分析:
実施例6のエッチング液を用い、試験例1で用いたのと同様の試料(ガラス円筒)を80℃で30秒、試験例2で用いたのと同様の試料(リング)を80℃で5分、試験例6で用いたのと同様の試料(シリコンウエハに窒化チタンおよび酸化チタンを析出させたもの(試料B))を80℃で25秒のエッチング後のエッチング液についてICP―AESで元素分析を行った。また、比較として比較例2のエッチング液を用い、同様の試料をエッチング後のエッチング液についても元素分析を行った。これらの分析の結果を表5に示した。
エッチング速度の測定:
(1)チタンのエッチング速度の測定
チタンのエッチング速度は、ガラス上にスパッタでチタンを100nm析出させ、表6に記載のエッチング液を撹拌子で撹拌しつつ、80℃にしたものに浸漬し、エッチング時間、溶解したチタンの量、エッチング液への接触面積から算出した。その結果を表6に示した。
酸化チタン/窒化チタンのエッチング速度は、シリコンウエハ上にスパッタで酸化チタンおよび窒化チタンをこの順でそれぞれ50nmずつ析出させ、表7に記載のエッチング液を撹拌子で撹拌しつつ、80℃にしたものに浸漬し、エッチング時間、溶解した酸化チタン/窒化チタンの量、エッチング液への接触面積から算出した。その結果を表7に示した。
ニオブのエッチング速度は、ガラス上にスパッタでニオブを200nm析出させ、表8に記載のエッチング液を撹拌子で撹拌しつつ、80℃にしたものに浸漬し、エッチング時間、溶解したニオブの量、エッチング液への接触面積から算出した。その結果を表8に示した。
窒化タンタルのエッチング速度は、シリコンウエハ上にスパッタで窒化タンタルを50nm析出させ、表9に記載のエッチング液を撹拌子で撹拌しつつ、80℃にしたものに浸漬し、エッチング時間、溶解した窒化タンタルの量、エッチング液への接触面積から算出した。その結果を表9に示した。
エッチング速度の測定:
(1)ガラスのエッチング速度の測定
ガラスのエッチング速度は、表10に記載のエッチング液を撹拌子で撹拌しつつ、80℃にしたものに浸漬し、エッチング時間、溶解したガラスの量、板ガラスのエッチング液への接触面積に対してエッチング前後の重量差から算出した。その結果を表10に示した。
シリコンのエッチング速度は、表11に記載のエッチング液を撹拌子で撹拌しつつ、80℃にしたものに浸漬し、エッチング時間、溶解したシリコンの量、シリコンウエハのエッチング液への接触面積に対してエッチング前後の重量差から算出した。その結果を表11に示した。
ニッケルのエッチング速度は、表12に記載のエッチング液を撹拌子で撹拌しつつ、80℃にしたものに浸漬し、エッチング時間、溶解したニッケルの量、真鍮製板の前面にニッケルめっきを施したもののエッチング液への接触面積に対してエッチング前後の重量差から算出した。その結果を表12に示した。
エッチング試験:
実施例6で調製したエッチング液を80℃にしたものに、砒化ガリウムウエハの細片を浸漬したところ、ほどなく砒化ガリウム片が溶解した。この結果から、本発明のエッチング液はチタン等と同様に砒素、ガリウムおよび砒化ガリウムも選択的にエッチングできることが分かった。
エッチング試験:
実施例6で調製したエッチング液を80℃にしたものに、タングステン、モリブデン、ルテニウムまたはロジウムの試験片を浸漬すると、ほどなく溶解する。これから、本発明のエッチング液はチタン等と同様にタングステン、モリブデン、ルテニウムまたはロジウムも選択的にエッチングし得る。
再利用試験:
ヘアライン加工された真鍮製のリングの両面にニッケルめっきを施したものに、スパッタで10nmの酸化チタン、70nmのチタン、45nmの窒化シリコン、85nmの窒化チタン、80nmの窒化シリコンおよび10nmの窒化チタンをこの順で析出させたものを試料とした。実施例6で調製したエッチング液を80℃にしたものに試料を5分間浸漬し、スパッタで析出させた酸化チタン、チタン、窒化シリコンおよび窒化チタンを完全にエッチングした。その後、この試料を乾燥させ、更に上記と同様のスパッタを再度行ったところ、エッチング前の試料と同様の外観が得られた。この試験により、試料の再利用が可能なことが示された。
エッチング液:
水1000mlに、サリチル酸23g、ロッシェル塩47g、クエン酸ナトリウム43g、PEG-200
1ml、過酸化水素(34%)50mlおよび水酸化ナトリウム10gを溶解させた。このエッチング液のpHは12.7であった。
エッチング試験:
実施例7で調製したエッチング液のpHを水酸化ナトリウムまたは硫酸を用いて表13に記載のpHに調整した。試験例1で用いたのと同様の試料(ガラス円筒)および試験例2で用いたのと同様の試料(リング)を、それぞれのエッチング液を50℃にしたものに浸漬し、目視によりスパッタ膜が完全に除去されるまでの時間を測定した。それらの結果を表13に示した。
エッチング液:
水1000mlに、クエン酸ナトリウム129g、PEG-2000.1ml、過酸化水素(34%)50mlを溶解させた。このエッチング液のpHは13であった。
エッチング試験:
実施例8で調整したエッチング液を50℃にしたものに、5×5×0.1cmのアルミ板または銅板を浸漬し、試験例10と同様にしてエッチング速度を測定した。アルミ板のエッチング速度は130nm/s、銅板のエッチング速度は0.142nm/sであることがわかった。
