WO2017086361A1 - 半導体用膜組成物、半導体用膜組成物の製造方法、半導体用部材の製造方法、半導体用工程材の製造方法及び半導体装置 - Google Patents
半導体用膜組成物、半導体用膜組成物の製造方法、半導体用部材の製造方法、半導体用工程材の製造方法及び半導体装置 Download PDFInfo
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- WO2017086361A1 WO2017086361A1 PCT/JP2016/084009 JP2016084009W WO2017086361A1 WO 2017086361 A1 WO2017086361 A1 WO 2017086361A1 JP 2016084009 W JP2016084009 W JP 2016084009W WO 2017086361 A1 WO2017086361 A1 WO 2017086361A1
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- 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
- C09D177/00—Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Coating compositions based on derivatives of such polymers
- C09D177/06—Polyamides derived from polyamines and polycarboxylic acids
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/42—Polyamides containing atoms other than carbon, hydrogen, oxygen, and nitrogen
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/02—Polyamines
- C08G73/0246—Polyamines containing other atoms than carbon, hydrogen, nitrogen or oxygen in the main chain
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- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/02—Polyamines
- C08G73/028—Polyamidoamines
- C08G73/0293—Quaternisation of polyamidoamines
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- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1003—Preparatory processes
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C08L101/025—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing nitrogen atoms
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
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- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
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- 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
- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- H10P14/3402—
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- H10P14/6342—
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- H10P14/6516—
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/28—Nitrogen-containing compounds
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- 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
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
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- 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
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/092—Polycarboxylic acids
Definitions
- the present invention relates to a semiconductor film composition, a semiconductor film composition manufacturing method, a semiconductor member manufacturing method, a semiconductor process material manufacturing method, and a semiconductor device.
- a composition containing a polymer is applied to a member.
- a method for producing a composite to be applied to the surfaces of A and member B is known (see, for example, Patent Document 1).
- Patent Document 1 describes that the composite member provided with the composition is washed with a rinsing solution containing a polyvalent carboxylic acid.
- Patent Document 1 a polymer such as polyethyleneimine is applied to a member, and a rinsing liquid containing a polyvalent carboxylic acid is applied thereon, followed by crosslinking by a heating reaction, resulting in a large number of steps.
- a composition in which a polymer such as polyethyleneimine and a polyvalent carboxylic acid are mixed and applied to the member, the polymer and the polyvalent carboxylic acid are aggregated and the composition becomes cloudy.
- a member there is a problem that the formation of aggregates, pits, etc. causes large irregularities and results in a film with insufficient smoothness.
- One embodiment of the present invention has been made in view of the above problems, and provides a film composition for semiconductor, a method for manufacturing the same, and a film composition for semiconductor that can provide a film with less aggregates and pits and high smoothness. It is an object of the present invention to provide a method for producing a semiconductor member used, a method for producing a semiconductor process material using the semiconductor film composition, and a semiconductor device including a highly smooth reactant.
- a film composition for a semiconductor comprising an OH group and a weight average molecular weight of 200 or more and 600 or less, and a polar solvent (D).
- the said crosslinking agent (B) is a film
- the cross-linking agent (B) in the three or more —C ( ⁇ O) OX groups, at least one X is an alkyl group having 1 to 6 carbon atoms, 4> The film composition for a semiconductor according to any one of 4>.
- ⁇ 6> At least one selected from the group consisting of an acid (C-1) having a weight average molecular weight of 46 to 195 having a carboxy group and a base (C-2) having a weight average molecular weight of 17 to 120 having a nitrogen atom.
- ⁇ 7> includes at least one selected from the group consisting of an aliphatic amine having a weight average molecular weight of 10,000 to 400,000 and an amine compound having a ring structure in the molecule and a weight average molecular weight of 90 to 600, ⁇ 1> to The film composition for a semiconductor according to any one of ⁇ 6>.
- ⁇ 8> The semiconductor film composition according to any one of ⁇ 1> to ⁇ 7>, which is used as a filling material for a recess formed in a substrate.
- ⁇ 9> The film composition for a semiconductor according to any one of ⁇ 1> to ⁇ 7>, which is used in a multilayer resist method.
- ⁇ 10> A method for producing the semiconductor film composition according to any one of ⁇ 1> to ⁇ 9>, wherein the compound (A) and the crosslinking agent (B) are mixed.
- membrane composition for semiconductors including a mixing process.
- the mixing step is a step of mixing a mixture of the acid (C-1) having a weight average molecular weight of 46 or more and 195 or less having a carboxy group with the compound (A) and the crosslinking agent (B).
- the mixing step is a step of mixing a mixture of a base (C-2) having a nitrogen atom-containing weight average molecular weight of 17 or more and 120 or less and the crosslinking agent (B) with the compound (A).
- the manufacturing method of the member for semiconductors which has a process and the heating process which heats the said board
- membrane composition for semiconductors was provided on the temperature of 250 to 425 degreeC conditions.
- Compound (A) having a weight average molecular weight of 130 to 10,000 and having a substrate, a cationic functional group containing at least one of a primary nitrogen atom and a secondary nitrogen atom, and a Si—O bond, and a molecule 3 or more —C ( ⁇ O) OX groups (wherein X is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms) and 3 or more —C ( ⁇ O) OX groups And a reaction product of a crosslinking agent (B) having one or more and six or less —C ( ⁇ O) OH groups and a weight average molecular weight of 200 or more and 600 or less.
- One embodiment of the present invention is a film composition for a semiconductor in which a highly smooth film with few aggregates and pits is obtained, a method for manufacturing the same, a method for manufacturing a semiconductor member using the film composition for a semiconductor, and the semiconductor
- the manufacturing method of the process material for semiconductors using the film composition for semiconductors, and a semiconductor device provided with the reaction product with high smoothness can be provided.
- a numerical range expressed using “to” or “ ⁇ ” means a range including numerical values described before and after “to” or “ ⁇ ” as a lower limit and an upper limit.
- composition for Semiconductor
- composition includes a cationic functional group containing at least one of a primary nitrogen atom and a secondary nitrogen atom and a Si—O bond.
- a compound (A) having a —C ( ⁇ O) OX group (X is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms) in the molecule, and having 3 or more Among the —C ( ⁇ O) OX groups, one or more and six or less are —C ( ⁇ O) OH groups, and the weight average molecular weight is 200 or more and 600 or less, and a polar solvent (D ) And.
- the semiconductor film composition according to the present embodiment specifically, by forming a film by applying the semiconductor film composition to a member, a film having few aggregates and pits and high smoothness can be obtained. can get. Further, by using the semiconductor film composition according to the present embodiment, a film having higher smoothness can be obtained more easily than the technique of Patent Document 1 (International Publication No. 2014/156616) described above.
- a film having small unevenness and good smoothness can be formed.
- the film composition for semiconductor according to the present embodiment on a smooth substrate such as a silicon substrate.
- the difference between the maximum value and the minimum value of the film thickness is 25% or less of the average film thickness within a 500 nm wide field of view with a scanning electron microscope (SEM) magnification of 200,000.
- SEM scanning electron microscope
- the film composition for semiconductor containing the compound (A) and the crosslinking agent (B) is applied to the member to form a film, thereby improving smoothness and uniform composition in the film thickness direction. Can increase the sex.
- the semiconductor film composition according to this embodiment it is possible to form a film having excellent smoothness and uniformity of composition in the film thickness direction, for example, a film thickness of 0.5 nm or more and 5 ⁇ m or less. Further, a film having excellent smoothness can be formed on the surface of a large-diameter silicon substrate. For example, when the film thickness is 5 nm or more and 150 nm, the film thickness variation between the center and the edge of the 300 mm ⁇ silicon substrate is ⁇ It can be 15% or less, preferably ⁇ 10% or less.
- the semiconductor film composition according to this embodiment is a composition for forming a film for a semiconductor device.
- a gap fill material (embedded planarizing film) filled in a recess formed in a substrate.
- a barrier material provided between a metal and a low dielectric constant material such as an insulating material (embedded insulating film) filled in a recess formed on a substrate and a porous material, and having insulating properties, adhesion properties, pore sealing properties, etc. (Barrier film), an insulating material provided between the metal and the silicon substrate or between the metal and the insulating film on the via sidewall of the through silicon via substrate (insulating film for through silicon via) It is used for forming.
- the filling material (embedded planarization film) for the recesses formed in the substrate may be used for complex processing of the substrate.
- a multilayer resist method as one of methods for transferring a lithography pattern to a substrate using a hard mask.
- This multilayer resist method uses a photoresist film, that is, an upper resist film, and a lower film having different etching selectivity, that is, a lower resist film.
- a lower resist film containing silicon is interposed between an upper resist film and a substrate to be processed, a pattern is formed on the upper resist film, and then the upper resist pattern is used as an etching mask to form a lower resist film.
- the pattern is transferred, and further the pattern is transferred to the substrate to be processed using the lower resist pattern as an etching mask.
- composition of the lower resist film used in such a multilayer resist method there are a silicon-containing inorganic film by CVD, a SiO 2 film, a SiON film and the like.
- a silicon-containing inorganic film by CVD As the miniaturization of semiconductor devices further progresses, not only the line width of the pattern becomes finer, but also the thickness of the upper resist film becomes thinner to prevent the pattern from falling down, which is required for the lower resist film.
- improvements in embedding property and etching selectivity in a finer pattern than before have been demanded.
- the multilayer resist method for example, dry etching such as plasma etching is widely used when transferring an upper resist pattern to a lower resist film or transferring a lower resist pattern to a substrate to be processed.
- Most of the resist films put into practical use by the conventional multilayer resist method are organic films, silicon-containing inorganic films by CVD as described above, and the like.
- the resist film may be required to have heat resistance (for example, resistance to heat treatment that may be performed after the resist film is formed).
- a film other than a resist film for example, a buried insulating film (shallow trench type element isolation film (STI film), premetal). Insulating films (PMD films), wiring interlayer insulating films (IMD films) and the like are also required.
- a buried insulating film shallow trench type element isolation film (STI film), premetal.
- Insulating films (PMD films), wiring interlayer insulating films (IMD films) and the like are also required.
- the film composition for a semiconductor according to this embodiment is excellent in embedding property, etching selectivity, and heat resistance, it can be used for manufacturing a resist film used in a multilayer resist method and the above-described films other than the resist film. .
- the semiconductor according to the present embodiment is used for the purpose of forming a reversal resist formed by coating on a photoresist after exposure and replacing it with a photoresist in a photosensitive or non-photosensitive portion.
- a film composition may be used.
- the film composition for a semiconductor according to this embodiment includes a compound (A) having a cationic functional group containing at least one of a primary nitrogen atom and a secondary nitrogen atom and a Si—O bond.
- Compound (A) is a compound having a cationic functional group containing at least one of a primary nitrogen atom and a secondary nitrogen atom and a Si—O bond, and having a weight average molecular weight of 130 or more and 10,000 or less. Also good.
- Compound (A) is a compound having a cationic functional group containing at least one of a primary nitrogen atom and a secondary nitrogen atom.
- the cationic functional group is not particularly limited as long as it is a functional group that can be positively charged and contains at least one of a primary nitrogen atom and a secondary nitrogen atom.
- the compound (A) may contain a tertiary nitrogen atom in addition to the primary nitrogen atom and the secondary nitrogen atom.
- the “primary nitrogen atom” includes a nitrogen atom bonded to only two hydrogen atoms and one atom other than a hydrogen atom (for example, a primary amino group (—NH 2 group)). Nitrogen atom) or a nitrogen atom (cation) bonded to only three hydrogen atoms and one atom other than hydrogen atoms.
- the “secondary nitrogen atom” means a nitrogen atom bonded to only one hydrogen atom and two atoms other than hydrogen atoms (that is, a nitrogen atom contained in a functional group represented by the following formula (a)) Or a nitrogen atom (cation) bonded to only two hydrogen atoms and two atoms other than hydrogen atoms.
- the “tertiary nitrogen atom” is a nitrogen atom bonded to only three atoms other than a hydrogen atom (that is, a nitrogen atom which is a functional group represented by the following formula (b)) or a hydrogen atom It refers to a nitrogen atom (cation) bonded to only one atom and three atoms other than hydrogen atoms.
- the functional group represented by the formula (a) may be a functional group constituting a part of a secondary amino group (—NHR a group; where R a represents an alkyl group). Further, it may be a divalent linking group contained in the polymer skeleton.
- the functional group represented by the formula (b) (that is, tertiary nitrogen atom) is a tertiary amino group (—NR b R c group; where R b and R c are each independently alkyl A functional group constituting a part of the group) or a trivalent linking group contained in the skeleton of the polymer.
- the weight average molecular weight of the compound (A) is preferably from 130 to 10,000, more preferably from 130 to 5,000, still more preferably from 130 to 2,000.
- a weight average molecular weight points out the weight average molecular weight of polyethylene glycol conversion measured by GPC (Gel Permeation Chromatography) method. Specifically, the weight average molecular weight was measured using an analytical solution Shodex DET RI-101 and two types of analytical columns (TSKgel G6000PWXL-CP and TSKgel G3000PWXL CP) is used to detect the refractive index at a flow rate of 1.0 mL / min, and polyethylene glycol / polyethylene oxide is used as a standard product and calculated with analysis software (Waters Empower3).
- GPC Gel Permeation Chromatography
- the compound (A) may further have an anionic functional group, a nonionic functional group, or the like, if necessary.
- the nonionic functional group may be a hydrogen bond accepting group or a hydrogen bond donating group.
- Examples of the nonionic functional group include a hydroxy group, a carbonyl group, an ether group (—O—), and the like.
- the anionic functional group is not particularly limited as long as it is a functional group that can be negatively charged. Examples of the anionic functional group include a carboxylic acid group, a sulfonic acid group, and a sulfuric acid group.
- Examples of the compound having a Si—O bond and an amino group include siloxane diamine, a silane coupling agent having an amino group, and a siloxane polymer.
- Examples of the silane coupling agent having an amino group include compounds represented by the following formula (A-3).
- R 1 represents an optionally substituted alkyl group having 1 to 4 carbon atoms.
- R 2 and R 3 each independently represents an alkylene group having 1 to 12 carbon atoms, an ether group or a carbonyl group which may be substituted (a skeleton may contain a carbonyl group, an ether group or the like).
- R 4 and R 5 each independently represents an optionally substituted alkylene group having 1 to 4 carbon atoms or a single bond.
- Ar represents a divalent or trivalent aromatic ring.
- X 1 represents hydrogen or an optionally substituted alkyl group having 1 to 5 carbon atoms.
- X 2 represents hydrogen, a cycloalkyl group, a heterocyclic group, an aryl group, or an alkyl group having 1 to 5 carbon atoms which may be substituted (a skeleton may include a carbonyl group, an ether group, or the like).
- a plurality of R 1 , R 2 , R 3 , R 4 , R 5 , and X 1 may be the same or different.
- the substituent for the alkyl group and alkylene group in R 1 , R 2 , R 3 , R 4 , R 5 , X 1 and X 2 each independently represents an amino group, a hydroxy group, an alkoxy group, a cyano group, or a carboxylic acid.
- Examples of the divalent or trivalent aromatic ring in Ar include a divalent or trivalent benzene ring.
- Examples of the aryl group for X 2 include a phenyl group, a methylbenzyl group, a vinylbenzyl group, and the like.
- silane coupling agent represented by the formula (A-3) include N- (2-aminoethyl) -3-aminopropylmethyldiethoxysilane and N- (2-aminoethyl) -3. -Aminopropyltriethoxysilane, N- (2-aminoethyl) -3-aminoisobutyldimethylmethoxysilane, N- (2-aminoethyl) -3-aminoisobutylmethyldimethoxysilane, N- (2-aminoethyl)- 11-aminoundecyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, (aminoethylaminoethyl) phenyltriethoxysilane, methylbenzyl
- silane coupling agent containing an amino group other than the formula (A-3) examples include N, N-bis [3- (trimethoxysilyl) propyl] ethylenediamine, N, N′-bis [3- (trimethoxy Silyl) propyl] ethylenediamine, bis [(3-triethoxysilyl) propyl] amine, piperazinylpropylmethyldimethoxysilane, bis [3- (triethoxysilyl) propyl] urea, bis (methyldiethoxysilylpropyl) amine, 2,2-dimethoxy-1,6-diaza-2-silacyclooctane, 3,5-diamino-N- (4- (methoxydimethylsilyl) phenyl) benzamide, 3,5-diamino-N- (4- (tri Ethoxysilyl) phenyl) benzamide, 5- (ethoxydimethylsilyl) benzene
- silane coupling agent having an amino group may be used alone or in combination of two or more. Moreover, you may use combining the silane coupling agent which has an amino group, and the silane coupling agent which does not have an amino group. For example, a silane coupling agent having a mercapto group may be used for improving the adhesion with a metal.
- a polymer (siloxane polymer) formed from these silane coupling agents via a siloxane bond may be used.
- siloxane polymer formed from these silane coupling agents via a siloxane bond
- Si—O—Si siloxane bond
- a polymer having a linear siloxane structure a polymer having a branched siloxane structure, a polymer having a cyclic siloxane structure, a polymer having a cage siloxane structure, etc. Is obtained.
- the cage-like siloxane structure is represented, for example, by the following formula (A-1).
- Examples of the siloxane diamine include compounds represented by the following formula (A-2).
- i is an integer of 0 to 4
- j is an integer of 1 to 3
- Me is a methyl group.
- the compound (A) Since the compound (A) has an amino group, it is easily dissolved in the polar solvent (D) described later.
- the ratio of the total number of primary nitrogen atoms and secondary nitrogen atoms in the compound (A) to the number of silicon atoms (total number of primary nitrogen atoms and secondary nitrogen atoms / number of silicon atoms) is 0.2. It is preferable from a soluble viewpoint that it is 5 or more above.
- the affinity with a hydrophilic surface such as a silicon substrate is increased, so that a smooth film can be formed.
- a non-crosslinkable group such as a methyl group bonded to Si satisfies a relationship of (noncrosslinkable group) / Si ⁇ 2 in terms of molar ratio.
- a relationship of (noncrosslinkable group) / Si ⁇ 2 in terms of molar ratio By satisfying this relationship, the density of cross-linking of the formed film (cross-linking between Si—O—Si bond and amide bond, imide bond, etc.) is improved, and a stronger film against plasma is estimated to be formed. Is done.
