WO2005014743A1 - コーティング組成物、およびそれを用いて製造した低誘電シリカ質材料 - Google Patents
コーティング組成物、およびそれを用いて製造した低誘電シリカ質材料 Download PDFInfo
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- WO2005014743A1 WO2005014743A1 PCT/JP2004/011135 JP2004011135W WO2005014743A1 WO 2005014743 A1 WO2005014743 A1 WO 2005014743A1 JP 2004011135 W JP2004011135 W JP 2004011135W WO 2005014743 A1 WO2005014743 A1 WO 2005014743A1
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- film
- coating composition
- siliceous
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- absorption
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- 239000011574 phosphorus Substances 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000233 poly(alkylene oxides) Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000120 polyethyl acrylate Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- SJMYWORNLPSJQO-UHFFFAOYSA-N tert-butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(C)(C)C SJMYWORNLPSJQO-UHFFFAOYSA-N 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 125000005628 tolylene group Chemical group 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- PZJJKWKADRNWSW-UHFFFAOYSA-N trimethoxysilicon Chemical group CO[Si](OC)OC PZJJKWKADRNWSW-UHFFFAOYSA-N 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- QJMMCGKXBZVAEI-UHFFFAOYSA-N tris(trimethylsilyl) phosphate Chemical compound C[Si](C)(C)OP(=O)(O[Si](C)(C)C)O[Si](C)(C)C QJMMCGKXBZVAEI-UHFFFAOYSA-N 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
-
- 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
-
- 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
-
- 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
- H01L21/02219—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 nitrogen
- H01L21/02222—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 nitrogen the compound being a silazane
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/312—Organic layers, e.g. photoresist
- H01L21/3121—Layers comprising organo-silicon compounds
- H01L21/3125—Layers comprising organo-silicon compounds layers comprising silazane compounds
-
- 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 coating composition and a low dielectric siliceous material produced using the same.
- the present invention relates to a coating composition. Furthermore, the present invention relates to a method for producing a low dielectric siliceous material using the same, and a low dielectric siliceous material produced using the same. Further, the present invention also relates to a semiconductor device provided with the low dielectric siliceous material thus manufactured. Background art
- an interlayer insulating film existing between wirings is required to have a lower dielectric constant, and a mechanical method capable of withstanding a wiring material removing step by a CMP method.
- a CMP method In addition to the chemicals required for CMP and the chemicals used in the CMP method, it is necessary to remove the photoresist by wet stripping. It is also required to have chemical resistance to various chemicals, such as chemicals for removing residues after asshing.
- IMD interlayer insulating film
- PMD metal film
- an organic siliceous film obtained by firing polyorganosilazane can be considered. Since the organic siliceous film thus obtained has a structure in which an organic group is bonded to the silicon atom of silica, the water repellency of the film itself is high. It is possible to obtain a siliceous film having a suppressed rise and having heat resistance and environmental resistance required as an insulating film for a semiconductor.
- Patent Document 1 JP 2002-75982A
- Patent Document 1 The porous siliceous film described in Patent Document 1 has an effect that a rise in relative dielectric constant over time due to moisture absorption can be suppressed.
- the porous silica film generally has an elastic modulus of 3 GPa or less when the relative dielectric constant is about 2.2, and the film strength is high. It turns out that there is room for improvement in terms of
- the treatment in this humidification step is a treatment for promoting the conversion of alkylsilazane to alkylsilanol, and if the humidification step is omitted in the conventional method, it is difficult to obtain a high quality porous siliceous membrane.
- the addition of this humidification step lowers the efficiency of production and requires capital investment for the addition of a humidification device. Therefore, a method for obtaining a high-quality silica-based film that does not require this humidification step is required. Development was desired. [0009]
- the coating film is treated at a high temperature to form the siliceous film.
- this high temperature treatment was generally performed at 400 ° C or higher.
- the high-temperature processing amount thermal budget
- the thermal budget of about 400 ° C for 1 hour has conventionally been within the allowable range.In recent years, it has been desired to reduce this temperature to 375 ° C, and in some cases, 350 ° C. ing.
- a multilayer wiring structure is formed by using a siliceous film as an interlayer insulating film
- a low density and a low dielectric constant can be realized by forming a large number of fine holes in the siliceous film.
- the stress and heat applied when forming metal wiring and other thin films on the porous film trigger the expansion of the hole, and furthermore, the local force of the hole becomes S leak purse, and the porous film is insulated. It may not function as a film. From such a viewpoint, it has been found that the pore diameter of the pores of the porous membrane is desirably 2 nm or less. However, it has been difficult to form a porous film having pores having a uniform diameter of 2 nm or less by the conventional method.
- the present invention relates to a coating composition characterized by comprising a polyalkylsilazane conjugate, an aceethoxysilane compound, and an organic solvent.
- the siliceous material of the present invention is characterized in that the coating composition is formed by applying the coating composition on a substrate or filling a groove, and then firing.
- a semiconductor device is characterized in that the above-mentioned siliceous material is included as an interlayer insulating film.
- the method for producing a siliceous material according to the present invention is characterized in that the coating composition is heated at a temperature of 350 ° C or less for 1 to 160 minutes.
- the invention's effect [0015]
- the present invention solves a problem in the production of a conventional siliceous material as described above, and provides an excellent mechanical strength that can withstand the latest high integration process such as the damascene method.
- An object of the present invention is to provide a coating composition capable of easily producing a siliceous material having a low dielectric constant and having chemical resistance to various chemicals.
- the present invention makes it possible to omit the humidification step required when forming a siliceous film using a silazane compound, thereby achieving simplification of the production step.
- the present invention can reduce the firing temperature as compared with the conventional method for producing a siliceous film, thereby reducing the thermal budget and reducing the electronic material. In addition to improving the stability of the metal wiring inside, it can also reduce energy consumption and reduce manufacturing costs.