エッチング試験:
実施例8で調製したエッチング液を60℃にしたものに、酸化アルミニウムの試験片を浸漬したところ、ほどなく溶解した。この結果から、本発明のエッチング液はチタン等と同様に酸化アルミニウムも選択的にエッチングできることがわかった。
エッチング試験:
実施例8で調製したエッチング液を60℃にしたものに、シリコンウエハに窒化アルミニウムと窒化ガリウムをこの順でスパッタして積層した試験片を浸漬したところ、窒化アルミニウムと窒化ガリウムの層がほどなく溶解した。この結果から、本発明のエッチング液はチタン等と同様に窒化アルミニウムまたは窒化ガリウムも選択的にエッチングできることがわかった。
(1)錯化剤の役割:
選択された錯化剤は表面の金属にキレートすることにより、表面の金属を(a)求核攻撃されやすくし、(b)生成された金属錯体をエッチング液に溶解されやすくしている。即ち、選定された錯化剤の配位子が被エッチング金属原子の形状、軌道配列、電子特性と適合した金属(例:チタン、ニオブ等)に選択的にキレートすることで特定の金属のみがエッチング可能となる。しかし、一般的に使用される錯化剤であるEDTA等を使用すると、その錯化剤は多数の金属と強くキレートするため選択性が低い。即ち、本発明で選択された錯化剤は、被エッチング金属の選択性を特定している一つの要因となる。
錯化剤の錯化能力や選択性は、その錯化剤の配位数、配位種(窒素(例:アミン、ニトリルに含まれる窒素)、酸素(例:ヒドロキシ、カルボン酸、カルボニルに含まれる酸素)、燐、硫黄(例:メルカプト、チオカルボニルに含まれる硫黄))、配位特性、電子特性、多配位数の場合の配位子-配位子間の距離/配列により決定される。本発明では三つの炭素で隔離されている2つか3つの酸素配位を持つ分子で、1つはヒドロキシ、1つはカルボン酸またはベンゼンジオールを有するものが最適と考えられる。(3つの場合のもう一つの配位種も酸素系のものが良い。)例えば配位種に窒素が存在すると、チタンやニオブをエッチングすべきところがニッケルもエッチングされてしまい本発明の目的と合致しなくなる。
(2)塩基の役割:
キレートされた金属に求核攻撃する(例:ヒドロキシド)。
(3)酸化剤の役割:
金属酸化物、金属窒化物、金属錯体内の各々の金属(M)との結合の場合、金属との結合を酸化分解し、格子状・非格子上の結合を破壊させる。
(例:M-O-M→M-O-O-M→2M=O)
金属エッチングの場合、金属または金属錯体を酸化させる。
(例:M→Mn+または配位子-Mn-→配位子-M)
Claims (6)
- ガラス、シリコン、銅およびニッケルから選ばれる下地基材に設けられたチタン、ニオブ、タングステン、モリブデン、ルテニウム、ロジウム、砒素、アルミニウムおよびガリウムから選ばれる金属、前記金属の酸化物、前記金属の窒化物、窒化シリコン、窒化ハフニウム、窒化タンタルまたはこれらの合金の層を、下記式(I)および(II)、
で示される化合物から選ばれる錯化剤の1種以上を本質的に含有し、アルカリ性であるエッチング液に接触させ、チタン、ニオブ、タングステン、モリブデン、ルテニウム、ロジウム、砒素、アルミニウムおよびガリウムから選ばれる金属、前記金属の酸化物、前記金属の窒化物、窒化シリコン、窒化ハフニウム、窒化タンタルまたはこれらの合金を選択的にエッチングすることを特徴とするエッチング方法。 - 更に、エッチング液に酸化剤を含有させるものである請求項1記載のエッチング方法。
- エッチング液のpHが11以上である請求項1または2に記載のエッチング方法。
- 下記式(I)および(II)、
で示される化合物から選ばれる錯化剤の1種以上を本質的に含有し、アルカリ性であることを特徴とするガラス、シリコン、銅およびニッケルから選ばれる下地基材に設けられたチタン、ニオブ、タングステン、モリブデン、ルテニウム、ロジウム、砒素、アルミニウムおよびガリウムから選ばれる金属、前記金属の酸化物、前記金属の窒化物、窒化シリコン、窒化ハフニウム、窒化タンタルまたはこれらの合金用エッチング液。 - 更に、酸化剤を含有する請求項4記載のチタン、ニオブ、タングステン、モリブデン、ルテニウム、ロジウム、砒素、アルミニウムおよびガリウムから選ばれる金属、前記金属の酸化物、前記金属の窒化物、窒化シリコン、窒化ハフニウム、窒化タンタルまたはこれらの合金用エッチング液。
- pHが11以上である請求項4または5に記載のチタン、ニオブ、タングステン、モリブデン、ルテニウム、ロジウム、砒素、アルミニウムおよびガリウムから選ばれる金属、前記金属の酸化物、前記金属の窒化物、窒化シリコン、窒化ハフニウム、窒化タンタルまたはこれらの合金用エッチング液。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/385,007 US9169437B2 (en) | 2012-03-12 | 2012-09-03 | Selective etching method |
JP2014504617A JP6061915B2 (ja) | 2012-03-12 | 2012-09-03 | 選択的エッチング方法 |
