WO2015015642A1 - マスクペースト組成物、これを用いて得られる半導体素子および半導体素子の製造方法 - Google Patents
マスクペースト組成物、これを用いて得られる半導体素子および半導体素子の製造方法 Download PDFInfo
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- WO2015015642A1 WO2015015642A1 PCT/JP2013/071026 JP2013071026W WO2015015642A1 WO 2015015642 A1 WO2015015642 A1 WO 2015015642A1 JP 2013071026 W JP2013071026 W JP 2013071026W WO 2015015642 A1 WO2015015642 A1 WO 2015015642A1
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- WO
- WIPO (PCT)
- Prior art keywords
- mask
- polysiloxane
- weight
- paste composition
- acid
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 197
- 239000004065 semiconductor Substances 0.000 title claims description 45
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- -1 polysiloxane Polymers 0.000 claims abstract description 214
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 169
- 239000007787 solid Substances 0.000 claims abstract description 103
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000002904 solvent Substances 0.000 claims abstract description 55
- 239000002245 particle Substances 0.000 claims abstract description 50
- 239000012535 impurity Substances 0.000 claims abstract description 23
- 238000009835 boiling Methods 0.000 claims abstract description 19
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 11
- 229910052796 boron Inorganic materials 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 52
- 239000000758 substrate Substances 0.000 claims description 52
- 125000003118 aryl group Chemical group 0.000 claims description 27
- 125000004432 carbon atom Chemical group C* 0.000 claims description 25
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 150000003839 salts Chemical class 0.000 claims description 14
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 13
- 125000000217 alkyl group Chemical group 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 150000001282 organosilanes Chemical class 0.000 claims description 10
- 229920001451 polypropylene glycol Polymers 0.000 claims description 9
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 8
- 125000003342 alkenyl group Chemical group 0.000 claims description 7
- 239000012298 atmosphere Substances 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 125000002252 acyl group Chemical group 0.000 claims description 5
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 5
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims 1
- 238000003860 storage Methods 0.000 abstract description 17
- 230000000873 masking effect Effects 0.000 abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 abstract description 12
- 239000006185 dispersion Substances 0.000 abstract description 9
- 238000000059 patterning Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 3
- 239000000178 monomer Substances 0.000 description 137
- 238000011156 evaluation Methods 0.000 description 102
- 239000000243 solution Substances 0.000 description 85
- 239000010408 film Substances 0.000 description 69
- 238000005259 measurement Methods 0.000 description 68
- 239000000047 product Substances 0.000 description 53
- 230000015572 biosynthetic process Effects 0.000 description 45
- 229910004298 SiO 2 Inorganic materials 0.000 description 44
- 238000003786 synthesis reaction Methods 0.000 description 44
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 33
- 238000000576 coating method Methods 0.000 description 31
- 239000002562 thickening agent Substances 0.000 description 30
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 26
- 239000011248 coating agent Substances 0.000 description 24
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 22
- 238000009792 diffusion process Methods 0.000 description 21
- 238000006460 hydrolysis reaction Methods 0.000 description 19
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 18
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- 239000010703 silicon Substances 0.000 description 18
- 238000001723 curing Methods 0.000 description 17
- 238000010304 firing Methods 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 238000012790 confirmation Methods 0.000 description 14
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 13
- 235000019253 formic acid Nutrition 0.000 description 13
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- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 12
- 230000035484 reaction time Effects 0.000 description 12
- 238000003756 stirring Methods 0.000 description 12
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 11
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- 238000007650 screen-printing Methods 0.000 description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
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- 239000000377 silicon dioxide Substances 0.000 description 9
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical class OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
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- 239000002612 dispersion medium Substances 0.000 description 8
- 239000002019 doping agent Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 8
- 150000004756 silanes Chemical class 0.000 description 8
- 239000004094 surface-active agent Substances 0.000 description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 7
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- 238000004132 cross linking Methods 0.000 description 7
- 230000002829 reductive effect Effects 0.000 description 7
- 229910000077 silane Inorganic materials 0.000 description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 6
- 230000007062 hydrolysis Effects 0.000 description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 6
- 238000006116 polymerization reaction Methods 0.000 description 6
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 6
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 5
- 239000008119 colloidal silica Substances 0.000 description 5
- AHUXYBVKTIBBJW-UHFFFAOYSA-N dimethoxy(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](OC)(OC)C1=CC=CC=C1 AHUXYBVKTIBBJW-UHFFFAOYSA-N 0.000 description 5
- 125000000524 functional group Chemical group 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 5
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- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 5
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 4
- GQCZPFJGIXHZMB-UHFFFAOYSA-N 1-tert-Butoxy-2-propanol Chemical compound CC(O)COC(C)(C)C GQCZPFJGIXHZMB-UHFFFAOYSA-N 0.000 description 4
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 4
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 4
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 4
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- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 4
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
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- 239000006087 Silane Coupling Agent Substances 0.000 description 4
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 4
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- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 4
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- ZGKWWOVOEOZQPP-UHFFFAOYSA-N (3-ethyloxetan-3-yl)methoxymethoxy-dimethoxy-propylsilane Chemical compound C(C)C1(COC1)COCO[Si](OC)(OC)CCC ZGKWWOVOEOZQPP-UHFFFAOYSA-N 0.000 description 2
- LTQBNYCMVZQRSD-UHFFFAOYSA-N (4-ethenylphenyl)-trimethoxysilane Chemical compound CO[Si](OC)(OC)C1=CC=C(C=C)C=C1 LTQBNYCMVZQRSD-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 2
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/22—Diffusion of impurity materials, e.g. doping materials, electrode materials, into or out of a semiconductor body, or between semiconductor regions; Interactions between two or more impurities; Redistribution of impurities
- H01L21/225—Diffusion of impurity materials, e.g. doping materials, electrode materials, into or out of a semiconductor body, or between semiconductor regions; Interactions between two or more impurities; Redistribution of impurities using diffusion into or out of a solid from or into a solid phase, e.g. a doped oxide layer
- H01L21/2251—Diffusion into or out of group IV semiconductors
- H01L21/2254—Diffusion into or out of group IV semiconductors from or through or into an applied layer, e.g. photoresist, nitrides
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- 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
- H01L21/22—Diffusion of impurity materials, e.g. doping materials, electrode materials, into or out of a semiconductor body, or between semiconductor regions; Interactions between two or more impurities; Redistribution of impurities
- H01L21/2225—Diffusion sources
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
Definitions
- the present invention relates to a mask paste composition for masking an undoped region when a dopant is diffused in a semiconductor substrate.
- the present invention also relates to a cured film formed therefrom and a semiconductor element such as a photoelectric conversion element patterned with impurities.
- an N-type or P-type dopant component is applied by a solution by a CVD method or a doping paste, and then the semiconductor is formed by thermal diffusion.
- a doping layer is formed by diffusing into the substrate.
- a doping paste a thermal oxide film is first formed on the surface of the semiconductor substrate, and then a resist having a predetermined pattern is laminated on the thermal oxide film by photolithography. Then, using the resist as a mask, the portion of the thermal oxide film that is not masked with acid or alkali is etched, and the resist is peeled off to form a mask of the thermal oxide film.
- an N-type or P-type doping paste is applied, and the paste is attached to the portion where the mask is opened. Thereafter, the doping component in the paste is thermally diffused at 700 to 1100 ° C. to form an N-type or P-type doping layer.
- Patent Document 1 Regarding the manufacture of such a solar cell, in recent years, as disclosed in Patent Document 1, the conventional photolithographic technique is not used, and the mask layer region is simply patterned by printing or the like. Manufacturing is under consideration.
- semiconductor substrates used for solar cells are often not mirror-finished on the surface, and when a mask is formed on the surface of such a semiconductor substrate, the mask material accumulates in the recesses and the mask film thickness in the recesses is large. Thus, the mask film thickness at the convex portion is reduced. For this reason, the thickness of the mask layer after application is not uniform, and a material having a large film thickness margin, which is the difference between the upper limit of usable film thickness and the lower limit of film thickness, is required for the mask paste.
- the boundary portion of the mask layer region tends to be thin, those having a mask property in a region having a small film thickness of about 0.1 to 0.2 ⁇ m have a fine pattern processing property of the mask. It is calculated from the point.
- Patent Documents 1 and 2 propose siloxane-based mask pastes. Further, Patent Document 3 proposes a mask paste that has a bulky functional group that disappears after firing so that the structure after firing is loose, and is excellent in crack resistance during thickening.
- the mask pastes described in Patent Documents 1 and 2 exhibit masking properties at a film thickness of about 0.2 ⁇ m, they are poor in crack resistance and are not preferable for increasing the film thickness.
- the film thickness is increased, there is a problem in that the mask property is lost due to cracks in the film when the mask layer is processed at a high temperature or when the doping component is thermally diffused.
- the mask paste described in Patent Document 3 needs to be thickened in order to obtain masking properties, and cannot obtain masking properties in a low film thickness region. There is also a problem that the crack resistance is not sufficient.
- This invention is made
- the present invention has the following configuration. That is, (a) polysiloxane synthesized by reacting at least one organosilane represented by the general formula (1), (b) silica particles having an average particle diameter of 150 nm or less, and (c) a boiling point of 130 ° C. or more. (A) the average weight molecular weight of the polysiloxane is 1000 or more, the silica particles in the composition solid content is 20% by weight or more and 70% by weight or less, and P, B in the total composition
- the mask paste composition is characterized in that each Al concentration is 20 ppm or less.
- R 1 represents any one of hydrogen, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, and an aryl group having 6 to 15 carbon atoms, and a plurality of R 1 may be the same or different.
- R 2 represents any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, an acyl group having 2 to 6 carbon atoms, and an aryl group having 6 to 15 carbon atoms, and a plurality of R 2 may be the same (N may represent an integer of 0 to 3).
- the mask paste composition of the present invention has excellent crack resistance in high-temperature processes such as curing and baking and thermal diffusion of the dopant, and the cured film has excellent masking properties against the dopant. Therefore, the film paste has a wide film thickness margin that can withstand practical use as a mask paste. In addition, it has excellent pattern accuracy at the time of patterning application, and has extremely small changes in characteristics during long-term storage as a paste.
- Process drawing which shows an example of the manufacturing method of the semiconductor element using the mask paste composition of this invention.
- the perspective view which shows the slit coating device used in the Example.
- Sectional drawing which shows the state which has apply
- the mask paste composition of the present invention comprises (a) polysiloxane synthesized by reacting at least one organosilane represented by the general formula (1), (b) silica particles having an average particle diameter of 150 nm or less, ( c) Contains a solvent having a boiling point of 130 ° C or higher.
- R 1 represents any one of hydrogen, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, and an aryl group having 6 to 15 carbon atoms, and a plurality of R 1 are the same or different.
- R 2 represents any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, an acyl group having 2 to 6 carbon atoms, and an aryl group having 6 to 15 carbon atoms, and a plurality of R 2 may be the same or different.
- n represents an integer of 0 to 3.
- the mask layer can be prevented from disappearing due to oxidative decomposition even in a high-temperature process such as thermal diffusion of the dopant. Moreover, the mask property with respect to a dopant and crack resistance can be improved by making a silica particle coexist. Since silica particles have a high crosslinking density, the masking property of the mask layer can be increased.
- the polysiloxane component has a terminal capable of undergoing a crosslinking reaction involving hydrolysis, such as a silanol group and an unreacted alkoxy group, and the crosslinking reaction proceeds in a high temperature process. At that time, strain occurs due to volume shrinkage, and cracks occur when the strain is large. On the other hand, silica particles already have a high crosslinking density, and volume shrinkage hardly occurs even in a high temperature process. Therefore, the presence of silica particles can alleviate the accumulation of strain in the mask layer and improve the crack resistance.
- the present invention it is essential for the present invention to contain a solvent having a boiling point of 130 ° C. or higher. This is due to the following reason.
- a polymerization catalyst for the polysiloxane of the present invention it is preferable to use a hydrocarbon-based acid as a catalyst, and at this time, it is necessary to volatilize and remove so that catalyst components having an adverse effect on storage stability do not remain in the polysiloxane. . Therefore, it is necessary to control the polymerization system higher than the boiling point of the catalyst during the polymerization process.
- a catalyst such as phosphoric acid or a metal salt thereof may become an ion source that inhibits masking properties.
- the paste of the present application is applied to the substrate using various coating apparatuses, but it is essential to contain a solvent having a boiling point of 130 ° C. or higher from the viewpoint of suppressing the precipitation of the paste agent on nozzles, plates, pipes, rolls, and the like. It is.
- the solvent consists only of a solvent having a boiling point of less than 130 ° C
- the solid content of the paste is deposited in a short time in the exposed portion of the atmosphere, so that it does not re-dissolve by supplying a new paste, causing nozzle clogging, device contamination, and substrate contamination.
- P, B, and Al concentrations in the composition of the present invention are each 20 ppm or less, more preferably 1 ppm or less, and still more preferably 0.5 ppm or less. The lower the concentration, the better the mask property, and the better the mask property even with a thin film thickness.