- FIG. 1 is an IR spectrum of a siliceous film of Reference Example 2 using only polymethylsilazane.
- FIG. 2 is an enlarged view of an IR spectrum of a siliceous film using only polymethylsilazane of Reference Example 2.
- the polyalkylsilazane conjugate in the present invention has an alkyl-substituted silazane bond.
- a preferred polyalkylsilazane compound preferably contains a repeating unit represented by the following general formula (1).
- R 1 represents a hydrogen atom or an alkyl group having 13 to 13 carbon atoms, but it is not always possible for all R 1 of the whole compound to be hydrogen at the same time.
- R 2 R 4 is a force independently representing a hydrogen atom or an alkyl group having 1 to 3 carbon atoms. R 2 — R 4 cannot be all hydrogen at the same time.
- p, q, and r are each 0 or 1, and 0 ⁇ p + q + r ⁇ 3.
- R 1 is a methyl group and R 2 —R 4 are present, it is preferable that all of them are hydrogen.
- the polyalkylsilazane compound of the present invention can include any of the following (2) or (3) or both in the structure.
- R ° - R 11 are each independently a hydrogen atom or an alkyl group having a carbon number 1 one 3 Table, but it R 5 and R 6 are hydrogen at the same time Nag R 9 - R Not all 11 can be hydrogen at the same time.
- R 5 and R 6 is a hydrogen atom
- the rest is a methyl group
- R 7 is a hydrogen atom
- R 8 is preferably a hydrogen atom
- all of R 9 and R 11 are preferably S methyl groups.
- a polyalkylsilazane coating composition containing the above general formula (1) and any one of (2) or (3), or (1) all units of (3) It is particularly useful in that it can prevent gelation during storage of the product.
- the number of the repeating units represented by the general formula (1) is 50 mol% or more of the total number of the units represented by the general formulas (1) to (3).
- the repeating unit of the general formula (1) accounts for 50% or more of the total number of the repeating units of the general formulas (1) and (3), problems such as repelling and uneven coating during film formation hardly occur. It is.
- the polysilazane compound according to the present invention preferably has a number average molecular weight of 100 or more in order to improve the coating properties of the coating composition, particularly, the coating properties when applying by a spin coating method.
- the polysilazane conjugate according to the present invention preferably has a number average molecular weight of 50,000 or less in order to control the number of crosslinking groups and suppress gelation of the composition.
- a particularly preferred polyalkylsilazane conjugate comprises a repeating unit of the general formula (1) and at least one unit of the general formula (2) or (3). is there.
- the number average molecular weight of the polyalkylsilazane compound is preferably from 100 to 50,000, more preferably from 1,000 to 20,000.
- polyalkylsilazanes can be used as an alkyltrichlorosilane (R SiCl) in the case of a polyalkylsilazane containing a repeating unit of the general formula (1) in ammonolysis when synthesizing ordinary polysilazane, which is obvious to those skilled in the art.
- R SiCl alkyltrichlorosilane
- the coating composition according to the invention comprises an acetooxysilane conjugate.
- This acetoxysilane conjugate has one to fourteen acetoxy groups bonded to a silicon atom.
- a silicon-containing substituent such as an alkyl group or an alkoxy group may be bonded. If necessary, it may be substituted with another substituent.
- the acetoxysilane conjugate is thermally decomposed at a relatively low temperature, for example, at about 200 ° C. during firing, and the generated acetoxy group cures the polyalkylsilazane compound. It is thought to act like a catalyst to promote the reaction when forming a siliceous film. Therefore, it is considered that the firing temperature at the time of curing can be lowered, and the pore diameter of the micropores in the porous film can be reduced. Furthermore, it is considered that the decomposition product containing the silicon of the ethoxysilane compound remains in the thin film, strengthens the cross-linking structure formed at the time of curing, and increases the film strength.
- Acetoethoxysilane compound if a compound having an alkyl group bonded to silicon is used as the acetoethoxysilane compound, the alkyl group tends to remain in the final porous film, and as a result, the film strength tends to decrease.
- Acetoxysilane compounds should be appropriately selected according to the intended use of the siliceous material.
- a humidification step has been essential as described above.
- the purpose of this humidification step was to convert a part of the polyalkylsilazane into a silanol compound.
- the presence of the acetoxysilane conjugate allows the polyalkylsilazane to be converted into a silanol even without the humidification step. It is converted to lanol in a short time. Therefore, when the coating composition according to the present invention is used, a humidification step is not essential for forming the siliceous material.
- a porous material described later is used, a micro phase separation state between the porous material and the matrix can be realized in a short time.
- a silica component is formed only by a dehydration reaction by heating the alkylsilanol body. Heating It was necessary to heat (pre-beta) at a high temperature of 280 ° C or higher to form a silica component sufficient to control the flowability of the alkylsilanol. At this time, if the porous material is burned off, the alkylsilanol body flows in after that, and pores are not formed.Therefore, a heat-resistant porous material that does not burn off at that temperature becomes indispensable. There was also a problem that materials were limited.
- the microphase separation between the matrix and the porous material has already been almost completed, and the porous material is subsequently subjected to a high-temperature process. In the process of sublimation, the microphase separated state is maintained. Therefore, a porous material that sublimates at a relatively low temperature can be used, and a material having a molecular weight lower than that of a conventionally used porous material can be used.
- acetooxysilane conjugate examples include tetraacetoxysilane, methyltriacetoxylan, ethyltriacetoxylan, ethoxytriacetoxylan, and isoethoxysilane.
- the coating composition according to the present invention is obtained by dissolving or dispersing the above-mentioned polyalkylsilazane conjugate and acetylethoxysilane conjugate, and, if necessary, other additives described later in an organic solvent.
- organic solvents include aromatic hydrocarbon solvents such as benzene, tolylene, xylene, ethylbenzene, getylbenzene, trimethylbenzene, and triethylbenzene; cyclohexane, cyclohexene, decahydrobenzene and the like.