- the compound (A) has a cationic functional group containing at least one of a primary nitrogen atom and a secondary nitrogen atom.
- the proportion of the primary nitrogen atom in all the nitrogen atoms in the compound (A) is preferably 20 mol% or more, and 25 mol%. More preferably, it is more preferably 30 mol% or more.
- the compound (A) may have a cationic functional group containing a primary nitrogen atom and not containing a nitrogen atom other than the primary nitrogen atom (for example, a secondary nitrogen atom or a tertiary nitrogen atom). Good.
- the proportion of secondary nitrogen atoms in all the nitrogen atoms in the compound (A) is preferably 5 mol% or more and 50 mol% or less, More preferably, it is 10 mol% or more and 45 mol% or less.
- the compound (A) may contain a tertiary nitrogen atom.
- the compound (A) may contain a tertiary nitrogen atom.
- the proportion of tertiary nitrogen atoms in the total nitrogen atoms is preferably 20 mol% or more and 50 mol% or less, and preferably 25 mol% or more and 45 mol% or less.
- the content of the compound (A) in the film composition for a semiconductor is not particularly limited, and can be, for example, 0.001% by mass to 20% by mass with respect to the entire composition, It is preferably 0.01% by mass or more and 20% by mass or less, and more preferably 0.04% by mass or more and 20% by mass or less.
- the semiconductor film composition according to this embodiment has three or more —C ( ⁇ O) OX groups (X is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms) in the molecule.
- X is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms
- COOX —C ( ⁇ O) OX groups
- one or more and six or less are —C ( ⁇ O) OH groups (hereinafter also referred to as “COOH”).
- COOH —C ( ⁇ O) OH groups
- the crosslinking agent (B) is a compound having three or more —C ( ⁇ O) OX groups (X is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms) in the molecule, preferably , A compound having 3 to 6 —C ( ⁇ O) OX groups in the molecule, and more preferably a compound having 3 or 4 —C ( ⁇ O) OX groups in the molecule.
- X in the —C ( ⁇ O) OX group includes a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and among them, a hydrogen atom, a methyl group, an ethyl group, a propyl group. Is preferred. X in the —C ( ⁇ O) OX group may be the same or different.
- the crosslinking agent (B) is a compound having one or more —C ( ⁇ O) OH groups in which X is a hydrogen atom in the molecule, and preferably —C ( ⁇ O) OH in the molecule.
- a compound having 1 or more and 4 or less groups, more preferably a compound having 2 or more and 4 or less —C ( ⁇ O) OH groups in the molecule, and still more preferably —C ( O)
- the crosslinking agent (B) is a compound having a weight average molecular weight of 200 or more and 600 or less. Preferably, it is a compound of 200 or more and 400 or less.
- the crosslinking agent (B) preferably has a ring structure in the molecule.
- the ring structure include an alicyclic structure and an aromatic ring structure.
- the crosslinking agent (B) may have a plurality of ring structures in the molecule, and the plurality of ring structures may be the same or different.
- the alicyclic structure examples include an alicyclic structure having 3 to 8 carbon atoms, preferably an alicyclic structure having 4 to 6 carbon atoms, and the ring structure may be saturated or unsaturated. Good. More specifically, as the alicyclic structure, a saturated alicyclic structure such as a cyclopropane ring, a cyclobutane ring, a cyclopentane ring, a cyclohexane ring, a cycloheptane ring, a cyclooctane ring; a cyclopropene ring, a cyclobutene ring, a cyclopentene ring, Examples thereof include unsaturated alicyclic structures such as a cyclohexene ring, a cycloheptene ring, and a cyclooctene ring.
- the aromatic ring structure is not particularly limited as long as it is an aromatic ring structure.
- aromatic rings such as benzene ring, naphthalene ring, anthracene ring and perylene ring, aromatic rings such as pyridine ring and thiophene ring
- Non-benzene aromatic rings such as heterocycles, indene rings, and azulene rings.
- the crosslinking agent (B) has in the molecule for example, at least one selected from the group consisting of a cyclobutane ring, a cyclopentane ring, a cyclohexane ring, a benzene ring, and a naphthalene ring is preferable. In view of further improving the heat resistance of the obtained film, at least one of a benzene ring and a naphthalene ring is more preferable.
- the crosslinking agent (B) may have a plurality of ring structures in the molecule, and when the ring structure is benzene, it may have a biphenyl structure, a benzophenone structure, a diphenyl ether structure, or the like.
- the crosslinking agent (B) preferably has a fluorine atom in the molecule, more preferably has 1 or more and 6 or less fluorine atoms in the molecule, and has 3 or more and 6 or less fluorine atoms in the molecule. More preferably, it has.
- the crosslinking agent (B) may have a fluoroalkyl group in the molecule, and specifically may have a trifluoroalkyl group or a hexafluoroisopropyl group.
- carboxylic acid compounds such as alicyclic carboxylic acid, benzene carboxylic acid, naphthalene carboxylic acid, diphthalic acid, and fluorinated aromatic ring carboxylic acid
- alicyclic carboxylic acid ester, benzene carboxylic acid ester, naphthalene examples thereof include carboxylic acid ester compounds such as carboxylic acid esters, diphthalic acid esters, and fluorinated aromatic ring carboxylic acid esters.
- the carboxylic acid ester compound has a carboxy group (—C ( ⁇ O) OH group) in the molecule, and in three or more —C ( ⁇ O) OX groups, at least one X is the number of carbon atoms.
- the compound is an alkyl group having 1 to 6 alkyl groups (that is, having an ester bond).
- the crosslinking agent (B) is a carboxylic acid ester compound, aggregation due to association of the compound (A) and the crosslinking agent (B) in the composition is suppressed, Aggregates and pits are reduced, and a film with higher smoothness or a film with a large film thickness can be obtained, and the film thickness can be easily adjusted.
- the carboxylic acid compound is preferably a tetravalent or lower carboxylic acid compound containing 4 or less —C ( ⁇ O) OH groups, and a trivalent containing 3 or 4 —C ( ⁇ O) OH groups. Or it is more preferable that it is a tetravalent carboxylic acid compound.
- the carboxylic acid ester compound is preferably a compound containing 3 or less carboxy groups (—C ( ⁇ O) OH groups) in the molecule and 3 or less ester bonds. More preferably, it is a compound containing 2 or less and 2 or less ester bonds.
- X is an alkyl group having 1 to 6 carbon atoms
- X is a methyl group
- an ethyl group, a propyl group, A butyl group or the like is preferable, but an ethyl group or a propyl group is preferable from the viewpoint of further suppressing aggregation due to association between the compound (A) and the crosslinking agent (B) in the composition.
- carboxylic acid compound examples include, but are not limited to, 1,2,3,4-cyclobutanetetracarboxylic acid, 1,2,3,4-cyclopentanetetracarboxylic acid, 1,3,5-cyclohexane.
- Alicyclic carboxylic acids such as tricarboxylic acid, 1,2,4-cyclohexanetricarboxylic acid, 1,2,4,5-cyclohexanetetracarboxylic acid, 1,2,3,4,5,6-cyclohexanehexacarboxylic acid; 1 , 2,4-benzenetricarboxylic acid, 1,3,5-benzenetricarboxylic acid, pyromellitic acid, benzenepentacarboxylic acid, mellitic acid and other benzenecarboxylic acids; 1,4,5,8-naphthalenetetracarboxylic acid, 2 Naphthalenecarboxylic acid such as 3,6,7-naphthalenetetracarboxylic acid; 3,3 ′, 5,5′-tetracarboxydipheny Methane, biphenyl-3,3 ′, 5,5′-tetracarboxylic acid, biphenyl-3,4 ′, 5-tricarboxylic acid, biphen
- carboxylic acid ester compound examples include compounds in which at least one carboxy group in the specific examples of the carboxylic acid compound described above is substituted with an ester group.
- carboxylic acid ester compounds include half-esterified compounds represented by the following general formulas (B-1) to (B-6).
- R in the general formulas (B-1) to (B-6) is an alkyl group having 1 to 6 carbon atoms, preferably a methyl group, an ethyl group, a propyl group, or a butyl group, and more preferably an ethyl group or a propyl group. More preferred.
- the half-esterified compound can be produced, for example, by mixing a carboxylic acid anhydride, which is an anhydride of the above-described carboxylic acid compound, with an alcohol solvent and opening the carboxylic acid anhydride.
- a carboxylic acid anhydride which is an anhydride of the above-described carboxylic acid compound
- the content of the crosslinking agent (B) in the semiconductor film composition is not particularly limited.
- the number ratio (COOH / N) is preferably 0.1 or more and 3.0 or less, more preferably 0.3 or more and 2.5 or less, and 0.4 or more and 2.2 or less. More preferably.
- an aliphatic amine having a weight average molecular weight of 10,000 to 400,000 and a weight average molecular weight of 90 to 600 having a ring structure in the molecule are described below.
- the number of carboxy groups in the crosslinking agent (B) relative to the total number of all nitrogen atoms contained in these and all nitrogen atoms contained in the compound (A) is preferably 0.1 or more and 3.0 or less.
- the semiconductor film composition according to this embodiment includes a polar solvent (D).
- the polar solvent (D) refers to a solvent having a relative dielectric constant of 5 or more at room temperature.
- Specific examples of the polar solvent (D) include protic inorganic compounds such as water and heavy water; methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, isobutyl alcohol, isopentyl alcohol, Cyclohexanol, ethylene glycol, propylene glycol, 2-methoxyethanol, 2-ethoxyethanol, benzyl alcohol, diethylene glycol, triethylene glycol, glycerol and other alcohols; tetrahydrofuran, dimethoxyethane and other ethers; furfural, acetone, ethyl methyl ketone Aldehydes and ketones such as cyclohexane; acetic anhydride, ethyl acetate,
- the polar solvent (D) preferably contains a protic solvent, more preferably water, and still more preferably ultrapure water.
- membrane composition for semiconductors is not specifically limited, For example, they are 1.0 mass% or more and 99.9996 mass% or less with respect to the whole composition, and 40 mass% or more 99 It is preferable that it is 99996 mass% or less.
- the semiconductor film composition according to this embodiment may contain an additive (C) in addition to the compound (A), the crosslinking agent (B), and the polar solvent (D).
- the additive (C) include a carboxy group-containing acid (C-1) having a weight average molecular weight of 46 to 195 and a nitrogen atom-containing base (C-2) having a weight average molecular weight of 17 to 120.
- Acid (C-1) is an acid having a carboxy group and a weight average molecular weight of 46 or more and 195 or less.
- the semiconductor film composition according to the present embodiment includes an acid (C-1) as an additive (C), whereby an amino group in the compound (A) and a carboxy group in the acid (C-1) are ionically bonded. It is presumed that the aggregation due to the association between the compound (A) and the crosslinking agent (B) is suppressed by forming.
- the interaction for example, electrostatic interaction
- the ammonium ion derived from the amino group in the compound (A) and the carboxylate ion derived from the carboxy group in the acid (C-1) is converted into the compound (A ) Is stronger than the interaction between the ammonium ion derived from the amino group and the carboxylate ion derived from the carboxy group in the cross-linking agent (B), and it is estimated that aggregation is suppressed.
- the present invention is not limited by the above estimation.
- the acid (C-1) is not particularly limited as long as it has a carboxy group and has a weight average molecular weight of 46 or more and 195 or less, and examples thereof include monocarboxylic acid compounds, dicarboxylic acid compounds, and oxydicarboxylic acid compounds. . More specifically, the acid (C-1) includes formic acid, acetic acid, malonic acid, oxalic acid, citric acid, benzoic acid, lactic acid, glycolic acid, glyceric acid, butyric acid, methoxyacetic acid, ethoxyacetic acid, phthalic acid, Examples include terephthalic acid, picolinic acid, salicylic acid, 3,4,5-trihydroxybenzoic acid, and the like.
- the content of the acid (C-1) in the semiconductor film composition is not particularly limited.
- the ratio of the number of carboxy groups (COOH / N) is preferably 0.01 or more and 10 or less, more preferably 0.02 or more and 6 or less, and further preferably 0.5 or more and 3 or less.
- an aliphatic amine having a weight average molecular weight of 10,000 to 400,000 and a weight average molecular weight of 90 to 600 having a ring structure in the molecule are described below.
- the number of carboxy groups in the acid (C-1) relative to the total number of all nitrogen atoms contained in them and all nitrogen atoms contained in the compound (A) is preferably 0.01 or more and 10 or less.
- the base (C-2) is a base having a nitrogen atom and a weight average molecular weight of 17 or more and 120 or less.
- the semiconductor film composition according to the present embodiment contains the base (C-2) as the additive (C), so that the carboxy group in the crosslinking agent (B) and the amino group in the base (C-2) are ionized.
- the base (C-2) as the additive (C)
- the carboxy group in the crosslinking agent (B) and the amino group in the base (C-2) are ionized.
- the interaction between the carboxylate ion derived from the carboxy group in the crosslinking agent (B) and the ammonium ion derived from the amino group in the base (C-2) is derived from the amino group in the compound (A).
- the base (C-2) is not particularly limited as long as it is a compound having a nitrogen atom and having a weight average molecular weight of 17 or more and 120 or less, and examples thereof include monoamine compounds and diamine compounds. More specifically, as the base (C-2), ammonia, ethylamine, ethanolamine, diethylamine, triethylamine, ethylenediamine, N-acetylethylenediamine, N- (2-aminoethyl) ethanolamine, N- (2-amino) Ethyl) glycine and the like.
- the content of the base (C-2) in the semiconductor film composition is not particularly limited.
- the content of the base (C-2) relative to the number of carboxy groups in the crosslinking agent (B) The ratio of the number of nitrogen atoms (N / COOH) is preferably 0.5 or more and 5 or less, and more preferably 0.9 or more and 3 or less.
- the semiconductor film composition according to this embodiment preferably has a sodium and potassium content of 10 mass ppb or less on an element basis. If the content of sodium or potassium is 10 mass ppb or less on an element basis, it is possible to suppress the occurrence of inconveniences in the electrical characteristics of the semiconductor device such as malfunction of the transistor.
- the semiconductor film composition further includes at least one selected from the group consisting of an aliphatic amine having a weight average molecular weight of 10,000 to 400,000 and an amine compound having a ring structure in the molecule and having a weight average molecular weight of 90 to 600. It may contain seeds.
- the aliphatic amine having a weight average molecular weight of 10,000 or more and 400,000 or less preferably has a cationic functional group containing at least one of a primary nitrogen atom and a secondary nitrogen atom.
- aliphatic amine having a weight average molecular weight of 10,000 to 400,000 are ethyleneimine, propyleneimine, butyleneimine, pentyleneimine, hexyleneimine, heptyleneimine, octyleneimine, trimethyleneimine, tetramethyleneimine, Polyalkyleneimine which is a polymer of alkyleneimine such as pentamethyleneimine, hexamethyleneimine and octamethyleneimine; polyallylamine; polyacrylamide.
- Polyethyleneimine (PEI) is produced by a known method described in Japanese Patent Publication No. 43-8828, Japanese Patent Publication No. 49-33120, Japanese Patent Application Laid-Open No. 2001-2213958, International Publication No. 2010/137711, and the like. be able to.
- Polyalkyleneimines other than polyethyleneimine can also be produced by the same method as polyethyleneimine.
- the aliphatic amine having a weight average molecular weight of 10,000 or more and 400,000 or less is also preferably the above-mentioned polyalkyleneimine derivative (polyalkyleneimine derivative; particularly preferably a polyethyleneimine derivative).
- the polyalkyleneimine derivative is not particularly limited as long as it is a compound that can be produced using the polyalkyleneimine.
- the polyalkyleneimine is obtained by introducing a crosslinkable group such as a hydroxyl group into a polyalkyleneimine, a polyalkyleneimine derivative in which an alkyl group (preferably an alkyl group having 1 to 10 carbon atoms) or an aryl group is introduced.
- polyalkyleneimine derivatives can be produced by a method usually performed using the above polyalkyleneimine. Specifically, for example, it can be produced according to the method described in JP-A-6-016809.
- polyalkyleneimine derivative a highly branched polyalkyleneimine obtained by improving the degree of branching of the polyalkyleneimine by reacting the polyalkyleneimine with a cationic functional group-containing monomer is also preferable.
- a polyalkyleneimine having a plurality of secondary nitrogen atoms in the skeleton is reacted with a cationic functional group-containing monomer, and the plurality of secondary nitrogen atoms
- a method of substituting at least a part of the monomer with a cationic functional group-containing monomer reacting a cationic functional group-containing monomer with a polyalkyleneimine having a plurality of primary nitrogen atoms at its ends, and said plurality of primary nitrogen atoms And a method of substituting at least one part thereof with a cationic functional group-containing monomer.
- Examples of the cationic functional group introduced to improve the degree of branching include aminoethyl group, aminopropyl group, diaminopropyl group, aminobutyl group, diaminobutyl group, and triaminobutyl group. From the viewpoint of reducing the functional functional group equivalent and increasing the cationic functional group density, an aminoethyl group is preferred.
- the aliphatic amine having a weight average molecular weight of 10,000 to 400,000 has a cationic functional group containing at least one of a primary nitrogen atom and a secondary nitrogen atom.
- the proportion of the primary nitrogen atom in all the nitrogen atoms in the aliphatic amine is preferably 20 mol% or more, and 25 mol% or more. More preferably, it is more preferably 30 mol% or more.
- the aliphatic amine may have a cationic functional group containing a primary nitrogen atom and not containing a nitrogen atom other than the primary nitrogen atom (for example, a secondary nitrogen atom or a tertiary nitrogen atom). .
- the proportion of secondary nitrogen atoms in the total nitrogen atoms in the aliphatic amine is preferably 5 mol% or more and 50 mol% or less. % To 45 mol% is more preferable.
- the aliphatic amine may contain a tertiary nitrogen atom in addition to the primary nitrogen atom and the secondary nitrogen atom, and when the aliphatic amine contains a tertiary nitrogen atom,
- the proportion of tertiary nitrogen atoms in the nitrogen atoms is preferably 20 mol% or more and 50 mol% or less, and preferably 25 mol% or more and 45 mol% or less.
- polyethyleneimine and its derivatives may be commercially available.
- polyethyleneimine and derivatives thereof commercially available from Nippon Shokubai Co., Ltd., BASF, MP-Biomedicals, and the like can be appropriately selected and used.
