WO2004026765A1 - 多孔質フィルムの改質方法及び改質された多孔質フィルム並びにその用途 - Google Patents
多孔質フィルムの改質方法及び改質された多孔質フィルム並びにその用途 Download PDFInfo
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- WO2004026765A1 WO2004026765A1 PCT/JP2003/011445 JP0311445W WO2004026765A1 WO 2004026765 A1 WO2004026765 A1 WO 2004026765A1 JP 0311445 W JP0311445 W JP 0311445W WO 2004026765 A1 WO2004026765 A1 WO 2004026765A1
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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
- C09D183/04—Polysiloxanes
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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
- C09D183/14—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 at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
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- 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
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02126—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC
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- 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
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02203—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being porous
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- 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
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02205—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition
- H01L21/02208—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si
- H01L21/02214—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si the compound comprising silicon and oxygen
- H01L21/02216—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si the compound comprising silicon and oxygen the compound being a molecule comprising at least one silicon-oxygen bond and the compound having hydrogen or an organic group attached to the silicon or oxygen, e.g. a siloxane
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- 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
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02282—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process liquid deposition, e.g. spin-coating, sol-gel techniques, spray coating
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- 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
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
- H01L21/02318—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment
- H01L21/02337—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment treatment by exposure to a gas or vapour
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31652—Of asbestos
- Y10T428/31663—As siloxane, silicone or silane
Definitions
- the present invention relates to a method for modifying a porous film, a porous film modified by the modification method, a semiconductor material using the modified porous film, and a semiconductor device. More specifically, the present invention relates to a modified porous film having excellent hydrophobicity and mechanical strength that can be used for an optical functional material, an electronic functional material, and the like, and a method for modifying the porous film for obtaining the same. Background art
- zeolite and silica gel have been known as porous materials composed of Si— ⁇ bonds.
- Zeolite is a silica crystal with uniform pores, but has no pore diameter exceeding 13A.
- Silica gel has pores in the meso region of 2 to 50 nm, but the pore distribution is not uniform. Therefore, these materials could only be used for limited applications.
- porous inorganic oxides with uniform mesopores have uniform pores in the meso region and a large pore volume and surface area, so catalyst carriers, separation adsorbents, and fuel cells It is expected to be used for sensors.
- oxides with uniform mesopores synthesized by utilizing the self-assembly of organic and inorganic compounds have larger pores than conventional oxides. It is known to have volume and surface area.
- Oxides with uniform mesopores referred to here have a regular arrangement of pores (periodic pore structure) in the oxide, and exhibit structural regularity as measured by X-ray diffraction. Existence of diffraction peak Refers to those that are recognized.
- oxides having uniform mesopores produced by such a method have been prepared into a film form for use in optical functional materials, electronic functional materials, and the like. I have.
- the former method of depositing porous silica on the substrate surface requires a long time for film preparation, and the porous silica force often precipitates in powder form, resulting in low yield. There are disadvantages. Therefore, the latter method of evaporating the organic solvent is excellent for preparing a porous silica film.
- Examples of the solvent used in the method of evaporating the organic solvent to prepare a film on a substrate include a polyhydric alcohol glycol ether solvent, JP-A-2000-38509 describes a set ether ether solvent, an amide-based solvent, a ketone-based solvent, a carboxylic acid ester solvent and the like, and further discloses an organic solvent having an amide bond and an organic solvent having an ester bond.
- Such solvents are described in WO 99Z03926.
- Japanese Patent Application Laid-Open No. 2001-049174 proposes a method for producing a porous silica film by using a coating solution prepared using a co-condensate (co-gel) of methyl trialkoxysilane and tetraalkoxysilane. I have.
- the hydrophobicity of the obtained porous silica film is improved by using a coating solution in which the usage ratio of methyltrialkoxysilane, which is a hydrophobic component, is increased.
- the porous silica The proportion of the three-dimensional bond units of the Si-OS i bond that forms the framework of the system decreases, and the mechanical strength decreases significantly. Therefore, it is difficult to achieve both hydrophobicity and mechanical strength.
- US Pat. No. 5,939,141 reports a method of forming a film on a porous ceramic surface with a vapor of a low molecular weight silane compound in the presence of a platinum catalyst to make the film hydrophobic.
- a metal serving as a catalyst for forming a film is indispensable, so that the metal is present in the film. It is not preferable because it adversely affects the electrical characteristics such as rising.
- JP-A-5-202478, U.S. Patent Application Publication No. 2002098714, International Publication No. 02Z043119, and U.S. Patent No. 6348725 disclose that a cyclic siloxane compound is formed on a substrate by a plasma CVD method.
- a method has been reported.
- a cyclic siloxane compound is decomposed by plasma and deposited on a substrate to form a film. Therefore, the obtained film has a very low porosity, and for example, a low relative dielectric constant required for use as an interlayer insulating film of a semiconductor cannot be expected.
- very expensive equipment for generating plasma is required, which is economically preferable. I don't.
- the present invention solves the problems associated with the prior art as described above, and is intended to obtain a porous film having excellent hydrophobicity and mechanical strength that can be used for optical functional materials and electronic functional materials.
- An object of the present invention is to provide a method for modifying a film, a porous film modified by the method, a semiconductor material including the obtained porous film, and a semiconductor device using the semiconductor material.
- the present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that an organic silicon compound having a bonding unit in which a specific atom or group is bonded to Si is formed on a porous film mainly composed of Si— ⁇ bonds.
- the present inventors have found that a modified porous film having excellent hydrophobicity and mechanical strength can be obtained by contacting and heat-treating without using a metal catalyst.
- the method for modifying a porous film of the present invention comprises the steps of: providing a porous film mainly composed of Si—O bonds to a Si—X—Si bond unit (X is 0, NR, C n H 2n or C 6 H 4 , R is C m H 2m + 1 or C 6 H 5 , m is an integer of 1 to 6, n is 1 or 2, and S i —A bonding unit (A represents H, OH, ⁇ C e H 2e + 1 or a halogen atom, and e is an integer of 1 to 6.) (A in the same molecule) May be the same or different. ) It is characterized in that it is brought into contact with an organic gay compound and heat-treated without using a metal catalyst.
- the heat treatment is preferably performed at 100 to 600 ° C.
- the porous film before the treatment is preferably a film having mesopores.
- the average pore diameter of the porous film before the treatment is preferably in the range of 0.5 to 10 nm.
- the organosilicon compound is preferably a cyclic siloxane.
