WO2000034996A1 - Agent de decapage pour enlever les residus de reserve - Google Patents
Agent de decapage pour enlever les residus de reserve Download PDFInfo
- Publication number
- WO2000034996A1 WO2000034996A1 PCT/JP1999/006915 JP9906915W WO0034996A1 WO 2000034996 A1 WO2000034996 A1 WO 2000034996A1 JP 9906915 W JP9906915 W JP 9906915W WO 0034996 A1 WO0034996 A1 WO 0034996A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- removal
- resist residue
- corrosion
- remover
- ammonium phosphate
- Prior art date
Links
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 32
- 239000004254 Ammonium phosphate Substances 0.000 claims abstract description 21
- 229910000148 ammonium phosphate Inorganic materials 0.000 claims abstract description 21
- 235000019289 ammonium phosphates Nutrition 0.000 claims abstract description 21
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000007864 aqueous solution Substances 0.000 claims abstract description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 29
- 239000004094 surface-active agent Substances 0.000 claims description 14
- 239000002738 chelating agent Substances 0.000 claims description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052698 phosphorus Inorganic materials 0.000 claims description 12
- 239000011574 phosphorus Substances 0.000 claims description 12
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 11
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 5
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 2
- PYCBFXMWPVRTCC-UHFFFAOYSA-N ammonium metaphosphate Chemical compound N.OP(=O)=O PYCBFXMWPVRTCC-UHFFFAOYSA-N 0.000 claims description 2
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 2
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 38
- 230000007797 corrosion Effects 0.000 abstract description 38
- 229910052751 metal Inorganic materials 0.000 abstract description 23
- 239000002184 metal Substances 0.000 abstract description 23
- 238000012545 processing Methods 0.000 description 26
- 239000000203 mixture Substances 0.000 description 19
- 235000011007 phosphoric acid Nutrition 0.000 description 15
- 239000000126 substance Substances 0.000 description 13
- 239000000758 substrate Substances 0.000 description 12
- -1 ammonium fluoride Chemical compound 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 9
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 9
- 229920002120 photoresistant polymer Polymers 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 238000005530 etching Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000010828 elution Methods 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 229910019142 PO4 Inorganic materials 0.000 description 5
- 238000004380 ashing Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000005468 ion implantation Methods 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229920003986 novolac Polymers 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 235000021317 phosphate Nutrition 0.000 description 5
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 4
- 229920000388 Polyphosphate Polymers 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 239000001205 polyphosphate Substances 0.000 description 4
- 235000011176 polyphosphates Nutrition 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- KWIUHFFTVRNATP-UHFFFAOYSA-N glycine betaine Chemical compound C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 125000005341 metaphosphate group Chemical group 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- 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
- 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
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000005211 alkyl trimethyl ammonium group Chemical group 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- SWXQKHHHCFXQJF-UHFFFAOYSA-N azane;hydrogen peroxide Chemical compound [NH4+].[O-]O SWXQKHHHCFXQJF-UHFFFAOYSA-N 0.000 description 2
- 229960003237 betaine Drugs 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 235000011180 diphosphates Nutrition 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- XEMZLVDIUVCKGL-UHFFFAOYSA-N hydrogen peroxide;sulfuric acid Chemical compound OO.OS(O)(=O)=O XEMZLVDIUVCKGL-UHFFFAOYSA-N 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 229940048084 pyrophosphate Drugs 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- XUJNEKJLAYXESH-REOHCLBHSA-N L-Cysteine Chemical compound SC[C@H](N)C(O)=O XUJNEKJLAYXESH-REOHCLBHSA-N 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 241000047703 Nonion Species 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005090 crystal field Methods 0.000 description 1
- XUJNEKJLAYXESH-UHFFFAOYSA-N cysteine Natural products SCC(N)C(O)=O XUJNEKJLAYXESH-UHFFFAOYSA-N 0.000 description 1