- Examples of the amine compound having a ring structure in the molecule and having a weight average molecular weight of 90 to 600 include alicyclic amines, aromatic ring amines, and heterocyclic (heterocyclic) amines.
- the molecule may have a plurality of ring structures, and the plurality of ring structures may be the same or different.
- a compound having an aromatic ring is more preferable because a thermally stable compound is easily obtained.
- amine compound having a ring structure in the molecule and having a weight average molecular weight of 90 or more and 600 or less it is easy to form a thermal crosslinking structure such as imide, imidoamide, amide and the like together with the crosslinking agent (B), and heat resistance can be improved.
- a compound having a primary amino group is preferable.
- two primary amino groups can be used since the number of thermal crosslinking structures such as imide, imidoamide and amide can be easily increased together with the crosslinking agent (B), and the heat resistance can be further improved.
- a diamine compound having a triamine compound having three primary amino groups is preferable.
- Examples of alicyclic amines include cyclohexylamine and dimethylaminocyclohexane.
- Examples of the aromatic ring amine include diaminodiphenyl ether, xylenediamine (preferably paraxylenediamine), diaminobenzene, diaminotoluene, methylenedianiline, dimethyldiaminobiphenyl, bis (trifluoromethyl) diaminobiphenyl, diaminobenzophenone, diaminobenzanilide.
- heterocyclic ring of the heterocyclic amine As the heterocyclic ring of the heterocyclic amine, a heterocyclic ring containing a sulfur atom as a hetero atom (eg, a thiophene ring), or a heterocyclic ring containing a nitrogen atom as a hetero atom (eg, a pyrrole ring, a pyrrolidine ring, a pyrazole ring, an imidazole ring) 5-membered rings such as triazole ring; 6-membered rings such as isocyanuric ring, pyridine ring, pyridazine ring, pyrimidine ring, pyrazine ring, piperidine ring, piperazine ring, triazine ring; indole ring, indoline ring, quinoline ring, acridine ring, Naphthyridine ring, quinazoline ring, purine ring, quinoxaline
- examples of the heterocyclic amine having a nitrogen-containing heterocyclic ring include melamine, ammelin, melam, melem, and tris (4-aminophenyl) amine.
- examples of the amine compound having both a heterocyclic ring and an aromatic ring include N2, N4, N6-tris (4-aminophenyl) -1,3,5-triazine-2,4,6-triamine.
- the film composition for semiconductor according to the present embodiment may contain a metal alkoxide represented by the general formula (I) when selectivity for plasma etching resistance is required (for example, gap fill material, embedded insulating film use).
- a metal alkoxide represented by the general formula (I) when selectivity for plasma etching resistance is required (for example, gap fill material, embedded insulating film use).
- R1 n M (OR2) mn (I) (wherein R1 is a non-hydrolyzable group, R2 is an alkyl group having 1 to 6 carbon atoms, M is Ti, Al, Zr, Sr, Ba, Zn, B, Ga, Y, Ge, Pb, P, Sb, V, Ta, W, La, Nd and In represent at least one metal atom selected from a metal atom group, m is a metal atom M And n is an integer from 0 to 2 when m is 4, 0 or 1 when m is 3, and when there are a plurality of R1, each
- tetraethoxy is used to improve the insulation or mechanical strength.
- methyltriethoxysilane, dimethyldiethoxysilane, trimethylethoxysilane, or the like may be mixed in order to improve the hydrophobicity of the insulating film. These compounds may be mixed for controlling the etching selectivity.
- the semiconductor film composition according to this embodiment may contain a solvent other than the polar solvent (D), and examples thereof include normal hexane.
- the film composition for a semiconductor according to the present embodiment may contain phthalic acid, benzoic acid, or the like or a derivative thereof, for example, for improving electrical characteristics.
- the film composition for a semiconductor according to the present embodiment may contain benzotriazole or a derivative thereof, for example, to suppress copper corrosion.
- the pH of the semiconductor film composition according to this embodiment is not particularly limited, but is preferably 2.0 or more and 12.0 or less.
- membrane composition for semiconductors which concerns on this embodiment includes the mixing process which mixes a compound (A) and a crosslinking agent (B).
- the semiconductor film composition contains the polar solvent (D), but the polar solvent (D) is converted into the compound (A) at an arbitrary timing for producing the semiconductor film composition.
- the timing of adding other components is not particularly limited.
- a weight average molecular weight of 46 to 195 (C-1) having a carboxy group and a base having a nitrogen atom and a weight average molecular weight of 17 to 120 At least one additive (C) selected from the group consisting of C-2) may be added to the compound (A) or the crosslinking agent (B) in the mixing step.
- the timing which adds an additive (C) is not specifically limited.
- the mixing step is a step of mixing the mixture of the acid (C-1) and the compound (A) and the crosslinking agent (B). It is preferable that That is, it is preferable to mix the compound (A) and the acid (C-1) in advance before mixing the compound (A) and the crosslinking agent (B). Thereby, when the compound (A) and the crosslinking agent (B) are mixed, the composition becomes cloudy and gelled (when gelled, it may take time to clear the composition, which is not preferable). Can be suppressed.
- the mixing step is a step of mixing the mixture of the base (C-2) and the crosslinking agent (B) and the compound (A). It is preferable that That is, it is preferable to mix the crosslinking agent (B) and the base (C-2) in advance before mixing the compound (A) and the crosslinking agent (B). Thereby, when the compound (A) and the crosslinking agent (B) are mixed, the composition becomes cloudy and gelled (when gelled, it may take time to clear the composition, which is not preferable). Can be suppressed.
- the manufacturing method of the semiconductor member according to the present embodiment includes an applying step of applying the semiconductor film composition to the substrate, and heating the substrate to which the semiconductor film composition is applied at a temperature of 250 ° C. or higher and 425 ° C. or lower. It has a heating process.
- coating process in this embodiment is a process of providing the film
- the substrate include a semiconductor substrate such as a silicon substrate, a glass substrate, a quartz substrate, a stainless steel substrate, and a plastic substrate.
- the shape of the substrate is not particularly limited, and may be any of a plate shape, a dish shape, and the like.
- the silicon substrate may be a silicon substrate on which an interlayer insulating layer (low-k film) is formed, and the silicon substrate is formed with fine grooves (concave portions), fine through holes, and the like. It may be.
- the method for applying the semiconductor film composition is not particularly limited, and a commonly used method can be used. Examples of methods that are usually used include dipping, spraying, spin coating, and bar code.
- the bar code method is preferably used when forming a film having a micron-size film thickness
- the spin coating method is used when forming a film having a nano-size film thickness (several nm to several hundred nm). It is preferable.
- the method for applying the semiconductor film composition by spin coating is not particularly limited.
- the semiconductor film composition is dropped on the surface of the substrate, and then the number of rotations of the substrate
- the method of raising and drying can be used.
- the application method of the semiconductor film composition by the spin coating method there are no particular restrictions on various conditions such as the rotation speed of the substrate, the dropping amount and dropping time of the semiconductor film composition, and the rotation speed of the substrate during drying.
- the thickness can be adjusted appropriately in consideration of the thickness of the film to be processed.
- the manufacturing method which concerns on this embodiment may have the drying process which dries the board
- the said temperature refers to the temperature of the surface to which the film
- the temperature is more preferably 90 ° C. or higher and 200 ° C. or lower, and more preferably 100 ° C. or higher and 150 ° C. or lower.
- the drying in this process can be performed by a normal method, it can be performed using a hot plate, for example.
- atmosphere atmosphere There is no restriction
- the drying time is not particularly limited, but is preferably 300 seconds or less, more preferably 200 seconds or less, still more preferably 120 seconds or less, and particularly preferably 80 seconds or less. Although there is no restriction
- the substrate to which the semiconductor film composition is applied is washed with water or the like in order to remove the excess semiconductor film composition applied to the substrate before the heating step described later. You may have the washing process to do.
- the manufacturing method which concerns on this embodiment has the above-mentioned drying process, it is preferable to perform a washing
- the manufacturing method according to the present embodiment further includes a heating step of heating the substrate to which the semiconductor film composition has been applied at a temperature of 200 ° C. or higher and 425 ° C. or lower.
- the said temperature refers to the temperature of the surface to which the film
- the compound (A) and the crosslinking agent (B) react with each other by heating to obtain a reactant, and a film containing the reactant is formed.
- the temperature is preferably 250 ° C. or higher and 400 ° C. or lower, and more preferably 300 ° C. or higher and 400 ° C. or lower.
- Absolute pressure 17Pa over atmospheric pressure or less is preferable.
- the absolute pressure is more preferably 1000 Pa to atmospheric pressure, further preferably 5000 Pa to atmospheric pressure, and particularly preferably 10,000 Pa to atmospheric pressure.
- Heating in the heating step can be performed by a normal method using a furnace or a hot plate.
- a furnace for example, SPX-1120 manufactured by Apex, VF-1000LP manufactured by Koyo Thermo System Co., Ltd., or the like can be used.
- the heating in this step may be performed in an air atmosphere or an inert gas (nitrogen gas, argon gas, helium gas, etc.) atmosphere.
- the heating time in a heating process is 1 hour or less, 30 minutes or less are preferable, 10 minutes or less are more preferable, and 5 minutes or less are especially preferable.
- the minimum of the time of a heating For example, it can be 0.1 minute.
- the surface of the substrate provided with the semiconductor film composition may be irradiated with ultraviolet rays.
- ultraviolet light having a wavelength of 170 nm to 230 nm, excimer light having a wavelength of 222 nm, excimer light having a wavelength of 172 nm, and the like are preferable.
- a recess formed in a substrate is filled with a gap fill material (embedded planarization film), and a recess formed in the substrate is filled with an insulating material (buried insulating film).
- Semiconductor member semiconductor member provided with a barrier material (barrier film) having insulation, adhesion, pore sealability, etc., between a metal and a substrate containing a low dielectric constant material such as a porous material, and a through silicon via
- the thickness of the embedded planarization film is, for example, 30 nm or more and 200 nm or less, preferably 50 nm or more and 150 nm or less.
- This semiconductor member can be used as a member in which a buried flattening film is provided in a via, for example, in a via first process when a copper multilayer wiring is formed by a dual damascene process.
- the film composition for a semiconductor according to the present embodiment is improved in terms of enhancing the filling property of the groove. It is preferable to form an embedded planarization film by applying an object to the recess (preferably, by spin coating).
- the thickness of the buried insulating film is, for example, 30 nm to 200 nm, and preferably 50 nm to 150 nm.
- the semiconductor member for example, a member using a method (STI: Shallow Trench Isolation) for forming an element isolation region by providing a buried insulating film having an insulating property in a groove of a silicon substrate, and having an insulating property.
- STI Shallow Trench Isolation
- IMD metal insulating film
- ILD interlayer insulating film
- the film composition for a semiconductor according to the present embodiment is improved in terms of enhancing the filling property into the groove. Is preferably applied to the recess (preferably by spin coating) to form a buried insulating film.
- the thickness of the barrier film is, for example, It is 0.5 nm or more and 15 nm or less, preferably 1.5 nm or more and 12 nm or less.
- This semiconductor member may be, for example, a member in which a barrier film serving as an adhesion layer is provided between the wall surface of the through hole formed in the substrate and the metal disposed in the through hole.
- the thickness of the through silicon via insulating film is, for example, 100 nm or more and 5 ⁇ m or less, Preferably they are 500 nm or more and 2 micrometers or less.
- the thickness of the through silicon via insulating film is, for example, 0.5 nm to 100 nm.
- the thickness is preferably 1 nm to 30 nm.
- the method for manufacturing a semiconductor process material according to this embodiment includes an application step of applying a semiconductor film composition to a substrate, and heating the substrate to which the semiconductor film composition is applied at a temperature of 250 ° C. or more and 425 ° C. or less. A heating step.
- each process of the manufacturing method of the process material for semiconductors is the same as each process of the manufacturing method of the above-mentioned member for semiconductors, the description is abbreviate
- Examples of the process material for a semiconductor include a sacrificial film that is temporarily formed in the manufacturing process of the semiconductor device and removed in a subsequent process.
- the semiconductor device according to this embodiment includes a compound having a weight average molecular weight of 130 or more and 10,000 or less having a substrate, a cationic functional group containing at least one of a primary nitrogen atom and a secondary nitrogen atom, and a Si—O bond.
- the reaction product of the compound (A) and the crosslinking agent (B) has high smoothness and excellent composition uniformity in the film thickness direction.
- the reaction product of the compound (A) and the crosslinking agent (B) preferably has at least one of an amide bond and an imide bond.
- the semiconductor film compositions of Examples A1 to C1 were prepared. Details are as shown below. In addition, when mixing the solution of the compound (A), the solution of the crosslinking agent (B), and the solution obtained by adding the base (C-2) to the crosslinking agent (B), there should be no precipitate in each solution to be mixed. Was confirmed and mixed.
- ehePMA was prepared by adding pyromellitic dianhydride to ethanol and heating in a water bath heated to 50 ° C.
- 1Prhe124BTC was produced by adding 124BTC anhydride to 1-propanol and stirring at room temperature to completely dissolve 124BTC anhydride powder. It was confirmed by proton NMR that an ester group was formed in the produced 1Prhe124BTC.
- Examples A1, A3, A5, A7, and A8 an ethanol (EtOH) solution and an aqueous solution of the crosslinking agent (B) having the concentrations shown in Table 1 without adding the base (C-2) to the crosslinking agent (B).
- EtOH ethanol
- a solution of 1-propanol (1PrOH) is prepared, and the ratio of the number of carboxy groups in the crosslinking agent (B) to the number of total nitrogen atoms in the compound (A) (COOH / N) was added dropwise to the 3APTES aqueous solution until 1 to 2 (“COOH / N range implemented” in Table 1).
- Examples B1 to B5 As 3-aminopropyltrimethoxysilane (3APTS; (3-Aminopropyl) trimethoxysilane) used in this example, 25 g of 3-aminopropyltrimethoxysilane was added dropwise to 25 g of water and dissolved so as to be 50% by mass. It was confirmed that the alkoxysilane was hydrolyzed by proton NMR spectrum after standing overnight at. Subsequently, 3APTS aqueous solution was prepared so that it might become the density
- a hydrolyzate of 3-aminopropyltrimethoxysilane or a siloxane polymer thereof may be present.
- 135BTC, ehePMA, ethyl half ester 1,2,4-benzenetricarboxylic acid ehe124BTC; ethyl half ester 124BTC
- ehe124BTC was prepared as a crosslinking agent (B).
- ehe124BTC was produced by adding 124BTC anhydride to ethanol and stirring at room temperature to completely dissolve 124BTC anhydride powder. It was confirmed by proton NMR that an ester group was formed in the produced ehe124BTC.
- Examples B1, B4, and B5 an ethanol solution of the crosslinking agent (B) having the concentration shown in Table 1 was prepared without adding the base (C-2) to the crosslinking agent (B).
- Examples B2 and B3 ammonia as the base (C-2) was added to 135 BTC as the cross-linking agent (B), and the number of nitrogen atoms in the base (C-2) relative to the number of carboxy groups in the cross-linking agent (B).
- the number ratio (N / COOH) was added until 2.0, and then a 135 BTC aqueous solution (10.1 mass%) was prepared. Subsequently, 135 BTC aqueous solution was dripped at 3APTS aqueous solution until the ratio (COOH / N) of the number of the carboxy group in a crosslinking agent (B) with respect to the number of all the nitrogen atoms in a compound (A) was set to one.
- the crosslinking agent (B) When the solution of the crosslinking agent (B) is dropped into the 3APTS aqueous solution in Examples B1 to B5, the crosslinking agent (B) is dropped when the solution in which the solution of the crosslinking agent (B) is dropped becomes cloudy (aggregates).
- the amount was evaluated by determining the ratio (COOH / N) of the number of carboxy groups in the crosslinking agent (B) to the number of total nitrogen atoms in the compound (A) described above. The results are shown in “COOH / N range where the composition is transparent” in Table 1. In addition, it was confirmed visually whether the solution was cloudy.
- BATDS 1,3-bis (3-aminopropyl) -tetramethyldisiloxane
- 135BTC ethanol solution 9.5% by mass
- composition of the semiconductor film composition obtained in each example is as shown in Table 1 below.
- the parentheses indicate the concentration of compound (A) in the compound (A) solution.
- the ratio “COOH / N” of the number of carboxy groups in the crosslinking agent (B) with respect to the total number of nitrogen atoms in the compound (A) is the maximum value of the “concentration in the composition” of the compound (A).
- the parentheses indicate the concentration of the crosslinking agent (B) in the crosslinking agent (B) solution
- the crosslinking agent (B) includes a base (C-2).
- 3APTES may be a hydrolyzate or a siloxane polymer.
- 3APTS may be a hydrolyzate or a siloxane polymer.
- Example A1 the ratio of the number of carboxy groups in the crosslinking agent (B) to the total number of nitrogen atoms in the compound (A) (COOH / N) was 0 to 1, and the solution in which 135 BTC was added dropwise did not become cloudy. It was transparent.
- Example A3 and A5 the solution in which 124 BTC or PMA was added dropwise at COOH / N of more than 0.7 and 0.79, respectively, was cloudy. That is, it was possible to prepare a semiconductor film composition in which aggregation was suppressed without causing cloudiness under the conditions of COOH / N of 0.7 or less and 0.79 or less, respectively.
- corrugations can be formed by forming a film
- the compound ( A solution in which each crosslinking agent (B) was dropped in all ranges of the ratio (COOH / N) of the number of carboxy groups in the crosslinking agent (B) to the total number of nitrogen atoms in A) did not become cloudy, and the semiconductor The transparency of the coating film composition could be maintained. It is presumed that a smooth film with few irregularities can be formed by forming a film using a semiconductor film composition in which aggregation is suppressed without causing cloudiness.
- Example B1 using 3-aminopropyltrimethoxysilane (3APTS) as the compound (A), the base (C-2) was not added to the cross-linking agent (B), and the cross-linking agent (B) was an ester. It was shown that many crosslinking agents (B) can be dripped in the state which maintained the transparency of the film composition for semiconductors, even if it has no bond. In Examples B2 and B3 in which the base (C-2) was added to the cross-linking agent (B), and in Examples B4 and B5 in which the cross-linking agent (B) had an ester bond, the compound (A) was used.