- P, B, and Al are general dopant components. When these are present in a high concentration in the mask paste composition, these dopant components are thermally diffused to the substrate side during thermal diffusion, and the portion that should originally be masked is Since it is contaminated, it cannot function as a mask layer.
- the contents of P, B and Al are values measured by the following method.
- the measured value, Al is a value measured by combustion ion chromatography.
- the aryl group concentration of 6 to 15 carbon atoms in the solid content is preferably 15% by weight or more. This is because by introducing a bulky aryl group into the polysiloxane in advance and imparting steric hindrance, the crosslink density between the polysiloxane skeletons is reduced, resulting in a loose structure and cracking is more suppressed. is there.
- the loose structure here is a structure having a low crosslinking density and a high degree of freedom between skeletons.
- the bulky functional group in addition to the phenyl group, an alkyl group, an alkenyl group, and an alicyclic functional group can be considered, but in view of heat resistance, an aromatic group is preferable.
- an aromatic group is preferable.
- the crosslink density between the polysiloxane skeletons becomes small, there is a concern that the mask property is impaired, but the problem is solved by the introduction of silica particles as described above.
- the inclusion of a specific amount of aryl groups in the polysiloxane suppresses the occurrence of cracks in high-temperature processes, while the inclusion of silica particles with excellent masking properties makes it possible to loosen the structure due to the inclusion of phenyl groups. It compensates for the accompanying deterioration in mask properties and achieves both excellent crack resistance and mask properties.
- the upper limit of the C6-C15 aryl group concentration in the solid content is preferably 60% by weight or less, and more preferably 50% by weight or less.
- the aryl group concentration refers to the concentration of the aryl group itself.
- the phenyl group portion disubstituted molecular weight 76 is used. Represents the concentration.
- the aryl group concentration can be adjusted by the type of organosilane represented by the general formula (1) and the amount of reaction charged.
- the aryl group concentration of the mask paste composition can be determined, for example, by obtaining structural information about what functional groups are contained in the composition by Si-NMR, H-NMR, IR, etc. It can be estimated by quantitatively determining the amount of each functional group by Raman spectroscopy. Quantitative performance can be improved by combining preparative treatment such as HPLC preparative as necessary.
- the alkyl group, alkenyl group, and aryl group in R 1 of the general formula (1) may be either unsubstituted or substituted, and can be selected according to the characteristics of the composition.
- Specific examples of the alkyl group include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, t-butyl group, n-hexyl group, n-decyl group, trifluoromethyl group, 3, 3 , 3-trifluoropropyl group, 3-glycidoxypropyl group, 2- (3,4-epoxycyclohexyl) ethyl group, [(3-ethyl-3-oxetanyl) methoxy] propyl group, 3-aminopropyl group, Examples include 3-mercaptopropyl group and 3-isocyanatopropyl group.
- alkenyl group examples include a vinyl group, a 3-acryloxypropyl group, and a 3-methacryloxypropyl group.
- aryl group examples include phenyl group, tolyl group, p-hydroxyphenyl group, p-styryl group, p-methoxyphenyl group, 1- (p-hydroxyphenyl) ethyl group, 2- (p-hydroxyphenyl). Examples thereof include an ethyl group, 4-hydroxy-5- (p-hydroxyphenylcarbonyloxy) pentyl group, and naphthyl group.
- the alkyl group, acyl group and aryl group in R 2 of the general formula (1) may be either unsubstituted or substituted, and can be selected according to the characteristics of the composition.
- Specific examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, and an n-butyl group.
- Specific examples of the acyl group include an acetyl group.
- Specific examples of the aryl group include a phenyl group.
- N in the general formula (1) represents an integer of 0 to 3.
- organosilane represented by the general formula (1) include tetrafunctional silanes such as tetramethoxysilane, tetraethoxysilane, tetraacetoxysilane, and tetraphenoxysilane, methyltrimethoxysilane, methyltriethoxysilane, and methyl.
- the polysiloxane used in the present invention preferably contains an aryl group having 6 to 15 carbon atoms.
- silane compound containing an aryl group having 6 to 15 carbon atoms examples include phenyltrimethoxysilane, phenyltriethoxysilane, p-hydroxyphenyltrimethoxysilane, p-tolyltrimethoxysilane, p-styryltrimethoxysilane, and p-methoxy.
- the constituent component of the polysiloxane other than the particles is only an aryl group-containing silane compound from the viewpoint of heat resistance and crack resistance.
- the aryl group content in the solid content of the mask paste composition is more preferably 20% by weight or more, and most preferably 25% by weight or more. When the aryl group content is smaller than this amount, the crack-resistant film thickness in the high temperature process becomes low.
- the polysiloxane is composed only of those having no aryl group having 6 to 15 carbon atoms. It is also a preferable aspect to use. That is, R 1 in the general formula (1) is preferably any one of hydrogen, an alkyl group having 1 to 10 carbon atoms, or an alkenyl group having 2 to 10 carbon atoms.
- organosilane in this case include tetrafunctional silanes such as tetramethoxysilane, tetraethoxysilane, and tetraacetoxysilane, methyltrimethoxysilane, methyltriethoxysilane, methyltriisopropoxysilane, and methyltri-n-butoxysilane.
- tetrafunctional silanes such as tetramethoxysilane, tetraethoxysilane, and tetraacetoxysilane, methyltrimethoxysilane, methyltriethoxysilane, methyltriisopropoxysilane, and methyltri-n-butoxysilane.
- the weight average molecular weight (Mw) of the polysiloxane used in the present invention is 1000 or more in terms of polystyrene measured by GPC (gel permeation chromatography).
- Mw weight average molecular weight
- the reactive end groups of siloxane, which is the main component increase, resulting in poor storage stability.
- the leaving group at the time of baking increases, baking distortion is large and crack resistance also deteriorates.
- a larger Mw is preferable because storage stability is improved.
- the filter permeability in the coating process is deteriorated, and in the case of having a mask layer peeling step, the solubility in the peeling solution may be deteriorated.
- the upper limit of Mw is preferably less than 100,000, more preferably less than 50000, and most preferably less than 20000.
- the molecular weight of the polysiloxane component is high, and it is important that the weight average molecular weight of the polysiloxane is 1000 or more.
- the weight average molecular weight of the polysiloxane is the weight average molecular weight as a copolymer when the polysiloxane is bonded to the silica particles.
- the mask paste composition of the present invention contains silica particles having an average particle diameter of 150 nm or less.
- the average particle diameter in the present invention means the number average particle diameter.
- the number average particle diameter of the silica particles is preferably 2 nm or more, more preferably 3 nm or more, still more preferably 5 nm or more as the lower limit, and the upper limit is preferably 125 nm or less, more preferably 100 nm or less. If it is larger than 150 nm, the film thickness uniformity and masking properties of the cured film will be reduced. On the other hand, when the thickness is 2 nm or more, the effect of improving crack resistance is further increased.
- the number average particle diameter of the silica particles is assumed to be a sphere after the silica particles are dried and calcined and the specific surface area of the obtained particles is measured when the particles can be isolated from the composition.
- the particle diameter is obtained from the specific surface area, and the average particle diameter is obtained as a number average.
- Asap 2020 made by Micromeritics
- it is difficult to isolate a cured film, etc. take a SEM photograph of the film cross-section or film surface in the cured film, randomly select 50 granular materials, measure the particle diameter, The diameter can be determined.
- silica particles in the paste composition, it is possible to suppress the spread of the liquid when applied to the substrate to the substrate and to obtain excellent coating patterning accuracy.
- an IP having a particle diameter of 12 nm using isopropanol as a dispersion medium As a specific example of the silica particles, an IP having a particle diameter of 12 nm using isopropanol as a dispersion medium.
- Cataloid-S (trade name, manufactured by Catalytic Kasei Kogyo Co., Ltd.), propylene glycol monomethyl ether as a dispersion medium, particle diameter of 16 nm Quatron PL-2L-PGME, ⁇ -butyrolactone as a dispersion medium 17nm Quartron PL-2L-BL, particles using diacetone alcohol as dispersion medium Quortron PL-2L-DAA with a diameter of 17 nm, Quartron PL-2L with a particle diameter of 18 to 20 nm in which the dispersion solution is water, Quattron PL-1 with a particle diameter of 15 nm, Quattron PL-3 with a particle diameter of 35 nm, Quartron with a particle diameter of 75 nm PL-7, GP-2L with a particle size of 18 nm (above, trade name, manufactured by Fuso Chemical Industry Co., Ltd.), Reolosil (product name, manufactured by Tokuyama Co
- the content of silica particles in the mask paste composition of the present invention is 20% by weight or more in the solid content, more preferably 30% by weight or more, and most preferably 40% by weight or more.
- the upper limit is 70% by weight or less.
- the silica particles may be a blend component that does not bind to the polysiloxane, or may bind to the polysiloxane.
- the method for forming a bond between the silica particles and the polysiloxane is not particularly limited, but the silica particles are allowed to coexist in the polysiloxane condensation reaction step, and the reaction is performed in parallel with the polymerization reaction with the condensation reaction.
- a method in which polysiloxane and silica particles coexist and a condensation reaction of terminal silanol groups with each other by heating is preferably applied.
- the polysiloxane of the present invention can be obtained by hydrolyzing an organosilane compound and then subjecting the hydrolyzate to a condensation reaction in the presence of a solvent or without a solvent.
- Various conditions for the hydrolysis reaction for example, acid concentration, reaction temperature, reaction time, etc., can be appropriately set in consideration of the reaction scale, reaction vessel size, shape, etc.
- an organosilane compound It is preferable to add an acid catalyst and water over 1 to 180 minutes and then react at room temperature to 110 ° C. for 1 to 180 minutes. By performing the hydrolysis reaction under such conditions, a rapid reaction can be suppressed.
- the reaction temperature is more preferably 30 to 130 ° C.
- Acid catalysts include hydrochloric acid, hydrobromic acid, hydroiodic acid and other halogenated inorganic acids, sulfuric acid, nitric acid, phosphoric acid, hexafluorophosphoric acid, hexafluoroantimonic acid, boric acid, tetrafluoroboric acid, Other inorganic acids such as chromic acid, methanesulfonic acid, ethanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid, sulfonic acid such as trifluoromethanesulfonic acid, acetic acid, citric acid, formic acid, gluconic acid, lactic acid, oxalic acid, Examples thereof include carboxylic acids such as tartaric acid, pyruvic acid, citric acid, succinic acid, fumaric acid and malic acid.
- the acid catalyst of the present invention preferably contains no atoms other than silicon, hydrogen, carbon, oxygen, nitrogen and sulfur from the viewpoint of masking properties, and it is preferable to use a carboxylic acid-based or sulfonic acid-based acid catalyst.
- carboxylic acid-based or sulfonic acid-based acid catalyst those having a low boiling point of 120 ° C. or lower such as formic acid and acetic acid are more preferable from the viewpoint of removability.
- the content of the acid catalyst is preferably 0.1 to 5 parts by weight with respect to 100 parts by weight of the total organosilane compound used in the hydrolysis reaction.
- the condensation reaction After obtaining the silanol compound by the hydrolysis reaction of the organosilane compound, it is preferable to carry out the condensation reaction by heating the reaction solution as it is at 50 ° C. or higher and below the boiling point of the solvent for 1 to 100 hours. In order to increase the degree of polymerization of the polysiloxane, reheating or a base catalyst may be added.
- the solvent include methanol, ethanol, propanol, isopropanol, butanol, isobutanol, t-butanol, 1-methoxy-2-propanol, pentanol, 4-methyl-2-pentanol, 3-methyl-2- Alcohols such as butanol, 3-methyl-3-methoxy-1-butanol, 1-t-butoxy-2-propanol and diacetone alcohol; glycols such as ethylene glycol and propylene glycol; ethylene glycol monomethyl ether, ethylene glycol mono Ethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol t-butyl ether, propylene glycol n- Cyl ether Ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethyl ether, di
- the acid catalyst is heated to the boiling point of the catalyst or more and removed, and a solvent having a boiling point of 130 ° C. or more is preferred, and its solubility and coating properties.
- Diethylene glycol methyl ethyl ether (bp 176 ° C), ethylene glycol monoethyl ether acetate (bp 156.4 ° C), ethylene glycol monomethyl ether acetate (bp 145 ° C), methyl lactate (bp 145 ° C), ethyl lactate ( bp 155 ° C), diacetone alcohol (bp 169 ° C), propylene glycol monomethyl ether acetate (bp 145 ° C), 3-methoxy-3-methyl-1-butanol (bp 174 ° C), dipropylene glycol monomethyl ether (bp 188 ° C.), dipropylene glycol-n-butyl ether (bp 229 ° C.), ⁇ -butyrolactone (bp 204 ° C.), diethylene glycol monoethyl ether acetate (bp 217 ° C.), butyl diglycol acetate (bp 246 ° C
- a solvent When a solvent is generated by a hydrolysis reaction, it can be hydrolyzed without solvent. It is also preferable to adjust the concentration of the resin composition to an appropriate level by adding a solvent after completion of the reaction. Further, after hydrolysis according to the purpose, an appropriate amount of the produced alcohol may be distilled and removed under heating and / or reduced pressure, and then a suitable solvent may be added.
