WO2004110929A1 - シラン重合体およびシリコン膜の形成方法 - Google Patents
シラン重合体およびシリコン膜の形成方法 Download PDFInfo
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- WO2004110929A1 WO2004110929A1 PCT/JP2004/008547 JP2004008547W WO2004110929A1 WO 2004110929 A1 WO2004110929 A1 WO 2004110929A1 JP 2004008547 W JP2004008547 W JP 2004008547W WO 2004110929 A1 WO2004110929 A1 WO 2004110929A1
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- WIPO (PCT)
- Prior art keywords
- silicon film
- silane
- silane compound
- light
- film
- Prior art date
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- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 1
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000012719 thermal polymerization Methods 0.000 description 1
- 238000004809 thin layer chromatography Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 150000003613 toluenes Chemical class 0.000 description 1
- SZMYSIGYADXAEQ-UHFFFAOYSA-N trisilirane Chemical compound [SiH2]1[SiH2][SiH2]1 SZMYSIGYADXAEQ-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
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- 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
- C09D183/16—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 in which all the silicon atoms are connected by linkages other than oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/04—Hydrides of silicon
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/08—Compounds containing halogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/08—Compounds containing halogen
- C01B33/107—Halogenated silanes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
-
- 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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02367—Substrates
- H01L21/0237—Materials
- H01L21/02422—Non-crystalline insulating materials, e.g. glass, polymers
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02367—Substrates
- H01L21/0237—Materials
- H01L21/02425—Conductive materials, e.g. metallic silicides
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02524—Group 14 semiconducting materials
- H01L21/02532—Silicon, silicon germanium, germanium
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/0257—Doping during depositing
- H01L21/02573—Conductivity type
- H01L21/02576—N-type
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/0257—Doping during depositing
- H01L21/02573—Conductivity type
- H01L21/02579—P-type
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02612—Formation types
- H01L21/02617—Deposition types
- H01L21/02623—Liquid deposition
- H01L21/02628—Liquid deposition using solutions
Definitions
- the present invention relates to a silane polymer, a method for producing the silane polymer, and a method for forming a silicon film. More specifically, the present invention relates to a silane polymer applied to applications such as an integrated circuit, a thin film transistor, a photoelectric conversion device, and a photoconductor, a method for producing the silane polymer, and a method for easily forming a high-quality silicon film therefrom.
- the patterning of silicon thin films (amorphous silicon films, polysilicon films, etc.) applied to integrated circuits and thin film transistors is performed over the entire surface by a vacuum process such as the CVD (Chemi ca 1 Vapor Deposition) method. After the film is formed, the process is generally performed by removing unnecessary portions by photolithography.
- CVD Chemical ca 1 Vapor Deposition
- this method has problems such as the necessity of large-scale equipment, the inefficient use of raw materials, the difficulty of handling because the raw materials are gaseous, and the generation of a large amount of waste.
- Japanese Patent Application Laid-Open No. 1-26611 discloses a method of forming a silicon-based thin film by liquefying and adsorbing a gaseous raw material on a cooled substrate, and reacting it with chemically active atomic hydrogen.
- a problem that not only a complicated apparatus is required to continuously vaporize and cool the raw material hydride, but also it is difficult to control the film thickness.
- Japanese Patent Application Laid-Open Nos. 5-14741 and 7-26762.1 disclose a method in which liquid silicon hydride is applied to a substrate, and a silicon film is formed by heating or UV irradiation.
- these methods use low molecular weight materials, so the system is unstable and there are difficulties in handling.
- the solution used in these methods has poor wettability to the substrate, application to the substrate is difficult in the first place.
- it has a low boiling point due to its low molecular weight, and it evaporates faster than it forms a silicon film when heated, making it very difficult to obtain the desired film.
- how to use a high molecular weight (high wettability, high boiling point, and safe) high order silane as a material is an important point in film formation.
- Japanese Patent Application Laid-Open No. H10-321536 discloses that, as a treatment before coating, a mixture of a solution of a higher order silane and a catalyst is thermally decomposed or photo-decomposed to wet the solution. Attempts have been made to improve the performance, but this method requires mixing of a catalyst such as nickel into the solution, which significantly deteriorates the properties of the silicon film.