- Alicyclic hydrocarbon solvents such as naphthalene, ethylcyclohexane, methylcyclohexane, p-menthine, dipentene (limonene); ether solvents such as dipropyl ether and dibutenyl ether; ketone solvents such as methyl isobutyl ketone Solvents: ester solvents such as propylene glycol monomethyl ether acetate and the like.
- the coating composition according to the present invention can include a porosifying agent to make the pores formed in the siliceous material after curing more or less uniform.
- a porosifying agent to make the pores formed in the siliceous material after curing more or less uniform.
- the dielectric constant of the siliceous material formed using the coating composition according to the present invention can be further reduced.
- a porous material a polyalkylene oxide, an acrylic polymer, or a metharyl polymer can be used.
- And (mouth) homopolymers and copolymers of acrylates or methacrylates which preferably contain a carboxyl group, a hydroxyl group or a siloxy group in a part of their side groups.
- polymers of acrylate or methacrylic acid containing a carboxyl group or a hydroxyl group allow the porous material to bind to the polyalkylsilazane compound via these groups, and separate the porous material. , Resulting in a composition that remains in microphase separation without macrophase separation.
- a particularly preferable porous material is a siloxy group-containing polyethylene oxide compound or a copolymer containing the same as a monomer unit.
- This is a compound containing polyethylene oxide and further having a group containing a siloxy group (Si_ ⁇ bond) in its structure.
- the siloxy group-containing group include a trimethylsiloxy group, a dimethylbutylsiloxy group, a methionolehydrosiloxy group, a dimethylsiloxy group, a phenylmethylsiloxy group, a diphenylsiloxy group, a methylvinylsiloxy group, and a phenylvinyl group.
- siloxy group-containing polyethylene oxide compound is represented by the following general formula.
- R ′ is an arbitrary substituent such as hydrogen, an alkyl group, an alkoxy group and the like, and R ′ in one molecule may be a mixture of a plurality of types.
- R ′ is a polymerizable group, and can be polymerized with another monomer unit.
- L is a linking group, for example, a single bond, an alkylene group, or the like.
- n and n are numbers representing the degree of polymerization.
- the molecular weight of the siloxy group-containing polyethylene oxide compound used in the present invention is not particularly limited, and the force S is preferably 100 to 10,000, more preferably 350 to 1,000.
- the structure of the polyethylene oxide is not particularly limited, but from the viewpoint of appropriately maintaining the viscosity, the weight of the ethyleneoxy moiety is 30 to 90% based on the weight of the molecule.
- the weight of the siloxy group in the polysiloxy structure is preferably 10 to 40%.
- siloxy group-containing polyethylene oxide compound examples include:
- a material selected from the group consisting of a homopolymer and a copolymer of (meth) acrylic acid ester and having a carboxy group or a hydroxyl group in a part of its side groups is also used as the porous material in the present invention.
- a porous material include acrylate homopolymers, for example, polymethyl acrylate, polyethyl acrylate, and methacrylate.
- Ter homopolymers for example, polymethyl methacrylate, polyethyl methacrylate; copolymers of atalinoleate, for example, poly (methyl acrylate-co-ethyl acrylate); copolymers of methacrylate, for example, poly (Methyl methacrylate-co-methacrylate); Copolymers of acrylates and methacrylates, for example, poly (methyl acrylate-co-ethyl methacrylate) and the like.
- the porosifying material is a copolymer, a random copolymer, a block copolymer, or any other sequence having no restriction on the monomer sequence can be used.
- the monomers constituting the homopolymer and copolymer of the (meth) acrylate include methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, i-butyl methacrylate, t-butyl methacrylate, Forces include, but are not limited to, methyl acrylate, ethyl acrylate, n-butyl acrylate, i-butyl acrylate, t-butyl acrylate, and the like.
- methyl methacrylate and n-butyl methacrylate and n-butyl acrylate and i-butyl acrylate are more preferred from the viewpoint of compatibility with polyalkylsilazane.
- the (meth) acrylic acid ester polymer that can be used as the porous material has a carboxy group and / or a hydroxyl group in at least a part of the side groups contained in at least one of the polymer structures. included.
- This carboxy group and / or hydroxyl group can be contained in advance in the monomers constituting the polymer.
- the monomer having a carboxy group or a hydroxyl group include acrylic acid, methacrylic acid, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxybutyl methacrylate, and the like.
- acrylic acid, methacrylic acid, and 2-hydroxyethyl methacrylate are preferred from the viewpoint of easy reaction with a polyacrylsilazane compound.
- a carboxyl group and / or a hydroxyl group can be introduced later into the side chain of the homopolymer or copolymer.
- a carboxyl group can be introduced into a side chain by at least partially hydrolyzing a polymethacrylate.
- polymer component When two or more polymer components are present, at least one of them may contain a carboxy group and / or a hydroxyl group. Therefore, as a polymer component, one containing neither a hydroxyl group nor a hydroxyl group, for example, a polyacrylate ester and a carboxyl group A mixture containing a boxyl group and / or a hydroxyl group, for example, a mixture with poly (methacrylic acid ester-co-methacrylic acid) may be used.
- the carboxy group and the hydroxyl group contained in the (meth) acrylate polymer that can be used as the porous material form a cross-link with the polyalkylsilazane compound. Since the crosslinking reaction affects the strength and structure of the final film, the amount of carboxy and hydroxyl groups is important.
- the amount of the carboxyl group and the hydroxyl group is preferably at least 0.01 mol%, more preferably at least 0.1 mol%, based on the total number of monomers constituting the polymer component. More preferred. Further, in order to prevent gelation due to excessive crosslinking, the content is preferably 50 mol% or less, more preferably 30 mol% or less.
- the polymer molecules are sublimated, decomposed, or evaporated at an appropriate temperature so as to form a porous film.