- 235000018417 cysteine Nutrition 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- XQRLCLUYWUNEEH-UHFFFAOYSA-N diphosphonic acid Chemical compound OP(=O)OP(O)=O XQRLCLUYWUNEEH-UHFFFAOYSA-N 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- DHAFIDRKDGCXLV-UHFFFAOYSA-N n,n-dimethylformamide;1-methylpyrrolidin-2-one Chemical compound CN(C)C=O.CN1CCCC1=O DHAFIDRKDGCXLV-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 229940005657 pyrophosphoric acid Drugs 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- JWHOQZUREKYPBY-UHFFFAOYSA-N rubonic acid Natural products CC1(C)CCC2(CCC3(C)C(=CCC4C5(C)CCC(=O)C(C)(C)C5CC(=O)C34C)C2C1)C(=O)O JWHOQZUREKYPBY-UHFFFAOYSA-N 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-N triphosphoric acid Chemical compound OP(O)(=O)OP(O)(=O)OP(O)(O)=O UNXRWKVEANCORM-UHFFFAOYSA-N 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/422—Stripping or agents therefor using liquids only
- G03F7/425—Stripping or agents therefor using liquids only containing mineral alkaline compounds; containing organic basic compounds, e.g. quaternary ammonium compounds; containing heterocyclic basic compounds containing nitrogen
-
- 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
- H01L21/31127—Etching organic layers
- H01L21/31133—Etching organic layers by chemical means
Definitions
- the present invention relates to a resist residue removing agent for removing a resist residue generated in a semiconductor device manufacturing process or a liquid crystal device manufacturing process. More specifically, a photoresist is coated on a conductive metal film or insulating film formed on a substrate, and exposed and developed to form a resist pattern. Using this pattern as a mask, the metal film or insulating film is selectively etched. After forming a circuit by ion implantation or ion implantation, unnecessary resist is removed by asshing, and the remaining resist and other residues are removed without corroding the conductive film and insulating film. Agent. Background art
- strong acids such as hydrochloric acid, sulfuric acid, and nitric acid; hydrogen peroxide; ammonia;
- a composition containing a fluoride such as ammonium fluoride, etc .; an amine or hydrazine such as hydroxylamine, hydrazine, monoethanolamine, etc. as a main component and mixed with an organic solvent or the like is used.
- compositions are harmful substances or contain large amounts of dangerous substances such as organic solvents, so safety measures in the semiconductor manufacturing process and excessive measures for the natural environment such as wastewater treatment are required. .
- a remover composition containing ammonium fluoride as a main component the main component itself is a deleterious substance, and there is a dangerous substance such as N-methylpyrrolidone-dimethylformamide.
- a dangerous substance such as N-methylpyrrolidone-dimethylformamide.
- Used after dilution with organic solvent Hydroxamine, tetramethylammonium hydroxide, monoethanolamine, and the like are organic substances themselves, or are used as a composition with other organic substances.
- a composition containing many organic substances requires a rinsing step after the resist residue removing step, and this step needs to be washed with a water-soluble organic solvent such as isopropyl alcohol and N-methylpyrrolidone. This organic solvent is dangerous and requires safety and environmental measures.
- An object of the present invention is to remove a resist residue in a semiconductor device manufacturing process or a liquid crystal device manufacturing process, that is, a residue containing a metal component generated by dry etching, a resist containing implanted ions, without corroding wiring and gate metal.
- An object of the present invention is to provide a resist residue removing agent which can be removed.
- a resist residue remover which is an aqueous solution containing ammonium phosphate and Z or condensed ammonium phosphate and having an pH in the range of 1 to 10.
- FIG. 1 is a graph showing the relationship between the composition of the remover and the amount of aluminum eluted.
- the resist residue removing agent of the present invention removes resist residues generated during ion implantation, dry etching, and assuring in a semiconductor device manufacturing process and a liquid crystal device (LCD) manufacturing process. It is a composition comprising ammonium phosphate and an aqueous solution in the range of ⁇ 1-10.
- the resist residue generated by ion implantation or dry etching adds inorganic properties to the organic resist film. In addition, it is transformed into a substance containing oxide by oxygen plasma ashing for resist removal. These residues are included in the resist residue, including those called polymers.
- Such a remover is an aqueous solution containing ammonium phosphate and condensed ammonium phosphate, and does not contain harmful substances or poisons and does not belong to hazardous substances. Therefore, it is preferable in terms of work environment and work safety. In addition, since it does not contain a large amount of organic substances, the treatment of waste liquid can be simplified.