KR1020147024576A KR20140134283A (ko) | 2012-03-12 | 2012-09-03 | 선택적 에칭방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JPPCT/JP2012/056315 | 2012-03-12 | ||
JP2012056315 | 2012-03-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013136555A1 true WO2013136555A1 (ja) | 2013-09-19 |
Family
ID=48752668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/072301 WO2013136555A1 (ja) | 2012-03-12 | 2012-09-03 | 選択的エッチング方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9169437B2 (ja) |
JP (1) | JP6061915B2 (ja) |
KR (1) | KR20140134283A (ja) |
CN (1) | CN103205259A (ja) |
WO (1) | WO2013136555A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017162967A (ja) * | 2016-03-09 | 2017-09-14 | 株式会社Adeka | タンタル含有層用エッチング液組成物及びエッチング方法 |
JP2018121056A (ja) * | 2017-01-23 | 2018-08-02 | バーサム マテリアルズ ユーエス,リミティド ライアビリティ カンパニー | タングステン及びgst膜のためのエッチング溶液 |
WO2021201094A1 (ja) * | 2020-03-31 | 2021-10-07 | 株式会社トクヤマ | 半導体用処理液及びその製造方法 |
WO2023228774A1 (ja) * | 2022-05-27 | 2023-11-30 | 東京エレクトロン株式会社 | 基板処理装置および基板処理方法 |
JP7466372B2 (ja) | 2020-05-13 | 2024-04-12 | 東京エレクトロン株式会社 | 基板処理装置および基板処理方法 |
JP7478371B2 (ja) | 2020-04-03 | 2024-05-07 | 株式会社Flosfia | 結晶膜の製造方法 |
JP7478372B2 (ja) | 2020-04-03 | 2024-05-07 | 株式会社Flosfia | 結晶膜の製造方法 |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6494254B2 (ja) * | 2014-11-18 | 2019-04-03 | 関東化學株式会社 | 銅、モリブデン金属積層膜エッチング液組成物、該組成物を用いたエッチング方法および該組成物の寿命を延ばす方法 |
US9797048B2 (en) * | 2015-03-31 | 2017-10-24 | The Boeing Company | Stripping solution for zinc/nickel alloy plating from metal substrate |
JP6761166B2 (ja) * | 2015-07-23 | 2020-09-23 | セントラル硝子株式会社 | ウェットエッチング方法及びエッチング液 |
CN106186714A (zh) * | 2016-07-15 | 2016-12-07 | 天津美泰真空技术有限公司 | 一种抑制tft液晶显示屏减薄后凹点的蚀刻液 |
EP3959291A4 (en) * | 2019-03-11 | 2023-07-19 | Versum Materials US, LLC | ETCHING SOLUTION AND PROCESS FOR ALUMINUM NITRIDE |
KR20210034905A (ko) | 2019-09-23 | 2021-03-31 | 동우 화인켐 주식회사 | 루테늄 금속막 식각액 조성물, 이를 이용한 패턴의 형성 방법 및 어레이 기판의 제조방법, 및 이에 따라 제조된 어레이 기판 |
KR20220166348A (ko) | 2020-04-14 | 2022-12-16 | 엔테그리스, 아이엔씨. | 몰리브데넘을 에칭하기 위한 방법 및 조성물 |
US20220049160A1 (en) * | 2020-08-13 | 2022-02-17 | Entegris, Inc. | Nitride etchant composition and method |
CN112362437B (zh) * | 2020-10-30 | 2023-12-19 | 万华化学集团股份有限公司 | 一种金相侵蚀剂以及金相组织显示方法 |