- the amount is at least 1,000, more preferably at least 10,000.
- the molecular weight of the polymer is preferably 800,000 or less, more preferably 200,000 or less.
- crotonic acid and isocrotonic acid which are structural isomers of methacrylic acid, are recognized as equivalents of methacrylic acid. Therefore, embodiments using crotonic acid and isocrotonic acid corresponding to the above-mentioned methacrylic acid and esters thereof and esters thereof are also included in the scope of the present invention.
- the coating composition according to the present invention can also contain other additive components as required.
- a component include a viscosity modifier, a crosslinking accelerator, and the like.
- a phosphorus compound for example, tris (trimethylsilyl) phosphate can be contained for the purpose of gettering effect of sodium when used in a semiconductor device.
- the coating composition according to the present invention comprises the above-mentioned polyalkylsilazane conjugate, an acetooxysilane compound, and if necessary, the above-mentioned porous material or other additives. It is dissolved or dispersed in the above-mentioned organic solvent, and the components are reacted to obtain a coating composition.
- the order of dissolving each component in the organic solvent is not particularly limited, but the alkylsilazane ligated product and the acetoxoxysilane compound are mixed in the organic solvent, and the mixture is stirred without force. After that, it is preferable to stir and mix the porous material.
- the temperature at which the alkylsilazane compound or the acetyloxysilane compound is mixed with the organic solvent is preferably 50 to 200 ° C, more preferably 80 to 180 ° C. This temperature varies depending on the type of component used.
- the stirring time is a force depending on the type of the reacting components and the temperature.
- the temperature at which the porous material or other additives is mixed is preferably 30 to 80 ° C. in order to prevent the composition from being gelled by the reaction. At this time, it is more preferable to perform the ultrasonic dispersion treatment for about 5 to 90 minutes because the reaction is accelerated.
- a solution of a polyalkylsilazane compound and a solution of an acetoxysilane compound may be mixed, but the temperature conditions at that time are preferably as described above.
- the blending of each component or the subsequent reaction can be carried out under any atmosphere.However, in order to prevent unnecessary oxygen atoms from being incorporated into the formed cross-linking structure, an inert atmosphere such as nitrogen It is preferable to carry out the compounding and the reaction in an atmosphere.
- the solvent can be replaced after the components are reacted.
- the acetyloxysilane compound in an amount of 5% by weight or more based on the weight of the polyalkylsilazane compound in order to effectively obtain the catalytic action and the effect of increasing the film strength.
- the amount of the acetosilane compound is determined based on the weight of the polyalkylsilazane compound in order to prevent the precipitation of the polyalkylsilazane compound, maintain the compatibility of the composition, and prevent film unevenness when forming a film. It is preferable to use it at 40% by weight or less.
- the amount of the porous material according to the present invention when used, is preferably 5% by weight or more based on the weight of the polyalkylsilazane compound in order to effectively realize the porousness of the film. , More preferably at least 10% by weight, particularly preferably at least 20% by weight. On the other hand, in order to prevent a decrease in film strength due to generation of voids or cracks, it is preferable to use the polyalkylsilazane compound in an amount of preferably 50% by weight or less based on the weight of the polyalkylsilazane compound. [0056] The content of each of the above components varies depending on the intended use of the coating composition.
- the solid content is not less than 5% by weight.
- the content is preferably 50% by weight or less. That is, the solid content is generally preferably 5 to 50% by weight, more preferably 10 to 30% by weight, based on the whole coating composition.
- a generally preferable film thickness for example, 2000 8000 A can be obtained.
- the coating composition according to the present invention is applied onto a substrate or filled in a mold or groove, and then dried as necessary to remove excess organic solvent, and then calcined to obtain a siliceous material. be able to.
- the siliceous material according to the present invention is applied to an electronic component such as a semiconductor device, usually, the coating composition applied on the substrate is baked into a siliceous material, so that the silica material is directly formed on the semiconductor device. It is common to form porous materials
- a conventionally known method for example, a spin coating method, a dip method, a spray method, a transfer method and the like can be mentioned.
- the firing of the coating film formed on the substrate surface is performed in various atmospheres.
- the atmosphere in this case includes an atmosphere containing almost no water vapor such as dry air, dry nitrogen, and dry helium, and an atmosphere containing water vapor such as air, humidified atmosphere, and humidified nitrogen.
- the calcination temperature can be lower than the calcination temperature generally performed by the action of the acetoxysilane compound contained in the coating composition according to the present invention, and is generally 380 ° C or less, more preferably 350 ° C or less, At the temperature of On the other hand, the firing temperature is preferably 250 ° C. or higher, more preferably 300 ° C. or higher, in order to sufficiently perform firing in a short time.
- the sintering time varies depending on the sintering temperature and the components, but is generally one minute to one hour.
- the humidification step which was essential in the conventional method for forming a siliceous material using an alkylsilazane compound, can be omitted when the coating composition of the present invention is used, thereby simplifying the step. , Or reduction of manufacturing cost.
- the humidification step can be combined if necessary.
- the siliceous material according to the invention When a humidification process is combined with the manufacturing method, after a coating film is formed on the substrate surface, the film is pre-heated in an atmosphere containing water vapor, and then briefly (for example, 3 to 30 minutes) in a humid atmosphere. Alternatively, it is preferable to leave in an air atmosphere for a long time (for example, 24 hours), and then heat and bake in a dry atmosphere.
- the water vapor content in the water vapor-containing atmosphere is at least 0.1% by volume, preferably at least 1% by volume.
- examples of such an atmosphere include air, humidified air, and humidified nitrogen gas.
- the water vapor content in a dry atmosphere is 0.5% by volume or less, preferably 0.05% by volume or less.
- examples of the dry atmosphere include dry air, nitrogen gas, argon gas, and helium gas.