- the removing agent of the present invention can be simply brought into contact with the object to be processed without going through complicated steps, and the post-processing step can be performed only with water, so that the processing operation is easy. Further, there is no problem of remaining on the object to be processed including metal or the like to cause corrosion or the like.
- the ammonium phosphate used in the removing agent of the present invention is an ammonium salt of orthophosphoric acid (H 3 PO 4 ), and may contain an acid salt in addition to a neutral salt.
- These condensed phosphates may be partially acidic.
- the condensed phosphate is a mixture of the above-mentioned phosphates, and generally contains orthophosphate.
- the concentration of the above-mentioned phosphoric acid compound such as ammonium orthophosphate in such a removing agent is preferably 20% by mass or less, expressed as a total phosphorus concentration, and is usually from 0.1 to 10% by mass. preferable.
- condensed phosphate corrosion of the object to be treated is suppressed. Also, the pH tolerance for corrosion is increased.
- the concentration of the above-mentioned phosphoric acid compound is represented by a total phosphorus concentration of 0.1. It is preferably set to 5% by mass. Thereby, the problem of metal corrosion is reduced, and this is preferable also in environmental aspects such as waste liquid treatment. Further, with such an amount, cracking of the metal layer can be effectively prevented particularly when the line width is about submicron, for example, 0.1 / zm or more and less than 1 ⁇ .
- the concentration of the above-mentioned phosphoric acid compound is expressed as the total phosphorus concentration, from 1 to It is preferably set to 10% by mass.
- the removing agent of the present invention can be used in the range of ⁇ 1 to 10 and may be selected depending on the purpose and the like.
- For adjusting the pH orthophosphoric acid, condensed phosphoric acid, or ammonia is used.
- By adjusting the pH using these it is possible to improve the removal capability according to the type of the resist residue, to reduce metal corrosion and to control the temperature and time of the removal process. In general, the lower the pH, the better the ability to remove resist residues.
- a surfactant / chelating agent may be added to the removing agent of the present invention. Particularly, the addition of a surfactant is preferable.
- the surfactant may be any of nonionic, cationic, anionic and amphoteric, and commercially available products can be used.
- nonionic properties include polyoxyethylene and amine oxides
- cationic properties include alkyltrimethylammonium salt, etc.
- anionic properties include alkyl rubonic acid
- amphoteric properties include betaine.
- Alkyl fluoride compounds May be used. Further, different surfactants may be used as a mixture.
- chelating agent examples include catechol, benzotriazole, diphosphonic acid and the like.
- different chelating agents may be used as a mixture, and a surfactant and a chelating agent may be used in combination.
- the addition of surfactants and chelating agents is effective.
- the addition amount of the surfactant is preferably 0.002 to 1% by mass, and the addition amount of the chelating agent is 0.01 to 5% by mass. / 0 is preferred.
- the removing agent of the present invention may appropriately contain an oxidizing agent or a reducing agent in order to improve the removing ability according to the type of the resist residue.
- the oxidizing agent include hydrogen peroxide
- examples of the reducing agent include ascorbic acid and cysteine.
- the addition amount is preferably 0.5 to 5.5% by mass, and when the reducing agent is used, the addition amount is preferably 1 to 10% by mass.
- the resist in the present invention may be a positive type or a negative type, but a positive type made of a novolak resin material is particularly preferable.
- the remover of the present invention has a specified level of impurities according to the field of application.
- the quality can be reduced to the following.
- impurities can be removed from the removing agent of the present invention by electrodialysis or the like.
- the removal of the resist residue by the removing agent of the present invention is performed by bringing the removing agent into contact with the object to be processed.
- the contact may be performed by a method such as spraying the removing agent on the portion to be treated of the object to be treated, but preferably, the object is immersed in a tank filled with the removing agent of the present invention. In such treatment in the tank, it is preferable to stir or rock.
- the contact temperature, time, etc. with the remover depend on the pH of the remover, the nature of the object to be treated, the material of the object to be treated, etc., but it is 1 minute to 60 minutes at a temperature of 23 ° C to 90 ° C. Just touch It requires only a relatively low temperature and a short processing time.
- the entire amount of the liquid in the tank can be replaced for each fixed processing, and in the case of continuous processing, to compensate for the evaporation Alternatively, a new solution (replenisher) may be replenished.