CN112522707B (zh) * | 2020-11-20 | 2021-12-03 | 湖北兴福电子材料有限公司 | 一种高选择比的钨蚀刻液 |
DE102020133278A1 (de) * | 2020-12-14 | 2022-06-15 | Schott Ag | Verfahren zur Herstellung strukturierter Glasartikel durch alkalische Ätzung |
KR20230032470A (ko) | 2021-08-31 | 2023-03-07 | 동우 화인켐 주식회사 | 루테늄 함유막 식각액 조성물 및 이를 사용한 도전 패턴 형성 방법 |
CN114369461B (zh) * | 2021-12-09 | 2023-02-24 | 湖北兴福电子材料股份有限公司 | 一种氮化铝和硅的高选择性蚀刻液 |
CN115011348B (zh) * | 2022-06-30 | 2023-12-29 | 湖北兴福电子材料股份有限公司 | 一种氮化铝蚀刻液及其应用 |
CN115044376B (zh) * | 2022-06-30 | 2023-12-29 | 湖北兴福电子材料股份有限公司 | 一种掺钪氮化铝蚀刻液及其应用 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008536312A (ja) * | 2005-04-08 | 2008-09-04 | サッチェム, インコーポレイテッド | 金属窒化物の選択的なウェットエッチング |
WO2009081884A1 (ja) * | 2007-12-21 | 2009-07-02 | Wako Pure Chemical Industries, Ltd. | エッチング剤、エッチング方法及びエッチング剤調製液 |
JP2010165732A (ja) * | 2009-01-13 | 2010-07-29 | Hitachi Displays Ltd | エッチング液及びこれを用いたパターン形成方法並びに液晶表示装置の製造方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4554050A (en) | 1984-07-16 | 1985-11-19 | At&T Bell Laboratories | Etching of titanium |
US6630433B2 (en) * | 1999-07-19 | 2003-10-07 | Honeywell International Inc. | Composition for chemical mechanical planarization of copper, tantalum and tantalum nitride |
-
2012
- 2012-09-03 US US14/385,007 patent/US9169437B2/en not_active Expired - Fee Related
- 2012-09-03 KR KR1020147024576A patent/KR20140134283A/ko active IP Right Grant
- 2012-09-03 WO PCT/JP2012/072301 patent/WO2013136555A1/ja active Application Filing
- 2012-09-03 JP JP2014504617A patent/JP6061915B2/ja active Active
-
2013
- 2013-03-11 CN CN2013100766919A patent/CN103205259A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008536312A (ja) * | 2005-04-08 | 2008-09-04 | サッチェム, インコーポレイテッド | 金属窒化物の選択的なウェットエッチング |
WO2009081884A1 (ja) * | 2007-12-21 | 2009-07-02 | Wako Pure Chemical Industries, Ltd. | エッチング剤、エッチング方法及びエッチング剤調製液 |
JP2010165732A (ja) * | 2009-01-13 | 2010-07-29 | Hitachi Displays Ltd | エッチング液及びこれを用いたパターン形成方法並びに液晶表示装置の製造方法 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017162967A (ja) * | 2016-03-09 | 2017-09-14 | 株式会社Adeka | タンタル含有層用エッチング液組成物及びエッチング方法 |
JP2018121056A (ja) * | 2017-01-23 | 2018-08-02 | バーサム マテリアルズ ユーエス,リミティド ライアビリティ カンパニー | タングステン及びgst膜のためのエッチング溶液 |