- 3APTS 3-aminopropyltrimethoxysilane
- Examples 1 to 17, Comparative Examples 1 to 3 A semiconductor film composition having the composition and pH shown in Table 2 below was prepared.
- acid (C-1) is used as additive (C)
- acid (C-1) is added to compound (A) solution and then crosslinker (B) is mixed.
- base (C-2) is used as the agent (C)
- a solution in which the base (C-2) is added to the crosslinking agent (B) and then the crosslinking agent (B) is dissolved in the solvent is added to the compound (C A) It is mixed in the solution.
- the concentration of compound (A) is the concentration of compound (A) in the semiconductor film composition
- the concentration in parentheses in a solvent other than water is other than water in the semiconductor film composition.
- the concentration of the solvent is the concentration of “amine other than compound (A)” in the semiconductor film composition.
- the numerical value in parentheses in the COOX-containing compound other than the crosslinking agent (B) or the crosslinking agent (B) is the carboxy group in the crosslinking agent (B) relative to the total number of nitrogen atoms in the compound (A).
- the ratio of the number of COOX groups in the COOX-containing compound other than the crosslinking agent (B) to the total number of nitrogen atoms in the compound (A) (COOX / N).
- the value in parentheses in the acid (C-1) is the ratio of the number of carboxy groups in the acid (C-1) to the number of total nitrogen atoms in the compound (A) (COOH / N).
- the numerical value in parentheses in the base (C-2) represents the ratio (N / COOH) of the number of nitrogen atoms in the base (C-2) to the number of carboxy groups in the crosslinking agent (B).
- Example 1 Compound (A) 3-aminopropyltriethoxysilane (3APTES) was dissolved in water to make a 50% by mass aqueous solution, and after standing overnight, it was confirmed that the alkoxysilane was hydrolyzed by proton NMR spectrum. The product was used for composition preparation. The weight average molecular weight (Mw) after hydrolysis was 430. 135BTC as the crosslinking agent (B) was mixed with ammonia as the base (C-2) and water to obtain a mixed solution of 135BTC (14% by mass) and ammonia.
- Mw weight average molecular weight after hydrolysis was 430.
- 135BTC as the crosslinking agent (B) was mixed with ammonia as the base (C-2) and water to obtain a mixed solution of 135BTC (14% by mass) and ammonia.
- Ammonia was added so that the ratio (N / COOH) of the number of nitrogen atoms in the base (C-2) to the number of carboxy groups in the crosslinking agent (B) was 1.5.
- a 3APTES aqueous solution, a mixed solution of 135BTC and ammonia, and water were mixed so as to have the concentrations shown in Table 2 to prepare a semiconductor film composition.
- Examples 2 to 5, 7, 8, 14 to 16 Similar to Example 1, a semiconductor film composition was prepared so as to have the composition and concentration shown in Table 2.
- 3-aminopropyldiethoxymethylsilane (3APDES) of the compound (A) in Examples 7 and 8 was dissolved in water to make a 50% by mass aqueous solution, then allowed to stand overnight, and then alkoxylated with a proton NMR spectrum. The thing which confirmed that the silane was hydrolyzed was used for composition preparation.
- the weight average molecular weight (Mw) after hydrolysis was 230.
- 3-aminopropyltrimethoxysilane (3APTS) of compound (A) in Examples 14 to 16 was dissolved in water to make a 50% by mass aqueous solution, and then allowed to stand overnight. A product that was confirmed to be hydrolyzed was used for preparing the composition.
- Example 6 Compound (A) 3-aminopropyldiethoxymethylsilane (3APDES) was dissolved in water to make a 50% by weight aqueous solution, and after standing overnight, it was confirmed that the alkoxysilane was hydrolyzed by proton NMR spectrum. The product obtained was used for the preparation of the composition. The weight average molecular weight (Mw) after hydrolysis was 230. The ratio of the number of carboxy groups in the acid (C-1) to the number of total nitrogen atoms in the compound (A) (COOH / N) was added to the 3APDES solution thus obtained with an aqueous formic acid (FA) (4.4% by mass). After mixing so as to be 0.92, the 3APDES solution is mixed with an ethanol solution of PMA, which is a crosslinking agent (B), and water so as to have the concentrations shown in Table 2, and a semiconductor film composition Was prepared.
- PMA which is a crosslinking agent (B)
- Example 9 4 g of 3-aminopropyldiethoxymethylsilane (3APDES) of compound (A) was added to 56 g of 1-propanol (1PrOH), and 20 g of formic acid (FA) aqueous solution (8.8% by mass) was added dropwise. After stirring at room temperature for 1 hour, the mixture was stirred in a water bath at 60 ° C. for 1 hour to obtain a 3APDES solution.
- 3APDES 3-aminopropyldiethoxymethylsilane
- 1-propanol half ester 1,2,4-benzenetricarboxylic acid (1Prhe124BTC; 1-propanol half ester 124BTC), which is a crosslinking agent (B), dissolves trimellitic anhydride in 1-propanol (1PrOH) What confirmed the ester group formation by NMR was used.
- a 1Prhe124BTC solution was mixed with the obtained 3APDES solution, and water and 1-propanol were further mixed so as to have the concentrations shown in Table 2, thereby preparing a semiconductor film composition.
- Example 10 Similarly to Example 9, a semiconductor film composition was prepared so as to have the composition and concentration shown in Table 2.
- Example 11 The compound (A) 3-aminopropyldiethoxymethylsilane (3APDES) was dissolved in water to make a 50% by mass aqueous solution, and then allowed to stand overnight was used for preparing the composition.
- the weight average molecular weight (Mw) after hydrolysis was 230.
- the ethylhalf ester oxydiphthalic acid (eheOPDA) solution which is a crosslinking agent (B) was obtained by dissolving 4,4′-oxydiphthalic anhydride in ethanol.
- the obtained 3APDES aqueous solution, eheOPDA solution, water, ethanol (EtOH), and 1-propanol were mixed so as to have the concentrations shown in Table 2 to prepare a semiconductor film composition.
- Example 12 The compound (A) 3-aminopropyldiethoxymethylsilane (3APDES) was dissolved in water to make a 50% by mass aqueous solution, and then allowed to stand overnight was used for preparing the composition.
- An ethanol solution of ethyl half ester pyromellitic acid (ehePMA; ethyl half ester PMA) as a crosslinking agent (B) was prepared.
- N-MAPDS N-METHYLAMINOPROPYLMETHYLDIMETHOXYSILANE
- A compound (A) was dissolved in water to make a 50% by mass aqueous solution, and then allowed to stand overnight was used for preparing the composition.
- the eheOPDA solution as the cross-linking agent (B) was obtained by dissolving oxydiphthalic anhydride in ethanol.
- the obtained N-MAPDS aqueous solution, eheOPDA solution, water, ethanol (EtOH), and 1-propanol were mixed so as to have the concentrations shown in Table 2 to prepare a semiconductor film composition.
- the amount of primary nitrogen atoms (mol%), the amount of secondary nitrogen atoms (mol%), and the amount of tertiary nitrogen atoms (mol%) were determined by dissolving the polymer sample in heavy water. Analysis of 13 C-NMR at 80 ° C. by decoupling method with single pulse reverse gate using AVANCE500 nuclear magnetic resonance apparatus, and analysis of what class of amine (nitrogen atom) each carbon atom is bound to And calculated based on the integral value. The attribution is described in European Polymer Journal, 1973, Vol. 9, pp. 559.
- the weight average molecular weight was measured using a column Asahipak GF-7M HQ using an analyzer Shodex GPC-101, and calculated using polyethylene glycol as a standard product.
- As the developing solvent an aqueous solution having an acetic acid concentration of 0.5 mol / L and a sodium nitrate concentration of 0.1 mol / L was used.
- the compound (A) 3-aminopropyltrimethoxysilane (3APTS; (3-Aminopropyl) trimethoxysilane) is dissolved in water to make a 50% by mass aqueous solution, and after standing overnight, the alkoxysilane is hydrolyzed by proton NMR spectrum. A product that was confirmed to be decomposed was used for preparing the composition.
- 135BTC as the crosslinking agent (B) was mixed with ammonia as the base (C-2) and water to obtain a mixed solution of 135BTC (14% by mass) and ammonia.
- Ammonia was added so that the ratio (N / COOH) of the number of nitrogen atoms in the base (C-2) to the number of carboxy groups in the crosslinking agent (B) was 1.5.
- An aqueous solution of branched polyethyleneimine 2 (BPEI_2) was prepared.
- a 3APTS aqueous solution, a mixed solution of 135BTC and ammonia, a BPEI_2 aqueous solution, and water were mixed so as to have the concentrations shown in Table 2 to prepare a semiconductor film composition.
- Comparative Example 3 Similar to Comparative Example 1, a 3APDES aqueous solution was prepared so as to have the composition and concentration shown in Table 2.
- a silicon substrate was prepared as a substrate on which a semiconductor film composition (hereinafter also referred to as “composition”) was applied.
- a silicon substrate is placed on a spin coater, 1.0 mL of the composition prepared in each example and each comparative example is dropped at a constant speed for 10 seconds, held for 13 seconds, and then at 2000 rpm (rpm is a rotational speed) for 1 second. , And rotated at 600 rpm for 30 seconds, and then rotated at 2000 rpm for 10 seconds and dried. By this.
- a film was formed on a silicon substrate. Subsequently, after drying at 125 ° C. for 1 minute, the film was heated at 300 ° C. for 10 minutes in a nitrogen atmosphere (30 kPa). In order to evaluate heat resistance, the film was further heated at 350 ° C., 380 ° C., and 400 ° C. for 10 minutes each (the same sample was continuously treated).
- ⁇ Crosslinked structure> The crosslinked structure of the film was measured by FT-IR (Fourier transform infrared spectroscopy).
- ⁇ SPM observation> For a film having a film thickness of less than 20 nm, the unevenness of the film was evaluated by morphological observation by SPM. Using a SPA400 (manufactured by Hitachi High-Technologies) which is a scanning probe microscope (SPM), measurement was performed in a dynamic force microscope mode in a 3 micron ⁇ 3 micron square region. When the mean square surface roughness measured by SPM was 25% or less with respect to the film thickness measured by the ellipsometer, it was judged as “smooth”. The results are shown in Table 3. In addition, the film
- Table 3 shows the measurement results and evaluation results of the physical properties of the films formed using the semiconductor film compositions according to the examples and comparative examples.
- the blank in Table 3 represents unconfirmed (crosslinked structure) or not implemented (SEM form observation and SPM form observation).
- Example 12 As shown in Table 3, the film thickness remaining ratios in Examples 1 to 8 and 12 to 17 were all 70% or more, but the film thickness remaining ratio in Comparative Example 1 was less than 66%. From this, it is presumed that the film formed from the film composition for semiconductor in each example is excellent in heat resistance.
- Example 12 since 3APDES, which is a compound having a primary amino group, was used as the crosslinking agent (B), the film thickness remaining rate was higher than that in Example 13 using N-MAPDS, which was a compound having a secondary amine. It was. From this, it is estimated that the film formed from the film composition for semiconductors using the compound having a primary amino group as the crosslinking agent (B) is superior in heat resistance.
- Example 1 the film was smooth as a result of SEM morphology observation.
- Comparative Examples 2 and 3 the film surface did not become a mirror surface, or there were a lot of minute pinholes, and it was not smooth.
- Example 4 the film was smooth as a result of SPM morphology observation.
- Example 18 In the same manner as in Example 9, a 3APDES solution, 1Prhe124BTC solution, water and 1-propanol were mixed to prepare a semiconductor film composition (solution 1).
- the concentration of the compound (A) in the semiconductor film composition is 2% by mass, and the ratio of the number of carboxy groups in the crosslinking agent (B) to the total number of nitrogen atoms in the compound (A) (COOH / N) is 1.0, the ratio of the number of carboxy groups in the acid (C-1) to the total number of nitrogen atoms in the compound (A) (COOH / N) is 1.83, in the film composition for semiconductors
- the concentration of 1-propanol was 91% by mass.
- Example 19 In the same manner as in Example 9, a 3APDES solution, 1Prhe124BTC solution, water, and 1-propanol were mixed to prepare a semiconductor film composition (solution 2).
- the concentration of the compound (A) in the semiconductor film composition is 0.2% by mass
- the ratio of the number of carboxy groups in the crosslinking agent (B) to the total number of nitrogen atoms in the compound (A) ( COOH / N) is 1.0
- the ratio of the number of carboxy groups in acid (C-1) to the total number of nitrogen atoms in compound (A) (COOH / N) is 1.83
- the film composition for semiconductors The concentration of 1-propanol was 99.1% by mass.
- a film was formed on the silicon substrate in the same manner as in Example 18.
- Example 20 The compound (A) 3-aminopropyldiethoxymethylsilane (3APDES) was dissolved in water to make a 50% by mass aqueous solution, and then allowed to stand overnight was used for preparing the composition.
- the obtained 3APDES aqueous solution, eheOPDA solution, water, ethanol (EtOH), and 1-propanol were mixed at concentrations shown in Table 4 to prepare a semiconductor film composition (Solution 3).
- a film was formed on a silicon substrate in the same manner as in Example 18.
- the numbers in parentheses in 1Prhe124BTC [1.0] and eheOPDA [1.0] are the ratio of the number of carboxy groups in 1Prhe124BTC or eheOPDA as the crosslinking agent (B) to the total number of nitrogen atoms in 3APDES as the compound (A) (COOH / N).
- 1.83 which is the numerical value in parentheses of FA represents the ratio (COOH / N) of the number of carboxy groups in FA which is acid (C-1) to the total number of nitrogen atoms in 3APDES which is compound (A). ing.
- the concentration in parentheses in 1PrOH (91% by mass), 1PrOH (99.1% by mass), 1PrOH (33% by mass), and EtOH (29% by mass) represents the concentration of 1PrOH and EtOH in the composition.
- the film thickness difference (%) between 1 cm and 13 cm from the center is “((film thickness at 1 cm from the center) ⁇ (film thickness at 13 cm from the center)) / ((film at 1 cm from the center) Thickness) + (film thickness at 5 cm from the center) + (film thickness at 9 cm from the center) + (film thickness at 13 cm from the center)) / 4) ”was calculated by multiplying by 100.
- Example 21 BPEI_2 aqueous solution and 3-aminopropyltriethoxysilane (3APTES; (3-Aminopropyl) triethoxysilane) aqueous solution were mixed, and ammonia (NH3) was added to 135BTC as a base (C-2) as N / COOH (number of carboxy groups in 135BTC). So that the ratio of the number of nitrogen atoms in ammonia to 1.5) is 1.5.
- 3APTES used was a 50% aqueous solution that was allowed to stand overnight.
- 135BTC was mixed in a mixed solution of BPEI_2 and 3APTES so that COOH / N (ratio of the number of carboxy groups in 135BTC to the number of nitrogen atoms in BPEI_2 and 3APTES) was 0.9, and the film composition for semiconductors A product (solution 4) was prepared.
- Example 22 The semiconductor film composition (solution 5) prepared in Example 2 was prepared.
- Example 23 The semiconductor film composition (solution 1) prepared in Example 18 was prepared.
- Example 24 The semiconductor film composition (solution 3) prepared in Example 20 was prepared.
- Example 25 A mixed solution of compound (A) of 3-aminopropyldiethoxymethylsilane (3APDES) and 3-aminopropyldimethylethoxysilane (3APDMS) was dissolved in 25 g of water overnight after dissolving 18.75 g of 3APDES and 6.25 g of 3APDMS. Prepared by standing.
- a film composition for semiconductor (solution 6) was prepared by mixing an ethanol solution of eheOPDA as a crosslinking agent (B), 1-propanol, ethanol, and water with the mixed solution so as to have the concentrations shown in Table 5. .
- Example 26 A mixed solution of compound (A) 3-aminopropyldiethoxymethylsilane (3APDES) and paraxylenediamine (pXDA) was added to 3APDES in water to make a 50% aqueous solution, and then allowed to stand overnight. Prepared by mixing 1-propanol solution of pXDA.
- a film composition for semiconductor (solution 7) was prepared by mixing an ethanol solution of eheOPDA as a crosslinking agent (B), ethanol, and water with the mixed solution so as to have the concentrations shown in Table 5.
- Example 27 A mixed solution of compound (A) 3-aminopropyldiethoxymethylsilane (3APDES) and bistriethoxysilylethane (BTESE) (presumed that the solution contains a siloxane polymer of 3APDES and BTESE) Then, 2.0 g of 3APDES was added to 26.15 g of 1-propanol, 10 g of aqueous formic acid (FA) solution (8.8% by mass) was added dropwise, 1.85 g of BTESE was added, and the mixture was stirred at room temperature for 1 hour, and then in a 60 ° C. water bath. And heated for 1 hour. A 1-propanol solution of 1Prhe124BTC as a crosslinking agent (B) and water were mixed with the mixed solution so as to have the composition shown in Table 5 to prepare a semiconductor film composition (solution 8).
- a 1-propanol solution of 1Prhe124BTC as a crosslinking agent (B) and water were mixed with the mixed solution so as to
- Example 28 A mixed solution (solution) of 3-aminopropyldiethoxymethylsilane (3APDES) of compound (A) and 1,1,3,3,5,5-hexaethoxy-1,3,5-trisilacyclohexane (HETSC) It is estimated that a siloxane polymer of 3APDES and HETSC is included), 2.0 g of 3APDES is added to 28.6 g of 1-propanol, and 10 g of formic acid (FA) aqueous solution (8.8% by mass) is added dropwise. Then, 1.4 g of HETSC was added, and the mixture was stirred at room temperature for 1 hour and then heated in a 60 ° C. water bath for 1 hour. A 1-propanol solution of 1Prhe124BTC as a crosslinking agent (B) and water were mixed with the mixed solution so as to have the composition shown in Table 5 to prepare a semiconductor film composition (solution 9).
- 3APDES 3-aminopropyldiethoxymethylsilane
- Example 29 1-propanol solution of compound (A) 1,3-bis (3-aminopropyl) -tetramethyldisiloxane (BATDS; 1,3-bis (3-aminopropyl) -tetramethyldisiloxane) and crosslinking agent (B)
- a film composition for semiconductor (solution 10) was prepared by mixing an ethanol solution of eheOPDA, 1-propanol, and ethanol so as to have the composition shown in Table 5.