- the capacity of the processing tank is about 20 to 300 liters.
- the object to be treated after the treatment with the removing agent of the present invention is further washed with water.
- Ammonium orthophosphate was used as the phosphoric acid compound and contained 1.0% by mass in terms of phosphorus concentration. Orthophosphoric acid and ammonia were appropriately used and diluted with water to adjust to the pH shown in Table 1. .
- An 8 inch diameter, 700 / xm thick Si / Ti / TiN / A1 / TiN laminated substrate is patterned using a positive photoresist made of novolak resin, An etching process was performed. Chlorine-based and fluorine-based gases were used as the etching gas. After the etching, the photoresist was removed by oxygen plasma ashing, and the laminated substrate after this was used as a workpiece A.
- the above-mentioned laminated substrate (object A) is removed at 35 ° C using the above-mentioned removing agent. After that, a water washing treatment was performed. Table 1 shows the removal processing time.
- the remover was filled in a 20-liter tank with a lid and treated. Pure water for washing was also filled in a tank of the same capacity, and was washed with water at 25 ° C for 5 minutes.
- Table 1 shows the results of evaluation of the resist residue removal status and metal corrosion of the laminated substrate after the removal treatment.
- the removal status of the resist residue was evaluated by scanning electron microscope (SEM) photographs of the side surface of the wiring in the wide area and the top surface of the wiring when the space line was set at 0.25 ⁇ 0.25 ⁇ .
- ⁇ resist residue removal completely
- ⁇ resist residue removal is a little incomplete but acceptable for practical use
- X resist residue removal is incomplete and practical (Not acceptable level).
- the metal corrosion was evaluated for A1, and ⁇ (no metal corrosion was observed at all), ⁇ (slight metal corrosion was observed, but at a practically acceptable level), and X (metal corrosion was observed). (Not practically acceptable).
- Ammonium orthophosphate composition 35.C
- Table 1 shows that by selecting the processing conditions, it is possible to remove the resist residue over a wide pH range without involving metal corrosion. Furthermore, it can be seen that the allowable range of the processing conditions is wide depending on the pH of the removing agent.
- pyrophosphate Anmoniumu and condensed phosphoric acid ammonium two ⁇ beam and orthophosphoric acid consisting of pyrophosphate Anmoniumu, water removal with an adjusted phosphate concentration (ion exchanged water) 1. 0 mass 0/0, pH 2. 5 Agent No. 21 was prepared. The concentrations of pyrophosphoric acid and tripolyphosphoric acid in this remover were 0.27% by mass and 0.07% by mass, respectively, in terms of phosphorus concentration.
- the resist residue can be removed without causing metal corrosion.
- the pH of the removing agent containing the ammonium orthophosphate of Example 1 and the removing agent containing the condensed ammonium phosphate of Example 2 were adjusted using ammonia and orthophosphoric acid. I examined it as follows. Aluminum elution detection An aluminum plate (length 1 OmmX width 1 OmmX thickness lmm) was immersed in a remover at 45 ° C for 3 hours, and the elution amount (gZ liter) of A1 was determined by the atomic absorption method. Figure 1 shows these results.
- the remover was prepared in the same manner as in Example 1, except that the phosphorus concentration was changed to 6% by mass.
- the photoresist was removed by oxygen plasma ashing, and the laminated substrate thereafter was used as a processing target B.
- p- TEOS S i O 2
- FSG fluoride silicate glass
- the removal treatment was performed in the same manner as in Example 1 except that the treatment temperature was changed from 55 ° C to 75 ° C and the treatment time was set to 15 minutes.
- Table 3 shows the results of the evaluation performed in the same manner as in Example 1.
- the remover was prepared in the same manner as in Example 1 except that the phosphorus concentration was 1.5% by mass and the pH was changed.
- the removal treatment was performed in the same manner as in Example 1 except that the treatment temperature was changed from 45 to 75 ° C. and the treatment time was set to 15 minutes.
- Table 4 shows the results of the evaluation performed in the same manner as in Example 1.
- the removal agent was prepared in the same manner as in Example 1 except that the phosphorus concentration was 1.5% by mass and the pH was changed.