- the amount of the solvent used in the hydrolysis reaction is preferably 80 parts by weight or more and 500 parts by weight or less with respect to 100 parts by weight of the total organosilane compound.
- the water used for the hydrolysis reaction is preferably ion-exchanged water.
- the amount of water can be arbitrarily selected, but it is preferably used in the range of 1.0 to 4.0 mol with respect to 1 mol of Si atoms.
- the mask paste composition of the present invention may contain a solvent other than the solvent used in the hydrolysis and condensation reaction as long as the effects of the present invention are not impaired.
- the mixed solvent is preferably selected from the solvents described above, and a single solvent system or a combination of two or more solvents may be used.
- the mask paste composition of the present invention preferably contains sulfonic acid or a salt thereof, or carboxylic acid or a salt thereof.
- Carboxylic acid or its salts include formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, palmitic acid, margaric acid, stearic acid, Trifluoroacetic acid, oleic acid, linoleic acid, linolenic acid, araguidonic acid, docosahexaenoic acid, eicosapentanoic acid, lactic acid, malic acid, citric acid, benzoic acid, phthalic acid, isophthalic acid, terephthalic acid, salicylic acid, gallic acid, melitto Examples include various carboxylic acids such as acid, cinnamic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, fumaric acid, maleic acid, pyruvic
- sulfonic acid or a salt thereof examples include sulfuric acid, methanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid, fluorosulfonic acid, 10 camphorsulfonic acid, taurine and other sulfonic acids, and metal salts thereof.
- the particles may aggregate during pre-baking or firing under high-temperature curing conditions, depending on the stability and mobility of the particles. .
- the aggregation of particles occurs, the film surface becomes rough, the film thickness is not constant, and the mask performance is remarkably deteriorated. This is because the fluidity of the siloxane composition increases at high temperatures. Therefore, in the present invention, by containing these carboxylic acid compounds and sulfonic acid compounds, the crosslinking reaction between the silanol groups of the silica particles and the polysiloxane is promoted at the timing when the fluidity of the siloxane composition is increased under high temperature curing conditions. In addition, the flow of particles is suppressed and aggregation can be suppressed.
- the addition amount of these carboxylic acid compounds and sulfonic acid compounds is preferably 0.1% by weight or more with respect to the solid content. If the added amount is less than 0.1% by weight, curing is not sufficient.
- the upper limit is not particularly limited, but if it exceeds 5% by weight, crosslinking proceeds at room temperature and storage stability is lowered, which is not preferable.
- these carboxylic acid compounds and sulfonic acid compounds may be used alone or in combination of two or more. In that case, it is preferable to contain 0.1 weight% or more in total amount.
- the mask paste composition of the present invention has a silane coupling agent, a crosslinking agent, a sensitizer, a thermal radical generator, a dissolution accelerator, a dissolution inhibitor, a surfactant, a sensitizer, and the like, as long as the effects of the present invention are not impaired.
- Various additives such as a sticking agent, a stabilizer, an antifoaming agent, and metal compound particles other than silica particles can also be contained.
- silane coupling agent examples include dimethyldimethoxysilane, dimethyldiethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacrylate.
- the addition amount of the silane coupling agent is not particularly limited, but when used, it is preferably in the range of 0.1 to 10 parts by weight with respect to 100 parts by weight of polysiloxane and particle solid content. If the addition amount is less than 0.1 parts by weight, the effect of improving the adhesion is not sufficient, and if it is more than 10 parts by weight, the silane coupling agents undergo a condensation reaction during storage, causing gelation.
- the mask paste composition of the present invention may contain a surfactant.
- a surfactant By containing the surfactant, coating unevenness is improved and a uniform coating film is obtained. Fluorine surfactants and silicone surfactants are preferably used.
- fluorosurfactant examples include 1,1,2,2-tetrafluorooctyl (1,1,2,2-tetrafluoropropyl) ether, 1,1,2,2-tetrafluorooctyl. Hexyl ether, octaethylene glycol di (1,1,2,2-tetrafluorobutyl) ether, hexaethylene glycol (1,1,2,2,3,3-hexafluoropentyl) ether, octapropylene glycol di (1 , 1,2,2-tetrafluorobutyl) ether, hexapropylene glycol di (1,1,2,2,3,3-hexafluoropentyl) ether, sodium perfluorododecyl sulfonate, 1,1,2,2 , 8,8,9,9,10,10-decafluorododecane, 1,1,2,2,3,3-hexafluorodecane, N- [3- (Perf Oloocty
- silicone surfactants include SH28PA, SH7PA, SH21PA, SH30PA, ST94PA (all manufactured by Toray Dow Corning Silicone), BYK067A, BYK310, BYK322, BYK331, BYK333, BYK355 (BIC Chemie Japan) Etc.).
- the content of the surfactant is generally 0.0001 to 1% by weight in the mask paste composition.
- the solid content concentration is not particularly limited, but is preferably 2 to 50% by weight. If it is lower than this concentration range, the coating film thickness becomes too thin and it is difficult to obtain a desired mask property, and if it is higher than this concentration range, the storage stability decreases.
- the mask paste composition of the present invention is a non-photosensitive composition that is applied on the entire surface or patterned by various coating methods and cured by heat to form a mask layer.
- a spin coating method As a coating method, a spin coating method, a roll coating printing method, a spray printing method, a relief printing method, an intaglio printing method, a screen printing method, an ink jet printing method, a slit printing method, and the like are applied onto a base substrate such as a silicon substrate. Can be applied.
- Various plates and nozzles can be used for coating.
- a slit coating method in which a slit nozzle is divided into a plurality of nozzles and a plurality of lines are applied in stripes can be preferably used.
- the preferred coating patterning method of the mask paste composition of the present invention is not particularly limited, but may be a screen printing method because of the freedom of pattern design and ease of nozzle maintenance.
- the viscosity of the mask paste composition is preferably 3000 mPa ⁇ s or more. Since the paste viscosity is 3000 mPa ⁇ s or more, it is easy to control the coating on the screen plate and the amount of coating liquid permeated through the mesh part of the screen plate, and the coating liquid is difficult to spread after grounding on the coating substrate. Accuracy is improved. More preferably, it is 5000 mPa ⁇ s or more, and most preferably 10,000 mPa ⁇ s or more. Although there is no particular upper limit, it is preferably less than 100,000 mPa ⁇ s from the viewpoint of liquid handling.
- the viscosity is a value measured with a B-type digital viscometer based on JIS Z 8803 (1991) “Solution Viscosity—Measurement Method”.
- the thickening agent include polyvinyl pyrrolidone, polyvinyl butyral, polyvinyl alcohol, polyvinyl acetate, various cellulose compounds such as methyl cellulose, ethyl cellulose, and nitrocellulose, acrylate resins such as polymethyl methacrylate, polyethylene oxide, and polypropylene oxide.
- one or more thickeners selected from acrylic ester resins, polyethylene oxide, and polypropylene oxide are particularly preferable. It is because there is no baking residue at the time of siloxane curing, and there is no decrease in crack resistance and masking properties.
- acrylic ester resins include polymethyl methacrylate, polyethyl methacrylate, polypropyl methacrylate, polybutyl methacrylate, polymethyl acrylate, polyethyl acrylate, polypropyl acrylate, polybutyl acrylate, polyhydroxyethyl
- acrylic ester component may be 60 mol% or more as a polymerization ratio, and other copolymerizable components such as polyacrylic acid and polystyrene may be copolymerized.
- polyethylene oxide and polypropylene oxide these two types of copolymers are also preferred.
- Acrylic ester resins, polyethylene oxide, and polypropylene oxide are all preferably those having a weight average molecular weight of 100,000 or more because they have a high thickening effect. You may use these in combination of multiple types.
- the content of these thickeners is preferably 1% by weight or more in the composition from the viewpoint of the thickening effect, and more preferably 10% by weight or less from the viewpoint of suppression of firing residue, crack resistance, and mask performance.
- the coated substrate is pre-baked with a heating device such as a hot plate or oven.
- Pre-baking is performed in the range of 50 ° C. to 150 ° C. for 30 seconds to 30 minutes, and the film thickness after pre-baking is preferably 0.05 to 10 ⁇ m.
- the mask layer is formed by curing for 30 minutes to 2 hours in the range of 400 ° C. to 1200 ° C. with a heating device such as a hot plate or oven. It is also preferable to perform middle baking for about 10 minutes to 2 hours between 200 ° C. and 250 ° C. between pre-baking and curing.
- These pre-baked, Midorubeiku, curing can be carried out under N 2, O 2 under N 2 / O 2 under known conditions such as an air atmosphere.
- the present invention it is preferable to include a step of heating for 5 minutes or more in a temperature range of 400 ° C. to 900 ° C. in an atmosphere having an oxygen concentration of 5% or more in the curing step. More preferably, it includes a step of heating for 5 minutes or more in a temperature range of 500 ° C. or more and 800 ° C. or less in an atmosphere having an oxygen concentration of 5% or more.
- the thermal decomposition of the polysiloxane or the thickener component is promoted, so that the peeling residue can be reduced in the step of removing the cured film.
- the oxygen concentration and the temperature range are satisfied for 5 minutes or more in the temperature raising process and the temperature lowering process even if the temperature is not constant. It is also preferable to control outside the oxygen concentration range and the temperature range.
- the mask paste composition of the present invention is preferably applied to the entire surface of the substrate.
- a mask pattern can be selectively formed by screen printing, ink jet printing or the like, or newly applied after applying the entire surface on the substrate by spin coating or the like. It is also preferable to apply a photosensitive mask paste to the upper layer and selectively remove a portion corresponding to the doping region by, for example, a well-known photolithography method and etching method to form a mask pattern. After forming the mask layer of the present invention, it is also preferable to use it as it is as a protective film without peeling off the mask layer.
- the substrate is pre-baked or baked by a heating device such as a hot plate or oven, and then the doping paste is selectively applied to the entire surface or an area where the mask paste is not applied, It is also preferable that the substrate is baked and thermally diffused to selectively diffuse the impurity in the semiconductor substrate. Thereafter, it is also preferable to form a semiconductor element in which the doping region is patterned by removing the mask layer and the hardened layer of the doping paste with a release agent such as hydrofluoric acid.
- a heating device such as a hot plate or oven
- a semiconductor element can be manufactured.
- a method for forming an impurity diffusion layer using the present mask paste and a method for manufacturing a semiconductor element using the impurity diffusion layer will be described using a method for manufacturing a solar cell, which is a kind of photoelectric conversion element, as an example.
- a mask paste composition is selectively applied on an N-type semiconductor substrate 10 to form a striped mask pattern 12.
- the coating method include a method of applying a mask paste using a slit coating method composed of a plurality of nozzles, an ink jet printing method, a screen printing method, a letterpress printing method, an intaglio printing method, a roll coat printing method and a spray printing method. It is done.
- the mask paste is cured by baking to form a mask pattern 12.
- the baking includes a step of heating for 5 minutes or more in a temperature range of 400 ° C. or more and 900 ° C. or less in an atmosphere having an oxygen concentration of 5% or more.
- a P-type doping pattern 14 and an N-type doping pattern 16 are selectively formed on the semiconductor substrate 10 between the mask patterns 12.
- the same method as that for the mask pattern can be used.
- the semiconductor substrate 10 is baked to diffuse each doping component into the semiconductor substrate 10. In this way, the P-type impurity diffusion layer 24 and the N-type impurity diffusion layer 26 are formed.
- the mask pattern 12, the P-type doping pattern 14 and the N-type doping pattern 16 are stripped and removed using a stripping agent such as hydrofluoric acid.
- a passivation film 18 is provided on the surface of the semiconductor substrate 10 by thermal oxidation or the like. Further, a silicon nitride film 20 having an effect of preventing sunlight reflection is formed on a surface opposite to the side on which the passivation film is formed by a known method.
- the passivation film 18 is selectively removed, and contact holes are formed so that predetermined regions of the P-type impurity diffusion layer 24 and the N-type impurity diffusion layer 26 are exposed. Then, the contact hole is filled with a desired metal by, for example, an electrolytic plating method and an electroless plating method, and the electrodes 22 electrically connected to the P-type impurity diffusion layer 24 and the N-type impurity diffusion layer 26 are formed.
- the solar cell according to the present embodiment can be manufactured through the above steps.
- the mask paste composition of the present invention is a semiconductor device that patterns p-type and / or n-type regions on the semiconductor surface in addition to photovoltaic semiconductors such as solar cells, such as transistor arrays, diode arrays, photodiode arrays, It can also be applied to transducers.
- GBL ⁇ -butyrolactone (bp 205 ° C.)
- IPA isopropyl alcohol (bp 82 ° C)
- MMB 3-methoxy-3-methyl-1-butanol (bp 174 ° C.)
- 1,3BGDA 1,3-butylene glycol diacetate (bp 232 ° C.)
- EDM Diethylene glycol methyl ethyl ether (bp 176 ° C.)