- the preheating temperature is generally 50-300 ° C.
- the SiN bonds among the bonds of SiH, SiR (R: hydrocarbon group) and SiN in the polyalkylsilazane are oxidized and converted into SiO bonds, and the unoxidized SiH and SiR bonds Is formed.
- the SiO bond formed by selectively oxidizing the SiN bond and the unoxidized SiH and SiR bonds can be present.
- a siliceous film can be obtained.
- the dielectric constant of a siliceous film decreases as its film density decreases, but when the film density decreases, water, which is a high-dielectric substance, is adsorbed. If left in the air, the dielectric constant of the film may increase.
- the silica material according to the present invention has a great advantage that the dielectric constant of the film hardly increases even when left in the atmosphere containing water vapor. Further, in the siliceous material of the present invention, the density is further reduced due to the decomposition of the acetooxysilane conjugate and the decomposition or evaporation of the decomposed product, and as a result, the relative dielectric constant of the siliceous material is reduced. It will be further reduced. In addition, since the film has a low density, there is an advantage that the internal stress of the film is small and a crack is hardly generated.
- the density is 0.5 to 1.6 g / cm 3 , preferably 0.8 to 1.4 g / cm 3
- the crack limit film thickness is It is at least 1.0 xm, preferably at least 5 zm
- its internal stress is at most 100 MPa, preferably at most 80 MPa.
- SiH or SiR (R represents a hydrocarbon group) bond contained in the siliceous material is used.
- the Si-containing group present in the material is 10 to 100 atomic%, preferably 25 to 75 atomic%, based on the number of S ⁇ atoms contained in the material.
- the content of Si present as SiN bonds is 5 atomic% or less.
- the thickness of the siliceous film obtained after firing varies depending on the use of the substrate surface, but is usually 0.01 to 5 zm, preferably 0.12 m. In particular, when it is used as an interlayer insulating film of a semiconductor, it is preferably 0.12 xm.
- the porous siliceous material according to the present invention has excellent mechanical strength because the pores formed when the porous material is used are extremely fine. Specifically, the porous siliceous material according to the present invention exhibits a remarkably high mechanical strength as a porous siliceous material having an elastic modulus of 3 GPa or more, and in some cases, 5 GPa or more by a nanoindentation method described later. is there.
- the siliceous material according to the present invention has a water-repellent group derived from the polyalkylsilazane compound, which is a matrix component thereof, sufficiently remaining after calcination. The rate hardly rises.
- low density and water repellency are achieved by the binding components (SiH, SiR) of the siliceous material, and when a porous material is used, the film is formed by micropores.
- a porous siliceous material that can stably maintain an extremely low relative dielectric constant of less than 2.5, preferably 2.0 or less, and in some cases about 1.6 can be obtained.
- the siliceous material according to the present invention has a low density as described above, and its crack limit film thickness, that is, the maximum film thickness that can be formed without causing film cracking, is as high as 5 xm or more. It also has the advantage of showing numerical values. In the case of the conventional siliceous film, the crack limit film thickness is about 0.5 to 1.5 zm.
- the siliceous material according to the present invention has a low dielectric constant, a low density, a high water repellency, a high chemical resistance, and a high mechanical strength, compared to the conventional siliceous material. Is the thing Further, it can stably maintain a low dielectric constant, and is particularly preferable to be applied to an interlayer insulating film or an insulating film under a metal film, particularly an interlayer insulating film in a semiconductor device.
- the siliceous material according to the present invention can have a high silicon content. This is due to the formulation of the acetoxylsilane conjugate. Due to such a high silicon content, the siliceous material according to the present invention is characterized by having higher strength than the siliceous material obtained by a conventional method using polyalkylsilazane.
- a stainless steel tank for supplying raw materials was mounted on a stainless steel tank reactor with an internal volume of 5 liters. After the inside of the reactor was replaced with dry nitrogen, 780 g of methyltrichlorosilane was put into the stainless steel for raw material supply, and this was pressure-fed into the reaction tank with nitrogen and introduced. Next, a raw material supply tank containing pyridine was connected to the reactor, and 4 kg of pyridine was similarly pumped and introduced with nitrogen. The pressure of the reactor was adjusted to 1.0 kg / cm 2 , and the temperature of the mixture in the reactor was adjusted to 14 ° C. Ammonia was blown into the reactor with stirring, and when the pressure in the reactor reached 2.0 kg / cm 2 , the supply of ammonia was stopped.
- the reactor pressure was lowered by opening an exhaust line, and then dry nitrogen was blown into the liquid phase for 1 hour to remove excess ammonia.
- the obtained product was subjected to pressure filtration under a dry nitrogen atmosphere using a pressure filter to obtain 3200 ml of a filtrate.
- pyridine was distilled off using an evaporator, about 340 g of polymethylsilazane was obtained.
- the number average molecular weight of the obtained polymethylsilazane was measured by gas chromatography using a chromate form as a developing solution, and was 1800 in terms of polystyrene.
- Infrared absorption scan Bae spectrum (hereinafter, referred to as IR spectrum) was measured, 3350Cm- 1 and 1200cm- 1 NH bonded to based absorption around, 2900Cm- 1 and 1250Cm- 1 of Si- C bond to based absorption, and An absorption based on the Si—N—Si bond of 1020—820 cm— 1 was observed.
- the filtrate was applied to a silicon wafer having a diameter of 10.2 cm (4 inches) and a thickness of 0.5 mm using a spin coater at 1500 rpm for 20 seconds, and further dried at room temperature for 3 minutes.
- the silicon wafer is heated in an air atmosphere (relative humidity of 40% at 23 ° C) at 150 ° C for 3 minutes, then on a hot plate at 250 ° C for 3 minutes, and further in a clean room for 24 hours to absorb moisture ( (23 ° C relative humidity 40%). After standing, it was baked at 350 ° C / 30 minutes in a dry nitrogen atmosphere to obtain a siliceous film.