- BPEI_2 (1.7 mass%), 3APTES (3.3 mass%), 3APTES (3 mass%), 3APDES (2 mass%), 3APDES (1.8 mass%), 3APDES ( 4% by mass), 3APDMS (0.6% by mass), pXDA (5% by mass), BTESE (3.7% by mass), HETSC (2.8% by mass) and concentration in parentheses in BATDS (2% by mass) Represents the respective concentrations of BPEI_2, 3APTES, 3APDES, 3APDMS, pXDA, BTESE, HETSC and BATDS in each composition.
- the numbers in parentheses in 135BTC [0.9], 124BTC [1.5], 1Prhe124BTC [1.0], 1Prhe124BTC [1.15], and eheOPDA [1.0] are 135BTC, 124BTC, 1Prhe124BTC relative to the total number of nitrogen atoms in compound (A).
- the ratio of the number of carboxy groups in eheOPDA (COOH / N).
- the value in parentheses of FA 1.83, represents the ratio (COOH / N) of the number of carboxy groups in FA to the total number of nitrogen atoms in compound (A).
- the numerical value in parentheses of NH3 ⁇ 1.5> represents the ratio (N / COOH) of the number of nitrogen atoms in NH3 to the number of carboxy groups in the crosslinking agent (B).
- the concentration in parentheses in (43% by mass), EtOH (36% by mass), and EtOH (59% by mass) represents the concentration of 1PrOH and EtOH in the composition.
- 0.5 mL of the composition is dropped at a constant speed for 10 seconds onto a silicon oxide substrate provided with a trench pattern having a width of 100 nm and a depth of 200 nm, held for 13 seconds, and then rotated at 2000 rpm for 1 second and 600 rpm for 30 seconds. Then, it was dried by rotating at 2000 rpm for 10 seconds.
- the dropped composition was dried at 100 ° C. for 1 minute, heated at 300 ° C. for 1 minute, and further subjected to heat treatment at 400 ° C. for 10 minutes. And it was observed by the cross-sectional SEM whether the composition was filled into the trench. The case where the filled area was 90% or more of the area in the trench was designated as A (good filling property). The results are shown in Table 5.
- 0.5 mL of the composition was dropped at a constant speed for 10 seconds on a silicon oxide substrate provided with a trench pattern having a width of 50 nm and a depth of 200 nm, held for 13 seconds, and then rotated at 2000 rpm for 1 second and 600 rpm for 30 seconds. Then, it was dried by rotating at 2000 rpm for 10 seconds. Next, the dropped composition was dried at 100 ° C. for 1 minute, heated at 300 ° C. for 1 minute, and further subjected to heat treatment at 400 ° C. for 10 minutes. And it was observed by the cross-sectional SEM whether the composition was filled into the trench. The case where the filled area was 90% or more of the area in the trench was designated as A (good filling property), and the case where the filled area was less than 90% of the area in the trench was designated as B. The results are shown in Table 5.
- the filling property was good in the 100 nm wide trench. Therefore, it was shown that by using the semiconductor film composition according to Examples 21 to 29, a film having excellent embedding property can be obtained with a 100 nm wide trench.
- the semiconductor film composition including 3APDES and 1Prhe124BTC, the semiconductor film composition including 3APDES, 3APDMS and eheOPDA, and the semiconductor film including 3APDES, pXDA and eheOPDA The embedding property of the composition was good.
- Example 24 voids of more than 10% were generated in the semiconductor film composition containing 3APDES and eheOPDA.
- Example 23 the film having an amide-imide bond
- Example 24 it is guessed that the film having an imide bond
- membrane (Example 26) formed from the solution containing pXDA which is an amine which has a ring structure is more excellent in a packing property.
- Example 30 The compound (A) 3-aminopropylmethyldiethoxysilane (3APDES) was dissolved in water to make a 50% by mass aqueous solution, and then allowed to stand overnight was used for preparing the composition.
- the weight average molecular weight (Mw) after hydrolysis was 230.
- 135BTC as the crosslinking agent (B) was mixed with ammonia as the base (C-2) and water to obtain a mixed solution of 135BTC (14% by mass) and ammonia. Ammonia was added so that the ratio (N / COOH) of the number of nitrogen atoms in the base (C-2) to the number of carboxy groups in the crosslinking agent (B) was 1.5.
- a mixed solution of 135BTC and ammonia, water and ethanol were mixed with the 3APDES aqueous solution so as to have the concentrations shown in Table 6 to prepare a semiconductor film composition (solution 12).
- Example 31 The semiconductor film composition (solution 1) prepared in Example 18 was prepared.
- Example 32 The semiconductor film composition (solution 2) prepared in Example 19 was prepared.
- Example 33 The semiconductor film composition (solution 3) prepared in Example 20 was prepared.
- the low resistance silicon substrate was rotated at 1000 rpm for 5 seconds and at 500 rpm for 30 seconds.
- the dropped composition was dried at 100 ° C. for 1 minute, then heated at 250 ° C. for 1 minute, and further subjected to heat treatment at 400 ° C. for 10 minutes. As a result, a laminate composed of a low resistance silicon substrate / film was obtained.
- the relative dielectric constant of the film in the obtained laminate was measured.
- the relative dielectric constant was measured by a conventional method at a frequency of 100 kHz in an atmosphere of 25 ° C. and a relative humidity of 30% using a mercury probe apparatus (SSM5130). The results are shown in Table 6.
- the leakage current density was measured as follows for evaluation of electrical characteristics. Specifically, a mercury probe was applied to the film surface of the obtained laminate, and the measured electric field strength values of 1 MV / cm and 2 MV / cm were taken as the leakage current density. The results are shown in Table 6.
- Table 6 shows the composition, relative dielectric constant, and leakage current density of the samples in Comparative Example 4 and Examples 30 to 33.
- the concentration in parentheses represents the concentration of BPEI_2 and 3APDES in the composition.
- the numbers in parentheses in 135BTC [0.67], 135BTC [1.0], 1Prhe124BTC [1.0] and eheOPDA [1.0] are the numbers of carboxy groups in 135BTC, 1Prhe124BTC, and eheOPDA relative to the total number of nitrogen atoms in compound (A).
- the numerical values in parentheses of AA and FA, 0.14 and 1.83, represent the ratio of the number of carboxy groups in AA or FA to the number of total nitrogen atoms in compound (A) (COOH / N).
- the numerical value in parentheses of NH3 ⁇ 1.5> represents the ratio (N / COOH) of the number of nitrogen atoms in NH3 to the number of carboxy groups in the crosslinking agent (B).
- Example 30 the relative dielectric constant was smaller than that of Comparative Example 4.
- Example 30 the leakage current density at the electric field strength of 1 MV / cm was the same as that of Comparative Example 4, but in Examples 31 to 33, the leakage current density at the electric field strength of 1 MV / cm was smaller than that of Comparative Example 4.
- the leakage current density at an electric field strength of 2 MV / cm with an increased electric field strength was lower in Examples 30 to 33 than in Comparative Example 4. Therefore, it was shown that films having excellent electrical characteristics can be obtained by using the semiconductor film compositions according to Examples 30 to 33 (particularly, Examples 31 to 33).
- Example 34 The compound (A), 3-aminopropyltriethoxysilane (3APTES), was dissolved in water to make a 50% by mass aqueous solution, and then allowed to stand overnight was used for preparing the composition.
- the weight average molecular weight (Mw) after hydrolysis was 430.
- PMA as the crosslinking agent (B) was mixed with ammonia as the base (C-2) and water to obtain a mixed solution of PMA (14% by mass) and ammonia. Ammonia was added so that the ratio (N / COOH) of the number of nitrogen atoms in the base (C-2) to the number of carboxy groups in the crosslinking agent (B) was 1.5.
- a 3APTES aqueous solution was mixed with a mixed solution of PMA and ammonia and water so as to have a concentration shown in Table 7 to prepare a semiconductor film composition (solution 13).
- Example 35 The compound (A), 3-aminopropyltriethoxysilane (3APTES), was dissolved in water to make a 50% by mass aqueous solution, and then allowed to stand overnight was used for preparing the composition.
- the weight average molecular weight (Mw) after hydrolysis was 430.
- 124BTC as the crosslinking agent (B) was mixed with ammonia as the base (C-2) and water to obtain a mixed solution of 124BTC (14% by mass) and ammonia. Ammonia was added so that the ratio (N / COOH) of the number of nitrogen atoms in the base (C-2) to the number of carboxy groups in the crosslinking agent (B) was 1.5.
- a 3APTES aqueous solution was mixed with a mixed solution of 124BTC and ammonia and water so as to have a concentration shown in Table 7 to prepare a semiconductor film composition (solution 14).
- Example 36 The compound (A), 3-aminopropyltriethoxysilane (3APTES), was dissolved in water to make a 50% by mass aqueous solution, and then allowed to stand overnight was used for preparing the composition.
- the weight average molecular weight (Mw) after hydrolysis was 430.
- 135BTC as the crosslinking agent (B) was mixed with ammonia as the base (C-2) and water to obtain a mixed solution of 135BTC (14% by mass) and ammonia. Ammonia was added so that the ratio (N / COOH) of the number of nitrogen atoms in the base (C-2) to the number of carboxy groups in the crosslinking agent (B) was 1.5.
- a 3APTES aqueous solution was mixed with a mixed solution of 135BTC and ammonia and water so as to have a concentration shown in Table 7 to prepare a semiconductor film composition (solution 15).
- Example 37 To a solution of 3-aminopropyldiethoxymethylsilane (3APDES) as compound (A), 2.0 g of 3APDES was added to 28 g of 1-propanol, and 10 g of an aqueous formic acid (FA) solution (8.8% by mass) was added dropwise. After stirring at room temperature for 1 hour, it was prepared by heating in a 60 ° C. water bath for 1 hour. In the 3APDES solution, a 1-propanol solution of 1-propanol half ester pyromellitic acid (1PrhePMA; 1-propanol half ester PMA), 1-propanol, and water as the cross-linking agent (B) so that the composition shown in Table 7 is obtained. The semiconductor film composition (solution 16) was prepared.
- 3APDES 3-aminopropyldiethoxymethylsilane
- sample preparation A silicon wafer having silica on the surface is prepared, this silicon wafer is placed on a spin coater, and 1.0 mL of a semiconductor film composition (solutions 13 to 16) is dropped at a constant rate for 10 seconds. After holding for 2 seconds, this silicon wafer was rotated at 2000 rpm for 1 second, further rotated at 600 rpm for 30 seconds, and then rotated at 2000 rpm for 10 seconds and dried. As described above, a polymer layer was formed on the silicon wafer, and a laminate having a structure in which the silicon wafer and the polymer layer were laminated (hereinafter also referred to as “sample (polymer / Si)”) was obtained.
- the sample (polymer / Si) was placed on a hot plate so that the silicon wafer surface and the hot plate were in contact with each other, and soft baked (heat treatment) at 100 ° C. soft bake temperature for 60 seconds in an air atmosphere. Further, heating was continuously performed in a nitrogen atmosphere at 300 ° C. for 10 minutes and at 400 ° C. for 10 minutes.
- the concentration in parentheses in 3APTES (10% by mass) and 3APDES (2.7% by mass) represents the concentration of 3APTES and 3APDES in the composition.
- the numbers in parentheses in PMA [2.0], 124BTC [1.5], 135BTC [1.0], and 1PrhePMA [0.7] are in PMA, 124BTC, 135BTC, and 1PrhePMA with respect to the total number of nitrogen atoms in compound (A). This represents the ratio of the number of carboxy groups (COOH / N).
- the numerical value in parentheses of NH3 ⁇ 1.5> represents the ratio (N / COOH) of the number of nitrogen atoms in NH3 to the number of carboxy groups in the crosslinking agent (B).
- the concentration in parentheses in 1PrOH (88% by mass) represents the concentration of 1PrOH in the composition.
- Example preparation A copper film having a thickness of 100 nm was formed on a silicon substrate by plating, and a substrate in which the copper film surface was cleaned by helium plasma treatment was prepared. A seal layer (polymer layer) was formed on the copper film surface after the plasma treatment in the same manner as in ⁇ Evaluation of Adhesion with Silicon (Si) Substrate>. As described above, a polymer layer was formed on copper, and a laminate having a structure in which copper and a polymer layer were laminated (hereinafter also referred to as “sample (polymer / Cu)”) was obtained.
- 124BTC as the cross-linking agent (B) was mixed with ammonia as the base (C-2) and water to obtain a mixed solution of 124BTC (14% by mass) and ammonia. Ammonia was added so that the ratio (N / COOH) of the number of nitrogen atoms in the base (C-2) to the number of carboxy groups in the crosslinking agent (B) was 1.5.
- a mixed solution of 124 BTC and ammonia was prepared by mixing 124 BTC as the crosslinking agent (B) with ammonia as the base (C-2) and water.
- a BPEI_2 aqueous solution, a mixed solution of 124BTC and ammonia, and water were mixed to a concentration shown in Table 8 to prepare a semiconductor film composition (solution 18).
- Examples 38 to 40 The semiconductor film compositions (solutions 13 to 15) prepared in Examples 34 to 36 were prepared.
- Example 41 The semiconductor film composition (solution 3) prepared in Example 20 was prepared.
- Example 42 To a solution of 3-aminopropyldiethoxymethylsilane (3APDES) as compound (A), 2.0 g of 3APDES was added to 28 g of 1-propanol, and 10 g of a formic acid (FA) aqueous solution (8.8% by mass) was added dropwise. After stirring at room temperature for 1 hour, it was prepared by heating in a 60 ° C. water bath for 1 hour.
- a film composition for semiconductor (solution 20) was prepared by mixing a 1Prhe124BTC 1-propanol solution, 1-propanol, and water as a crosslinking agent (B) into the 3APDES solution so as to have the composition shown in Table 8. .
- the polymer decomposition temperature was evaluated by the following method. 100 mg of each sample prepared in Examples 38 to 42 and Comparative Examples 5 to 14 was placed in a sample cup, and a thermogravimetric apparatus (manufactured by Shimadzu Corporation: DTG-60 (model number)) was used from 30 ° C. in a nitrogen atmosphere. It heated to 550 degreeC with the temperature increase rate of 30 degree-C / min, and measured the mass in each temperature. Table 8 shows the temperature when reduced by 10% from the mass at 300 ° C.
- the numbers in parentheses in PMA [1.8], 124BTC [1.35], 135BTC [0.9], PMA [2.0], 124BTC [1.5], 135BTC [1.0], eheOPDA [1.0], and 1Prhe124BTC [1.15] are compound (A ) Represents the ratio (COOH / N) of the number of carboxy groups in PMA, 124BTC, 135BTC, eheOPDA and 1Prhe124BTC to the total number of nitrogen atoms in The numerical value in parentheses of NH3 ⁇ 1.5> represents the ratio (N / COOH) of the number of nitrogen atoms in NH3 to the number of carboxy groups in the crosslinking agent (B).
- 1.83 which is a numerical value in parentheses of FA represents the ratio (COOH / N) of the number of carboxy groups in FA to the total number of nitrogen atoms in compound (A).
- the concentration in parentheses in 1PrOH (33% by mass), 1PrOH (76% by mass), 1PrOH (88% by mass), EtOH (29% by mass) represents the concentration of 1PrOH and EtOH in the composition.
- each sample is in a solid state, and when the temperature is further raised, the weight of the polymer decreases when the solid polymer is decomposed.
- the decomposition temperature was evaluated based on the temperature when the mass decreased at 300 ° C. by 10%. As shown in Table 8, the solid obtained from the compositions of Examples 38 to 42 containing the compound (A) having a Si—O bond and the crosslinking agent (B) does not contain the crosslinking agent (B).
- Example 43 to 45 The semiconductor film compositions (solutions 13 to 15) prepared in Examples 34 to 36 were prepared.
- Example 46 The compound (A) 3-aminopropyldiethoxymethylsilane (3APDES) was dissolved in water to make a 50% by mass aqueous solution, and then allowed to stand overnight was used for preparing the composition.
- the weight average molecular weight (Mw) after hydrolysis was 230.
- 135BTC as the crosslinking agent (B) was mixed with ammonia as the base (C-2) and water to obtain a mixed solution of 135BTC (14% by mass) and ammonia.
- a 3APDES aqueous solution, a mixed solution of 135BTC and ammonia, and water were mixed to a concentration shown in Table 10 to prepare a semiconductor film composition (solution 23).
- Example 47 To a solution of 3-aminopropyldiethoxymethylsilane (3APDES) which is compound (A), 2.0 g of 3APDES was added to 28 g of 1-propanol, and 10 g of a formic acid (FA) aqueous solution (8.8% by mass) was dropped. After stirring at room temperature for 1 hour, it was prepared by heating in a 60 ° C. water bath for 1 hour. A 3APDES solution was mixed with a 1-propanol solution of 1-propyl half-ester oxydiphthalic acid (1PrheOPDA), 1-propanol, and water as a cross-linking agent (B) so as to have the composition shown in Table 10 to obtain a semiconductor. A membrane composition (solution 24) was prepared.
- 3APDES 3-aminopropyldiethoxymethylsilane
- Example 48 The semiconductor film composition (solution 10) prepared in Example 29 was prepared.
- sample preparation A silicon wafer having silica on the surface is prepared, this silicon wafer is placed on a spin coater, 0.5 mL of a semiconductor film composition is dropped at a constant rate for 10 seconds, and held for 13 seconds. The wafer was rotated at 2000 rpm for 1 second, further rotated at 600 rpm for 30 seconds, and then rotated at 2000 rpm for 10 seconds and dried. As described above, a polymer layer was formed on the silicon wafer, and a laminate having a structure in which the silicon wafer and the polymer layer were laminated (hereinafter also referred to as “sample (polymer / Si)”) was obtained.
- the sample (polymer / Si) was placed on a hot plate so that the silicon wafer surface and the hot plate were in contact with each other and soft-baked (heat treatment) for 60 seconds at a soft baking temperature of 100 ° C. in an air atmosphere. Further, heating was continuously performed in a nitrogen atmosphere at 300 ° C. for 10 minutes and at 400 ° C. for 10 minutes.
- the etching selectivity was evaluated by subtracting the film thickness of the polymer film after being irradiated with oxygen plasma for 3 minutes and 5 minutes from the film thickness of the polymer film after being heated at 400 ° C. for 10 minutes to obtain a decrease in film thickness (nm ) Was calculated. The results are shown in Table 10.