- PGME 1-methoxy-2-propanol (bp 118 ° C)
- PGMEA Propylene glycol monomethyl ether acetate (bp 145 ° C)
- PTB propylene glycol t-butyl ether (bp 151 ° C.)
- PEO Polyethylene oxide
- PMMA Polymethyl methacrylate
- PPO Polypropylene oxide
- PVP Polyvinylpyrrolidone.
- Weight average molecular weight measurement The weight average molecular weight of polysiloxane was obtained by filtering a sample with a membrane filter having a pore size of 0.45 ⁇ m and then GPC (HLC-8220GPC manufactured by Tosoh Corporation) (developing solvent: tetrahydrofuran, developing speed: 0.4 ml / Minutes) and calculated in terms of polystyrene.
- B For B, weigh the sample in a platinum crucible, add ethanol, burn it in a sealed stainless steel container filled with oxygen, absorb the product gas in an aqueous sodium hydroxide solution, neutralize it by adding nitric acid. Constant volume. About this constant volume liquid, the quantitative analysis of B was performed by ICP emission-spectral-analysis method (SPS3000 by SII nanotechnology Co., Ltd.).
- the content in the composition was measured by a combustion ion chromatograph method (AQF-100 manufactured by Mitsubishi Chemical Analytech Co., Ltd.).
- a semiconductor substrate made of n-type single crystal silicon having a side of 100 mm was prepared, and both surfaces were subjected to alkali etching in order to remove slice damage and natural oxides.
- innumerable irregularities having a typical width of about 40 to 100 ⁇ m and a depth of about 3 to 4 ⁇ m were formed on both surfaces of the semiconductor substrate, and this was used as a coated substrate.
- FIG. 2 shows a schematic diagram of the stripe coating apparatus used in this example.
- a mask paste was applied to the semiconductor substrate 31 vacuum-adsorbed on the stage 32 by moving the nozzle 38 in the Y direction.
- a paste 43 made of a mask paste composition is discharged from a plurality of discharge ports 42 formed below the nozzle 41 to form a bead 44 between the semiconductor substrate 40 and the discharge ports 42.
- the nozzle 41 was moved in the direction perpendicular to the paper surface.
- the substrate After applying the stripe of this mask paste, the substrate is heated in air at 100 ° C. for 5 minutes and further at 230 ° C. for 30 minutes, so that the mask pattern has a thickness of about 1.0 ⁇ m, a width of 240 ⁇ m, a pitch of 600 ⁇ m, and a length of 8 cm. Formed.
- the line width was measured at 10 points at equal intervals, and when the standard deviation ⁇ of the coating width was within 10 ⁇ m, the line width was determined to be good, and the line width exceeding 10 ⁇ m was determined to be bad.
- a semiconductor substrate made of n-type single crystal silicon having a side of 100 mm was prepared, and both surfaces were subjected to alkali etching in order to remove slice damage and natural oxides.
- innumerable irregularities having a typical width of about 40 to 100 ⁇ m and a depth of about 3 to 4 ⁇ m were formed on both surfaces of the semiconductor substrate, and this was used as a coated substrate.
- an unpolished semiconductor substrate made of n-type single crystal silicon with a side of 100 mm was used as the coated substrate. Innumerable irregularities having a typical width of 40 to 100 ⁇ m and a depth of 3 to 4 ⁇ m were formed on the coated surface.
- the substrate is heated in air at 100 ° C. for 5 minutes, and further at 230 ° C. for 30 minutes. Formed.
- the line width was measured at 10 points at regular intervals for one central line, and those with a standard deviation of the coating width within 15 ⁇ m were judged good, and those over 15 ⁇ m were judged as bad.
- the mask paste was applied to the silicon wafer by a known spin coating method. Samples were prepared by changing the number of rotations and changing the film thickness every 0.1 ⁇ m after firing. In the thin film region, those diluted with the same solvent composition as the mask paste were used as appropriate. After application, each silicon wafer was pre-baked at 100 ° C. for 5 minutes. Thereafter, the pre-baked film thickness was measured with a surface shape measuring device (Surfcom 1400, manufactured by Tokyo Seimitsu Co., Ltd.).
- each silicon wafer was placed in an electric furnace, heated from 20 ° C. to 10 ° C./min in an air atmosphere, and then heated at 800 ° C. for 60 minutes to baked the mask composition. Thereafter, the film thickness after firing was measured. The surface was observed with an optical microscope equipped with a 5 ⁇ lens, and the film thickness after firing of the maximum mask layer film thickness sample in which no crack was observed was defined as the crack film thickness.
- the silicon wafer was immersed in pure water and washed, and the presence or absence of a residue was observed by visual inspection of the surface.
- Surface adhering can be confirmed visually after immersion for 10 minutes
- D with peeling residue
- Surface adhesion can be confirmed visually after immersion for 10 minutes, but can be removed by rubbing with waste.
- C for more than 5 minutes
- B no peeling residue
- A no peeling residue
- the surface resistance of the peeled silicon wafer was measured using a four-probe type surface resistance measuring device (RT-70V manufactured by Napson Corporation).
- a phosphorus-containing impurity diffusion solution is heated without a mask layer as a reference example.
- the resistance was increased to 2.1 ⁇ / ⁇ (P / N determination was P) and due to thermal diffusion of impurities.
- the silicon wafer after peeling is judged to have no masking property with a surface resistivity of 0.32 ⁇ / ⁇ (P / N judgment is P) or more, and the film thickness after baking of the minimum mask layer thickness sample with masking property is masked. The film thickness was taken.
- the difference between the crack film thickness and the mask film thickness indicates a margin that can be used as a mask material.
- the wider this margin the wider the applicable range and the better.
- Synthesis example 1 A 500 mL three-necked flask was charged with 198.29 g (1.0 mol) of phenyltrimethoxysilane and 239.63 g of MMB, and 3.80 g of formic acid was added to water (54.00 g) required for hydrolysis of the monomer while stirring at room temperature. A dissolved aqueous formic acid solution was added over 30 minutes. Thereafter, the flask was immersed in an oil bath at 70 ° C. and stirred for 1 hour, and then the temperature of the oil bath was raised to 150 ° C. over 30 minutes.
- the resulting polysiloxane had a weight average molecular weight (Mw) of 1500.
- Synthesis Example 1-2 A polysiloxane solution (A-2) was obtained in the same manner as in Synthesis Example 1-1 except that the reaction time after reaching the internal temperature of 100 ° C. was 3 hours.
- the weight average molecular weight (Mw) of the obtained polysiloxane was 4000.
- Synthesis Example 1-3 A polysiloxane solution (A-3) was obtained in the same manner as in Synthesis Example 1-1 except that the solvent was changed to 1,3BGDA instead of MMB. The resulting polysiloxane had a weight average molecular weight (Mw) of 1500.
- Synthesis Example 1-4 A polysiloxane solution (A-4) was obtained in the same manner as in Synthesis Example 1-1 except that the solvent was 1,3BGDA instead of MMB and the reaction time after reaching the internal temperature of 100 ° C. was 3 hours.
- the obtained polysiloxane had a weight average molecular weight (Mw) of 4,500.
- Synthesis Example 1-5 A polysiloxane solution (A-5) was obtained in the same manner as in Synthesis Example 1-1 except that the solvent was EDM instead of MMB and the reaction time after reaching the internal temperature of 100 ° C. was 3 hours.
- the obtained polysiloxane had a weight average molecular weight (Mw) of 3,500.
- Synthesis Example 1-6 A polysiloxane solution (A-6) was obtained in the same manner as in Synthesis Example 1-1 except that the solvent was GBL instead of MMB and the reaction time after reaching the internal temperature of 100 ° C. was 3 hours.
- the obtained polysiloxane had a weight average molecular weight (Mw) of 3,500.
- Synthesis Example 1-7 A polysiloxane solution (A-7) was obtained in the same manner as in Synthesis Example 1-1 except that PGMEA was used instead of MMB and the reaction time after reaching the internal temperature of 100 ° C. was 3 hours.
- the obtained polysiloxane had a weight average molecular weight (Mw) of 6,000.
- Synthesis Example 1-8 The reaction was carried out in the same manner as in Synthesis Example 1-1 except that 0.82 g of phosphoric acid was used instead of formic acid, and the reaction time after reaching the internal temperature of 100 ° C. was 3 hours to obtain a polysiloxane solution (A-8). It was. The obtained polysiloxane had a weight average molecular weight (Mw) of 4,500.
- Synthesis Example 1-9 A polysiloxane solution (A-9) was obtained in the same manner as in Synthesis Example 1-1 except that 16.00 g of boric acid was used instead of formic acid and the reaction time after reaching the internal temperature of 100 ° C. was used.
- the resulting polysiloxane had a weight average molecular weight (Mw) of 3000.
- Synthesis Example 1-10 A polysiloxane solution (A-10) was obtained in the same manner as in Synthesis Example 1-1 except that the solvent was PGME instead of MMB, and the reaction time after reaching the internal temperature of 100 ° C. was 3 hours.
- the obtained polysiloxane had a weight average molecular weight (Mw) of 4,500.
- Synthesis Example 1-11 A polysiloxane solution (A-11) was obtained in the same manner as in Synthesis Example 1-1 except that the amount of formic acid added was 0.5 g and the reaction time after reaching the internal temperature of 100 ° C. was 10 minutes.
- the obtained polysiloxane had a weight average molecular weight (Mw) of 500 or less.
- Synthesis Example 1-12 A polysiloxane solution (A-12) was obtained in the same manner as in Synthesis Example 1-1 except that the reaction time after reaching the internal temperature of 100 ° C. was changed to 5 hours.
- the obtained polysiloxane had a weight average molecular weight (Mw) of 7,500.
- the flask was immersed in an oil bath at 70 ° C. and stirred for 1 hour, and then the temperature of the oil bath was raised to 150 ° C. over 30 minutes.
- the internal temperature of the solution reached 100 ° C., and was then heated and stirred for 3 hours (the internal temperature was 100 to 138 ° C.).
- a total of 147.3 g of methanol, IPA, water and formic acid as by-products were distilled out.
- the obtained polysiloxane MMB solution was added to the obtained polysiloxane MMB solution so that the solid concentration of the polysiloxane was 40% by weight to obtain a polysiloxane solution (B-1).
- the obtained polysiloxane was a copolymer bonded to silica particles, and the weight average molecular weight (Mw) as the copolymer was 1500.
- Synthesis Example 2-2 The amount of monomer and solvent charged was 49.57 g (0.25 mol) of phenyltrimethoxysilane, 12.32 g (0.05 mol) of 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, and 24 of diphenyldimethoxysilane. .44 g (0.10 mol), a polysiloxane solution (B-2) as in Synthesis Example 2-1, except that PL-2L-IPA was 141.92 g (converted to 0.60 mol SiO 2 ) and MMB was 155.86 g. ) The obtained polysiloxane was a copolymer bonded to silica particles, and the weight average molecular weight (Mw) as the copolymer was 2300.
- Mw weight average molecular weight
- Synthesis Example 2-3 Synthesis example except that the amount of monomers and solvent charged was 109.06 g (0.55 mol) of phenyltrimethoxysilane, 106.44 g of PL-2L-IPA (converted to 0.45 mol SiO 2 ), and GBL of 168.87 g.
- a polysiloxane solution (B-3) was obtained in the same manner as in 2-1.
- the obtained polysiloxane was a copolymer bonded to silica particles, and the weight average molecular weight (Mw) as the copolymer was 2100.
- Synthesis example 3 The amount of monomer and solvent charged was 123.93 g (0.625 mol) of phenyltrimethoxysilane, 30.80 g (0.125 mol) of 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, and 61 of diphenyldimethoxysilane. 0.09 g (0.25 mol), MMB was 270.74 g, and a polysiloxane solution C was obtained in the same manner as in Synthesis Example 1 except that the reaction time after reaching the internal temperature of 100 ° C. was 3 hours. The obtained polysiloxane had a weight average molecular weight (Mw) of 5,500.
- Mw weight average molecular weight
- Synthesis example 4 A polysiloxane solution D was obtained in the same manner as in Synthesis Example 1 except that the amounts of monomers and solvent were 224.30 g (1.0 mol) of p-styryltrimethoxysilane and 278.64 g of MMB. The weight average molecular weight (Mw) of the obtained polysiloxane was 4000.
- Synthesis example 5 A polysiloxane solution E was obtained in the same manner as in Synthesis Example 1 except that the amounts of monomers and solvent were changed to 212.30 g (1.0 mol) of p-tolyltrimethoxysilane and 254.32 g of MMB. The weight average molecular weight (Mw) of the obtained polysiloxane was 4000.
- Synthesis Example 6 A polysiloxane solution F was obtained in the same manner as in Synthesis Example 1, except that the amount of monomer and solvent was 228.32 g (1.0 mol) of 4-methoxyphenyltrimethoxysilane and 284.68 g of MMB. The weight average molecular weight (Mw) of the obtained polysiloxane was 4000.
- Synthesis example 7 A polysiloxane solution G was obtained in the same manner as in Synthesis Example 1 except that the amounts of monomers and solvent were 248.35 g (1.0 mol) of 1-naphthyltrimethoxysilane and 308.38 g of MMB. The obtained polysiloxane had a weight average molecular weight (Mw) of 4,500.