- the IR spectrum of the obtained siliceous film is as shown in FIG. 1050—1200cm— 1 and 450cm— 1 absorption based on Si—O bond, 1280cm— 1 and 750cm— 1 absorption based on Si_C bond, 2950cm— 1 absorption based on C_H bond, 3350cm_1 And the absorption due to the NH bond at 1200 cm- 1 had been destroyed. And an IR scan Bae Kutonore based, peak division method as shown in FIG.
- the relative dielectric constant was 2.90
- the density was 1.41 g / cm 3
- the internal stress was 50 MPa
- the crack limit film thickness was 3 / m or more.
- the filtrate is 10.2 cm (4 inches) in diameter and 0.5 mm thick It was applied on a silicon wafer at 1500 rpm / 20 seconds using a spin coater, and dried at room temperature for 3 minutes.
- the silicon wafer is heated at 100 ° C for 3 minutes in an air atmosphere (relative humidity 40% at 23 ° C), and then for 3 minutes on a 190 ° C hot plate, and then heated at 350 ° C / 30 in a dry nitrogen atmosphere. After baking for a minute, a siliceous film was obtained.
- the IR spectrum of the obtained siliceous film shows absorption near 1050 lSOOcm- 1 and absorption based on Si_ ⁇ bond of 450cm, absorption based on Si_C bond of 1280cm- 1 and 780cm- 1 and C of SSSOcm- 1 .
- the relative dielectric constant was 2.81
- the density was 1.39 g / cm 3
- the internal stress was 64 MPa
- the critical crack thickness was 2 / m or more.
- the silicon wafer is heated at 100 ° C for 3 minutes in an air atmosphere (relative humidity of 40% at 23 ° C), then on a hot plate at 190 ° C for 3 minutes, and then at 350 ° C in a dry nitrogen atmosphere. / 30 minutes baking to obtain a siliceous film.
- the relative dielectric constant was 2.24
- the density was 1.29 g / cm 3
- the internal stress was 51 MPa
- the critical crack thickness was 3 / m or more.
- the relative permittivity was measured again after the obtained film was left in the air at a temperature of 23 ° C and a relative humidity of 50% for one week, and it was found that the relative permittivity was 2.27. There was no level.
- Example 3 In the same manner as in Example 2, a siliceous film was obtained. When the IR spectrum of the obtained film was measured, the position of the peak was exactly the same as in the example.
- the relative dielectric constant was 2.30
- the density was 1.21 g / cm 3
- the internal stress was 46 MPa
- the crack limit film thickness was 3 zm or more.
- the relative permittivity was measured again after the obtained film was left in the air at a temperature of 23 ° C and a relative humidity of 50% for one week, and it was found that the relative permittivity was 2.22. There was no level.
- the elastic modulus by nanoindentation of this film was 5. lGPa. Further, when the pore size of the siliceous membrane was measured by the X-ray diffuse scattering method, the average pore size was 19A.
- a siliceous film was obtained in the same manner as in Example 2, except that polyethylene glycol methyl ether having a number average molecular weight of 550 was used instead of the hydroxy (polyethyleneoxy) propyl-terminated silicone.
- polyethylene glycol methyl ether having a number average molecular weight of 550 was used instead of the hydroxy (polyethyleneoxy) propyl-terminated silicone.
- IR spectrum of the film 1030-1200Cm ⁇ around, and 450Cm- 1 of Si- O bond to based absorption 1270Cm- 1 and 780Cm- 1 of Si _C based binding absorption of 2980Cm- 1
- Absorptions based on C—H bonds were observed, and absorptions based on N—H bonds at 3350 cm_1 and 1200 cm ⁇ 1 , absorption based on polyethylene glycol methyl ether, and absorption based on tetraacetoxysilane had been destroyed.
- the relative dielectric constant was 2.35
- the density was 1.30 g / cm 3
- the internal stress was 59 MPa
- the crack limit film thickness was 3 zm or more.
- the relative permittivity was measured again after the obtained film was left in the air at a temperature of 23 ° C and a relative humidity of 50% for one week, and it was found that the relative permittivity was 2.38. There was no level.
- Example 5 The same procedures as in Example 1 were carried out except that the amount of tetraacetoxysilane added was changed to 1.65 g, and the amount of hydroxy (polyethyleneoxy) propyl-terminated silicone was changed to 1.65 g. Thus, a siliceous film was obtained.
- the relative dielectric constant was 2.52
- the density was 1.37 g / cm 3
- the internal stress was 62 MPa
- the crack limit film thickness was 3 zm or more.
- the modulus of elasticity of this film by the nanoindentation method was 5.5 GPa.
- a siliceous film was obtained in the same manner as in Example 1, except that the temperature for firing the composition was changed from 350 ° C to 400 ° C.
- the peak position of the IR spectrum of the obtained film is almost the same as that of the siliceous film obtained in Example 1, and the area of the absorption (P1) based on the Si—O bond near 1050 l SOOcnT 1
- P1 area area of absorption (P2) based on the Si—C bond of 1280 cm- 1
- the relative dielectric constant was 2.21
- the density was 1.31 g / cm 3
- the internal stress was 54 MPa
- the critical crack thickness was 3 zm or more.
- the modulus of elasticity of this film by the nanoindentation method was 5. OGPa. Further, when the pore size of the siliceous membrane was measured by the X-ray diffuse scattering method, the average pore size was 18A.
- Example 1 A comparison between this example and Example 1 shows that the use of the composition according to the present invention makes it possible to achieve a temperature of 400 ° C or higher. It is possible to obtain a siliceous film with physical properties that remain almost the same even if the firing temperature used in the above procedure is lowered to 350 ° C. That is, by lowering the temperature at which the coating composition is heated, the thermal budget can be reduced, and the same performance as that obtained by the conventional method can be achieved. Furthermore, energy consumption can be suppressed and manufacturing costs can be reduced.