- Japanese Patent Application Laid-Open No. 2000-31066 discloses that a dopant source is mixed with a material liquid during the process of forming a silicon film composed of a higher silane solution described above. To form a doped silicon film.
- a dopant source is mixed with a material liquid during the process of forming a silicon film composed of a higher silane solution described above.
- the dopant source also evaporates accordingly. Therefore, it is difficult to effectively add the dopant.
- An object of the present invention is to provide a silane polymer having a specific large molecular weight, which is excellent from the viewpoints of wettability and boiling point when applied to a substrate, and which can easily form a high-quality silicon film. Is to provide.
- Another object of the present invention is to provide an industrially advantageous method for producing the silane polymer of the present invention.
- Another object of the present invention is to provide a composition for forming a silicon film containing the silane polymer of the present invention.
- Another object of the present invention is to provide a method for forming an excellent silicon film using the composition for forming a silicon film of the present invention.
- the above object and advantages of the present invention are: first, a silane characterized in that the weight average molecular weight in terms of polystyrene measured by gel permeation chromatography is 800 to 50,000. Achieved by polymers.
- the above-mentioned object and advantages of the present invention are, secondly, characterized in that a silane compound having photopolymerizability is irradiated with a light beam of a specific wavelength region to produce a silane polymer of the present invention. Is achieved by the method for producing a silane polymer described above. According to the present invention, thirdly, the above objects and advantages of the present invention are achieved by a composition for forming a silicon film, comprising the silane polymer and the organic solvent of the present invention.
- the above object and advantages of the present invention are: Fourth, the composition for forming a silicon film of the present invention is applied on a substrate, and at least one of heat treatment and light treatment is performed. This is achieved by a method of forming a silicon film.
- Figure 1 shows the spectrum data of all wavelength irradiation.
- Figure 2 shows the spectrum data of 365 nm irradiation.
- Figure 3 shows the spectrum data of the 405 nm irradiation.
- Fig. 4 shows the spectrum data of the irradiation at 436 nm.
- FIG. 6 is a GC spectrum diagram of sample No. 3 obtained in Example 1.
- FIG. 7 is a GC spectrum diagram of Sample No. 4 obtained in Example 1.
- FIG. 8 is a GC spectrum diagram of Sample No. 5 obtained in Example 1.
- FIG. 9 is a GC spectrum diagram of sample No. 6 obtained in Example 1.
- FIG. 10 is a GC spectrum of the sample No. 9 obtained in Example 1.
- FIG. 11 is an MS spectrum diagram of Sample No. 3 obtained in Example 1.
- FIG. 12 is a GPC chart of the silane polymer obtained in Example 9.
- the silane polymer of the present invention has a polystyrene-equivalent weight average molecular weight (Mw) of 800 to 5,000, preferably 1,000 to 5,000, more preferably 1,200 to 5,000 as measured by gel permeation chromatography. In range. When Mw is smaller than the lower limit, the film-forming property is not sufficient, and when Mw is larger than the upper limit, the solubility in a solvent tends to be insufficient. Further, the number average molecular weight (Mn) of the silane polymer is preferably from 600 to 2,000.
- the GPC device does not need to be a special device, and a commercially available GPC device can be used.
- the oxygen concentration in the measurement atmosphere when measuring with a GPC device is preferably 100 ppm or less, more preferably 1 ppm or less.
- Such a measurement atmosphere can be easily prepared, for example, by placing the entire GPC apparatus in a closed environment such as a glove box.
- the column filler used for the measurement may be, for example, a polystyrene-based filler such as a styrene-divinylbenzene copolymer-based filler, a polymethacrylate-based polymer filler, a silica gel-based filler, a dextran-based filler, and a porous glass-based filler.
- a polystyrene-based filler such as a styrene-divinylbenzene copolymer-based filler, a polymethacrylate-based polymer filler, a silica gel-based filler, a dextran-based filler, and a porous glass-based filler.
- polystyrene-based fillers are preferred, and styrene-divinylbenzene copolymer-based fillers are particularly preferred.