- Synthesis example 8 Monomer and solvent were charged in the same manner as in Synthesis Example 1 except that methyltrimethoxysilane was 90.80 g (0.67 mol), phenyltrimethoxysilane was 66.09 g (0.33 mol), and MMB was 171.20 g. A polysiloxane solution H was obtained. The weight average molecular weight (Mw) of the obtained polysiloxane was 4000.
- Synthesis Example 9 A polysiloxane solution I was obtained in the same manner as in Synthesis Example 1 except that monomer and solvent were charged in an amount of 164.22 g (1.0 mol) of propyltrimethoxysilane and 198.52 g of GBL. The obtained polysiloxane had a weight average molecular weight (Mw) of 4,500.
- Example of synthesis of solvent-dispersed product of particle dispersion liquid 200 g PL-2L-IPA and 150 g MMB were added to an eggplant flask for decompression, and about 150 g distillate was obtained in a trap while reducing pressure with an evaporator in a 40 ° C. water bath. Then, 150 g of MMB was further added. By reducing the pressure again in the bath, PL-2L (MMB-substituted product) having the same solid content as PL-2L-IPA and having the solvent replaced with MMB was obtained.
- a PL-2L 1,3-BGDA replacement product By using a solvent other than MMB in the same manner as described above, a PL-2L 1,3-BGDA replacement product, an EDM replacement product, a GBL replacement product, a PGMEA replacement product, and a PTB replacement product were obtained.
- PL-3-IPA Feuso Chemical Industry Co., Ltd., colloidal silica, IPA dispersion, silica average particle size 35 nm, silica concentration 17.0% by weight
- 1,3 BGDA replacement product 1,3 BGDA replacement product
- PL-7 Feuso Chemical Industry ( Colloidal silica manufactured by water dispersion, average particle diameter 75 nm, silica concentration 23.0 wt% MMB replacement
- PL-20 Feuso Chemical Co., Ltd. colloidal silica water dispersion, average particle diameter 220 nm, silica An MMB-substituted product having a concentration of 20.0% by weight was obtained.
- Example 1 PL-2L (MMB substituted product) is blended with the polysiloxane solution A-1 so that the molar ratio of the monomer is 30 mol% of polysiloxane / 70 mol% of PL-2L, so that the solid content concentration is 25%. MMB was added. Here, the PL-2L monomer molar ratio of the silica particles was calculated using SiO 2 as the monomer unit. Further, SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition.
- Example 2 PL-2L (MMB substituted product) is blended with the polysiloxane solution A-2 so that the molar ratio of the monomer is 30 mol% of polysiloxane / 70 mol% of PL-2L, so that the solid content concentration is 25 wt%. MMB was added. Here, the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 3 PL-3 (1,3BGDA substituted product) was blended with the polysiloxane solution A-3 so that the monomer molar ratio was 30 mol% polysiloxane / 70 mol% PL-2L, and the solid content concentration was 25 wt%. 1,3BGDA was added so that.
- the monomer molar ratio of PL-3 was calculated using SiO 2 as a monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 4 To the polysiloxane solution B-1, MMB is added so that the solid content concentration is 25% by weight, and Sun-Aid SI-200 (manufactured by Sanshin Chemical Industry Co., Ltd.) is added so that the solid content is 0.5% by weight. , Mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Sun-Aid SI-200 manufactured by Sanshin Chemical Industry Co., Ltd.
- Example 5 PL-2L (1,3BGDA substituted product) was blended with the polysiloxane solution A-4 so that the monomer molar ratio was 20 mol% polysiloxane / 80 mol% PL-2L, and the solid content concentration was 25% by weight. 1,3BGDA was added so that.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 6 PL-2L (1,3BGDA substituted product) was blended with the polysiloxane solution A-4 so that the monomer molar ratio was 60 mol% polysiloxane / 40 mol% PL-2L, and the solid content concentration was 25% by weight. 1,3BGDA was added so that.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 7 PL-2L (MMB-substituted product) is blended with the polysiloxane solution A-2 so that the monomer molar ratio is 40 mol% polysiloxane / 60 mol% PL-2L, so that the solid content concentration is 25 wt%. MMB was added. Here, the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit. Further, MegaFuck F444 (perfluoroalkylethylene oxide adduct manufactured by DIC Corporation) was added and mixed and dissolved so as to be 500 ppm with respect to the entire composition. Further, SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 8 Polysiloxane solution A-5 was blended with PL-2L-PGME (colloidal silica PGME dispersion, manufactured by Fuso Chemical Industry Co., Ltd., average particle size 17 nm) in a monomer molar ratio of polysiloxane 40 mol% / PL-2L 60 mol%.
- PGME and EDM were added so that the solvent composition of the composition was PGME70 / EDM30 (weight ratio) and the solid content concentration was 25% by weight.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 9 PL-2L (GBL substituted product) is blended with the polysiloxane solution A-6 so that the molar ratio of the monomer is 40 mol% of polysiloxane / 60 mol% of PL-2L, so that the solid content concentration is 25 wt%.
- GBL was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- polypropylene glycol PPG4000 molecular weight 4000, diol type
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 10 PL-2L (1,3BGDA substituted product) was blended with the polysiloxane solution A-4 so that the monomer molar ratio was 40 mol% polysiloxane / 60 mol% PL-2L, and the solid content concentration was 25 wt%. 1,3BGDA was added so that. Furthermore, BYK333 (Bic Chemie Co., Ltd. polyether-modified polydimethylsiloxane) was added and mixed and dissolved so as to be 500 ppm with respect to the entire composition. Further, SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 11 PL-2L (MMB-substituted product) is blended with the polysiloxane solution A-2 so that the monomer molar ratio is 40 mol% polysiloxane / 60 mol% PL-2L, so that the solid content concentration is 25 wt%. MMB was added. Here, the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit. Furthermore, BYK355 (Bic Chemie Co., Ltd. acrylic leveling agent) was added and mixed and dissolved so that it might become 500 ppm with respect to the whole composition. Further, SI-200 was added so as to be 0.1% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 12 PL-2L (PTB substitution product) was blended with the polysiloxane solution A-7 so that the monomer molar ratio was 40 mol% polysiloxane / 60 mol% PL-2L, and the solvent composition of the composition was PTB 60 / PGMEA 40 ( PTB and PGMEA were added so that the solid content concentration was 25% by weight.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 1% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 13 PL-2L (MMB-substituted product) was blended with the polysiloxane solution C so that the monomer molar ratio was 40 mol% polysiloxane / 60 mol% PL-2L, and the MMB was adjusted so that the solid content concentration was 25 wt%. Was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 14 MMB was added to the polysiloxane solution B-2 so that the solid content concentration was 25% by weight. Further, SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 15 PL-2L (MMB substituted product) is blended with the polysiloxane solution A-2 so that the molar ratio of the monomer is 30 mol% of polysiloxane / 70 mol% of PL-2L, so that the solid content concentration is 25 wt%. MMB was added. Here, the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit. Further, 10-camphorsulfonic acid (CSA) was added so that the solid content was 0.2% by weight, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- CSA 10-camphorsulfonic acid
- Example 16 PL-2L (MMB substituted product) is blended with the polysiloxane solution A-2 so that the molar ratio of the monomer is 30 mol% of polysiloxane / 70 mol% of PL-2L, so that the solid content concentration is 25 wt%. MMB was added. Here, the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit. Furthermore, citric acid was added so that it might become 0.2 weight% with respect to solid content, and it mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 17 PL-2L (MMB-substituted product) was blended so that the solid content ratio was A-2 (99.5% by weight) / A-8 (0.5% by weight) and the molar ratio of polysiloxane was 30 mol%. / PL-2L was blended so as to have a blend ratio of 70 mol%, and MMB was added so that the solid content concentration was 25 wt%.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit. SI-200 was added and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 18 PL-2L (MMB-substituted product) is blended so that the solid content ratio is A-2 (95% by weight) / A-8 (5% by weight), and the molar ratio of polysiloxane is 30 mol% / PL-2L. Blending was performed so that the blend ratio was 70 mol%, and MMB was added so that the solid content concentration was 25 wt%.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit. SI-200 was added and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 19 PL-2L (MMB-substituted product) is blended with the polysiloxane solution D so that the molar ratio of the monomer is 30 mol% of polysiloxane / 70 mol% of PL-2L, and the solid content concentration is 25 wt%.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 20 To the polysiloxane solution E, PL-2L (MMB substituted product) was blended so that the molar ratio of the monomer was 30 mol% of polysiloxane / 70 mol% of PL-2L, and the solid content concentration was 25 wt%. Was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 21 To the polysiloxane solution F, PL-2L (MMB-substituted product) was blended so that the monomer molar ratio was 30 mol% polysiloxane / 70 mol% PL-2L, and the solid content concentration was 25 wt%. Was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 22 PL-2L (MMB substitution product) is blended with the polysiloxane solution G so that the molar ratio of the monomer is 30 mol% of polysiloxane / 70 mol% of PL-2L, and the solid content concentration is 25 wt%.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 23 The polysiloxane solution A-5 was blended with PL-7 (MMB-substituted product) so that the monomer molar ratio was 40 mol% polysiloxane / 60 mol% PL-7, and the solvent composition of the composition was MMB70 / EDM30 ( MMB and EDM were added so that the solid content concentration was 25% by weight.
- the monomer molar ratio of PL-7 was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 24 PL-2L (MMB-substituted product) was blended so that the solid content ratio was A-2 (99.6% by weight) / A-9 (0.4% by weight), and the molar ratio of the polysiloxane was 30 mol%. / PL-2L was blended so as to have a blend ratio of 70 mol%, and MMB was added so that the solid content concentration was 25 wt%.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit. SI-200 was added and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 25 PL-2L (MMB substituted product) is blended with the polysiloxane solution A-2 so that the molar ratio of the monomer is 30 mol% of polysiloxane / 70 mol% of PL-2L, so that the solid content concentration is 25 wt%. MMB was added. Furthermore, SI-200 (manufactured by Sanshin Chemical Industry Co., Ltd.) was added so that the solid content was 0.5% by weight, and aluminum acetate was added so that the aluminum content in the solution was 20 ppm, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 26 To the polysiloxane solution H, PL-2L (MMB-substituted product) is blended so that the molar ratio of the monomer is 30 mol% of polysiloxane / 70 mol% of PL-2L, and the solid content concentration is 25 wt%. Was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Example 27 PL-2L (GBL substituted product) is blended with the polysiloxane solution I so that the molar ratio of the monomer is 35 mol% of polysiloxane / 65 mol% of PL-2L, and the solid content concentration is 25 wt%.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- Comparative Example 1 PL-2L-PGME was blended with polysiloxane solution A-10 so that the monomer molar ratio was 30 mol% polysiloxane / 70 mol% PL-2L, and PGME was added so that the solid content concentration was 25 wt%. Added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3. Only a solvent having a boiling point of less than 130 ° C.
- Comparative Example 2 PL-2L (MMB substituted product) is blended with the polysiloxane solution A-11 so that the molar ratio of the monomer is 30 mol% of polysiloxane / 70 mol% of PL-2L, so that the solid content concentration is 25 wt%. MMB was added. Here, the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit. Further, SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3. The molecular weight of polysiloxane was low and the storage stability was poor. The crack film thickness was also small. In addition, the slit coatability was also blurred in the paste, and the line width unevenness became large.
- Comparative Example 3 Polysiloxane solution A-5 was blended with PL-20-PGME at a monomer molar ratio of polysiloxane 40 mol% / PL-20 60 mol%, and EDM was added so that the solid content concentration was 25 wt%. Added.
- the monomer molar ratio of PL-20 was calculated using SiO 2 as the monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3. Since the particle size of the silica particles was too large, the mask film thickness was large and the storage stability was poor.
- Comparative Example 4 PL-2L (MMB-substituted product) is blended so that the solid content ratio is A-2 (90% by weight) / A-8 (10% by weight), and the monomer molar ratio of polysiloxane 30 mol% / PL-2L Blending was performed so that the blend ratio was 70 mol%, and MMB was added so that the solid content concentration was 25 wt%.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit. SI-200 was added and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3. The mask film thickness increased due to the high phosphorus content.
- Comparative Example 5 PL-2L (MMB-substituted product) was blended so that the solid content ratio was A-2 (99.2% by weight) / A-9 (0.8% by weight), and 30% by mole of polysiloxane in the monomer molar ratio.
- / PL-2L was blended so as to have a blend ratio of 70 mol%, and MMB was added so that the solid content concentration was 25 wt%.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit. SI-200 was added and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3.
- the surface resistivity of the silicon wafer after peeling the mask layer was decreased compared to the blank before applying the mask paste. It seems that boron, which is an impurity in the paste, was doped into the silicon wafer and contaminated. The mask film thickness could not be calculated due to the influence of boron.
- Tetraethoxysilane (TEOS) and PL-2L-PGME were blended so that the monomer molar ratio was 30 mol% tetraethoxysilane / 70 mol% PL-2L, and the solid content concentration was 25 wt% and the solvent ratio was PGME70 wt%. / The solvent was added so that it might become 30 weight% of MMB.