- the modified porous film of the present invention is obtained by the above method. Further, the semiconductor material of the present invention is characterized by comprising the modified porous film.
- a semiconductor device according to the present invention is characterized in that the semiconductor material is used.
- a porous film having excellent hydrophobicity and mechanical strength which can be used for an optical functional material or an electronic functional material, and which is suitably used for an interlayer insulating film as a semiconductor material. be able to.
- the modified porous film having excellent hydrophobicity and mechanical strength according to the present invention comprises contacting the porous film with an organic silicon compound having a specific structural unit and a group bonded to a specific Si to form a metal catalyst. It is obtained by heat treatment without using. First, the porous film used for the reforming process will be described.
- porous as used herein means that water molecules can freely enter from the outside and the diameter (in the present invention, the diameter of the pore means the diameter of the largest inscribed circle) is smaller than 100 nm.
- the pores Voids are also included.
- the porous film used for the modification treatment of the present invention is a porous film mainly composed of Si_ ⁇ bonds, and may partially contain an organic element.
- the term "consisting of Si-10 bonds" refers to a structure in which at least two or more 0 atoms are bonded to one Si atom and other Si atoms are bonded via the ⁇ atom. Is not particularly limited. For example, hydrogen, halogen, an alkyl group, a phenyl group, or a functional group containing these may be partially bonded to silicon.
- the ratio of Si and ⁇ in the porous film was confirmed by elemental analysis using XPS, and was in the range of 0.5 ⁇ S i / O (atomic ratio) ⁇ 1.0, and the weight fraction of Si was 40%. It is preferred that the content be at least 10 wt%.
- the bond of Si—O can be confirmed by IR. Typical examples include films composed of silica, hydrogenated silsesquioxane, methylsilsesquioxane, hydrogenated methylsilsesquioxane, dimethylsiloxane, and the like.
- the surface of the porous film of the present invention may be previously treated with a generally known surface treatment agent having a methyl group, a hydrogen group or the like.
- a porous film treated with hexamethyldisilazane (HMD S), trimethylsilyl chloride (TM S C), or monosilane can be used.
- the porous film modified in the present invention preferably has mesopores.
- the average pore diameter is preferably in the range of 0.5 nm to 10 nm. Within this range, a sufficient mechanical strength and a low dielectric constant can be achieved at the same time by the modification treatment described later.
- the average pore diameter of a film can be measured using a 3-sample fully automatic gas adsorption amount measuring apparatus, Autosob-3B type (manufactured by Cantachrome).
- the measurement in this case is performed by the nitrogen adsorption method at the temperature of liquid nitrogen (77 K), and the specific surface area can be obtained by the BET method and the pore distribution can be obtained by the BJH method.
- the porous film to be modified in the present invention is not particularly limited as long as it is the above-mentioned one.
- alkoxysilane is obtained by a sol-gel method.
- Zeolites on substrate surface A film made porous by crystal growth can be used.
- the production method is not particularly limited as long as a porous film can be obtained, but specifically, it can be produced as in the following example.
- a coating solution for forming a film is prepared.
- the coating solution is prepared by adding components such as alkoxysilane, catalyst, and water, which will be described later, and a solvent, if necessary, at 0 ° (to 70 ° C, preferably 30 to 50 ° C, for several minutes. It can be obtained by stirring for 5 to 5 hours, preferably for 1 to 3 hours.
- the alkoxysilane used for producing the porous film is not particularly limited, but specific examples thereof include quaternary alkoxysilanes such as tetramethoxysilane, tetraethoxysilane, tetraisopropoxysilane, and tetrabutylsilane; Tertiary alkoxyfluorosilanes such as fluorosilane, triethoxyfluorosilane, triisopropoxyfluorosilane, and tributoxyfluorosilane; CF 3 (CF 2 ) 3 CH 2 CH 2 S i ( ⁇ CH 3 ) 3 , CF 3 (CF 2 ) 5 CH 2 CH 2 S i ( ⁇ CH 3 ) 3 , CF 3 (CF 2 ) 7 CH 2 CH 2 S i (O CH 3 ) 3 , CF 3 (CF 2 ) 9 CH 2 CH 2 S i (OCH 3 ) 3 , (CF 3 ) 2 CF (CF 2 ) 4 CH 2 CH
- alkoxysilanes can be used alone or in combination of two or more.
- the catalyst used for preparing the coating solution at least one selected from an acid catalyst and an alkali catalyst can be used.
- Examples of the acid catalyst include inorganic acids and organic acids.
- Examples of the inorganic acids include hydrochloric acid, nitric acid, sulfuric acid, hydrofluoric acid, phosphoric acid, boric acid, and hydrobromic acid.
- Organic acids include, for example, acetic acid, propionic acid, butanoic acid, pentanoic acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, oxalic acid, maleic acid, methylmalonic acid, adipic acid, Sebacic acid, gallic acid, butyric acid, melitic acid, arachidonic acid, shikimic acid, 2-ethylhexanoic acid, oleic acid, stearic acid, Linoleic acid, linoleic acid, salicylic acid, benzoic acid, P-aminobenzoic acid, P-toluenesulfonic acid,
- Examples of the catalyst include an ammonium salt and a nitrogen-containing compound.
- Examples of the ammonium salt include tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, and hydroxylic acid. ⁇ f dang tetrabutylammonium and the like.
- nitrogen-containing compounds include, for example, pyridine, pyrrole, piperidine, 1-methylpiperidine, 2-methylpiperidine, 3-methylbiperidine, 4-methylbiperidine, piperazine, 1-methylbiperazine, 2-methylpiperazine, 4-dimethylpiperazine, pyrrolidine, 1-methylpyrrolidine, picoline, monoethanolamine, diethanolamine, dimethyl monoethanolamine, monomethyljetanolamine, triethanolamine, diazabicyclooctene, diazabicyclo Nonane, diazabicycloundecene, 2-pyrazoline, 3-pyrroline, quinukiridine, ammonia, methylamine, ethylamine, propylamine, butylamine, ⁇ , ⁇ ⁇ ⁇ ⁇ -dimethylamine, ⁇ , ⁇ ⁇ -jetylamine, ⁇ , ⁇ -dipropylamine , New, Nyu- Jibuchiruamin, Torimechirua Min, Tor
- Solvents that can be used for preparing the coating solution include, for example, methanol, ethanol, ⁇ -propanol, i-propanol, n-butanol, i-butanol, sec-butanol, t-butanol, and n-butanol.