- Examples of the solvent used include toluene, o-xylene, m-xylene, p-xylene, cisdecalin, transdecalin, benzene, cyclopentane, cyclohexane, n-pentane, n-hexane, n-heptane, n — Octane, tetrahydrofuran, getyl ether, methylene chloride and the like. Of these, toluene is particularly preferred.
- Such a solvent is preferably degassed at the time of use to reduce the dissolved oxygen content to 10 ppm or less, preferably 0.5 ppm or less. More preferably, It is also recommended to dry and have a water content of preferably not more than 300 PPm, more preferably not more than 3 Oppm.
- the concentration of the sample at the time of measurement is preferably 0.01 to 10% by volume, more preferably 0.1 to 5% by volume.
- any of a refractive index detector, a light scattering detector and a viscosity detector can be used.
- a refractive index detector is desirable.
- the silane polymer in the waste liquid from the GPC device can be inactivated by, for example, the method described in JP-A-2002-66866.
- the silane polymer of the present invention can be obtained by irradiating a photopolymerizable silane compound with light having a specific wavelength range. As described above, the silane polymer of the present invention is formed by irradiating a photopolymerizable silane compound with light in a specific wavelength region and photopolymerizing the silane compound.
- the silane polymer of the present invention irradiates a light of a specific wavelength region to a solution of the photopolymerizable silane compound, or irradiates a light of a specific wavelength region to itself when the silane compound is in a liquid state.
- it may be produced by photopolymerization.
- the wavelength of the light in the specific wavelength region irradiated on the silane compound is preferably
- a method may be used in which a silane compound is irradiated with a light beam having a wavelength of 42 Onm or less, and then filtered to remove a solvent-insoluble component which may be formed by filtration.
- a light beam having a wavelength of less than 30 Onm outside the specific wavelength region can be used for irradiation, but in that case, irradiation is preferably carried out in the absence of a solvent. The presence of the solvent makes it easier for impurities to enter the silicon polymer.
- a solvent can be used. Filtration after irradiation, for example, with a pore size of 0.1 to 3.
- the irradiation time is not limited by the illuminance and irradiation conditions, but is preferably from 0.1 second to 600 minutes, particularly preferably from 1 to 120 minutes, in order to obtain a desired silane polymer. is there.
- the irradiation method not only a method of continuously or intermittently irradiating a light beam, but also an intermittent irradiation or irradiation while changing illuminance may be used.
- the silane compound or the solution thereof in order to obtain a desired silane polymer, it is preferable to uniformly irradiate the silane compound or the solution thereof with light while stirring the silane compound or the solution thereof.
- silane compound used for producing the silane polymer of the present invention examples include, for example,
- Such silane compounds having one cyclic structure include, for example, cyclotrisilane, cyclotetrasilane, cyclopentasilane, cyclohexasilane, cycloheptanesilane and the like.
- silane compounds in which hydrogen atoms of these skeletons are partially substituted with SiH 3 groups or halogen atoms such as a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, and the like can be given. These may be used in combination of two or more.
- silane compounds having at least one cyclic structure in the molecule are preferably used because they have extremely high reactivity to light and can efficiently perform photopolymerization.
- cyclotetrasilane having one cyclic structure in the molecule Shikuropen evening silane, Kisashiran cyclohexane, in S i n X 2n (wherein such flops evening silane cyclohexane, definitions of n and X in the above formula
- silane compound represented by the formula (1) in addition to the above-mentioned reasons, and is particularly preferable because of easy synthesis and purification. .
- silane compound a silane compound having the above-described cyclic structure is preferable, but as long as the photopolymerization process by light irradiation is not impaired in the present invention, the silane compound is modified with a boron atom and / or a phosphorus atom.
- a modified silane compound or the like can be used in combination.
- the solvent for adjusting the pressure is not particularly limited as long as it dissolves the silane compound and does not react with the compound, but preferably has a vapor pressure at room temperature of 0.001 to 20 OmmHg. Things are used.
- the vapor pressure is higher than 20 OmmHg, the solvent evaporates first when forming a coating film by coating, and it is difficult to form a good coating film.