- the monomer molar ratio of PL-2L was calculated using SiO2 as a monomer unit.
- SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition.
- Comparative Example 7 PL-2L (MMB substituted product) is blended with the polysiloxane solution A-2 so that the monomer molar ratio is 70 mol% polysiloxane / 30 mol% PL-2L, so that the solid content concentration is 25 wt%. MMB was added. Here, the monomer molar ratio of PL-2 was calculated using SiO 2 as a monomer unit. Further, SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3. Since the particle content is small, the crack film thickness is small and the mask film thickness is large.
- Comparative Example 8 PL-2L (MMB-substituted product) is blended with the polysiloxane solution A-2 so that the monomer molar ratio is 15 mol% polysiloxane / 85 mol% PL-2L, so that the solid content concentration is 25 wt%. MMB was added. Here, the monomer molar ratio of PL-2 was calculated using SiO 2 as a monomer unit. Further, SI-200 was added so as to be 0.5% by weight relative to the solid content, and mixed and dissolved. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition. The evaluation results are shown in Table 3. The mask film thickness was increased because the particle content was too high.
- Comparative Example 10 PL-2L (MMB substituted product) is blended with the polysiloxane solution A-2 so that the molar ratio of the monomer is 30 mol% of polysiloxane / 70 mol% of PL-2L, so that the solid content concentration is 25 wt%. MMB was added. Here, the monomer molar ratio of PL-2 was calculated using SiO 2 as a monomer unit. Further, SI-200 was added so that the solid content was 0.5% by weight, and aluminum acetate was added and mixed and dissolved so that the aluminum content in the solution was 40 ppm. Then, it filtered with the filter with the hole diameter of 0.45 micrometer, and obtained the mask paste composition. Each measurement and evaluation was performed about the obtained composition.
- Example 28 PL-2L (1,3BGDA substituted product) was blended with the polysiloxane solution A-3 so that the monomer molar ratio was 30 mol% polysiloxane / 70 mol% PL-2L, and 1,3BGDA was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- a thickening agent polymethyl methacrylate hereinafter, PMMA, weight average molecular weight 996,000
- PMMA weight average molecular weight 996,000
- Example 29 Dissolve polysiloxane solution B-3 in GBL, filter through a filter with a pore size of 0.45 ⁇ m, add PMMA (weight average molecular weight 99.60,000) to 5% by weight in the composition, dissolve by stirring, and mask paste A composition (solid content concentration of 30% by weight) was obtained. About the obtained composition, screen-printability confirmation, viscosity measurement, and each measurement and evaluation were performed. The evaluation results are shown in Table 5.
- Example 30 PL-2L (GBL-substituted product) was blended with the polysiloxane solution I so that the monomer molar ratio was 35 mol% polysiloxane / 65 mol% PL-2L, and GBL was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- a thickener PMMA weight average molecular weight: 996,000 was added to 8% by weight of the composition and dissolved by stirring to obtain a mask paste composition (solid content concentration: 33% by weight). %).
- a mask paste composition solid content concentration: 33% by weight.
- Example 31 PL-2L (GBL substituted product) was blended with the polysiloxane solution A-6 so that the monomer molar ratio was 30 mol% polysiloxane / 70 mol% PL-2L, and GBL was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- a thickening agent polyethylene oxide hereinafter referred to as PEO, weight average molecular weight 850,000
- PEO weight average molecular weight 850,000
- Example 32 PL-2L (GBL substituted product) was blended with the polysiloxane solution A-6 so that the monomer molar ratio was 30 mol% polysiloxane / 70 mol% PL-2L, and GBL was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- a thickening agent polyethylene oxide hereinafter referred to as PEO, weight average molecular weight 850,000
- PEO weight average molecular weight 850,000
- Example 33 PL-2L (GBL substituted product) was blended with the polysiloxane solution A-6 so that the monomer molar ratio was 30 mol% polysiloxane / 70 mol% PL-2L, and GBL was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- the thickener PEO weight average molecular weight 850,000
- PPO polypropylene oxide
- Example 34 Aerosil 300 (Nippon Aerosil Co., Ltd., powder silica particles, silica average particle diameter: 7 nm) was added to the polysiloxane solution A-6 so that the monomer molar ratio was 40 mol% polysiloxane / 60 mol% silica particles.
- the monomer molar ratio of Aerosil 300 was calculated using SiO 2 as the monomer unit.
- GBL and thickener PMMA weight average molecular weight 996,000 were added to the composition so as to be 5% by weight, and the mixture was stirred and dissolved to obtain a mask paste composition (solid content concentration 30% by weight). About the obtained composition, screen-printability confirmation, viscosity measurement, and each measurement and evaluation were performed. The evaluation results are shown in Table 5.
- Example 35 PL-2L (GBL substituted product) was blended with the polysiloxane solution A-6 so that the monomer molar ratio was 30 mol% polysiloxane / 70 mol% PL-2L, and GBL was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- a thickener polyvinyl pyrrolidone hereinafter PVP, weight average molecular weight 90,000
- PVP weight average molecular weight 90,000
- Example 36 PL-2L (1,3BGDA substituted product) was blended with the polysiloxane solution A-4 so that the monomer molar ratio was 30 mol% polysiloxane / 70 mol% PL-2L, and 1,3BGDA was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- a thickening agent ethyl cellulose ethyl cellulose 100 49% ethoxy manufactured by Wako Pure Chemical Industries, Ltd.
- was added to 3% by weight of the composition was dissolved by stirring to obtain a mask paste composition ( A solid concentration of 28% by weight was obtained.
- Example 37 PL-2L (GBL substituted product) was blended with the polysiloxane solution A-6 so that the monomer molar ratio was 30 mol% polysiloxane / 70 mol% PL-2L, and GBL was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- a thickening agent polyvinyl butyral hereinafter PVB, molecular weight 66,000
- a mask paste composition solid content concentration
- Example 38 PL-2L (GBL substituted product) was blended with the polysiloxane solution A-6 so that the monomer molar ratio was 30 mol% polysiloxane / 70 mol% PL-2L, and GBL was added.
- the monomer molar ratio of PL-2L was calculated using SiO 2 as the monomer unit.
- a thickening agent polyvinyl butyral hereinafter PVB, molecular weight 66,000
- Examples 39 to 44 (firing conditions) About the mask paste composition obtained in Example 28, after pre-baking, baking was performed to the baking conditions described in Table 6 (the oxygen concentration shown in Table 6 was increased from 20 ° C. to 10 ° C./min to the temperature shown in Table 6, 6 was maintained for 6 hours) and fired.
- Example 42 after baking at 300 ° C. for 60 minutes, the temperature was raised from 20 ° C. to 800 ° C. at 10 ° C./min in a nitrogen atmosphere (oxygen concentration 0%), and the additional baking was performed by holding for 60 minutes.
- the evaluation results are shown in Table 6.
- the results of Example 28 are also shown in Table 6.
- Tables 1 to 6 summarize the synthesis examples, examples, and comparative examples.
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Abstract
Description
(式中、R1は水素、炭素数1~10のアルキル基、炭素数2~10のアルケニル基、炭素数6~15のアリール基のいずれかを表し、複数のR1はそれぞれ同じでも異なっていてもよい。R2は水素、炭素数1~6のアルキル基、炭素数2~6のアシル基、炭素数6~15のアリール基のいずれかを表し、複数のR2はそれぞれ同じでも異なっていてもよい。nは0から3の整数を表す。)
式中、R1は水素、炭素数1~10のアルキル基、炭素数2~10のアルケニル基または炭素数6~15のアリール基のいずれかを表し、複数のR1はそれぞれ同じでも異なっていてもよい。R2は水素、炭素数1~6のアルキル基、炭素数2~6のアシル基、炭素数6~15のアリール基のいずれかを表し、複数のR2はそれぞれ同じでも異なっていてもよい。nは0から3の整数を表す。
本発明において、P、BおよびAlの含有量は以下の方法で測定した値であるものとする。Pについては公知である湿式分解法で試料の有機成分を分解後ICP質量分析法で測定した値、Bについては公知である酸素フラスコ燃焼法で試料の有機成分を分解後ICP発光分析法で測定した値、Alについては燃焼イオンクロマトグラフ法で測定した値である。
A-ST、メチルイソブチルケトンを分散媒とした粒子径12nmのMIBK-ST、イ