- Ester solvents such as n-butyl succinate, n-amyl lactate, getyl malonate, dimethyl phthalate, dimethyl phthalate; N-methylformamide, N, N-dimethylformamide, N, N-getylformamide , Acetamide, N-methylacetamide, N, N-dimethylacetamide, N-methylpropionamide, N-methylpyrrolidone and the like.
- the solvent may be used alone or in combination of two or more. Can be.
- the method of adding each of these components is optional, and the order of addition is not particularly limited, but preferably, the addition of water to the alkoxysilane is performed twice in order to control hydrolysis, dehydration and condensation of the alkoxysilane. It is better to do it separately.
- the alkoxy group (molar ratio) of the water-containing alkoxysilane is 0.1 to 0.3, preferably 0.2 to 0.25. It is good to add.
- the second addition of water is optional, but it is preferable to add the water / alkoxysilane in an alkoxy group (molar ratio) of 1 to 10.
- the time between the first and second water addition is not particularly limited and can be set arbitrarily.
- catalyst 1: 0.1 to 0.001.
- a coating liquid obtained by adding these alkoxysilanes, catalysts, water, and, if necessary, a solvent and stirring for about several minutes to 5 hours is applied to a substrate to obtain a precursor of a porous film.
- the conditions for making the film porous can be controlled by changing the type of solvent or alkoxysilane used. Evaporation of the solvent by drying or baking, or removal of the alcohol component generated by hydrolysis causes pores to be formed. A film is obtained.
- any substrate can be used as long as it is generally used.
- glass, quartz, silicon wafers, stainless steel and the like can be mentioned.
- any shape such as a plate shape and a dish shape may be used.
- Examples of the method of applying to the substrate include a general method such as a spin coating method, a casting method, and a dip coating method.
- a spin coating method a substrate is placed on a spinner, a sample is dropped on the substrate, and the sample is rotated at 500 to 1000 rpm. A thick porous film is obtained.
- the drying conditions are not particularly limited as long as the solvent and the alcohol component can be evaporated.
- the firing conditions are not particularly limited as long as the firing promotes the condensation of silanol groups in the film. Therefore, the firing can be performed in any of the air, an inert gas, and a vacuum. However, if H or methyl groups are present in the film, it is desirable to fire at a temperature at which these do not decompose. Specifically, baking in nitrogen at 250 to 450 ° C. is preferred.
- an alcohol component generated by hydrolysis of the solvent or the alkoxysilane can be removed by an organic solvent or a supercritical fluid having a small surface tension.
- removal with a supercritical fluid having no surface tension by adjusting the pressure and temperature is preferable because the pores of the film are not collapsed and a very porous material can be obtained.
- the porous film is obtained in a free-standing state or in a state of being fixed to a substrate.
- the pores of the obtained film can be confirmed to have an average pore diameter of 0.5 nm to 10 nm by TEM observation of the film and measurement of the pore distribution.
- the thickness of the film varies depending on the manufacturing conditions, but is generally in the range of 0.05 to 2 m.
- a compound having a long-chain alkyl group and a hydrophilic group can be usually used.
- the long-chain alkyl group preferably has 8 to 24 carbon atoms, more preferably has 12 to 18 carbon atoms
- the hydrophilic group includes, for example, a quaternary ammonium salt group.
- such a surfactant has a general formula
- the surfactant represented by the above general formula forms micelles in the coating solution and is regularly arranged.
- the micelles become ⁇ type, and a silica and a surfactant obtained by hydrolysis and dehydration condensation of alkoxysilane form a complex.
- a porous film having uniform and regularly arranged pores can be prepared by removing the ⁇ -type surfactant.
- a compound having a polyalkylene oxide structure can also be used.
- the polyalkylene oxide structure include a polyethylene oxide structure, a polypropylene oxide structure, a polytetramethylene oxide structure, and a polybutylene oxide structure.
- Such a compound having a polyalkylene oxide structure include a polyoxyethylene polyoxypropylene block copolymer, a polyoxyethylene polyoxybutylene block copolymer, and a polyoxyethylene polyoxypropylene copolymer.
- Ether compounds such as lenalkyl ether, polyethylene alkyl ether, polyoxyethylene alkyl phenyl ether; polyoxyethylene glycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyethylene sorbitol fatty acid ester, sorbitan fatty acid ester, Examples thereof include ether ester type compounds such as propylene glycol fatty acid ester and sucrose fatty acid ester.
- the surfactant can be used alone or in combination of two or more selected from the above.
- the addition ratio of the alkoxysilane, the catalyst, and water is the same as in the case of (1) above.
- the amount of the surfactant to be added is preferably from 0.02 to 0.6 times, more preferably from 0.005 to 0.15 times in molar ratio to the alkoxysilane.
- the form in which the surfactant is added is not limited, and may be any of a solid state, a liquid state, and a state dissolved in a solvent.
- a periodic structure such as a 2D-hexagonal structure, a 3D-hexagonal structure, or a cubic structure can be obtained according to the method described in (2) above.
- a porous film having a pore structure can be produced.
- the coating solution prepared as described above is applied to a substrate and dried in the same manner as in the above-mentioned method (1), and then fired or organic.
- the surfactant may be removed by extraction with a solvent.
- the pores of the obtained porous film can be confirmed to have an average pore diameter of l nm to 10 nm by TEM observation of the cross section of the film and measurement of the pore distribution.
- the interplanar spacing is 1.3 nm by X-ray diffraction (CuKa). A diffraction peak in the range of ⁇ l3 nm can be confirmed.
- the obtained porous film has pores of a cubic structure, and in particular, the pores have a pore narrow space of 1 to 40 people, preferably 2 to 25 A in the pores. If it has, the narrow portion can be easily closed by the modification treatment described later, and a porous film in which at least a part of the narrow hole portion is closed can be obtained. The measurement of the size of the narrow portion of the pore is confirmed by an electron beam structure analysis method.
- the porous film obtained in this way has excellent hydrophobicity, and when used as a semiconductor material, can be a porous film capable of preventing diffusion of a barrier metal.
- the porous film having narrow pores has a 2D-hexagonal structure or a 3D-hexagonal structure in which narrow portions are formed in pores, in addition to a porous film having a cubic structure. It can also be obtained with a porous film.
- a coating solution is prepared by partial hydrolysis and dehydration condensation.