- the vapor pressure is lower than 0.001 mmHg, when the coating film is similarly formed, the drying becomes slow and the solvent easily remains in the coating film of the silane compound. It is difficult to obtain a good quality silicon film even after heat and heat or light treatment.
- a solvent having a boiling point at room temperature or higher at a normal pressure and lower than 250 ° C. to 300 ° C. which is the decomposition point of the silane polymer.
- the solvent used for the solution of the silane compound include n-hexane, n-heptane, n-octane, n-decane, dicyclopentane, benzene, toluene, xylene, durene, indene, tetrahydronaphthalene, and deca.
- Hydrocarbon solvents such as hydronaphthalene and squalane; dipropyl ether, ethylene glycol dimethyl ether, ethylene glycol dimethyl ether, ethylene glycol methyl ethyl ether, diethylene glycol dimethyl ether, diethylene glycol dimethyl ether, diethylene glycol methyl Ether solvents such as ethyl ether, tetrahydrofuran, tetrahydropyran, 1,2-dimethoxyethane, bis (2-methoxyethyl) ether and p-dioxane; Examples include polar solvents such as carbonate, acetylolactone, N-methyl-2-pyrrolidone, dimethylformamide, acetonitrile, and dimethylsulfoxide.
- polar solvents such as carbonate, acetylolactone, N-methyl-2-pyrrolidone, dimethylformamide, acetonitrile, and dimethylsulfoxide.
- hydrocarbon solvents and ether solvents are preferable, and hydrocarbon solvents are particularly preferable, in view of solubility of the silane compound and stability of the solution.
- These solvents can be used alone or as a mixture of two or more.
- the silane polymer of the present invention the above effects make it easier than the conventional method.
- a high-quality silicon film can be formed.
- the amorphous silicon film thus formed can be further crystallized by a method such as heat treatment or excimer laser annealing to further improve the performance.
- the silane polymer used in the method of the present invention can be obtained by irradiating a photopolymerizable silane compound with light to perform photopolymerization. It is also possible to carry out photopolymerization in the presence of a substance containing a Group 3B element or a substance containing a Group 5B element (dopant source).
- a substance containing a Group 3B element or a substance containing a Group 5B element dopant source.
- light irradiation can cause a bond between a dopant and a silane polymer at a molecular level, and the solution is applied to a substrate, and n-type and p-type having better performance by heat treatment and / or light treatment.
- a doped silicon film can be formed. Further, the characteristics of the doped silicon film formed by such a process can be further improved by steps such as heating. In particular, after applying a silane polymer formed from a solution of a silane compound containing this substance to a substrate, such a substance (dopant) can be activated by a heat treatment and a Z or light treatment described later.
- the concentration of the dopant source to be added may be determined according to the final dopant concentration in the silicon film.After irradiating with light, the concentration is adjusted by diluting with a solvent, or adding the dopant source. Alternatively, it may be mixed with the silane polymer irradiated with light.
- a substance containing an element such as phosphorus, boron, arsenic is preferable. Substances such as those described in JP-A-2001-31066 can be exemplified.
- the composition for forming a silicon film of the present invention contains the above silane polymer and an organic solvent.
- the concentration of the silane polymer in the composition for forming a silicon film of the present invention prevents uneven deposition of the silane polymer when applied to a substrate when a silicon film is formed, and a uniform coating film is obtained.
- the content is preferably about 1 to 80% by weight, and can be appropriately adjusted according to a desired silicon film thickness.
- the lower limit is more preferably double %, More preferably 5% by weight, particularly preferably 10% by weight.
- Examples of the organic solvent that can be contained in the composition for forming a silicon film of the present invention include the above-mentioned organic solvents that can be used when the photopolymerization of the silane compound is performed in a solution.
- composition for forming a silicon film of the present invention may further contain other additives as necessary.
- the composition for forming a silicon film of the present invention may further contain a substance containing a Group 3B element or a substance containing a Group 5B element of the periodic table as a dopant source.