WO2021201094A1 (ja) * | 2020-03-31 | 2021-10-07 | 株式会社トクヤマ | 半導体用処理液及びその製造方法 |
JP7478371B2 (ja) | 2020-04-03 | 2024-05-07 | 株式会社Flosfia | 結晶膜の製造方法 |
JP7478372B2 (ja) | 2020-04-03 | 2024-05-07 | 株式会社Flosfia | 結晶膜の製造方法 |
JP7466372B2 (ja) | 2020-05-13 | 2024-04-12 | 東京エレクトロン株式会社 | 基板処理装置および基板処理方法 |
WO2023228774A1 (ja) * | 2022-05-27 | 2023-11-30 | 東京エレクトロン株式会社 | 基板処理装置および基板処理方法 |
Also Published As
Publication number | Publication date |
---|---|
JP6061915B2 (ja) | 2017-01-18 |
CN103205259A (zh) | 2013-07-17 |
US9169437B2 (en) | 2015-10-27 |
JPWO2013136555A1 (ja) | 2015-08-03 |
KR20140134283A (ko) | 2014-11-21 |
US20150048053A1 (en) | 2015-02-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2013136555A1 (ja) | 選択的エッチング方法 | |
JP4605409B2 (ja) | アルミニウム又はアルミニウム合金の表面処理方法 | |
JP5699794B2 (ja) | アルミニウム酸化皮膜用除去液及びアルミニウム又はアルミニウム合金の表面処理方法 | |
TWI419995B (zh) | 鋁或鋁合金之表面處理方法 | |
TW201105780A (en) | Etchant composition and method | |
KR20100123652A (ko) | 구리 함유 적층 막용 에칭액 | |
JP2008169446A (ja) | アルミニウム酸化皮膜用除去液及びアルミニウム又はアルミニウム合金の表面処理方法 | |
JP2005097715A (ja) | チタン含有層用エッチング液及びチタン含有層のエッチング方法 | |
KR20150067385A (ko) | 에칭액 및 그것을 이용한 에칭 방법 | |
TWI545228B (zh) | 銅或以銅為主成分之化合物之蝕刻液 | |
JP5304637B2 (ja) | エッチング液及びエッチング方法 | |
JP2006229196A (ja) | エッチング液と補給液及びこれを用いた導体パターンの形成方法 | |
JP2009007634A (ja) | 銀合金膜のエッチング方法およびエッチング溶液 | |
JP2009074142A (ja) | チタン含有層用エッチング液及びチタン含有層のエッチング方法 | |
KR102008689B1 (ko) | 구리 및 몰리브덴을 포함하는 다층막의 에칭에 사용되는 액체 조성물, 및 그 액체 조성물을 이용한 기판의 제조방법, 그리고 그 제조방법에 의해 제조되는 기판 | |
KR20210153221A (ko) | 선택적 에칭방법 | |
TW200909610A (en) | Etching solution composition | |
JP2008166600A (ja) | 異方性エッチング液およびそれを用いたエッチング方法 | |
JP5874308B2 (ja) | 銅及びモリブデンを含む多層膜用エッチング液 | |
WO2000011107A1 (en) | Ito etching composition | |
JP4838578B2 (ja) | 微細加工処理剤、及びそれを用いた微細加工処理方法 | |
WO2013047156A1 (ja) | 洗浄剤組成物およびその製造方法 | |
JPS5830738B2 (ja) | エツチングエキ | |
JP2008144205A (ja) | チタンまたはチタン合金用酸洗液、およびこれを用いた酸洗方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12870982 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20147024576 Country of ref document: KR Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2014504617 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14385007 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12870982 Country of ref document: EP Kind code of ref document: A1 |