- a positive photoresist novolak resin material was patterned using relative 7 0 0 / zm thick S i / S i O 2 ( S i 0 2 thickness. 2 to 5 nm) laminated base board, Asion was implanted at a dose of 5 ⁇ 10 15 atoms / cm 2 (the dose in this case is the amount of ion implanted and is expressed in terms of the number of atoms per cm 2 ). . After the ion implantation, the photoresist was removed by oxygen plasma ashing, and the laminated substrate after this was used as a workpiece D.
- the removal temperature is 5-5.
- the procedure was performed in the same manner as in Example 1 except that the processing time was changed to 85 ° C. from the same temperature and the processing time was changed to 15 minutes.
- Table 5 shows the results of the evaluation performed in the same manner as in Example 1.
- Remover No. 21 In contrast to the remover No. 21 containing the condensed ammonium phosphate of Example 2, 10 Oppm of a perfluorinated alkyltrimethylammonium salt-based cationic surfactant A, and amphoteric surfactant of a perfluoroalkyl betaine-based surfactant were used.
- Remover Nos. 22, 23, and 24 were prepared by adding 10 Oppm of Agent B and 10 Oppm of perfluoroalkylalkylamine oxide-based nonionic surfactant C, respectively.
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Cleaning Or Drying Semiconductors (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Drying Of Semiconductors (AREA)
- Weting (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020007008660A KR100345033B1 (ko) | 1998-12-09 | 1999-12-09 | 레지스트잔사제거제 |
EP99961289A EP1063689B1 (en) | 1998-12-09 | 1999-12-09 | Stripping agent against resist residues |
US09/635,487 US6534459B1 (en) | 1998-12-09 | 2000-08-09 | Resist residue remover |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10/368536 | 1998-12-09 | ||
JP36853698 | 1998-12-09 | ||
JP11/334202 | 1999-11-25 | ||
JP33420299A JP3328250B2 (ja) | 1998-12-09 | 1999-11-25 | レジスト残渣除去剤 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/635,487 Continuation US6534459B1 (en) | 1998-12-09 | 2000-08-09 | Resist residue remover |
Publications (1)
Publication Number | Publication Date |
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WO2000034996A1 true WO2000034996A1 (fr) | 2000-06-15 |
Family
ID=26574772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/006915 WO2000034996A1 (fr) | 1998-12-09 | 1999-12-09 | Agent de decapage pour enlever les residus de reserve |
Country Status (7)
Country | Link |
---|---|
US (1) | US6534459B1 (ja) |
EP (1) | EP1063689B1 (ja) |
JP (1) | JP3328250B2 (ja) |
KR (1) | KR100345033B1 (ja) |
CN (1) | CN1139970C (ja) |
TW (1) | TW487830B (ja) |
WO (1) | WO2000034996A1 (ja) |
Cited By (1)
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JP2002062669A (ja) * | 2000-08-22 | 2002-02-28 | Tosoh Corp | レジスト剥離剤 |
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US11091727B2 (en) | 2018-07-24 | 2021-08-17 | Versum Materials Us, Llc | Post etch residue cleaning compositions and methods of using the same |
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- 1999-11-25 JP JP33420299A patent/JP3328250B2/ja not_active Expired - Lifetime
- 1999-12-09 KR KR1020007008660A patent/KR100345033B1/ko active IP Right Grant
- 1999-12-09 CN CNB998028134A patent/CN1139970C/zh not_active Expired - Lifetime
- 1999-12-09 TW TW088121601A patent/TW487830B/zh not_active IP Right Cessation
- 1999-12-09 WO PCT/JP1999/006915 patent/WO2000034996A1/ja active IP Right Grant
- 1999-12-09 EP EP99961289A patent/EP1063689B1/en not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
EP1063689B1 (en) | 2012-05-02 |
US6534459B1 (en) | 2003-03-18 |
TW487830B (en) | 2002-05-21 |
EP1063689A1 (en) | 2000-12-27 |
JP2000232063A (ja) | 2000-08-22 |
CN1139970C (zh) | 2004-02-25 |
CN1290402A (zh) | 2001-04-04 |
JP3328250B2 (ja) | 2002-09-24 |
EP1063689A4 (en) | 2001-08-22 |
KR100345033B1 (ko) | 2002-07-24 |
KR20010040771A (ko) | 2001-05-15 |
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