- a dopant source By appropriately selecting and adding such a substance, a desired n-type or p-type silicon film into which a dopant has been introduced can be formed.
- the silane polymer In the process of forming a silicon film using a composition to which such a substance is added, the silane polymer has a high boiling point, so that it is difficult to evaporate, and as a result, the evaporation of the dopant source can be suppressed.
- the dopant can be more efficiently introduced into the film than the above method.
- the substance related to the solution of the silane polymer is added at the time of photopolymerization to form a silane polymer, it is not necessary to add the substance at this stage (after completion of the photopolymerization).
- the substance containing a Group 3B element and the substance containing a Group 5B element of the periodic table are the same as those exemplified as the substances added to the silane compound before the aforementioned UV irradiation. .
- such a material (dopant) can be activated by heat treatment and / or light treatment described later.
- composition for forming a silicon film of the present invention may contain a trace amount of a surface tension regulator such as a fluorine-based, silicone-based, or nonionic-based material, if necessary, as long as the intended function is not impaired. it can.
- a surface tension regulator such as a fluorine-based, silicone-based, or nonionic-based material, if necessary, as long as the intended function is not impaired. it can.
- the silane polymer of the present invention is particularly useful for forming a silicon film applied to applications such as integrated circuits, thin film transistors, photoelectric conversion devices, and photoconductors.
- the method of forming a silicon film according to the present invention is characterized in that the above-described composition for forming a silicon film is applied to a substrate or a substrate, and heat treatment and / or light treatment is performed. Otherwise, a method similar to the method of forming a silicon film using a normal solution can be applied.
- the method may include a step of selectively removing only the solvent before applying the heat treatment and / or the light treatment after applying the composition to a substrate using the composition containing a solvent as the composition. .
- the method of forming a silicon film according to the present invention does not supply a gas as in a general CVD method, but applies the above-described composition to a substrate, and then, if necessary, dries a solvent to form a silane polymer film. Is formed, and this film is converted into a silicon film by thermal decomposition and / or photolysis, and if necessary, further converted into a polycrystalline silicon film by laser treatment. Furthermore, a p-type or n-type silicon film can be formed without implanting a silicon film modified with boron atoms or phosphorus atoms in a vacuum system.
- a method for applying the composition for example, a method such as a spin coating method, a roll coating method, a curtain coating method, a dip coating method, a spraying method, and a droplet discharging method can be used.
- the application is generally performed at a temperature above room temperature. When the temperature is lower than room temperature, the solubility of the silane polymer is reduced, and the silane polymer may be partially deposited. Since the silane compound, the silane polymer, and the composition for forming a silicon film in the present invention easily react with water and oxygen to be denatured, it is preferable that the series of steps be in a state without water or oxygen.
- the atmosphere in the series of steps is preferably made of an inert gas such as nitrogen, helium, or argon. Further, an atmosphere containing a reducing gas such as hydrogen as necessary is preferable. It is also desirable to use a solvent or additive from which water or oxygen has been removed.
- the droplet discharging method is a method for forming a desired pattern of an object to be discharged by discharging droplets to a desired region, and is sometimes called an ink jet method.
- the droplet to be ejected is not a so-called ink used for printed matter, but a liquid material containing a material constituting the device, and this material, for example, constitutes the device.
- the term “droplet ejection” is not limited to spraying at the time of ejection, but also includes the case where droplets of a liquid material are ejected continuously.
- the rotation speed of the spinner when using the spin coating method is determined by the thickness of the thin film to be formed and the composition of the coating solution, but is preferably 100 to 5, OOO rpm, and more preferably 300 to 3, , OOO r pm.
- a heat treatment may be performed to remove low-boiling components such as a solvent.
- the heating temperature varies depending on the type of solvent used and the boiling point (vapor pressure), but is, for example, 100 ° C to 200 ° C.
- the atmosphere is preferably performed in the same inert gas such as nitrogen, helium, or argon as in the above coating step. At this time, by reducing the pressure of the entire system, the solvent can be removed at a lower temperature. Thus, deterioration of the substrate due to heat can be reduced.
- the method of forming a silicon film of the present invention converts a silane polymer on a substrate from which a solvent has been removed into a silicon film by heat treatment and / or light treatment.