- the surfactant and the silicone oil are mixed in advance to prepare a mixed solution, and the mixed solution is added to the partially hydrolyzed and dehydrated alkoxysilane.
- “partially hydrolyzed or dehydrated and condensed” means a state in which the mixed solution is fluidized without gelling. It is generally a less than this state of regarded as viscosity gelled exceeds 1 0 5 p 0 ise.
- the coating liquid By preparing the coating liquid in this way, it is considered that surfactants are arranged around silicone oil and micelles are formed. After that, the coating solution was applied to the substrate, dried, and then the surfactant was removed by baking, and the silicone oil taken in the center of the micelle adhered to the inner surface of the pores of the porous film. It is considered that the above-mentioned narrow portion is formed because it remains in the state.
- silicone oil examples include, but are not particularly limited to, organosilicon compounds containing polydimethylsiloxane as a main component. These include trimethylsiloxy-terminated polydimethylsiloxanes, copolymers of polyphenylsiloxane and polydimethylsiloxane, copolymers of polyphenylmethylsiloxane and polydimethylsiloxane, poly-1,3,3,3-trifluoro.
- Copolymer of propylmethylsiloxane and polydimethylsiloxane Copolymer of polyethyleneoxide and polydimethylsiloxane, copolymer of polypropyleneoxide and polydimethylsiloxane, hydride-terminated polydimethylsiloxane, polymethylhydridosiloxane and polydimethylsiloxane And silanol-terminated polydimethylsiloxane.
- the silicone oil used in the present invention may be used alone or in combination of two or more selected from these.
- the amount of silicone oil added is preferably 1 to 100 parts by weight, more preferably 5 to 50 parts by weight, based on 100 parts by weight of the alkoxysilane. By adjusting the amount of the silicone oil added to the above range, it is possible to reduce A porous film can be easily prepared.
- a porous film can also be obtained by growing zeolite on the substrate surface.
- the production method is not particularly limited, but specifically, for example, it can be produced as follows.
- a coating liquid containing microcrystals of zeolite obtained by hydrothermal synthesis using an alkoxyamine or colloidal silica as a silica source and an organic amine as a zeolite is applied to a substrate, dried and fired. Manufacturing.
- a surfactant is added to a coating liquid containing zeolite microcrystals obtained by hydrothermal synthesis using an alkoxyamine ⁇ colloidal silica or the like as a silica source and an organic amine as a zeolite. Coating, drying and baking.
- Examples of the organic amine that can be used in the above-mentioned production include tetrapropyl ammonium hydroxide, hydroxyethyltetraethylammonium, tetrabutylammonium hydroxide, hydroxytetrapentylammonium hydroxide, and tripropyl hydroxide.
- the porous film as described above may be provided with a Si—X—Si bond unit (X represents ⁇ , NR, C n H 2n or C 6 H 4 ; Represents C m H 2m + 1 or C 6 H 5 , m is an integer of 1 to 6, n is 1 or 2, and at least one Si—A bond unit (A is H, ⁇ H, ⁇ C e H 2e +1 or a halogen atom, and A in the same molecule may be the same or different, and e is an integer of 1 to 6.)
- This is a method of improving hydrophobicity and mechanical strength by contacting and heat-treating without using a metal catalyst.
- the organosilicon compounds having one or more Si—X—Si bond units and two or more Si—A bond units at any temperature in the temperature range of 100 to 600 ° C. It is preferable that it shows a vapor pressure and does not decompose in a state where only the compound exists. Further, the organic silicon compound needs to have a molecular diameter that sufficiently diffuses into the pores of the porous film.
- the molecular weight is preferably 900 or less, 70 or more, and preferably 600 or less and 120 or more. Are more preferred, and those of 300 or less and 170 or more are still more preferred.
- Examples of such an organic silicon compound include a cyclic organic silicon compound such as a cyclic siloxane and a cyclic silazane, and other noncyclic organic gay compounds. Among them, cyclic siloxane is preferable.
- the organic silicon compound is represented by the general formula (I) L (SiR 3 R 4 O) L (SiR 5 R 6 0) m (SiR 7 R 8 0) n-
- R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 may be the same or different from each other, and are each H, OH, C 6 H 5 , C a H 2a + CF 3 (CF 2 ) b (CH 2 ) c , C d H 2d- ⁇ C e H 2e + or a halogen atom, a is an integer of 1 to 3, b is an integer of 0 to 10, c is 0 to An integer of 4, d is an integer of 2 to 4, e is an integer of 1 to 6, L is an integer of 0 to 8, m is an integer of 0 to 8, n is an integer of 0 to 8, and 3 ⁇ an L + m + n ⁇ 8, the S i-a bond units (a in the formula H, ⁇ _H showed OC e H 2e + have or halogen atom, a in the same molecule be the same or different At least two cyclic siloxanes represented by the formula (1)
- RR 2 may be the same or different from each other, H, respectively, OH, C eH 5, C a H 2a + i, and r 3 (CF 2) b (and H 2) c, C d H 2d- 1 "OC e H 2e + 1 >
- a lia is a halogen atom
- a is an integer of 1-3
- b is an integer of 0-10
- c is an integer of 0-4
- d is an integer of 2-4
- e is an integer from 1 to 6
- p is an integer of 3 to 8
- S i _A bond units (a in the formula represents H, ⁇ _H, the OC e H 2e + have or halogen atom, the same A in the molecule may be the same or different.)
- At least two cyclic siloxanes represented by are included.
- R 1 () , R 11 , R 12 , and R 13 may be the same or different from each other, and are each H, C 6 H 5 , C a H 2a + 1 , CF 3 (CF 2 ) b (CH 2 ) c , OC e H 2e + or a halogen atom, a is an integer of 1-3, b is an integer of 0-10, c is an integer of 0-4, e is 1-6 Where Z is ⁇ , (CH 2 ) d , C 6 H 4 , ( ⁇ S i R a R b ) n ⁇ , OS i R c R d QS i R e R f ⁇ , or NR g R a , R b , R c , R d , R e , and R f may be the same or different from each other, and each of H, ⁇ H, C 6 H 5 , C a H 2a +1 , CF 3 (
- At least one organic gay compound represented by the following formula (1) can also be used.