- the concentration in parentheses in the BPEI_2 aqueous solution (1.5% by mass), 3APDES (10% by mass), 3APDES (2.7% by mass), and BATDS (2% by mass) Represents the concentration of BPEI_2, 3APDES and BATDS.
- the numbers in parentheses in PMA [1.42], 135BTC [1.0], 1PrheOPDA [0.7], and eheOPDA [1.0] are in PMA, 135BTC, 1PrheOPDA, and eheOPDA with respect to the total number of nitrogen atoms in compound (A). This represents the ratio of the number of carboxy groups (COOH / N).
- the numerical value 1.5 in parentheses for FA represents the ratio (COOH / N) of the number of carboxy groups in FA to the total number of nitrogen atoms in compound (A).
- the numerical value in parentheses of NH3 ⁇ 1.5> represents the ratio (N / COOH) of the number of nitrogen atoms in NH3 to the number of carboxy groups in the crosslinking agent (B).
- the concentration in parentheses in 1PrOH (85% by mass), 1PrOH (37% by mass), EtOH (59% by mass) represents the concentration of 1PrOH and EtOH in the composition.
- the amount of film reduction (that is, the etching rate) was smaller than that of the organic film obtained using the composition of Comparative Example 16 containing the agent (B).
- the Si—O-containing films obtained using the semiconductor film compositions of Examples 46 to 48 have a lower etching rate by oxygen plasma than the organic film (Comparative Example 16), that is, etching is performed. It was found that the selectivity was excellent.
- the Si—O-containing film obtained using the semiconductor film composition of Example 47 containing 3APDES as the compound (A) and 1PrheOPDA as the crosslinking agent (B) was Further, the amount of film reduction (ie, etching) compared to the Si—O-containing film obtained using the semiconductor film composition of Example 48 containing BATDS as the compound (A) and eheOPDA as the crosslinking agent (B) Speed) was small.
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Abstract
Description
例えば、カチオン性官能基を有し重量平均分子量が2000~1000000であるポリエチレンイミン、ポリエチレンイミン誘導体などのポリマーを含有するpHが2.0~11.0の組成物を、所定の条件を有する部材A及び部材Bの表面に付与する複合体の製造方法が知られている(例えば、特許文献1参照)。また、特許文献1には、組成物が付与された複合部材を、多価カルボン酸を含むリンス液で洗浄することが記載されている。 [特許文献1]国際公開第2014/156616号
<1> 1級窒素原子及び2級窒素原子の少なくとも1つを含むカチオン性官能基とSi-O結合とを有する化合物(A)と、分子内に-C(=O)OX基(Xは、水素原子又は炭素数1以上6以下のアルキル基である)を3つ以上有し、3つ以上の-C(=O)OX基のうち、1つ以上6つ以下が-C(=O)OH基であり、重量平均分子量が200以上600以下である架橋剤(B)と、極性溶媒(D)と、を含む、半導体用膜組成物。
<2> 1級窒素原子及び2級窒素原子の少なくとも1つを含むカチオン性官能基とSi-O結合とを有し、重量平均分子量が130以上10000以下である化合物(A)と、分子内に-C(=O)OX基(Xは、水素原子又は炭素数1以上6以下のアルキル基である)を3つ以上有し、3つ以上の-C(=O)OX基のうち、1つ以上6つ以下が-C(=O)OH基であり、重量平均分子量が200以上600以下である架橋剤(B)と、極性溶媒(D)と、を含む、半導体用膜組成物。
<3> さらに、前記架橋剤(B)は、分子内に環構造を有する、<1>又は<2>に記載の半導体用膜組成物。
<4> 前記環構造は、ベンゼン環及びナフタレン環の少なくとも一方である、<3>に記載の半導体用膜組成物。
<5> さらに、前記架橋剤(B)は、前記3つ以上の-C(=O)OX基において、少なくとも1つのXが炭素数1以上6以下のアルキル基である、<1>~<4>のいずれか1つに記載の半導体用膜組成物。
<6> カルボキシ基を有する重量平均分子量46以上195以下の酸(C-1)及び窒素原子を有する重量平均分子量17以上120以下の塩基(C-2)からなる群より選ばれる少なくとも1種の添加剤(C)をさらに含む、<1>~<5>のいずれか1つに記載の半導体用膜組成物。
<7> 重量平均分子量1万以上40万以下の脂肪族アミン及び分子内に環構造を有する重量平均分子量90以上600以下のアミン化合物からなる群より選ばれる少なくとも1種を含む、<1>~<6>のいずれか1つに記載の半導体用膜組成物。
<8> 基板に形成された凹部の充填材料に用いられる、<1>~<7>のいずれか1つに記載の半導体用膜組成物。
<9> 多層レジスト法に用いられる、<1>~<7>のいずれか1つに記載の半導体用膜組成物。
<11> 前記混合工程は、カルボキシ基を有する重量平均分子量46以上195以下の酸(C-1)と前記化合物(A)との混合物と、前記架橋剤(B)と、を混合する工程である<10>に記載の半導体用膜組成物の製造方法。
<12> 前記混合工程は、窒素原子を有する重量平均分子量17以上120以下の塩基(C-2)と前記架橋剤(B)との混合物と、前記化合物(A)と、を混合する工程である<10>に記載の半導体用膜組成物の製造方法。
以下、本発明に係る半導体用膜組成物の一実施形態について説明する。本実施形態に係る半導体用膜組成物(以下、「組成物」と称することもある。)は、1級窒素原子及び2級窒素原子の少なくとも1つを含むカチオン性官能基とSi-O結合とを有する化合物(A)と、分子内に-C(=O)OX基(Xは、水素原子又は炭素数1以上6以下のアルキル基である)を3つ以上有し、3つ以上の-C(=O)OX基のうち、1つ以上6つ以下が-C(=O)OH基であり、重量平均分子量が200以上600以下である架橋剤(B)と、極性溶媒(D)と、を含む。
特に、基板に形成された凹部の充填材料(埋め込み平坦化膜)は基板の複雑加工に用いられる場合がある。
しかしながら、半導体装置の微細化が更に進行するにつれ、パターンの線幅が微細になるだけでなく、パターンの倒れを防止するために上層レジスト膜の膜厚が薄くなり、下層レジスト膜に要求される性能においても、従来よりも微細なパターンにおける埋め込み性及びエッチング選択性、の改善が求められるようになってきた。
従来の多層レジスト法で実用化されているレジスト膜は、有機膜、上記のようなCVDによるケイ素含有無機膜等が殆どであった。しかしながら、従来のCVD法ではオーバーハングなどの問題により微細な溝をボイド無く埋め込むことが困難になってきている。
また、レジスト膜には耐熱性(例えば、レジスト膜形成後に施されることがある熱処理に対する耐性)が要求されることがある。
なお、上述の埋め込み性、エッチング選択性及び耐熱性の要求は、微細パターンの形成を実現する観点から、レジスト膜以外の膜(例えば埋め込み絶縁膜(浅溝型素子分離膜(STI膜)、プリメタル絶縁膜(PMD膜)、配線層間絶縁膜(IMD膜)等)にも求められている。
本実施形態に係る半導体用膜組成物は、1級窒素原子及び2級窒素原子の少なくとも1つを含むカチオン性官能基とSi-O結合とを有する化合物(A)を含む。化合物(A)としては、1級窒素原子及び2級窒素原子の少なくとも1つを含むカチオン性官能基とSi-O結合とを有し、重量平均分子量が130以上10000以下である化合物であってもよい。
また、「2級窒素原子」とは、水素原子1つ及び水素原子以外の原子2つのみに結合している窒素原子(即ち、下記式(a)で表される官能基に含まれる窒素原子)、又は、水素原子2つ及び水素原子以外の原子2つのみに結合している窒素原子(カチオン)を指す。
また、「3級窒素原子」とは、水素原子以外の原子3つのみに結合している窒素原子(即ち、下記式(b)で表される官能基である窒素原子)、又は、水素原子1つ及び水素原子以外の原子3つのみに結合している窒素原子(カチオン)を指す。
ここで、前記式(a)で表される官能基は、2級アミノ基(-NHRa基;ここで、Raはアルキル基を表す)の一部を構成する官能基であってもよいし、ポリマーの骨格中に含まれる2価の連結基であってもよい。
また、前記式(b)で表される官能基(即ち、3級窒素原子)は、3級アミノ基(-NRbRc基;ここで、Rb及びRcは、それぞれ独立に、アルキル基を表す)の一部を構成する官能基であってもよいし、ポリマーの骨格中に含まれる3価の連結基であってもよい。
具体的には、重量平均分子量は、展開溶媒として硝酸ナトリウム濃度0.1mol/Lの水溶液を用い、分析装置Shodex DET RI-101及び2種類の分析カラム(東ソー製 TSKgel G6000PWXL-CP及びTSKgel G3000PWXL-CP)を用いて流速1.0mL/minで屈折率を検出し、ポリエチレングリコール/ポリエチレンオキサイドを標準品として解析ソフト(Waters製 Empower3)にて算出される。
前記ノニオン性官能基は、水素結合受容基であっても、水素結合供与基であってもよい。前記ノニオン性官能基としては、例えば、ヒドロキシ基、カルボニル基、エーテル基(-O-)、等を挙げることができる。
前記アニオン性官能基は、負電荷を帯びることができる官能基であれば特に制限はない。前記アニオン性官能基としては、例えば、カルボン酸基、スルホン酸基、硫酸基等を挙げることができる。
アミノ基を有するシランカップリング剤としては、例えば下記式(A-3)で表される化合物が挙げられる。
R1、R2、R3、R4、R5、X1、X2におけるアルキル基及びアルキレン基の置換基としては、それぞれ独立に、アミノ基、ヒドロキシ基、アルコキシ基、シアノ基、カルボン酸基、スルホン酸基、ハロゲン等が挙げられる。
Arにおける2価又は3価の芳香環としては、例えば、2価又は3価のベンゼン環が挙げられる。X2におけるアリール基としては、例えば、フェニル基、メチルベンジル基、ビニルベンジル基等が挙げられる。
本実施形態に係る半導体用膜組成物は、分子内に-C(=O)OX基(Xは、水素原子又は炭素数1以上6以下のアルキル基である)を3つ以上有し、3つ以上の-C(=O)OX基(以下、「COOX」とも称する。)のうち、1つ以上6つ以下が-C(=O)OH基(以下、「COOH」とも称する。)であり、重量平均分子量が200以上600以下である架橋剤(B)を含む。
本実施形態に係る半導体用膜組成物は、極性溶媒(D)を含む。ここで、極性溶媒(D)とは室温における比誘電率が5以上である溶媒を指す。極性溶媒(D)としては、具体的には、水、重水などのプロトン性無機化合物;メタノール、エタノール、1-プロパノール、2-プロパノール、1-ブタノール、2-ブタノール、イソブチルアルコール、イソペンチルアルコール、シクロヘキサノール、エチレングリコール、プロピレングリコール、2-メトキシエタノール、2-エトキシエタノール、ベンジルアルコール、ジエチレングリコール、トリエチレングリコール、グリセリンなどのアルコール類;テトラヒドロフラン、ジメトキシエタンなどのエーテル類;フルフラール、アセトン、エチルメチルケトン、シクロヘキサンなどのアルデヒド・ケトン類;無水酢酸、酢酸エチル、酢酸ブチル、炭酸エチレン、炭酸プロピレン、ホルムアルデヒド、N-メチルホルムアミド、N,N-ジメチルホルムアミド、N-メチルアセトアミド、N,N-ジメチルアセトアミド、N-メチル-2-ピロリドン、ヘキサメチルリン酸アミドなどの酸誘導体;アセトニトリル、プロピロニトリルなどのニトリル類;ニトロメタン、ニトロベンゼンなどのニトロ化合物;ジメチルスルホキシドなどの硫黄化合物が挙げられる。極性溶媒(D)としては、プロトン性溶媒を含むことが好ましく、水を含むことがより好ましく、超純水を含むことが更に好ましい。
半導体用膜組成物中における極性溶媒(D)の含有量は、特に限定されないが、例えば、組成物全体に対して1.0質量%以上99.99896質量%以下であり、40質量%以上99.99896質量%以下であることが好ましい。
本実施形態に係る半導体用膜組成物は、前述の化合物(A)、架橋剤(B)及び極性溶媒(D)のほかに添加剤(C)を含んでいてもよい。添加剤(C)としては、カルボキシ基を有する重量平均分子量46以上195以下の酸(C-1)、窒素原子を有する重量平均分子量17以上120以下の塩基(C-2)が挙げられる。
化合物(A)及び架橋剤(B)以外の成分としてさらに、後述の、重量平均分子量1万以上40万以下の脂肪族アミン、及び、分子内に環構造を有する重量平均分子量90以上600以下のアミン化合物からなる群より選ばれる少なくとも1種を含む場合、これらに含まれる全窒素原子と化合物(A)に含まれる全窒素原子の合計数に対する、酸(C-1)中のカルボキシ基の数の比率(COOH/N)が、0.01以上10以下であることが好ましい。
本実施形態に係る半導体用膜組成物は、ナトリウム及びカリウムの含有量がそれぞれ元素基準で10質量ppb以下であることが好ましい。ナトリウム又はカリウムの含有量がそれぞれ元素基準で10質量ppb以下であれば、トランジスタの動作不良など半導体装置の電気特性に不都合が発生することを抑制できる。
重量平均分子量1万以上40万以下の脂肪族アミンとしては、1級窒素原子及び2級窒素原子の少なくとも1つを含むカチオン性官能基を有することが好ましい。また、重量平均分子量1万以上40万以下の脂肪族アミンの具体例としては、エチレンイミン、プロピレンイミン、ブチレンイミン、ペンチレンイミン、ヘキシレンイミン、ヘプチレンイミン、オクチレンイミン、トリメチレンイミン、テトラメチレンイミン、ペンタメチレンイミン、ヘキサメチレンイミン、オクタメチレンイミンなどのアルキレンイミンの重合体であるポリアルキレンイミン;ポリアリルアミン;ポリアクリルアミドが挙げられる。
これらのポリアルキレンイミン誘導体は、上記ポリアルキレンイミンを用いて通常行われる方法により製造することができる。具体的には例えば、特開平6―016809号公報等に記載の方法に準拠して製造することができる。
高分岐型のポリアルキレンイミンを得る方法としては、例えば、骨格中に複数の2級窒素原子を有するポリアルキレンイミンに対してカチオン性官能基含有モノマーを反応させ、前記複数の2級窒素原子のうちの少なくとも1部をカチオン性官能基含有モノマーによって置換する方法、末端に複数の1級窒素原子を有するポリアルキレンイミンに対してカチオン性官能基含有モノマーを反応させ、前記複数の1級窒素原子のうちの少なくとも1部をカチオン性官能基含有モノマーによって置換する方法等が挙げられる。
分岐度を向上するために導入されるカチオン性官能基としては、アミノエチル基、アミノプロピル基、ジアミノプロピル基、アミノブチル基、ジアミノブチル基、トリアミノブチル基等を挙げることができるが、カチオン性官能基当量を小さくしカチオン性官能基密度を大きくする観点から、アミノエチル基が好ましい。
芳香環アミンとしては、例えば、ジアミノジフェニルエーテル、キシレンジアミン(好ましくはパラキシレンジアミン)、ジアミノベンゼン、ジアミノトルエン、メチレンジアニリン、ジメチルジアミノビフェニル、ビス(トリフルオロメチル)ジアミノビフェニル、ジアミノベンゾフェノン、ジアミノベンズアニリド、ビス(アミノフェニル)フルオレン、ビス(アミノフェノキシ)ベンゼン、ビス(アミノフェノキシ)ビフェニル、ジカルボキシジアミノジフェニルメタン、ジアミノレゾルシン、ジヒドロキシベンジジン、ジアミノベンジジン、1,3,5-トリアミノフェノキシベンゼン、2,2’-ジメチルベンジジン、トリス(4-アミノフェニル)アミンなどが挙げられる。
複素環アミンの複素環としては、ヘテロ原子として硫黄原子を含む複素環(例えば、チオフェン環)、又は、ヘテロ原子として窒素原子を含む複素環(例えば、ピロール環、ピロリジン環、ピラゾール環、イミダゾール環、トリアゾール環等の5員環;イソシアヌル環、ピリジン環、ピリダジン環、ピリミジン環、ピラジン環、ピペリジン環、ピペラジン環、トリアジン環等の6員環;インドール環、インドリン環、キノリン環、アクリジン環、ナフチリジン環、キナゾリン環、プリン環、キノキサリン環等の縮合環等)などが挙げられる。
例えば、窒素を含有する複素環を有する複素環アミンとしては、メラミン、アンメリン、メラム、メレム、トリス(4-アミノフェニル)アミンなどが挙げられる。
更に、複素環と芳香環の両方を有するアミン化合物としては、N2,N4,N6-トリス(4-アミノフェニル)―1,3,5-トリアジン-2,4,6-トリアミンなどが挙げられる。