- the film is amorphous or polycrystalline.
- heat treatment an amorphous silicon film is generally obtained at a temperature lower than about 550 ° C, and a polycrystalline silicon film is obtained at a temperature higher than about 550 ° C.
- the temperature is preferably from 300 ° C. to 550 ° C., and more preferably from 350 ° C. to 500 ° C. If the temperature is lower than 300 ° C., a silicon film having a sufficient thickness may not be formed.
- the atmosphere in which the heat treatment is performed is preferably an atmosphere containing an inert gas such as nitrogen, helium, or argon, or a reducing gas such as hydrogen.
- an inert gas such as nitrogen, helium, or argon
- a reducing gas such as hydrogen.
- the amorphous silicon film obtained above can be converted to a polycrystalline silicon film by irradiating a laser.
- light sources used for light processing include low-pressure or high-pressure mercury lamps, deuterium lamps, or discharge light of rare gases such as argon, krypton, and xenon, as well as YAG lasers, argon lasers, and carbon dioxide.
- Gas laser, e F, Excimer lasers such as XeCl, XeBr, KrF, KrCArF, and ArC1 are exemplified.
- these light sources those having an output of 10 to 5,000 W are preferably used, but 100 to 1,000 W is usually sufficient.
- the wavelength of these light sources is not particularly limited as long as the light is absorbed by the silane polymer. Preferably it is 170 nm to 60 Onm. From the viewpoint of conversion efficiency to a polycrystalline silicon film, the use of laser light is particularly preferable.
- the temperature during the light treatment is preferably from room temperature to 1,500 ° C, and can be appropriately selected according to the semiconductor characteristics of the obtained silicon film.
- the substrate used in the method for forming a silicon film of the present invention is not particularly limited, but is not limited to ordinary quartz, borosilicate glass, soda glass, a transparent electrode such as ITO, gold, silver, copper, nickel, A metal substrate such as titanium, aluminum, or tungsten, and a glass or plastic substrate having these metals or an oxide of these metals on the surface can be used.
- the silicon film obtained by the method for forming a silicon film of the present invention can be applied to applications such as integrated circuits, thin film transistors, photoelectric conversion devices, and photoconductors.
- applications such as integrated circuits, thin film transistors, photoelectric conversion devices, and photoconductors.
- the bandpass filters used in the examples are as follows.
- the device that measured the illuminance in the examples is a spectral irradiance meter “Spectrora Diome Ichiya USR-40D” (manufactured by Shio Electric Co., Ltd.). .
- the illuminance at each wavelength of the light beam used this time is as shown in Table 1 below.
- the illuminance was “Spectroradiome-Ichiichi USR-40D” at a distance of 1 cm from the fiber from which the light was emitted. This is a value converted from a spectrum chart measured using Illuminance W / cm 2 'nm) (wavelength) Spectrum data
- the silicon polymer was obtained by changing the irradiation time for Sankare using each of the above wavelengths, and 9 mL of toluene was added to prepare a 10% (VZV) solution.
- Table 2 shows the characteristics of the 10% solution and the results of film appearance observation after spin-coating the solution on a quartz substrate at 1,500 rpm and heating at 400 ° C for 30 minutes.
- ESC A analysis of the heat-treated film ( Figure 8) formed from the sample (No. 5) showed that the silicon-based chemical shift was observed at 99.0 eV. It turned out to be.
- GPCMAX and TDA-302 (manufactured by VI SCOTEK, Inc.) as a gel permeation chromatographic analyzer were carried into a glove box, and were carried out in a nitrogen stream at an oxygen concentration of 1 Oppm or less.
- Gel permeation chromatographic column is manufactured by Tosoh Corporation, TS K-GELG3000HHR, TSK-GELG 2000 HHR, TSK-GE LG 100 OHHR (all three columns contain a styrene-divinylbenzene copolymer, particle size 5 m), which are arranged in series.
- the detector used was TDA-302, the detector used was a cell capacity: 12 L, and the light source used was a refractive index detector having a 660 nm light emitting diode.