- organic silicon compound a compound represented by the general formula ( ⁇ )
- R 15 , R 16 , R 18 , R 19 , R 21 , and R 22 may be the same or different from each other, and are each H, ⁇ H, C 6 H 5 , C a H 2a +1 , CF 3 (CF 2 ) b (CH 2 ) c , OC e H 2e +1 or a halogen atom, and R 17 , R 2Q , and R 23 may be the same or different, and each may be C 6 H 5 or C a H 2a +1 ; a is an integer of 1 to 2, b is an integer of 0 to 10, c is an integer of 0 to 4, e is an integer of!
- S i — A bond unit (A is H, OH, ⁇ shows the C e H 2e + have or halogen atom, a in the same molecule at least one cyclic silazane may also be used are represented by.) which may be the same or different.) are included at least two be able to.
- 1,2,3,4,5,6-hexamethylcyclotrisilazane 1,3,5,7-tetraethyl-2,4,6,8-tetramethylcyclotetrasilazane
- 1,2 Cyclic silazane compounds such as 2,3, -triethyl-2,4,6-triethylcyclotrisilazane.
- the cyclic siloxane represented by the general formula (I), the organic silicon compound represented by the general formula ( ⁇ ), and the general formula (m) May be used alone or in combination of two or more selected from the cyclic silazanes represented by Among them, the cyclic siloxane represented by the general formula (I) is preferable.
- the contact between the porous film and the organosilicon compound is performed in a liquid or gaseous atmosphere.
- a liquid or gaseous atmosphere Can be implemented below.
- the contact treatment is carried out in the liquid phase, it may be carried out using an organic solvent.
- organic solvents include alcohols such as methanol, ethanol, n-propyl alcohol, and isopropyl alcohol; Ethers such as ter, diethylene glycol dimethyl ether, 1,4-dioxane, and tetrahydrofuran; and arylalkanes such as benzene, toluene, and xylene.
- the concentration of the organic silicon compound is not particularly limited, and the treatment can be carried out at any concentration.
- the organic silicon compound When the contact treatment is performed in a gas phase, the organic silicon compound may be diluted with a gas.
- the diluent gas that can be used include air, nitrogen, argon, and hydrogen. It is also possible to carry out under reduced pressure instead of diluting with gas. It is preferable to use a gaseous atmosphere as the treatment atmosphere because the solvent recovery and drying steps become unnecessary.
- the concentration of the organic silicon compound is not particularly limited as long as it is 0.1 V o 1% or more.
- the gas containing the organic gay compound which is arbitrarily diluted may be brought into contact with the gas while aeration is performed, the gas may be brought into contact with the gas being recycled, or the gas may be contacted while being sealed in a closed container.
- the heat treatment temperature of the porous film and the organic silicon compound is preferably in the range of 100 to 600 ° C, more preferably in the range of 300 to 450 ° C.
- the heating method may be a hot plate type or an electric furnace type as long as the substrate temperature can be made uniform, and is not particularly limited.
- the temperature of the porous film may be gradually increased to the heat treatment temperature, or if the heat treatment temperature is lower than the sintering temperature, there is no particular problem even if the porous film is inserted into the atmosphere at that temperature at a stretch. After firing the porous film, the above heat treatment can be performed subsequently.
- the time required for heat treatment of the porous film and the above-mentioned organic silicon compound is usually several minutes to 40 hours, preferably 10 minutes to 24 hours, depending on the treatment temperature.
- the improvement in hydrophobicity and mechanical strength is due to the presence on the porous film surface. It is guessed that the reaction between the silanol group and the organic gay compound is the main factor.
- This silanol group is generally present on the surface of a porous film mainly composed of Si-0 bonds. Particularly in the case of a porous material, many silanol groups are present inside the pores. Silanol groups can be reduced by introducing a hydrophobic group or the like, but it is still difficult to completely remove silanol groups by heat treatment up to 600 ° C. If the heat treatment temperature rises, the dehydration reaction proceeds further, so that the silanol group decreases. Therefore, when water is added to the porous film, silanol groups increase due to hydrolysis, so that the organic silicon compound is apt to react, and for the modification treatment to improve hydrophobicity and mechanical strength, preferable.
- the modification treatment may be carried out by adding water when the porous film is brought into contact with the organic gay compound.
- the appropriate amount of water to be added is determined according to the type of the organic gay compound to be brought into contact with the porous film. However, in the case of treatment in the gas phase, it is preferably 0.05 to 25 kP. An amount in the range corresponding to the partial pressure of a is preferred. Within this range, there is no possibility that the effect is not exhibited due to too little water addition, and there is no adverse effect that the pore structure is collapsed due to too much water.
- the temperature at the time of adding water is not particularly limited as long as it is lower than the reaction temperature.
- the porous film is improved in hydrophobicity and mechanical strength by being subjected to heat treatment in contact with the organic silicon compound.
- the organic silicon compound reacts on the surface of the porous film and is bonded to the surface, or the other organic silicon compound is polymerized on the surface, or the organic silicon compound is polymerized. It is thought that the reactant forms a film on at least a part of the surface, and as a result, not only develops hydrophobicity but also improves mechanical strength.
- the porous film surface as used herein includes not only the outer surface of the film but also the inner surface of the pores.
- the reacted organosilicon compound When such a reaction occurs in the pores, the reacted organosilicon compound is thought to form and cover a structure like a ivy crawling on the surface in the film pores.
- a bridge-like structure such as a pillar can be formed in pores of several nm. It is presumed that the unique structure formed in such pores not only generates hydrophobicity but also contributes to the development of mechanical strength, which was not known before.
- the reaction needs to proceed on the inner surface of the pores of the film, and the catalyst must not be present together with the supplied organosilicon compound at a heat-treatable temperature of 100 to 600 ° C. It is particularly preferable that the catalyst is not accompanied by the organic silicon compound.
- the presence of the catalyst in the porous film is not considered to be a particular problem, but if the catalyst is a metal, the metal will remain in the film and even increase the dielectric constant of the film. Not preferred. Therefore, in the reforming treatment of the present invention, it is an important requirement that heat treatment be performed without using a metal catalyst.
- S i - X - S i coupling unit (X is ⁇ , NR, shows a C n H 2 n or C 6 H 4, R is C m H 2 m + 1 or indicates C 6 H 5, m is an integer from 1 to 6, n is 1 or 2.) one or more, and S i-a bond units (a is H, ⁇ _H, OC e H 2 e + 1 or a halogen atom. And e is an integer from 1 to 6. ), It is possible to improve both hydrophobicity and mechanical strength.
- X is not particularly limited as long as it is strongly bonded to Si even in the heat treatment, but is preferably ⁇ ⁇ because the porous film has a structure mainly composed of Si— ⁇ bonds.