ソプロパノールを分散媒とした粒子径45nmのIPA-ST-L、粒子径85nmのIPA-ST-ZL、プロピレングリコールモノメチルエーテルを分散媒とした粒子径15nmのPGM-ST(以上商品名、日産化学工業(株)製)、γ-ブチロラクトンを分散媒とした粒子径12nmのオスカル101、分散溶液が水である粒子径5~80nmのカタロイド-S(以上商品名、触媒化成工業(株)製)、プロピレングリコールモノメチルエーテルを分散媒とした粒子径16nmのクォートロンPL-2L-PGME、γ-ブチロラクトンを分散媒とした粒子径17nmのクォートロンPL-2L-BL、ジアセトンアルコールを分散媒とした粒子径17nmのクォートロンPL-2L-DAA、分散溶液が水である粒子径18~20nmのクォートロンPL-2L、粒子径15nmのクォートロンPL-1、粒子径35nmのクォートロンPL-3、粒子径75nmのクォートロンPL-7、粒子径が18nmのGP-2L(以上商品名、扶桑化学工業(株)製)、粒子径が5~50nmであるレオロシール(商品名、(株)トクヤマ製)、粒子径が7~40nmであるアエロジル(商品名、(株)日本アエロジル製)などが挙げられる。また、これらのシリカ粒子は単独で使用しても、2種以上を組み合わせて使用してもよい。
設計変更などの変形を加えることも可能であり、そのような変形が加えられた実施形態も
本発明の範囲に含まれるものである。
IPA:イソプロピルアルコール(bp 82℃)
MMB:3-メトキシ-3-メチル-1-ブタノール(bp 174℃)
1,3BGDA:1,3-ブチレングリコールジアセテート(bp 232℃)
EDM:ジエチレングリコールメチルエチルエーテル(bp 176℃)
PGME:1-メトキシ-2-プロパノール(bp 118℃)
PGMEA:プロピレングリコールモノメチルエーテルアセテート(bp 145℃)
PTB:プロピレングリコール t-ブチルエーテル(bp 151℃)
PEO:ポリエチレンオキサイド
PMMA:ポリメチルメタクリレート
PPO:ポリプロピレンオキサイド
PVP:ポリビニルピロリドン。
アルミカップに測定したい溶液を1g秤取し、ホットプレートを用いて250℃で30分間加熱して液分を蒸発させた。加熱後のアルミカップに残った固形分を秤量して、溶液の固形分濃度を求めた。
ポリシロキサンの重量平均分子量はサンプルを孔径0.45μmメンブレンフィルターで濾過後、GPC(東ソー(株)製HLC-8220GPC)(展開溶剤:テトラヒドロフラン、展開速度:0.4ml/分)を用いてポリスチレン換算により求めた。
Pについては試料を硫酸、硝酸、フッ化水素酸および過塩素酸を用いて加水分解し、硫酸白煙が生じるまで濃縮したのち、ICP質量分析法(アジレント・テクノロジー(株)製Agilent4500)にて組成物中の含有量を測定した。
B型デジタル粘度計(英弘精機株式会社製DV-II+Pro)を用い、チャンバーを23℃に保温し、ローター回転開始5分後の値を読みとり、溶液粘度を算出した。
スリットノズルによりマスクペースト組成物をストライプ状にパターニングし、そのストライプ幅精度を確認した。
スクリーン印刷によりマスクペースト組成物をストライプ状にパターニングし、そのストライプ幅精度を確認した。
3cm×3cmにカットしたP型シリコンウェハー(E&Mマテリアルズ製、表面抵抗率0.291Ω/□、研磨済)を1%フッ酸水溶液に5分浸漬したあと水洗し、エアブロー後ホットプレートで100℃5分処理した。
クラック膜厚観察サンプルについてリン含有不純物拡散液(ポリテトラエトキシシラン5.9重量%、5酸化2リン5.0重量%)を、公知のスピンコート法でマスク上に塗布した。拡散剤の塗布後、各シリコンウェハーを140℃で5分間プリベークした。続いて、N2雰囲気下、1000℃で90分間加熱して不純物拡散成分を熱拡散させた。
熱拡散後の各シリコンウェハーを、10重量%のフッ酸水溶液に23℃で10分間浸浸させて、拡散剤およびマスクを剥離した。剥離後、シリコンウェハーを純水に浸漬させて洗浄し、表面の目視により残渣の有無を観察した。10分浸漬後目視で表面付着物が確認でき、ウエスでこすっても除去できないものをD(剥離残渣あり)、10分浸漬後目視で表面付着物が確認できるがウエスでこすることで除去できるものをC、5分を上回り10分以内で表面付着物が目視確認できなくなったものをB(剥離残渣なし)、5分以内で表面付着物が目視確認できなくなったものをA(剥離残渣なし)とした。
剥離後のシリコンウェハーに対して、表面抵抗を四探針式表面抵抗測定装置(RT-70V ナプソン(株)製)を用いて測定した。
上記剥離後のシリコンウェハー表面に対してP/N判定機を用いてP/N判定を実施した。
マスクペーストを密封容器に入れ、23℃で30日保管後の粘度変化率が10%未満のものを特に良好(A)、10%以上15%未満のものを良好(B)、それ以上のものを不良(C)とした。
500mLの三口フラスコにフェニルトリメトキシシランを198.29g(1.0mol)、MMBを239.63g仕込み、室温で攪拌しながら蟻酸3.80gをモノマーの加水分解に必要な水(54.00g)に溶解した蟻酸水溶液を30分かけて添加した。その後、フラスコを70℃のオイルバスに浸けて1時間攪拌した後、オイルバスを30分かけて150℃まで昇温した。昇温開始1時間後に溶液の内温が100℃に到達し、そこから30分間加熱攪拌した(内温は100~130℃)。反応中に副生成物であるメタノール、水、蟻酸が合計72.8g留出した。
内温100℃到達後の反応時間を3時間とした以外は合成例1-1同様にしてポリシロキサン溶液(A-2)を得た。得られたポリシロキサンの重量平均分子量(Mw)は4000であった。
溶媒をMMBの代わりに1,3BGDAとした以外は合成例1-1同様にしてポリシロキサン溶液(A-3)を得た。得られたポリシロキサンの重量平均分子量(Mw)は1500であった。
溶媒をMMBの代わりに1,3BGDAとし、内温100℃到達後の反応時間を3時間とした以外は合成例1-1同様にしてポリシロキサン溶液(A-4)を得た。得られたポリシロキサンの重量平均分子量(Mw)は4500であった。
溶媒をMMBの代わりにEDMとし、内温100℃到達後の反応時間を3時間とした以外は合成例1-1同様にしてポリシロキサン溶液(A-5)を得た。得られたポリシロキサンの重量平均分子量(Mw)は3500であった。
溶媒をMMBの代わりにGBLとし、内温100℃到達後の反応時間を3時間とした以外は合成例1-1同様にしてポリシロキサン溶液(A-6)を得た。得られたポリシロキサンの重量平均分子量(Mw)は3500であった。
溶媒をMMBの代わりにPGMEAとし、内温100℃到達後の反応時間を3時間とした以外は合成例1-1同様にしてポリシロキサン溶液(A-7)を得た。得られたポリシロキサンの重量平均分子量(Mw)は6000であった。
蟻酸の代わりにリン酸0.82gを使用し、内温100℃到達後の反応時間を3時間とした以外は合成例1-1同様に反応を行い、ポリシロキサン溶液(A-8)を得た。得られたポリシロキサンの重量平均分子量(Mw)は4500であった。
蟻酸の代わりにホウ酸16.00gを使用し、内温100℃到達後の反応時間を以外は合成例1-1同様にポリシロキサン溶液(A-9)を得た。得られたポリシロキサンの重量平均分子量(Mw)は3000であった。
溶媒をMMBの代わりにPGMEとし、内温100℃到達後の反応時間を3時間とした以外は合成例1-1同様にしてポリシロキサン溶液(A-10)を得た。得られたポリシロキサンの重量平均分子量(Mw)は4500であった。
蟻酸の添加量を0.5gとし、内温100℃到達後の反応時間を10分とした以外は合成例1-1同様にしてポリシロキサン溶液(A-11)を得た。得られたポリシロキサンの重量平均分子量(Mw)は500以下であった。
内温100℃到達後の反応時間を5時間とした以外は合成例1-1同様にしてポリシロキサン溶液(A-12)を得た。得られたポリシロキサンの重量平均分子量(Mw)は7500であった。
500mLの三口フラスコにフェニルトリメトキシシランを59.49g(0.30mol)、PL-2L-IPA (扶桑化学工業(株)製 コロイダルシリカ IPA分散液 シリカ平均粒子径17nm シリカ濃度25.4重量%) を165.57g(0.70mol SiO2換算)、MMBを133.07g仕込み、室温で攪拌しながら蟻酸3.04gをモノマーの加水分解に必要な水(16.20g)に溶解した蟻酸水溶液を30分かけて添加した。その後、フラスコを70℃のオイルバスに浸けて1時間攪拌した後、オイルバスを30分かけて150℃まで昇温した。昇温開始1時間後に溶液の内温が100℃に到達し、そこから3時間加熱攪拌した(内温は100~138℃)。反応中に副生成物であるメタノール、IPA、水、蟻酸が合計147.3g留出した。
モノマー、溶媒の仕込み量をフェニルトリメトキシシランを49.57g(0.25mol)、2-(3,4-エポキシシクロヘキシル)エチルトリメトキシシランを12.32g(0.05mol)、ジフェニルジメトキシシランを24.44g(0.10mol)、PL-2L-IPAを141.92g(0.60mol SiO2換算)、MMBを155.86gとした以外は合成例2-1と同様にポリシロキサン溶液(B-2)を得た。得られたポリシロキサンはシリカ粒子と結合した共重合体であり、共重合体としての重量平均分子量(Mw)は2300であった。
モノマー、溶媒の仕込み量をフェニルトリメトキシシランを109.06g(0.55mol)、PL-2L-IPAを106.44g(0.45mol SiO2換算)、GBLを168.87gとした以外は合成例2-1と同様にポリシロキサン溶液(B-3)を得た。得られたポリシロキサンはシリカ粒子と結合した共重合体であり、共重合体としての重量平均分子量(Mw)は2100であった。
モノマー、溶媒の仕込み量をフェニルトリメトキシシランを123.93g(0.625mol)、2-(3,4-エポキシシクロヘキシル)エチルトリメトキシシランを30.80g(0.125mol)、ジフェニルジメトキシシランを61.09g(0.25mol)、MMBを270.74gとし、内温100℃到達後の反応時間を3時間とした以外は合成例1と同様にポリシロキサン溶液Cを得た。得られたポリシロキサンの重量平均分子量(Mw)は5500であった。
モノマー、溶媒の仕込み量をp-スチリルトリメトキシシランを224.30g(1.0mol)、MMBを278.64gとした以外は合成例1と同様にポリシロキサン溶液Dを得た。得られたポリシロキサンの重量平均分子量(Mw)は4000であった。
モノマー、溶媒の仕込み量をp-トリルトリメトキシシランを212.30g(1.0mol)、MMBを254.32gとした以外は合成例1と同様にポリシロキサン溶液Eを得た。得られたポリシロキサンの重量平均分子量(Mw)は4000であった。
モノマー、溶媒の仕込み量を4-メトキシフェニルトリメトキシシランを228.32g(1.0mol)、MMBを284.68gとした以外は合成例1と同様にポリシロキサン溶液Fを得た。得られたポリシロキサンの重量平均分子量(Mw)は4000であった。
モノマー、溶媒の仕込み量を1-ナフチルトリメトキシシランを248.35g(1.0mol)、MMBを308.38gとした以外は合成例1と同様にポリシロキサン溶液Gを得た。得られたポリシロキサンの重量平均分子量(Mw)は4500であった。
モノマー、溶媒の仕込み量をメチルトリメトキシシランを90.80g(0.67mol)、フェニルトリメトキシシランを66.09g(0.33mol)、MMBを171.20gとした以外は合成例1と同様にポリシロキサン溶液Hを得た。得られたポリシロキサンの重量平均分子量(Mw)は4000であった。
モノマー、溶媒の仕込み量をプロピルトリメトキシシランを164.22g(1.0mol)、GBLを198.52gとした以外は合成例1と同様にポリシロキサン溶液Iを得た。得られたポリシロキサンの重量平均分子量(Mw)は4500であった。
減圧用ナスフラスコにPL-2L-IPA200g、MMB150gを添加し、40℃水浴下、エバポレーターで減圧しながらトラップに約150g留去物が得られたところで常圧にもどし、さらにMMB150gを添加した。もう一度バス中で減圧することによりPL-2L-IPAと固形分濃度が同じで溶媒がMMBに置換されたPL-2L(MMB置換品)を得た。
ポリシロキサン溶液A-1に、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25%となるようにMMBを添加した。ここでシリカ粒子のPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、スリット塗布性確認と、溶液中のP、BおよびAl含有量測定、剥離残渣評価、クラック膜厚測定、マスク膜厚測定、P/N判定および保存安定性の評価(以下、「各測定および評価」という)を行った。評価結果を表3に示す
実施例2
ポリシロキサン溶液A-2に、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-3に、PL-3(1,3BGDA置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるように1,3BGDAを添加した。ここでPL-3のモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液B-1に、固形分濃度が25重量%となるようにMMBを添加し、固形分対比0.5重量%となるようにサンエイドSI-200(三新化学工業製)を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-4に、PL-2L(1,3BGDA置換品)をモノマーモル比でポリシロキサン20mol%/PL-2L 80mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるように1,3BGDAを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-4に、PL-2L(1,3BGDA置換品)をモノマーモル比でポリシロキサン60mol%/PL-2L 40mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるように1,3BGDAを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-2に、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン40mol%/PL-2L 60mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに組成物全体に対して500ppmとなるようにメガファックF444(DIC(株)製パーフルオロアルキルエチレンオキシド付加物)を添加し混合溶解した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-5に、PL-2L-PGME(扶桑化学工業(株)製コロイダルシリカ PGME分散品、平均粒子径17nm)をモノマーモル比でポリシロキサン40mol%/PL-2L 60mol%のブレンド比となるようにブレンドし、組成物の溶剤組成がPGME70/EDM30(重量比)、固形分濃度が25重量%となるようにPGME,EDMを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-6に、PL-2L(GBL置換品)をモノマーモル比でポリシロキサン40mol%/PL-2L 60mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにGBLを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに組成物全体に対して500ppmとなるようにポリプロピレングリコールPPG4000(分子量4000,ジオール型)を添加し混合溶解した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-4に、PL-2L(1,3BGDA置換品)をモノマーモル比でポリシロキサン40mol%/PL-2L 60mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるように1,3BGDAを添加した。さらに組成物全体に対して500ppmとなるようにBYK333(ビックケミー(株)ポリエーテル変性ポリジメチルシロキサン)を添加し混合溶解した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-2に、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン40mol%/PL-2L 60mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに組成物全体に対して500ppmとなるようにBYK355(ビックケミー(株)製アクリル系レベリング剤)を添加し混合溶解した。さらに固形分対比0.1重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-7に、PL-2L(PTB置換品)をモノマーモル比でポリシロキサン40mol%/PL-2L 60mol%のブレンド比となるようにブレンドし、組成物の溶剤組成がPTB60/PGMEA40(重量比)、固形分濃度が25重量%となるようにPTB,PGMEAを添加した。 ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比1重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液Cに、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン40mol%/PL-2L 60mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液B-2に、固形分濃度が25重量%となるようにMMBを添加した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-2に、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.2重量%となるように10-カンファースルホン酸(CSA)を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-2に、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.2重量%となるようにクエン酸を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
固形分比率がA-2(99.5重量%)/A-8(0.5重量%)となるようにブレンドしたものに、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。SI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
固形分比率がA-2(95重量%)/A-8(5重量%)となるようにブレンドしたものに、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。SI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液Dに、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液Eに、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液Fに、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液Gに、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-5に、PL-7(MMB置換品)をモノマーモル比でポリシロキサン40mol%/PL-7 60mol%のブレンド比となるようにブレンドし、組成物の溶剤組成がMMB70/EDM30(重量比)、固形分濃度が25重量%となるようにMMB,EDMを添加した。ここでPL-7のモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