- a silane polymer as a sample was used as a 20% by volume toluene solution. 1 OOL of this solution was collected, and 1,900 L of toluene was added to adjust the silane polymer concentration to 1% by volume. Next, the sample was filtered through a 0.45 m polytetrafluoroethylene membrane filter to prepare a GPC measurement sample.
- the sample was measured under the conditions of an injection volume of 100 L, a column temperature of 30 ° C, and a toluene flow rate of 0.8 mLZ.
- the GPC waste liquid containing the silane polymer was placed in a glove box with an oxygen concentration of 10 ppm or less.
- 2-methyl-12-pentyl dimethyl dodecylamine / propylene dalicol monomethyl ether One part of a mixed solution (50Z50 in a volume ratio) was added, and the mixture was stirred for 2 weeks to be inactivated, and then incinerated for treatment.
- GC (—MS) analysis was performed on the components dissolved in toluene using GC for the sample Nos. 3, 4, 5, 6, and 9 prepared above.
- the middle part of the charts in Figs. 6 to 10 are 5 times enlarged photographs of each peak.
- FIG. 6 shows that the sample solution illuminated at 365 nm for 10 minutes has complex components. From Fig. 10, it can be seen that in the Sankare solution irradiated at 436 nm wavelength for 20 minutes, only a very small amount of components other than the raw materials cyclopentene silane (Sio) and toluene are produced. On the other hand, in Figs. 7, 8 and 9, the sample irradiated with 405 nm for 10 to 20 minutes showed several components (three components) other than silane and toluene, which were used for the sample. component of the c an, was identified as the component of S i 1 () H 22. The structure of the other two components by GC-MS is unknown, but is considered to be a component effective as a component exhibiting performance in the present invention.
- FIG. 11 shows the MS spectrum of the 702 Scan component of Sample No. 5. Note that in FIG.
- the 301 peak is estimated to be S i 10 H 21 +1 .
- the sheet resistance of this sample which was further heat-treated at 800 ° C. for 5 minutes, was measured and found to be 50 kQ / cm 2 . Further, the sheet resistance value of the heat-treated sample at 400 ° C, which was heat-treated at 900 ° C for 5 minutes, was 1 OkQ / cm 2 .
- GC-14B manufactured by Shimadzu Corporation as a gas chromatograph analyzer, TCD (Therma 1 Conductivity Detector) as a detector, and S.OV-17 10% CV as an analytical column 60 -80 AW—DMCS was used, and helium was used as the carrier gas.
- Analytical conditions Injection temperature 150 ° C, detector temperature 200 ° C, column temperature: After holding at 70 ° C for 5 minutes, heat up to 100 ° C at a rate of 10 ° C / min, 100 ° C The temperature was raised to 200 ° C at a heating rate of 10 ° CZ for 15 minutes, and the temperature was held at 200 ° C for 10 minutes.
- Toluene is added to the silane compound containing the silane polymer after the light irradiation to form a 20 wt% solution, and the mixture is filtered through a polytetrafluoroethylene membrane filter having a pore size of 0.45, and then 2,000 rpm on a quartz substrate. As a result of spin coating, the film formability was good. .
- Toluene was added to the filtered silane compound to form a 20 wt% solution, and the mixture was filtered through a 0.45 m polytetrafluoroethylene membrane filter, and then spun at 2,000 rpm on a quartz substrate. After coating, the film formability was good.
- the filtered silane compound was filtered through a membrane filter made of polytetrafluoroethylene having a pore size of 0, and then spin-coated at 2,000 rpm on a quartz substrate. As a result, the film formation was good.
- the silane compound was irradiated with light in the same manner as in Example 6, except that a bandpass filter for 405 nm was used and the light irradiation time was 10 minutes.
- the light irradiated here is light having a spectrum distribution corresponding to the spectrum data C.
- FIG. 12 shows the gel permeation chromatogram. The amount of the remaining cyclopentene silane was measured by gas chromatography, and it was found that 29.9% by weight of the cyclopentene silane remained without polymerization. .