- the above-mentioned S i -X-S i bonding unit can exert its effect if it has 1 to 6 units, but preferably 2 to 4 units are connected continuously. Is more preferable, and more preferably a ring shape.
- the number of the Si—A bond units is no particular limitation on the number of the Si—A bond units as long as they are two or more.
- the Si_H binding units are particularly preferred.
- Organic silicon compounds react with water to form Si-OH, which causes a dehydration condensation reaction with other OH groups.
- Si—H it can directly dehydrogenate with Si_OH present on the surface.
- the organic silicon compound a compound having an OH group may be used from the beginning, but in this case, the reactivity is high, so the ratio of diffusing into the pore and reacting with the inner surface of the pore will decrease. It is. Comparing the reactivity when A is hydrogen, an alkoxy group and a halogen atom, the order is halogen atom> alkoxy group> hydrogen.
- the organic gayne compound having a Si-A bond unit has a low boiling point and is easy to handle, and also has little steric hindrance and is easily diffused.
- A is a nodogen atom, it is likely to diffuse into the pores as described above and react with the inner surface of the pores, because the reaction is easy.
- A is an alkoxy group (OR)
- the diffusion in the mesopores is slow, and the alcohol produced by the reaction interacts with water and inhibits the reaction of Si-OR with water. Conceivable. From the above, it is presumed that among the Si—A bonding units, the Si—H bonding units are most effective for the purpose of the present invention.
- the porous film used for obtaining the modified porous film having excellent hydrophobicity and mechanical strength of the present invention may be in a state of a free-standing film or a state of being formed on a substrate. Absent.
- the porous film does not cause defects such as clouding and coloring after the treatment with the organic silicon compound, it is also used when a transparent film is required. Can be.
- the hydrophobicity of the porous film is confirmed by measuring the relative permittivity.
- a high relative dielectric constant indicates insufficient hydrophobicity.
- the relative permittivity is measured by depositing aluminum electrodes on the porous film surface formed on the front surface of the silicon wafer and the back surface of the silicon wafer by vapor deposition at 25 ° C and 50% relative humidity, at a frequency of 100 kHz. Can be performed by a conventional method.
- the mechanical strength of the porous film of the present invention is confirmed by measuring the elastic modulus of the film by measuring nanoindene.
- the nanoindene measurement was carried out using Tribo Scope System manufactured by Hysitron.
- the modified porous film of the present invention is excellent in both hydrophobicity and mechanical strength, it can be used for optical functions such as interlayer insulating films, molecular recording media, transparent conductive films, solid electrolytes, optical waveguides, and color members for LCDs. It can be used as a material or electronic functional material.
- strength, heat resistance and low dielectric constant are required for an interlayer insulating film as a semiconductor material, and a porous film obtained by the present invention and having excellent hydrophobicity and mechanical strength is preferably used.
- a low-dielectric-constant semiconductor material made of such a porous film could not be produced, but the present invention has made it possible to use it for a semiconductor device.
- a porous film is formed on the surface of a silicon wafer, and the porous film is contacted with the organic silicon compound for modification.
- the modified porous film is patterned with a photoresist, and etched according to the pattern.
- a barrier film made of titanium nitride (TiN) / tantalum nitride (TaN) is formed on the surface of the porous film and the surface of the etched portion by a vapor phase growth method.
- a copper film is formed by a metal CVD method, a sputtering method, or an electrolytic plating method, and an unnecessary copper film is removed by a chemical mechanical polishing (CMP) to form a circuit wiring.
- CMP chemical mechanical polishing
- a cap film for example, a film made of silicon carbide
- a hard mask for example, a film made of silicon nitride
- the obtained wafer is singulated into semiconductor chips, mounted on a package, and placed in a package.
- the semiconductor device according to the invention can be manufactured.
- Hydrochloric acid For ultra-trace analysis manufactured by Wako Pure Chemical Industries, Ltd.
- Poly (alkylene oxide) block copolymer H ⁇ (CH 2 CH 2 O) 20 (CH 2 CH (CH 3 ) O) 70 (CH 2 CH 2 O) 20 H (manufactured by 883 companies? 1 ur on ic PI 23) is weighed in an amount of 70 g, dissolved in 700 g of ethanol, ion-exchanged with ion exchange resin (SK1BH) manufactured by Nippon Shusui Co., Ltd., and ethanol is removed by distillation to remove metal. What was processed.
- SK1BH ion-exchanged with ion exchange resin manufactured by Nippon Shusui Co., Ltd.
- Water Water that has been demetallized using a pure water production device manufactured by Mi 11 ipore
- N, N-Dimethylacetamide Kanto Chemical Co., Ltd.
- Tridecafluoro-1,1,2,2-tetrahydrooctyl-1-triethoxysilane Tokyo Chemical Industry Co., Ltd., CF 3 (CF 2 ) 5 CH 2 CH 2 S i (OC 2 H 5 ) 3 2 — (Methoxy (polyethyleneoxy) propyl) trimethylsilane: manufactured by Radimax Co., Ltd., CH 30 (CH 2 CH 2 ⁇ ) 6 — 9 (CH 2 ) 3 Si (OCH 3 ) 3
- the prepared coating solution was dropped on the surface of an 8-inch silicon wafer by several m1 and rotated at 20000 rpm for 10 seconds to apply it to one surface of the silicon wafer.Then, it was dried at 100 ° C for 1 hour, and then dried for 400 hours. It was baked at ° C for 3 hours to prepare a porous film. (Modification of porous film)
- the porous film obtained above was packed in a quartz reaction tube, and allowed to stand at 400 for 30 minutes under aeration of nitrogen at 50 OmL / min. Then, nitrogen was passed through an evaporator at 25 ° C containing 1,3,5,7-tetramethylcyclotetrasiloxane as an organic gay compound, and into the reaction tube together with 1,3,5,7-tetramethylcyclotetrasiloxane. Cyclotetracyxane was introduced. After one hour, the introduction of 1,3,5,7-tetramethylcyclotetrasiloxane was stopped, and the reaction tube was cooled to 30 ° C under aeration of 50 OmL / min of nitrogen to modify the porous film. Got.
- the average pore size of the porous film was 1.5 nm.
- the average pore diameter was measured by a nitrogen adsorption method at a liquid nitrogen temperature (77 K) using a three-sample fully automatic gas adsorption measuring device, Auto Soap-3B (manufactured by Cantachrome).