- the mixture was concentrated using an evaporator, and about 10 g of PGMEA as a solvent was evaporated to obtain a PGMEA solution having a solid content of about 15%. Subsequently, the solution was filtered with a PTFE syringe filter (manufactured by Advantech) having a filtration accuracy of 0.2 micron. The filtrate was applied on a silicon wafer of 10.2 cm (4 inches) in diameter and 0.5 mm in thickness using a spin coater at 1500 rpm / 20 seconds, and in a clean room (23 ° C (Humidification step).
- the silicon wafer is heated at 100 ° C for 3 minutes in an air atmosphere (relative humidity of 40% at 23 ° C), then on a hot plate at 190 ° C for 3 minutes, and then at 350 ° C in a dry nitrogen atmosphere. / 30 minutes baking to obtain a siliceous film.
- the relative dielectric constant was 2.64
- the density was 1.15 g / cm 3
- the internal stress was 38 MPa
- the critical crack thickness was 3 / m or more.
- the modulus of elasticity of this film by the nanoindentation method was 4.2 GPa.
- the silicon wafer was heated at 100 ° C for 3 minutes in an air atmosphere (relative humidity 40% at 23 ° C), then for 3 minutes on a hot plate at 190 ° C, and then heated at 350 ° C / It was baked for 30 minutes to obtain a siliceous film.
- Pyrex (registered trademark: Dow's Kojung Co.) glass plate (thickness lmm, size 50mm X 50mm) is thoroughly washed with a neutral detergent, dilute NaOH aqueous solution and dilute HHO aqueous solution in this order, and dried
- An aluminum film is formed on the entire surface of the glass plate by a vacuum evaporation method (thickness: 0.2 / m). After applying the sample composition solution to this glass plate by spin coating to form a film, the four corners of the glass plate are rubbed with a cotton swab to remove signals (3 mm X 3 mm). Subsequently, it is converted into a siliceous film according to the method of each example. The obtained siliceous film is covered with a stainless steel mask, and an aluminum film is formed by vacuum evaporation.
- the number of patterns shall be 18 squares of 2 mm X 2 mm with a thickness of 2 ⁇ .
- the capacitance is measured at 100 kHz using a 4192ALF impedance analyzer (Yokogawa 'Curet' Packard).
- an M-44 type spectroscopic ellipsometer manufactured by JA Woolam is used for measuring the film thickness.
- the relative permittivity is the average of the values calculated by the following formula for all 18 patterns.
- a silicon wafer with a diameter of 10.16 cm (4 inches) and a thickness of 0.5 mm is weighed with an electronic balance.
- the sample composition solution is applied by spin coating to form a film, converted into a siliceous film according to the method of each example, and the weight of the silicon wafer with the film is measured again with an electronic balance.
- the film weight is the difference between the weight of the wafer before and after the film formation.
- the film thickness is measured with an M-44 spectroscopic ellipsometer (A. Woolam).
- the sled of a silicon wafer with a diameter of 20 cm and 32 cm (8 inches) and a thickness of lmm is input to a FLX-2320 laser-internal stress measuring instrument (Tencor). Further, the sample composition solution was applied to the silicon wafer by spin coating to form a film, converted into a siliceous film according to the method of each example, and returned to room temperature (23 ° C.). Measure the internal stress with an internal stress meter. The film thickness is measured with an M-44 type spectroscopic ellipsometer (IA Woolam).
- a sample composition solution is applied to a silicon wafer having a diameter of 10.16 cm (4 inches) and a thickness of 0.5 mm by a spin coating method to form a film, which is converted into a siliceous film according to the method of each example. Adjust the solid content concentration of the sample composition solution or the number of revolutions of the spin coater at the time of coating to prepare a sample whose film thickness is varied from about 0.5 zm to about 5 zm. The film surface after baking is observed under a microscope (120x), and the presence or absence of cracks in each sample is examined. Let the film thickness be the crack limit film thickness.
- a sample composition solution is applied to a silicon wafer having a diameter of 20.32 cm (8 inches) and a thickness of lmm by spin coating to form a film, which is converted into a siliceous film according to the method of each example.
- the elastic modulus is measured using a mechanical property evaluation system for thin films (Nano Indenter DCM manufactured by MTS Systems, USA).
- a sample composition solution is applied to a silicon wafer having a diameter of 20.32 cm (8 inches) and a thickness of lmm by spin coating to form a film, which is converted into a siliceous film according to the method of each example.
- the pore size of the obtained siliceous film is measured by an X-ray diffuse scattering method using a multifunctional X-ray diffractometer (manufactured by Rigaku Denki Co., Ltd.) for evaluating the surface structure of ATX-G.
- the present invention is to provide a siliceous material having a stable balance between low dielectric constant, mechanical strength capable of withstanding the latest fine wiring process, and various chemical resistances in a well-balanced manner.
- the siliceous material according to the present invention as an interlayer insulating film or an insulating film below a metal film of a semiconductor device, it is possible to further increase the degree of integration and multilayering of an integrated circuit.
- the siliceous material according to the present invention can be used for both an interlayer insulating film and an insulating film below a metal film.
- a porous material is included in the coating composition according to the present invention. In this case, the number of micropores formed in the obtained siliceous material is increased and the dielectric constant is further lowered, and the siliceous material is particularly preferable for the interlayer insulating film.
- a siliceous film can be formed on a solid surface of various materials such as metal, ceramics, and wood.
- a metal substrate (silicon, sus, tantalum, iron, copper, zinc, brass, aluminum, etc.) having a siliceous film formed on the surface thereof, or a ceramic substrate having a siliceous film formed on the surface is provided.
- metal oxides such as silica, alumina, magnesium oxide, titanium oxide, zinc oxide, and tantalum oxide
- metal nitrides such as silicon nitride, boron nitride, and titanium nitride, and silicon carbide.