- Toluene is added to the silane compound containing the silane polymer after the light irradiation to form a 2% by weight solution, and the solution is filtered through a 0.45 m polytetrafluoroethylene membrane filter. When spin-coated at rpm, the film formability was good.
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- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
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- Wood Science & Technology (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Silicon Compounds (AREA)
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Abstract
Description
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KR1020047017547A KR101100562B1 (ko) | 2003-06-13 | 2004-06-11 | 실란 중합체 및 실리콘막의 형성 방법 |
US10/560,527 US20060159859A1 (en) | 2003-06-13 | 2004-06-11 | Silane polymer and method for forming silicon film |
EP04746061A EP1640342A4 (en) | 2003-06-13 | 2004-06-11 | SILANEPOLYMER AND METHOD FOR FORMING SILICON FILM |
US12/398,451 US20090215920A1 (en) | 2003-06-13 | 2009-03-05 | Silane polymer and method for forming silicon film |
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EP (1) | EP1640342A4 (ja) |
JP (2) | JP4258646B2 (ja) |
KR (1) | KR101100562B1 (ja) |
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Cited By (12)
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US7485691B1 (en) | 2004-10-08 | 2009-02-03 | Kovio, Inc | Polysilane compositions, methods for their synthesis and films formed therefrom |
US7491782B1 (en) | 2004-10-08 | 2009-02-17 | Kovio, Inc. | Polysilane compositions, methods for their synthesis and films formed therefrom |
US7723457B1 (en) | 2004-10-08 | 2010-05-25 | Kovio, Inc. | Polysilane compositions, methods for their synthesis and films formed therefrom |
US7951892B1 (en) | 2004-10-08 | 2011-05-31 | Kovio, Inc. | Doped polysilanes, compositions containing the same, methods for making the same, and films formed therefrom |
US8057865B1 (en) | 2004-10-08 | 2011-11-15 | Kovio, Inc. | Polysilane compositions, methods for their synthesis and films formed therefrom |
US8236916B1 (en) | 2004-10-08 | 2012-08-07 | Kovio, Inc. | Polysilane compositions, methods for their synthesis and films formed therefrom |
US8242227B2 (en) | 2004-10-08 | 2012-08-14 | Kovio, Inc. | Doped polysilanes, compositions containing the same, methods for making the same, and films formed therefrom |
US8455604B1 (en) | 2004-10-08 | 2013-06-04 | Kovio, Inc. | Polysilane compositions, methods for their synthesis and films formed therefrom |
US8378050B2 (en) | 2005-10-05 | 2013-02-19 | Kovio, Inc. | Linear and cross-linked high molecular weight polysilanes, polygermanes, and copolymers thereof, compositions containing the same, and methods of making and using such compounds and compositions |
US8092867B2 (en) | 2006-10-06 | 2012-01-10 | Kovio, Inc. | Silicon polymers, methods of polymerizing silicon compounds, and methods of forming thin films from such silicon polymers |
US8461284B2 (en) | 2006-10-06 | 2013-06-11 | Kovio, Inc. | Silicon polymers, methods of polymerizing silicon compounds, and methods of forming thin films from such silicon polymers |
US8846507B2 (en) | 2006-10-06 | 2014-09-30 | Thin Film Electronics Asa | Silicon polymers, methods of polymerizing silicon compounds, and methods of forming thin films from such silicon polymers |
Also Published As
Publication number | Publication date |
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JP2009102224A (ja) | 2009-05-14 |
JP5013128B2 (ja) | 2012-08-29 |
US20090215920A1 (en) | 2009-08-27 |
KR20060027296A (ko) | 2006-03-27 |
JP2005022964A (ja) | 2005-01-27 |
TW200512158A (en) | 2005-04-01 |
JP4258646B2 (ja) | 2009-04-30 |
KR101100562B1 (ko) | 2011-12-29 |
TWI313252B (ja) | 2009-08-11 |
US20060159859A1 (en) | 2006-07-20 |
EP1640342A4 (en) | 2006-11-22 |
EP1640342A1 (en) | 2006-03-29 |
CN100355653C (zh) | 2007-12-19 |
CN1697781A (zh) | 2005-11-16 |
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