- the relative dielectric constant is determined by depositing an aluminum electrode on the surface of the porous film on the substrate and the back surface of the silicon wafer used for the substrate by a vapor deposition method to form a metal-insulating film-silicon-metal structure. % At a frequency of 100 kHz, in an atmosphere of 40% to 4 OV, and the film thickness measured with a Dicktack film thickness meter. I asked.
- the elastic modulus of the porous film was measured by nanoindene measurement using Triboscopy System, manufactured by Hystron Corporation.
- Table 1 shows the relative dielectric constant and elastic modulus of the porous film before and after the modification treatment.
- a porous film was prepared in the same manner as in Example 1. As a result of X-ray diffraction measurement, this porous film retained a periodic 2D-hexagonal structure with a plane spacing of 7. Onm. The average pore size of the porous film was 5.8 nm. Then, reforming was performed in the same manner as in Example 1. Table 1 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- a porous film was prepared in the same manner as in Example 1. X-ray diffraction confirmed that the obtained porous film had a zeolite structure. The porous film had pores with a peak at 7.1 nm in addition to the pores derived from zeolite. Then, reforming was performed in the same manner as in Example 1. Table 1 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- a poly (alkylene oxide) block copolymer (Plionic P123 manufactured by BASF) was dissolved in 30 mL of ethanol to obtain a component solution (C).
- the component (B) solution was added to the component (C) solution and stirred.
- the mixed solution of the (C) component solution and the (B) component solution was added to the (A) component solution and stirred. 8 mL of water was added to this solution with stirring, and a transparent and uniform coating solution was obtained.
- a porous film was prepared in the same manner as in Example 1. As a result of X-ray diffraction measurement, the obtained porous film retained a 2D-hexagonal structure. The average pore diameter of the porous film was 5.5 nm. Then, reforming was performed in the same manner as in Example 1. Table 1 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- component (A) solution After mixing 10.0 g of tetraethoxysilane and 1 OmL of ethanol at room temperature, 1. OmL of 11 ⁇ hydrochloric acid was added and stirred to obtain a component (A) solution. 0.60 g of Tridecafluoro 1,1,2,2-tetrahydrooctyl-1-triethoxysilane, 0.63 g of 2- (methoxy (polyethyleneoxy) propyl) trimethylsilane and methyltriethoxysilane After mixing and stirring 0.14 g and 1 OmL of ethanol, 0.46 mL of 1 hydrochloric acid was added and stirred to obtain a component (B) solution.
- a poly (alkylene oxide) block copolymer manufactured by 883 Company? 1111: 0nicP123 was dissolved in 3 OmL of ethanol to obtain a component (C) solution.
- the (B) component solution was added to the (C) component solution and stirred.
- the mixed solution of the (C) component solution and the (B) component solution was added to the (A) component solution and stirred. 8 mL of water was added to this solution and stirred to obtain a transparent and uniform coating solution.
- a porous film was prepared in the same manner as in Example 1. As a result of X-ray diffraction measurement, the obtained porous film retained a 2D-hexagonal structure. The average pore size of the porous film was 5.2 nm. Then, reforming was performed in the same manner as in Example 1. Table 1 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment. (Example 7)
- 2.8 g of poly (alkylene oxide) block copolymer (P1 uronic P123 manufactured by BASF) was dissolved in 3 OmL of ethanol to obtain a component (C) solution.
- the component solution (B) was added to the component solution (C) and stirred.
- the mixed solution of the component solution (C) and the component solution (B) was added to the component solution (A) and stirred.
- 8 mL of water was added and stirred to obtain a transparent and uniform coating solution.
- a porous film was prepared in the same manner as in Example 1. As a result of X-ray diffraction measurement, the obtained porous film retained a 2D-hexagonal structure. The average pore diameter of the porous film was 5.5 nm. Then, reforming was performed in the same manner as in Example 1. Table 1 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- 2.8 g of poly (alkylene oxide) block copolymer (P1 uronic P123 manufactured by BASF) was dissolved in 3 OmL of ethanol to obtain a component (C) solution.
- the component (B) solution was added to the component (C) solution and stirred.
- the mixed solution of the component solution (C) and the component solution (B) is (A) The solution was added to the component solution and stirred. 8 mL of water was added to this solution and stirred to obtain a transparent and uniform coating solution.
- a porous film was prepared in the same manner as in Example 1. As a result of X-ray diffraction measurement, the obtained porous film retained a 2D-hexagonal structure. The average pore diameter of the porous film was 5.4 nm. Then, reforming was performed in the same manner as in Example 1. Table 1 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- a porous film was prepared in the same manner as in Example 1. As a result of X-ray diffraction measurement, the obtained porous film retained a 2D-hexagonal structure. The average pore diameter of the porous film was 5.5 nm. Then, reforming was performed in the same manner as in Example 1. Table 1 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- a porous film was prepared in the same manner as in Example 1. As a result of X-ray diffraction measurement, the obtained porous film had a 2D-hexagonal structure. The average pore diameter of the porous film was 4.9 nm. Then, reforming was performed in the same manner as in Example 1. Table 1 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- a porous film was prepared in the same manner as in Example 1. As a result of X-ray diffraction measurement, the obtained porous film retained a 2D-hexagonal structure. The average pore diameter of the porous film was 4.9 nm. Then, reforming was performed in the same manner as in Example 1. Table 1 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- a porous film was prepared in the same manner as in Example 1. As a result of X-ray diffraction measurement, the obtained porous film retained a 2D-hexagonal structure. The average pore size of the porous film was 5. Onm. Then, reforming was performed in the same manner as in Example 1. Table 1 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- a porous film was prepared in the same manner as in Example 1. As a result of X-ray diffraction measurement, no clear regularity was observed in the obtained porous film. The average pore size of the porous film was 4.9 nm. Then, reforming was performed in the same manner as in Example 1. Table 1 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- the reforming was performed in the same manner as in Example 2 except that water was also entrained by passing the introduced gas through a water evaporator at 25 ° C.
- Table 2 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the reforming treatment.
- the reforming was performed in the same manner as in Example 2 except that the reforming temperature at 400 ° C was changed to 250 ° C.
- Table 2 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- Example 16 The reforming was performed in the same manner as in Example 2, except that the reforming time for 30 minutes was changed to 5 minutes.
- Table 2 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- the modification was performed in the same manner as in Example 2 except that 1,3,3,5,5-hexamethyltrisiloxane was changed.