R1nM(OR2)m-n・・・(I)(式中、R1は非加水分解性基、R2は炭素数1~6のアルキル基であり、MはTi、Al、Zr、Sr、Ba、Zn、B、Ga、Y、Ge、Pb、P、Sb、V、Ta、W、La、Nd及びInの金属原子群から選ばれる少なくとも1種の金属原子を示し、mは金属原子Mの価数で、3又は4であり、nは、mが4の場合は0~2の整数、mが3の場合は0又は1であり、R1が複数ある場合、各R1は互いに同一であっても異なっていてもよく、OR2が複数ある場合、各OR2は互いに同一であっても異なっていてもよい。)
また、本実施形態に係る半導体用膜組成物は、例えば銅の腐食を抑制するため、ベンゾトリアゾール又はその誘導体を含有していてもよい。
以下、本発明の一実施形態に係る半導体用膜組成物の製造方法について説明する。本実施形態に係る半導体用膜組成物の製造方法は、化合物(A)と、架橋剤(B)と、を混合する混合工程を含む。なお、前述のように、半導体用膜組成物は、極性溶媒(D)を含んでいるが、半導体用膜組成物を製造する任意のタイミングにて、極性溶媒(D)を、化合物(A)、架橋剤(B)、及び化合物(A)と架橋剤(B)との混合物に添加してもよい。また、その他の成分を添加するタイミングも特に限定されない。
以下、本実施形態に係る半導体用部材の製造方法について説明する。本実施形態に係る半導体用部材の製造方法は、半導体用膜組成物を基板に付与する付与工程と、半導体用膜組成物が付与された基板を温度250℃以上425℃以下の条件で加熱する加熱工程を有する。
本実施形態における付与工程は、半導体用膜組成物を基板に付与する工程である。
基板としては、シリコン基板等の半導体基板、ガラス基板、石英基板、ステンレス基板、プラスチック基板等が挙げられる。基板の形状も特に制限されず、板状、皿状等のいずれであってもよい。例えば、シリコン基板としては、層間絶縁層(Low-k膜)が形成されたシリコン基板であってもよく、また、シリコン基板には、微細な溝(凹部)、微細な貫通孔などが形成されていてもよい。
通常用いられる方法としては、例えば、ディッピング法、スプレー法、スピンコート法、バーコード法などが挙げられる。例えば、ミクロンサイズの膜厚を有する膜を形成する場合、バーコード法を用いることが好ましく、ナノサイズ(数nm~数百nm)の膜厚を有する膜を形成する場合、スピンコート法を用いることが好ましい。
スピンコート法による半導体用膜組成物の付与方法において、基板の回転数、半導体用膜組成物の滴下量及び滴下時間、乾燥時の基板の回転数などの諸条件については特に制限はなく、形成する膜の厚さなどを考慮しながら適宜調整できる。
本実施形態に係る製造方法は、後述する加熱工程の前に、半導体用膜組成物が付与された基板を、温度80℃以上250℃以下の条件で乾燥する乾燥工程を有していてもよい。なお、前記温度は、基板の半導体用膜組成物が付与された面の温度を指す。
上記温度は、90℃以上200℃以下がより好ましく、100℃以上150℃以下がより好ましい。
本工程における乾燥を行う雰囲気には特に制限はなく、例えば、大気雰囲気下で行ってもよいし、不活性ガス(窒素ガス、アルゴンガス、ヘリウムガス等)雰囲気下で行なってもよい。
乾燥時間の下限には特に制限はないが、下限は、例えば10秒(好ましくは20秒、より好ましくは30秒)とすることができる。
本実施形態に係る製造方法は、後述する加熱工程の前に、基板に付与された余分な半導体用膜組成物を除去するために、半導体用膜組成物が付与された基板を水等で洗浄する洗浄工程を有していてもよい。また、本実施形態に係る製造方法が、前述の乾燥工程を有する場合、乾燥工程の後に、洗浄工程を行うことが好ましい。
本実施形態に係る製造方法は、更に、半導体用膜組成物が付与された基板を、温度200℃以上425℃以下の条件で加熱する加熱工程を有する。
なお、前記温度は、基板の半導体用膜組成物が付与された面の温度を指す。
この加熱工程を有することにより、化合物(A)と架橋剤(B)とが加熱により反応して反応物が得られ、その反応物を含む膜が形成される。
前記温度は、250℃以上400℃以下が好ましく、300℃以上400℃以下がより好ましい。
前記絶対圧は、1000Pa以上大気圧以下がより好ましく、5000Pa以上大気圧以下が更に好ましく、10000Pa以上大気圧以下が特に好ましい。
また、本工程における加熱は、大気雰囲気下で行なってもよく、不活性ガス(窒素ガス、アルゴンガス、ヘリウムガス等)雰囲気下で行なってもよい。
半導体用部材の例としては、基板に形成された凹部にギャップフィル材料(埋め込み平坦化膜)が充填された半導体用部材、基板に形成された凹部に絶縁材料(埋め込み絶縁膜)が充填された半導体用部材、多孔質材料などの低誘電率材料を含む基板と金属との間に絶縁性、密着性、ポアシール性などを有するバリア材料(バリア膜)が設けられた半導体用部材、シリコン貫通ビア基板のビア側壁において、金属とシリコン基板との間又は金属と絶縁膜との間に設けられ、密着性、絶縁性を有する絶縁膜(シリコン貫通ビア用絶縁膜)が設けられた半導体用部材、反転レジスト形成用の半導体用部材などが挙げられる。
なお、この半導体用部材は、銅多層配線をデュアルダマシンプロセスにて形成する際、例えばビアファーストプロセスにおいて、ビアに埋め込み平坦化膜が設けられた部材として用いることができる。
また、凹部の幅が狭く、アスペクト比(深さ/幅)の大きな溝に埋め込み平坦化膜を形成する場合には、溝への充填性を高める点から、本実施形態に係る半導体用膜組成物を凹部に付与(好ましくは、スピンコート法により付与)して埋め込み平坦化膜を形成することが好ましい。
なお、この半導体用部材としては、例えば、絶縁性を有する埋め込み絶縁膜をシリコン基板の溝に設けて素子分離領域を形成する手法(STI:シャロートレンチアイソレーション)を用いた部材、絶縁性を有する埋め込み絶縁膜を予め形成されたMOSFET(metal-oxide-semiconductor field-effect transistor)などのスイッチング素子間に設けた部材、絶縁性を有する埋め込み絶縁膜をMOSFET上にプリメタル絶縁膜(PMD)として設けた部材、絶縁性を有する埋め込み絶縁膜を予め形成された最下層配線(W、Ti/TiN/AlCu/TiNなど)の間に設けた部材、絶縁性を有する埋め込み絶縁膜を最下層配線上にインターメタル絶縁膜(IMD)として設けた部材、絶縁性を有する埋め込み絶縁膜を予め形成された銅配線間の溝に配線層間絶縁膜(ILD)として設けた部材などが挙げられる。
また、凹部の幅が狭く、アスペクト比(深さ/幅)の大きな溝に埋め込み絶縁膜を形成する場合には、溝への充填性を高める点から、本実施形態に係る半導体用膜組成物を凹部に付与(好ましくは、スピンコート法により付与)して埋め込み絶縁膜を形成することが好ましい。
以下、本実施形態に係る半導体用工程材の製造方法について説明する。本実施形態に係る半導体用工程材の製造方法は、半導体用膜組成物を基板に付与する付与工程と、半導体用膜組成物が付与された基板を温度250℃以上425℃以下の条件で加熱する加熱工程を有する。
なお、半導体用工程材の製造方法の各工程は、前述の半導体用部材の製造方法の各工程と同様であるため、その説明を省略する。
以下、本実施形態に係る半導体装置について説明する。
本実施形態に係る半導体装置は、基板と、1級窒素原子及び2級窒素原子の少なくとも1つを含むカチオン性官能基とSi-O結合とを有する重量平均分子量が130以上10000以下である化合物(A)と、分子内に-C(=O)OX基(Xは、水素原子又は炭素数1以上6以下のアルキル基である)を3つ以上有し、3つ以上の-C(=O)OX基のうち、1つ以上6つ以下が-C(=O)OH基であり、重量平均分子量が200以上600以下である架橋剤(B)との反応物を備える。化合物(A)と架橋剤(B)との反応物は、平滑性が高く、膜厚方向における組成の均一性に優れる。
化合物(A)と架橋剤(B)との反応物は、アミド結合及びイミド結合の少なくとも一方を有することが好ましい。
以下において、溶媒が示されていないものは水を使用した。
以下において、「水」としては、超純水(Millipore社製Milli-Q水、抵抗18MΩ・cm(25℃)以下)を使用した。
なお、化合物(A)の溶液、架橋剤(B)の溶液、架橋剤(B)に塩基(C-2)を加えた溶液をそれぞれ混合するときは、混合する各溶液に沈殿物がないことを確認してから混合した。
本実施例で用いる3-アミノプロピルトリエトキシシラン(3APTES;(3-Aminopropyl)triethoxysilane)として、3-アミノプロピルトリエトキシシラン25gを水25gに滴下し、50質量%となるように溶解後、室温で一晩静置した後に、プロトンNMRスペクトルでアルコキシシランが加水分解されたことを確認した。次いで、表1に示す濃度となるように3APTES水溶液を調製した。
また、架橋剤(B)として、1,3,5-ベンゼントリカルボン酸(135BTC)、1,2,4-ベンゼントリカルボン酸(124BTC;1,2,4-Benzenetricarboxylic acid)、ピロメリット酸(PMA;Pyromellitic acid)、エチルハーフエステルピロメリット酸(ehePMA;ethyl half ester PMA)、1-プロピルハーフエステル1,2,4-ベンゼントリカルボン酸(1Prhe124BTC;1-propyl half ester 124BTC)を準備した。
ehePMAは、エタノールにピロメリット酸二無水物を加えて、50℃に加熱したウォーターバスで3時間30分加熱し、ピロメリット酸二無水物粉末を完全に溶解させることにより製造した。プロトンNMRにより、製造されたehePMAにエステル基が形成されていることを確認した。
1Prhe124BTCは、1-プロパノールに124BTC無水物を加えて、室温で撹拌し、124BTC無水物粉末を完全に溶解させることにより製造した。プロトンNMRにより、製造された1Prhe124BTCにエステル基が形成されていることを確認した。
なお、溶液が白濁しているか否かは、目視により確認した。
本実施例で用いる3-アミノプロピルトリメトキシシラン(3APTS;(3-Aminopropyl)trimethoxysilane)として、3-アミノプロピルトリメトキシシラン25gを水25gに滴下して50質量%となるように溶解後、室温で一晩静置した後にプロトンNMRスペクトルでアルコキシシランが加水分解されたことを確認した。次いで、表1に示す濃度となるように3APTS水溶液を調製した。なお、3APTS水溶液中では、3-アミノプロピルトリメトキシシランの加水分解物又はそれらのシロキサン重合体が存在しうる。
また、架橋剤(B)として、135BTC、ehePMA、エチルハーフエステル1,2,4-ベンゼントリカルボン酸(ehe124BTC;ethyl half ester 124BTC)を準備した。
ehe124BTCは、エタノールに124BTC無水物を加えて、室温で撹拌し、124BTC無水物粉末を完全に溶解させることにより製造した。プロトンNMRにより、製造されたehe124BTCにエステル基が形成されていることを確認した。
なお、溶液が白濁しているかどうかは、目視により確認した。
1,3-ビス(3-アミノプロピル)-テトラメチルジシロキサン(BATDS;1,3-bis(3-aminopropyl)-tetramethyldisiloxane、化合物(A)に対応)を混合溶媒(エタノール/水=0.24、質量基準))に溶解させ、BATDS溶液(2質量%)を準備し、135BTCエタノール溶液(9.5質量%)を準備した。
次いで、BATDS水溶液(2質量%)に、135BTCエタノール溶液を、化合物(A)中の全窒素原子の数に対する架橋剤(B)中のカルボキシ基の数の比率(COOH/N)が1になるまで滴下し、半導体用膜組成物を調製した。
なお、溶液が白濁しているかどうかは、目視により確認した。
なお、「化合物(A)の種類」の項目においてカッコ書きは、化合物(A)溶液中の化合物(A)の濃度を表している。
また、化合物(A)の「組成物中濃度」は、化合物(A)中の全窒素原子の数に対する架橋剤(B)中のカルボキシ基の数の比率「COOH/N」が最大値となるように架橋剤(B)を滴下した場合において、半導体用膜組成物全体に対する化合物(A)の濃度を表している。
また、「架橋剤(B)の種類」の項目においてカッコ書きは、架橋剤(B)溶液中の架橋剤(B)の濃度を表しており、架橋剤(B)に塩基(C-2)を滴下した場合には、塩基(C-2)滴下後における架橋剤(B)溶液中の架橋剤(B)の濃度を表している。
また、実施例A1~A8において、化合物(A)として用いた3-アミノプロピルトリエトキシシラン(3APTES)は、1分子内に1級窒素原子1つ含むため、1級窒素原子/2級窒素原子/3級窒素原子=1/0/0と記載した。なお、溶液中では、3APTESは、加水分解物であってもよく、シロキサン重合体であってもよい。
また、実施例B1~B5において、化合物(A)として用いた3-アミノプロピルトリメトキシシラン(3APTS)は、1分子内に1級窒素原子1つ含むため、1級窒素原子/2級窒素原子/3級窒素原子=1/0/0と記載した。なお、溶液中では、3APTSは、加水分解物であってもよく、シロキサン重合体であってもよい。
また、実施例C1において、化合物(A)として用いた1,3-ビス(3-アミノプロピル)-テトラメチルジシロキサン(BATDS)は、1分子内に1級窒素原子2つ含むため、1級窒素原子/2級窒素原子/3級窒素原子=2/0/0と記載した。
また、架橋剤(B)に塩基(C-2)を添加した実施例A2、A4、A6、及び架橋剤(B)がエステル結合を有している実施例A7、A8では、実施した化合物(A)中の全窒素原子の数に対する架橋剤(B)中のカルボキシ基の数の比率(COOH/N)の全ての範囲において各架橋剤(B)が滴下された溶液は白濁せず、半導体用膜組成物の透明性を維持することができた。
白濁せずに凝集が抑制された半導体用膜組成物を用いて膜を形成することで、凹凸の少ない平滑な膜が形成できることが推測される。
また、架橋剤(B)に塩基(C-2)を添加した実施例B2、B3、及び架橋剤(B)がエステル結合を有している実施例B4、B5では、実施した化合物(A)中の全窒素原子の数に対する架橋剤(B)中のカルボキシ基の数の比率(COOH/N)の全ての範囲において各架橋剤(B)が滴下された溶液は白濁せず、半導体用膜組成物の透明性を維持することができた。
〔実施例1~17、比較例1~3〕
以下の表2に示す組成及びpHを有する半導体用膜組成物を調製した。なお、添加剤(C)として酸(C-1)を用いた場合には、酸(C-1)を化合物(A)溶液に添加してから架橋剤(B)を混合しており、添加剤(C)として塩基(C-2)を用いた場合には、塩基(C-2)を架橋剤(B)に添加し、その後架橋剤(B)を溶媒に溶解させた溶液を化合物(A)溶液に混合している。
また、表2において、化合物(A)の濃度は、半導体用膜組成物中における化合物(A)の濃度であり、水以外の溶媒におけるカッコ内の濃度は、半導体用膜組成物中における水以外の溶媒の濃度である。
また、表2において、「化合物(A)以外のアミン」の濃度は、半導体用膜組成物中における「化合物(A)以外のアミン」の濃度である。
また、表2において、架橋剤(B)又は架橋剤(B)以外のCOOX含有化合物におけるカッコ内の数値は、化合物(A)中の全窒素原子の数に対する架橋剤(B)中のカルボキシ基の数の比率(COOH/N)、又は化合物(A)中の全窒素原子の数に対する架橋剤(B)以外のCOOX含有化合物中のCOOX基の数の比率(COOX/N)を表す。
また、表2において、酸(C-1)におけるカッコ内の数値は、化合物(A)中の全窒素原子の数に対する酸(C-1)中のカルボキシ基の数の比率(COOH/N)を表し、塩基(C-2)におけるカッコ内の数値は、架橋剤(B)中のカルボキシ基の数に対する塩基(C-2)中の窒素原子の数の比率(N/COOH)を表す。
化合物(A)の3-アミノプロピルトリエトキシシラン(3APTES)は、水に溶解して50質量%水溶液とした後、一晩静置後にプロトンNMRスペクトルでアルコキシシランが加水分解されたことを確認した物を組成物調製に用いた。加水分解後の重量平均分子量(Mw)は、430であった。
架橋剤(B)である135BTCに塩基(C-2)であるアンモニアと水を混合させて、135BTC(14質量%)とアンモニアとの混合溶液とした。アンモニアは、架橋剤(B)中のカルボキシ基の数に対する塩基(C-2)中の窒素原子の数の比率(N/COOH)が1.5となるように添加した。
次いで、3APTES水溶液、135BTCとアンモニアとの混合溶液、及び水を表2に示す濃度となるように混合して、半導体用膜組成物を調製した。
実施例1と同様に、表2に示す組成及び濃度となるように、半導体用膜組成物を調製した。
ここで、実施例7、8における化合物(A)の3-アミノプロピルジエトキシメチルシラン(3APDES)は、水に溶解して50質量%水溶液とした後、一晩静置後にプロトンNMRスペクトルでアルコキシシランが加水分解されたことを確認した物を組成物調製に用いた。加水分解後の重量平均分子量(Mw)は、230であった。
また、実施例14~16における化合物(A)の3-アミノプロピルトリメトキシシラン(3APTS)は、水に溶解して50質量%水溶液とした後、一晩静置後にプロトンNMRスペクトルでアルコキシシランが加水分解されたことを確認した物を組成物調製に用いた。
化合物(A)の3-アミノプロピルジエトキシメチルシラン(3APDES)は、水に溶解して50質量%水溶液とした後、一晩静置後にプロトンNMRスペクトルでアルコキシシランが加水分解されたことを確認した物を組成物調製に用いた。加水分解後の重量平均分子量(Mw)は、230であった。
得られた3APDES溶液にギ酸(FA)水溶液(4.4質量%)を化合物(A)中の全窒素原子の数に対する酸(C-1)中のカルボキシ基の数の比率(COOH/N)が0.92になるように混合させた後、3APDES溶液に、架橋剤(B)であるPMAのエタノール溶液、及び水を表2に示す濃度となるように混合して、半導体用膜組成物を調製した。
化合物(A)の3-アミノプロピルジエトキシメチルシラン(3APDES)4gを、1-プロパノール(1PrOH)56gに添加し、ギ酸(FA)水溶液(8.8質量%)20gを滴下した。室温で1時間撹拌後、60℃のウォーターバス中で1時間撹拌し、3APDES溶液を得た。
架橋剤(B)である1-プロパノールハーフエステル1,2,4-ベンゼントリカルボン酸(1Prhe124BTC;1-propanol half ester 124BTC)は、トリメリット酸無水物を1-プロパノール(1PrOH)に溶解し、プロトンNMRによりエステル基が形成されたことを確認したものを用いた。