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Abstract
Description
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CN2004800229744A CN1836017B (zh) | 2003-08-12 | 2004-08-04 | 涂料组合物和通过使用该涂料组合物制得的低介电硅质材料 |
US10/565,429 US7754003B2 (en) | 2003-08-12 | 2004-08-04 | Coating composition and low dielectric siliceous material produced by using same |
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JP5305237B2 (ja) * | 2009-04-23 | 2013-10-02 | ダイソー株式会社 | 有機−無機ハイブリッドシリカゲルの製造方法 |
JP5405437B2 (ja) | 2010-11-05 | 2014-02-05 | AzエレクトロニックマテリアルズIp株式会社 | アイソレーション構造の形成方法 |
US8541301B2 (en) * | 2011-07-12 | 2013-09-24 | International Business Machines Corporation | Reduction of pore fill material dewetting |
US8927430B2 (en) | 2011-07-12 | 2015-01-06 | International Business Machines Corporation | Overburden removal for pore fill integration approach |
US8895379B2 (en) | 2012-01-06 | 2014-11-25 | International Business Machines Corporation | Integrated circuit having raised source drains devices with reduced silicide contact resistance and methods to fabricate same |
WO2014014542A2 (en) | 2012-04-27 | 2014-01-23 | Burning Bush Group | High performance silicon based coating compositions |
US10138381B2 (en) | 2012-05-10 | 2018-11-27 | Burning Bush Group, Llc | High performance silicon based thermal coating compositions |
CN104812543B (zh) | 2012-07-03 | 2017-06-13 | 伯宁布什集团有限公司 | 硅基高性能涂料组合物 |
CN103950940B (zh) * | 2014-04-10 | 2015-11-18 | 周雨 | 低介电常数硅微粉的制备方法 |
KR101833800B1 (ko) * | 2014-12-19 | 2018-03-02 | 삼성에스디아이 주식회사 | 실리카계 막 형성용 조성물, 실리카계 막의 제조방법 및 상기 실리카계 막을 포함하는 전자 소자 |
KR101940171B1 (ko) * | 2015-10-29 | 2019-01-18 | 삼성에스디아이 주식회사 | 실리카 막의 제조방법, 실리카 막 및 전자소자 |
US10468244B2 (en) * | 2016-08-30 | 2019-11-05 | Versum Materials Us, Llc | Precursors and flowable CVD methods for making low-K films to fill surface features |
US11017998B2 (en) | 2016-08-30 | 2021-05-25 | Versum Materials Us, Llc | Precursors and flowable CVD methods for making low-K films to fill surface features |
CN107144483B (zh) * | 2017-05-11 | 2023-10-03 | 兰州大学 | 一种基于液氮制冷的纳米压痕多场测试系统 |
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JPH01138107A (ja) * | 1987-08-13 | 1989-05-31 | Sekiyu Sangyo Katsuseika Center | 改質ポリシラザン、その製造方法及びその用途 |
JPH0851271A (ja) * | 1994-04-01 | 1996-02-20 | Dow Corning Corp | エレクトロニクス基材上に保護被覆を形成する方法 |
JPH09107171A (ja) * | 1995-06-16 | 1997-04-22 | Dow Corning Corp | コーティング形成方法 |
JP2002075982A (ja) * | 2000-08-29 | 2002-03-15 | Clariant (Japan) Kk | 低誘電率多孔質シリカ質膜、半導体装置およびコーティング組成物 |
Family Cites Families (5)
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DE3400860A1 (de) * | 1984-01-12 | 1985-07-18 | Henkel KGaA, 4000 Düsseldorf | Glasprimer |
US4975512A (en) | 1987-08-13 | 1990-12-04 | Petroleum Energy Center | Reformed polysilazane and method of producing same |
JPH0766287A (ja) * | 1993-08-23 | 1995-03-10 | Matsushita Electric Ind Co Ltd | 半導体装置及びその製造方法 |
US5436084A (en) * | 1994-04-05 | 1995-07-25 | Dow Corning Corporation | Electronic coatings using filled borosilazanes |
KR100600631B1 (ko) * | 1998-04-24 | 2006-07-13 | 쇼쿠바이가세고교 가부시키가이샤 | 저유전율 실리카계 피막 형성용 도포액 및 저유전율피막으로 도포된 기재 |
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2003
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2004
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- 2004-08-04 KR KR1020067002892A patent/KR101097713B1/ko active IP Right Grant
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH01138107A (ja) * | 1987-08-13 | 1989-05-31 | Sekiyu Sangyo Katsuseika Center | 改質ポリシラザン、その製造方法及びその用途 |
JPH0851271A (ja) * | 1994-04-01 | 1996-02-20 | Dow Corning Corp | エレクトロニクス基材上に保護被覆を形成する方法 |
JPH09107171A (ja) * | 1995-06-16 | 1997-04-22 | Dow Corning Corp | コーティング形成方法 |
JP2002075982A (ja) * | 2000-08-29 | 2002-03-15 | Clariant (Japan) Kk | 低誘電率多孔質シリカ質膜、半導体装置およびコーティング組成物 |
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KR101097713B1 (ko) | 2011-12-23 |
TW200523332A (en) | 2005-07-16 |
KR20060066087A (ko) | 2006-06-15 |
US20060246303A1 (en) | 2006-11-02 |
JP4588304B2 (ja) | 2010-12-01 |
JP2006316077A (ja) | 2006-11-24 |
EP1661960A4 (en) | 2011-05-11 |
CN1836017B (zh) | 2011-11-02 |
US7754003B2 (en) | 2010-07-13 |
TWI332520B (en) | 2010-11-01 |
CN1836017A (zh) | 2006-09-20 |
EP1661960A1 (en) | 2006-05-31 |
EP1661960B1 (en) | 2012-07-25 |
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