固形分比率がA-2(99.6重量%)/A-9(0.4重量%)となるようにブレンドしたものに、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。SI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
実施例25
ポリシロキサン溶液A-2に、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。さらに、固形分対比0.5重量%となるようにSI-200(三新化学工業製)を添加し、溶液中のアルミニウム含有量が20ppmとなるように酢酸アルミニウムを添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液Hに、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液Iに、PL-2L(GBL置換品)をモノマーモル比でポリシロキサン35mol%/PL-2L 65mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。
ポリシロキサン溶液A-10に、PL-2L-PGMEをモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにPGMEを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。重合に沸点130℃未満の溶媒のみを用い、昇温が不十分であったため蟻酸成分が留去せず残留しており、保存安定性が不良であった。また、組成物が沸点130℃未満の溶媒のみから構成されていたため、塗布回数を重ねるごとにスリットノズルのまわりにシロキサンの析出物が堆積した。
ポリシロキサン溶液A-11に、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。ポリシロキサンの分子量が低く、保存安定性が不良であった。またクラック膜厚も小さかった。また、スリット塗布性もペーストにじみが多く、線幅ムラが大きくなった。
ポリシロキサン溶液A-5に、PL-20-PGMEをモノマーモル比でポリシロキサン40mol%/PL-20 60mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにEDMを添加した。ここでPL-20のモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。シリカ粒子の粒径が大きすぎるため、マスク膜厚が大きく、保存安定性も不良であった。
固形分比率がA-2(90重量%)/A-8(10重量%)となるようにブレンドしたものに、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。SI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。リン含有量が多いためマスク膜厚が大きくなった。
固形分比率がA-2(99.2重量%)/A-9(0.8重量%)となるようにブレンドしたものに、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。SI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。マスク性評価において一部サンプルにおいてマスク層剥離後のシリコンウェハーの表面抵抗率がマスクペースト塗布前のブランクと比較し逆に低下していた。ペースト中の不純物であるボロンがシリコンウェハーにドープされ、汚染されたと思われる。ボロンの影響でマスク膜厚を算出できなかった。
テトラエトキシシラン(TEOS)、PL-2L-PGMEをモノマーモル比でテトラエトキシシラン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%、溶媒比PGME70重量%/MMB30重量%となるように溶媒を添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。シロキサンの重量平均分子量が300以下と低く、保存安定性が不良であった。またクラック膜厚も小さかった。また、スリット塗布性もペーストにじみが多く、線幅ムラが大きくなった。
ポリシロキサン溶液A-2に、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン70mol%/PL-2L 30mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2のモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。粒子含有量が少ないため、クラック膜厚が小さく、マスク膜厚が大きくなった。
ポリシロキサン溶液A-2に、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン15mol%/PL-2L 85mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2のモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200を添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。粒子含有量が多過ぎるため、マスク膜厚が大きくなった。
ポリシロキサン溶液A-12に、固形分濃度が25重量%となるようにMMBを添加し、混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。粒子を含有しないため、クラック膜厚が小さくマスク膜厚が大きくなった。また、スリット塗布性もペーストにじみが多く、線幅ムラが大きくなった。
ポリシロキサン溶液A-2に、PL-2L(MMB置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、固形分濃度が25重量%となるようにMMBを添加した。ここでPL-2のモノマーモル比はSiO2をモノマーユニットとして算出した。さらに固形分対比0.5重量%となるようにSI-200と、溶液中のアルミニウム含有量が40ppmとなるように酢酸アルミニウムを添加し混合溶解した。その後、孔径0.45μmのフィルターで濾過してマスクペースト組成物を得た。得られた組成物につき、各測定および評価を行った。評価結果を表3に示す。マスク性評価において一部サンプルにおいてマスク層剥離後のシリコンウェハーの表面抵抗率がマスクペースト塗布前のブランクと比較し逆に低下していた。ペースト中の不純物であるアルミニウムがシリコンウェハーにドープされ、汚染されたと思われる。アルミニウムの影響でマスク膜厚を算出できなかった。
ポリシロキサン溶液A-3に、PL-2L(1,3BGDA置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、1,3BGDAを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。孔径0.45μmのフィルターで濾過後、さらに増粘剤のポリメタクリル酸メチル(以下PMMA、重量平均分子量99.6万)を組成物中8重量%となるよう添加し攪拌溶解しマスクペースト組成物(固形分濃度33重量%)を得た。得られた組成物につき、スクリーン印刷性確認、粘度測定と各測定および評価を行った。評価結果を表5に示す。
ポリシロキサン溶液B-3をGBLに溶解し、孔径0.45μmのフィルターで濾過後、さらにPMMA(重量平均分子量99.6万)を組成物中5重量%となるよう添加し攪拌溶解しマスクペースト組成物(固形分濃度30重量%)を得た。得られた組成物につき、スクリーン印刷性確認、粘度測定と各測定および評価を行った。評価結果を表5に示す。
ポリシロキサン溶液Iに、PL-2L(GBL置換品)をモノマーモル比でポリシロキサン35mol%/PL-2L 65mol%のブレンド比となるようにブレンドし、GBLを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。孔径0.45μmのフィルターで濾過後、さらに増粘剤のPMMA(重量平均分子量99.6万)を組成物中8重量%となるよう添加し攪拌溶解しマスクペースト組成物(固形分濃度33重量%)を得た。得られた組成物につき、スクリーン印刷性確認、粘度測定と各測定および評価を行った。評価結果を表5に示す。
ポリシロキサン溶液A-6に、PL-2L(GBL置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、GBLを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。孔径0.45μmのフィルターで濾過後、さらに増粘剤のポリエチレンオキサイド(以下PEO、重量平均分子量85万)を組成物中7重量%となるよう添加し攪拌溶解しマスクペースト組成物(固形分濃度32重量%)を得た。得られた組成物につき、スクリーン印刷性確認、粘度測定と各測定および評価を行った。評価結果を表5に示す。
ポリシロキサン溶液A-6に、PL-2L(GBL置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、GBLを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。孔径0.45μmのフィルターで濾過後、さらに増粘剤のポリエチレンオキサイド(以下PEO、重量平均分子量85万)を組成物中4重量%となるよう添加し攪拌溶解しマスクペースト組成物(固形分濃度29重量%)を得た。得られた組成物につき、スクリーン印刷性確認、粘度測定と各測定および評価を行った。評価結果を表5に示す。
ポリシロキサン溶液A-6に、PL-2L(GBL置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、GBLを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。孔径0.45μmのフィルターで濾過後、さらに増粘剤のPEO(重量平均分子量85万)を組成物中2重量%、ポリプロピレンオキサイド(以下PPO、重量平均分子量22.8万)を組成物中0.5重量%となるよう添加し攪拌溶解しマスクペースト組成物(固形分濃度27.5重量%)を得た。得られた組成物につき、スクリーン印刷性確認、粘度測定と各測定および評価を行った。評価結果を表5に示す。
ポリシロキサン溶液A-6に、アエロジル300(日本アエロジル(株)製 粉体シリカ粒子 シリカ平均粒子径7nm)をモノマーモル比でポリシロキサン40mol%/シリカ粒子60mol%のブレンド比となるように添加した。ここでアエロジル300のモノマーモル比はSiO2をモノマーユニットとして算出した。さらにGBLと増粘剤のPMMA(重量平均分子量99.6万)を組成物中5重量%となるよう添加し、攪拌溶解しマスクペースト組成物(固形分濃度30重量%)を得た。得られた組成物につき、スクリーン印刷性確認、粘度測定と各測定および評価を行った。評価結果を表5に示す。
ポリシロキサン溶液A-6に、PL-2L(GBL置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、GBLを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。孔径0.45μmのフィルターで濾過後、さらに増粘剤のポリビニルピロリドン(以下PVP、重量平均分子量9万)を組成物中15重量%となるよう添加し攪拌溶解しマスクペースト組成物(固形分濃度40重量%)を得た。得られた組成物につき、スクリーン印刷性確認、粘度測定と各測定および評価を行った。評価結果を表5に示す。焼成後のフッ酸剥離時に増粘剤由来と思われる未溶解残渣があり、耐クラック性能、マスク性能ともに低かった。
ポリシロキサン溶液A-4に、PL-2L(1,3BGDA置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、1,3BGDAを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。孔径0.45μmのフィルターで濾過後、さらに増粘剤のエチルセルロース(和光純薬(株)製 エチルセルロース100 49%エトキシ)を組成物中3重量%となるよう添加し攪拌溶解しマスクペースト組成物(固形分濃度28重量%)を得た。得られた組成物につき、スクリーン印刷性確認、粘度測定と各測定および評価を行った。評価結果を表5に示す。焼成後のフッ酸剥離時に増粘剤由来と思われる未溶解残渣があり、耐クラック性能、マスク性能ともに低かった。
ポリシロキサン溶液A-6に、PL-2L(GBL置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、GBLを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。孔径0.45μmのフィルターで濾過後、さらに増粘剤のポリビニルブチラール(以下PVB、分子量6.6万)を組成物中10重量%となるよう添加し攪拌溶解しマスクペースト組成物(固形分濃度35重量%)を得た。得られた組成物につき、スクリーン印刷性確認、粘度測定と各測定および評価を行った。評価結果を表5に示す。焼成後のフッ酸剥離時に増粘剤由来と思われる未溶解残渣があり、耐クラック性能、マスク性能ともに低かった。また、粘度が低かったためスクリーン印刷時においてペーストにじみが多く、線幅ムラがσ=20μmとやや大きくなった。
ポリシロキサン溶液A-6に、PL-2L(GBL置換品)をモノマーモル比でポリシロキサン30mol%/PL-2L 70mol%のブレンド比となるようにブレンドし、GBLを添加した。ここでPL-2Lのモノマーモル比はSiO2をモノマーユニットとして算出した。孔径0.45μmのフィルターで濾過後、さらに増粘剤のポリビニルブチラール(以下PVB、分子量6.6万)を組成物中7重量%となるよう添加し攪拌溶解しマスクペースト組成物(固形分濃度32重量%)を得た。得られた組成物につき、スクリーン印刷性確認、粘度測定と各測定および評価を行った。評価結果を表5に示す。焼成後のフッ酸剥離時に増粘剤由来と思われる未溶解残渣があり、耐クラック性能、マスク性能ともに低かった。また、粘度が低かったためスクリーン印刷時においてペーストにじみが多く、線幅ムラがσ=35μmと大きくなった。
実施例28で得られたマスクペースト組成物について、プリベーク後に焼成を表6記載の焼成条件(表6記載の酸素濃度で20℃から10℃/分で表6記載の温度まで昇温し、表6記載の時間保持した。)に変更し焼成した。実施例42については300℃で60分間焼成の後、窒素雰囲気下(酸素濃度0%)で20℃から10℃/分で800℃まで昇温し、60分保持し追加焼成を行った。評価結果を表6に示す。実施例28の結果についても表6に再掲する。一定以上の酸素存在下で高温焼成するプロセスを経ることにより、剥離残渣がなく、耐クラック性能、マスク性能に優れたマスク層が得られた。
12 マスクパターン
14 P型ドーピングパターン
16 N型ドーピングパターン
18 パッシベーション膜
20 シリコン窒化膜
22 電極
24 P型不純物拡散層
26 N型不純物拡散層
30 ストライプ塗布装置
31 半導体基板
32 ステージ
33 リニア駆動装置(X方向)
34 リニア駆動装置(Y方向)
35 ブラケット
36 CCDカメラ
37 高さセンサー
38 ノズル
40 半導体基板
41 ノズル
42 吐出口
43 ペースト
44 ビード
45 マニホールド
46 加圧口
47 ペースト供給口
Claims (13)
- (a)一般式(1)で表されるオルガノシランの1種以上を反応させることによって合成されるポリシロキサン、(b)平均粒子径150nm以下のシリカ粒子、(c)沸点130℃以上の溶剤を含有してなり、(a)ポリシロキサンの重量平均分子量が1000以上であり、組成物固形分中のシリカ粒子が20重量%以上70重量%以下であり、全組成物中のP、BおよびAl濃度がそれぞれ20ppm以下であることを特徴とするマスクペースト組成物。
(R1)nSi(OR2)4-n (1)
(式中、R1は水素、炭素数1~10のアルキル基、炭素数2~10のアルケニル基または炭素数6~15のアリール基のいずれかを表し、複数のR1はそれぞれ同じでも異なっていてもよい。R2は水素、炭素数1~6のアルキル基、炭素数2~6のアシル基、炭素数6~15のアリール基のいずれかを表し、複数のR2はそれぞれ同じでも異なっていてもよい。nは0から3の整数を表す。) - 組成物固形分中の炭素数6~15のアリール基濃度が15重量%以上である請求項1記載のマスクペースト組成物。
- 粘度が3000mPa・s以上である請求項1または2記載のマスクペースト組成物。
- アクリル酸エステル系樹脂、ポリエチレンオキサイド、ポリプロピレンオキサイドから選ばれるいずれか1種以上を含有することを特徴とする請求項1~3のいずれかに記載のマスクペースト組成物。
- 組成物におけるアクリル酸エステル系樹脂、ポリエチレンオキサイド、ポリプロピレンオキサイドから選ばれるいずれか1種以上の含有量が1重量%以上10重量%以下である請求項4記載のマスクペースト組成物。
- スルホン酸もしくはその塩、またはカルボン酸もしくはその塩のいずれかを含有することを特徴とする請求項1~5のいずれかに記載のマスクペースト組成物。
- スルホン酸としてスルホン酸オニウム塩を含有することを特徴とする請求項1~6のいずれかに記載のマスクペースト組成物。
- 請求項1~7のいずれかに記載のマスクペースト組成物を硬化してなるマスク層。
- 請求項8に記載のマスク層が形成されてなる半導体素子。
- 請求項9に記載のマスク層をマスクとして不純物が拡散されてなる半導体素子。
- 前記半導体素子が光電変換素子である請求項9または10に記載の半導体素子。
- 半導体基板に、請求項1~7のいずれかに記載のマスクペースト組成物を用いてマスクパターンを形成する工程と、前記半導体基板に形成された前記マスクパターンをマスクとして、前記半導体基板に不純物を拡散させる工程と、を含むことを特徴とする半導体素子の製造方法。
- 前記マスクパターンを形成する工程が、半導体基板に、請求項1~7のいずれかに記載のマスクペースト組成物を用いてパターンを塗布する工程と、前記パターンを酸素濃度5%以上の雰囲気下、400℃以上900℃以下の温度範囲において5分以上加熱する工程と、を含む請求項12記載の半導体素子の製造方法。
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