- Table 2 shows the relative dielectric constant and elastic modulus before and after the modification treatment of the obtained porous film.
- a porous film was prepared and modified in the same manner as in Example 1.
- the pore size was determined from the electron density distribution obtained by Fourier transforming the electron diffraction points using an ultra-high resolution analytical electron microscope (HREM) (Model JEM-3010, manufactured by JEOL Ltd.). As a result, a narrow portion having a pore diameter of about 15 A was found in the pores. The average pore size of the porous film is 7.Onm I got it.
- the modified porous film was placed in a vacuum chamber, and 10% pentakis (ethylmethylamide) tantalum-containing isopropyl alcohol vapor and NH 3 gas were introduced into the chamber. TaN was formed on the porous film at 400 ° C. As a result of TEM observation of the cross section of the porous film after TaN film formation, no diffusion of TaN was observed in the pores.
- a porous film was prepared and modified in the same manner as in Example 1.
- Example 1 The modification was carried out in the same manner as in Example 2, except that 1,3,5,7-tetramethylcyclotetrasiloxane was changed to hexamethyldisilazane.
- Table 3 shows the relative dielectric constant and elastic modulus of the obtained porous film before and after the modification treatment.
- the modified porous film obtained by the present invention and having both excellent hydrophobicity and mechanical strength, which can be used for an optical functional material or an electronic functional material, can be suitably used for an interlayer insulating film as a semiconductor material. Further, higher integration of the semiconductor device can be achieved.
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| CNB038213141A CN1331745C (zh) | 2002-09-09 | 2003-09-08 | 多孔质薄膜的改质方法及被改质的多孔质薄膜及其用途 |
| EP20030797557 EP1547975B1 (en) | 2002-09-09 | 2003-09-08 | Method for modifying porous film, modified porous film and use of same |
| US10/526,688 US7807267B2 (en) | 2002-09-09 | 2003-09-08 | Method of modifying porous film, modified porous film and use of same |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2006025501A1 (ja) * | 2004-09-02 | 2006-03-09 | Rohm Co., Ltd. | 半導体装置の製造方法およびこれを用いて形成された半導体装置 |
| US7384622B2 (en) | 2004-08-31 | 2008-06-10 | National Institute Of Advanced Industrial Science And Technology | Zeolite nano-crystal suspension, zeolite nano-crystal production method, zeolite nano-crystal suspension production method, and zeolite thin film |
| WO2009123104A1 (ja) | 2008-04-02 | 2009-10-08 | 三井化学株式会社 | 組成物及びその製造方法、多孔質材料及びその形成方法、層間絶縁膜、半導体材料、半導体装置、並びに低屈折率表面保護膜 |
| US7652119B2 (en) * | 2004-11-11 | 2010-01-26 | Kaneka Corporation | Curable composition |
| US7749920B2 (en) * | 2003-07-17 | 2010-07-06 | Rorze Corporation | Low dielectric constant films and manufacturing method thereof, as well as electronic parts using the same |
| WO2010137711A1 (ja) | 2009-05-29 | 2010-12-02 | 三井化学株式会社 | 半導体用シール組成物、半導体装置および半導体装置の製造方法 |
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| US9339770B2 (en) | 2013-11-19 | 2016-05-17 | Applied Membrane Technologies, Inc. | Organosiloxane films for gas separations |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7749920B2 (en) * | 2003-07-17 | 2010-07-06 | Rorze Corporation | Low dielectric constant films and manufacturing method thereof, as well as electronic parts using the same |
| US8158536B2 (en) | 2003-07-17 | 2012-04-17 | Rorze Corporation | Low dielectric constant films and manufacturing method thereof, as well as electronic parts using the same |
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| WO2006025501A1 (ja) * | 2004-09-02 | 2006-03-09 | Rohm Co., Ltd. | 半導体装置の製造方法およびこれを用いて形成された半導体装置 |
| KR101018926B1 (ko) | 2004-09-02 | 2011-03-02 | 로무 가부시키가이샤 | 반도체 장치의 제조 방법 및 이 방법을 이용하여 형성된반도체 장치 |
| US7652119B2 (en) * | 2004-11-11 | 2010-01-26 | Kaneka Corporation | Curable composition |
| JPWO2009123104A1 (ja) * | 2008-04-02 | 2011-07-28 | 三井化学株式会社 | 組成物の製造方法、多孔質材料及びその形成方法、層間絶縁膜、半導体材料、半導体装置、並びに低屈折率表面保護膜 |
| WO2009123104A1 (ja) | 2008-04-02 | 2009-10-08 | 三井化学株式会社 | 組成物及びその製造方法、多孔質材料及びその形成方法、層間絶縁膜、半導体材料、半導体装置、並びに低屈折率表面保護膜 |
| JP2010090389A (ja) * | 2008-04-02 | 2010-04-22 | Mitsui Chemicals Inc | 組成物及びその製造方法、多孔質材料及びその形成方法、層間絶縁膜、半導体材料、半導体装置、並びに低屈折率表面保護膜 |
| US8603588B2 (en) | 2008-04-02 | 2013-12-10 | Mitsui Chemicals, Inc. | Composition and method for production thereof, porous material and method for production thereof, interlayer insulating film, semiconductor material, semiconductor device, and low-refractive-index surface protection film |
| WO2010137711A1 (ja) | 2009-05-29 | 2010-12-02 | 三井化学株式会社 | 半導体用シール組成物、半導体装置および半導体装置の製造方法 |
| WO2013108791A1 (ja) | 2012-01-17 | 2013-07-25 | 三井化学株式会社 | 半導体用シール組成物、半導体装置及びその製造方法、並びに、ポリマー及びその製造方法 |
| WO2014013956A1 (ja) | 2012-07-17 | 2014-01-23 | 三井化学株式会社 | 半導体装置及びその製造方法並びにリンス液 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1547975B1 (en) | 2012-02-22 |
| TWI273090B (en) | 2007-02-11 |
| KR100671850B1 (ko) | 2007-01-19 |
| CN1331745C (zh) | 2007-08-15 |
| US7807267B2 (en) | 2010-10-05 |
| TW200404742A (en) | 2004-04-01 |
| US20060040110A1 (en) | 2006-02-23 |
| EP1547975A4 (en) | 2010-08-04 |
| KR20050057283A (ko) | 2005-06-16 |
| EP1547975A1 (en) | 2005-06-29 |
| CN1681737A (zh) | 2005-10-12 |
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