得られた3APDES溶液に、1Prhe124BTC溶液を混合し、更に水、及び1-プロパノールを表2に示す濃度となるように混合して、半導体用膜組成物を調製した。
実施例9と同様に、表2に示す組成及び濃度となるように、半導体用膜組成物を調製した。
化合物(A)の3-アミノプロピルジエトキシメチルシラン(3APDES)は、水に溶解して50質量%水溶液とした後、一晩静置した物を組成物調製に用いた。加水分解後の重量平均分子量(Mw)は、230であった。
架橋剤(B)であるエチルハーフエステルオキシジフタル酸(eheOPDA;ethylhalf ester oxydiphthalic acid)溶液は、4,4’-オキシジフタル酸無水物をエタノールに溶解して得た。
得られた3APDES水溶液、eheOPDA 溶液、水、エタノール(EtOH)、及び1-プロパノールを表2に示す濃度となるように混合して、半導体用膜組成物を調製した。
化合物(A)の3-アミノプロピルジエトキシメチルシラン(3APDES)は、水に溶解して50質量%水溶液とした後、一晩静置した物を組成物調製に用いた。加水分解後の重量平均分子量(Mw)は、230であった。
架橋剤(B)であるエチルハーフエステルピロメリット酸(ehePMA;ethyl half ester PMA)のエタノール溶液を準備した。
架橋剤(B)である1,2,4,5-シクロヘキサンテトラカルボキシルエチルハーフエステル(eheHPMA 1,2,4,5-Cyclohexanetetracarboxylic ethyl half ester)のエタノール溶液を準備した。
得られた3APDES水溶液、ehePMA溶液、eheHPHA溶液、水、エタノール(EtOH)、及び1-プロパノールを表2に示す濃度となるように混合して、半導体用膜組成物を調製した。
化合物(A)のN-METHYLAMINOPROPYLMETHYLDIMETHOXYSILANE(N-MAPDS)は、水に溶解して50質量%水溶液とした後、一晩静置した物を組成物調製に用いた。
架橋剤(B)であるeheOPDA溶液は、オキシジフタル酸無水物をエタノールに溶解して得た。
得られたN-MAPDS水溶液、eheOPDA溶液、水、エタノール(EtOH)、及び1-プロパノールを表2に示す濃度となるように混合して、半導体用膜組成物を調製した。
<分岐ポリエチレンイミン2>
分岐ポリエチレンイミン2(BPEI_2)としては、BASF社製ポリエチレンイミン(Mw=70,000、1級窒素原子/2級窒素原子/3級窒素原子=31/40/29)を用いた。
1級窒素原子の量(mol%) = (1級窒素原子のmol数/(1級窒素原子のmol数+2級窒素原子のmol数+3級窒素原子のmol数))×100 ・・・ 式A
2級窒素原子の量(mol%) = (2級窒素原子のmol数/(1級窒素原子のmol数+2級窒素原子のmol数+3級窒素原子のmol数))×100 ・・・ 式B
3級窒素原子の量(mol%) = (3級窒素原子のmol数/(1級窒素原子のmol数+2級窒素原子のmol数+3級窒素原子のmol数))×100 ・・・ 式C
架橋剤(B)である135BTCに塩基(C-2)であるアンモニアと水を混合させて、135BTC(14質量%)とアンモニアとの混合溶液とした。アンモニアは、架橋剤(B)中のカルボキシ基の数に対する塩基(C-2)中の窒素原子の数の比率(N/COOH)が1.5となるように添加した。
分岐ポリエチレンイミン2(BPEI_2)の水溶液を準備した。
3APTS水溶液、135BTCとアンモニアとの混合溶液、BPEI_2水溶液、及び水を表2に示す濃度となるように混合して、半導体用膜組成物を調製した。
化合物(A)の3-アミノプロピルトリエトキシシラン(3APTES)は、水に溶解して50質量%水溶液とした後、一晩静置後にプロトンNMRスペクトルでアルコキシシランが加水分解されたことを確認した物を組成物調製に用いた。次いで、表2に示す濃度となるように3APTES水溶液を調製した。
化合物(A)の3-アミノプロピルトリエトキシシラン(3APTES)は、水に溶解して50質量%水溶液とした後、一晩静置した物を組成物調製に用いた。
得られた3APTES(50質量%)水溶液、カルボキシ基を有さず、3つのエステル結合を有するトリプロピル-1,2,4-ベンゼントリカルボン酸(TrPr124BTC;tripropyl-124BTC)1-プロパノール溶液、及び1-プロパノールを表2に示す濃度となるように混合して、半導体用膜組成物を調製した。
比較例1と同様に、表2に示す組成及び濃度となるように、3APDES水溶液を調製した。
半導体用膜組成物(以下、「組成物」とも称する。)を塗布する基板としてシリコン基板を準備した。シリコン基板をスピンコーターの上にのせ、各実施例及び各比較例で調製した組成物1.0mLを10秒間一定速度で滴下し、13秒間保持した後、2000rpm(rpmは回転速度)で1秒間、600rpmで30秒間回転させた後、2000rpmで10秒間回転させて乾燥させた。これにより。シリコン基板上に膜を形成した。
次いで、125℃で1分乾燥後、窒素雰囲気(30kPa)、300℃で10分間、膜を加熱した。耐熱性の評価のため、さらに、350℃、380℃、400℃で各々10分間、膜を加熱した(同じサンプルを連続処理)。
400℃加熱後において、シリコン基板上に形成された屈折率を測定した。屈折率は、エリプソメーターを使用して測定した。膜厚は、測定した光学データより計算した。膜厚が10nm以上のときは、空気/(コーシー+ローレンツ振動子モデル)/自然酸化膜/シリコン基板の光学モデルでフィッティングした。膜厚が10nm未満のときは、10nm以上の厚膜である同じ組成の材料の複素屈折率を使ったコーシー+ローレンツ振動子モデルを用いた、空気/(コーシー+ローレンツ振動子モデル)/自然酸化膜/シリコン基板の光学モデルでフィッティングした。膜厚は、計算で求めたため、結果がマイナスにもなりうる。
表3において、N633は波長633nmにおける屈折率を表す。
結果を表3に示す。
300℃で10分間加熱した後の膜厚及び380℃で10分間加熱した後の膜厚から算出される膜厚残存率を基準にして膜の耐熱性を評価した。膜厚残存率の式は以下に示すとおりであり、膜厚残存率が70%以上のものは「耐熱性あり」と判断した。
膜厚残存率(%)=(380℃加熱後の膜厚/300℃加熱後の膜厚)×100
結果を表3に示す。
膜の架橋構造をFT-IR(フーリエ変換赤外分光法)で測定した。用いた分析装置は以下のとおりである。
~FT-IR分析装置~
赤外吸収分析装置(DIGILAB Excalibur(DIGILAB社製))
~測定条件~
IR光源:空冷セラミック、 ビームスプリッター:ワイドレンジKBr、 検出器:ペルチェ冷却DTGS、 測定波数範囲:7500cm-1~400cm-1、 分解能:4cm-1、 積算回数:256、 バックグラウンド:Siベアウェハ使用、 測定雰囲気:N2(10L/min)、 IR(赤外線)の入射角:72°(=Siのブリュースター角)
~判断条件~
イミド結合は1770cm-1、1720cm-1の振動ピークの存在で判断した。アミド結合は1650cm-1、1520cm-1の振動ピークの存在で判断した。
結果を表3に示す。
膜厚が20nm以上150nm以下の膜については、膜の平滑性をSEMによる形態観察で評価した。走査型電子顕微鏡(SEM)であるS-5000(日立製作所製)を用い、加速電圧3kV、200,000倍、500nm幅視野で測定した。平均膜厚に対して、最大膜厚と最小膜厚の差が25%以下である場合には「平滑性あり」と判断した。
結果を表3に示す。なお、400℃で10分間加熱した後の膜をSEM形態観察の対象とした。
膜厚が20nm未満の膜については、膜の凹凸をSPMによる形態観察で評価した。走査型プローブ顕微鏡(SPM)であるSPA400(日立ハイテクノロジーズ製)を用い、ダイナミックフォースマイクロスコープモードにて、3ミクロン×3ミクロン角領域で測定を行った。エリプソメーターで測定された膜厚に対して、SPMにて測定された自乗平均面粗さが25%以下である場合には「平滑性あり」と判断した。
結果を表3に示す。なお、400℃で10分間加熱した後の膜をSPM形態観察の対象とした。
実施例12は、架橋剤(B)として1級アミノ基を有する化合物である3APDESを用いたため、第二級アミンを有する化合物であるN-MAPDSを用いた実施例13より膜厚残存率が高かった。このことから、架橋剤(B)として1級アミノ基を有する化合物を用いた半導体用膜組成物から形成された膜は、耐熱性により優れることが推測される。
また、実施例1~3、7、9~11、13、14では、SEM形態観察の結果、膜は平滑であった。
一方、比較例2、3では、膜表面が鏡面にならないか、あるいは微小なピンホールが多数存在し、平滑ではなかった。
更に、実施例4では、SPM形態観察の結果、膜は平滑であった。
〔実施例18〕
実施例9と同様に、3APDES溶液、1Prhe124BTC溶液、水及び1-プロパノールを混合して、半導体用膜組成物(溶液1)を調製した。
溶液1において、半導体用膜組成物中における化合物(A)の濃度は2質量%、化合物(A)中の全窒素原子の数に対する架橋剤(B)中のカルボキシ基の数の比率(COOH/N)は1.0、化合物(A)中の全窒素原子の数に対する酸(C-1)中のカルボキシ基の数の比率(COOH/N)は1.83、半導体用膜組成物中における1-プロパノールの濃度は91質量%とした。
次いで、300ミリφシリコン基板に塗布液6mLを滴下後、シリコン基板を、1000rpmで1秒、600rpmで60秒、1000rpmで5秒回転後、100℃で2分間乾燥し、250℃で1分間加熱し、更に大気圧窒素中400℃で10分間加熱処理を行った。これにより、シリコン基板上に膜を形成した。
実施例9と同様に、3APDES溶液、1Prhe124BTC溶液、水、及び1-プロパノールを混合して、半導体用膜組成物(溶液2)を調製した。
溶液2において、半導体用膜組成物中における化合物(A)の濃度は0.2質量%、化合物(A)中の全窒素原子の数に対する架橋剤(B)中のカルボキシ基の数の比率(COOH/N)は1.0、化合物(A)中の全窒素原子の数に対する酸(C-1)中のカルボキシ基の数の比率(COOH/N)は1.83、半導体用膜組成物中における1-プロパノールの濃度は99.1質量%とした。
次いで、実施例18と同様にシリコン基板上に膜を形成した。
化合物(A)の3-アミノプロピルジエトキシメチルシラン(3APDES)は、水に溶解して50質量%水溶液とした後、一晩静置した物を組成物調製に用いた。加水分解後の重量平均分子量(Mw)は、230であった。
架橋剤(B)であるエチルハーフエステルオキシジフタル酸(eheOPDA;ethylhalf ester oxydiphthalic acid)溶液は、4,4’-オキシジフタル酸無水物をエタノールに溶解して得た。
得られた3APDES水溶液、eheOPDA溶液、水、エタノール(EtOH)、及び1-プロパノールを表4に示す濃度となるように混合して、半導体用膜組成物(溶液3)を調製した。
得られた半導体用膜組成物(溶液3)を用いて、実施例18と同様にシリコン基板上に膜を形成した。
結果を表4に示す。
なお、表4中では、3APDES(2質量%)、3APDES(0.2質量%)、3APDES(1.8質量%)におけるカッコ内の濃度は、組成物中における3APDESの濃度を表している。
1Prhe124BTC[1.0]、eheOPDA[1.0]におけるカッコ内の数値は、化合物(A)である3APDES中の全窒素原子の数に対する、架橋剤(B)である1Prhe124BTC又はeheOPDA中のカルボキシ基の数の比率(COOH/N)を表している。
FAのカッコ内の数値である1.83は、化合物(A)である3APDES中の全窒素原子の数に対する酸(C-1)であるFA中のカルボキシ基の数の比率(COOH/N)を表している。
1PrOH(91質量%)、1PrOH(99.1質量%)、1PrOH(33質量%)、及びEtOH(29質量%)におけるカッコ内の濃度は、組成物中における1PrOH及びEtOHの濃度を表している。
また、「中心から1cmと13cmでの膜厚差(%)」は、「((中心から1cmでの膜厚)-(中心から13cmでの膜厚))/((中心から1cmでの膜厚)+(中心から5cmでの膜厚)+(中心から9cmでの膜厚)+(中心から13cmでの膜厚))/4)」に100を掛けて算出した。
〔実施例21〕
BPEI_2水溶液及び3-アミノプロピルトリエトキシシラン(3APTES;(3-Aminopropyl)triethoxysilane)水溶液を混合し、135BTCに塩基(C-2)としてアンモニア(NH3)をN/COOH(135BTC中のカルボキシ基の数に対するアンモニア中の窒素原子の数の比率)が1.5になるように混合した。ここで、3APTESは50%水溶液として一晩静置した物を用いた。
次いで、COOH/N(BPEI_2及び3APTES中の窒素原子の数に対する135BTC中のカルボキシ基の数の比率)が0.9となるように135BTCをBPEI_2及び3APTESの混合溶液に混合し、半導体用膜組成物(溶液4)を調製した。
実施例2で調製した半導体用膜組成物(溶液5)を用意した。
実施例18で調製した半導体用膜組成物(溶液1)を用意した。
実施例20で調製した半導体用膜組成物(溶液3)を用意した。
化合物(A)の3-アミノプロピルジエトキシメチルシラン(3APDES)と3-アミノプロピルジメチルエトキシシラン(3APDMS)との混合溶液を、3APDES18.75gと3APDMS6.25gを水25gに溶解した後、一晩静置して調製した。
混合溶液に、架橋剤(B)であるeheOPDAのエタノール溶液、1-プロパノール、エタノール、及び水を表5に示す濃度となるように混合して、半導体用膜組成物(溶液6)を調製した。
化合物(A)の3-アミノプロピルジエトキシメチルシラン(3APDES)とパラキシレンジアミン(pXDA)との混合溶液を、3APDESを水に加えて50%水溶液とした後、一晩静置した物に、pXDAの1-プロパノール溶液を混合させて、調製した。
混合溶液に、架橋剤(B)であるeheOPDAのエタノール溶液、エタノール、水を表5に示す濃度となるように混合して、半導体用膜組成物(溶液7)を調製した。
化合物(A)の3-アミノプロピルジエトキシメチルシラン(3APDES)とビストリエトキシシリルエタン(BTESE)との混合溶液(溶液中には3APDESとBTESEとのシロキサン重合体が含まれると推定される)を、1-プロパノール26.15gに3APDES2.0gを加えて、ギ酸(FA)水溶液(8.8質量%)を10g滴下し、BTESE1.85gを加え、室温で一時間撹拌後に、60℃ウォーターバス中で一時間加熱して調製した。
混合溶液に、架橋剤(B)である1Prhe124BTCの1-プロパノール溶液、及び水を表5に示す組成となるように混合して、半導体用膜組成物(溶液8)を調製した。
化合物(A)の3-アミノプロピルジエトキシメチルシラン(3APDES)と1,1,3,3,5,5-ヘキサエトキシ-1,3,5-トリシラシクロヘキサン(HETSC)との混合溶液(溶液中には3APDESとHETSCとのシロキサン重合体が含まれると推定される)を、1-プロパノール28.6gに3APDES2.0gを加えて、ギ酸(FA)水溶液(8.8質量%)を10g滴下し、HETSC1.4gを加え、室温で一時間撹拌後に、60℃ウォーターバス中で一時間加熱して調製した。
混合溶液に、架橋剤(B)である1Prhe124BTCの1-プロパノール溶液、及び水を表5に示す組成となるように混合して、半導体用膜組成物(溶液9)を調製した。
化合物(A)である1,3-ビス(3-アミノプロピル)-テトラメチルジシロキサン(BATDS;1,3-bis(3-aminopropyl)-tetramethyldisiloxane)の1-プロパノール溶液と、架橋剤(B)であるeheOPDAのエタノール溶液と、1-プロパノールと、エタノールとを表5に示す組成となるように混合して、半導体用膜組成物(溶液10)を調製した。
135BTC[0.9]、124BTC[1.5]、1Prhe124BTC[1.0]、1Prhe124BTC[1.15]、及びeheOPDA[1.0]におけるカッコ内の数値は、化合物(A)中の全窒素原子の数に対する、135BTC、124BTC、1Prhe124BTC、及びeheOPDA中のカルボキシ基の数の比率(COOH/N)を表している。
FAのカッコ内の数値である1.83は、化合物(A)中の全窒素原子の数に対するFA中のカルボキシ基の数の比率(COOH/N)を表している。
NH3<1.5>のカッコ内の数値は、架橋剤(B)中のカルボキシ基の数に対するNH3中の窒素原子の数の比率(N/COOH)を表している。
1PrOH(91質量%)、1PrOH(33質量%)、1PrOH(28質量%)、1PrOH(2質量%)、1PrOH(69質量%)、1PrOH(37質量%)、EtOH(29質量%)、EtOH(43質量%)、EtOH(36質量%)、及びEtOH(59質量%)におけるカッコ内の濃度は、組成物中における1PrOH及びEtOHの濃度を表している。
そして、断面SEMでトレンチに組成物が充填されているか観察した。充填された面積がトレンチ内面積の90%以上である場合をA(充填性が良好)とした。
結果を表5に示す。
そして、断面SEMでトレンチに組成物が充填されているか観察した。充填された面積がトレンチ内面積の90%以上である場合をA(充填性が良好)とし、充填された面積がトレンチ内面積の90%未満である場合をBとした。
結果を表5に示す。
50nm幅トレンチでは、実施例23、25、26の結果から、3APDES及び1Prhe124BTCを含む半導体用膜組成物、3APDES、3APDMS及びeheOPDAを含む半導体用膜組成物、3APDES、pXDA及びeheOPDAを含む半導体用膜組成物の埋め込み性が良好であった。一方、実施例24では、3APDES及びeheOPDAを含む半導体用膜組成物では10%超のボイドが発生した。
このことから、イミド結合を有する膜(実施例24)よりも、アミドイミド結合を有する膜(実施例23)の方が、充填性がより優れることが推察される。また、実施例24と実施例26から、環構造を有するアミンであるpXDAを含有する溶液から形成される膜(実施例26)は、充填性がより優れることが推察される。
〔比較例4〕
BPEI_2水溶液に酸(C-1)として酢酸(AA)をCOOH/N(BPEI_2中の窒素原子の数に対する酢酸中のカルボキシ基の数の比率)が0.14となるように加えた。次いで、COOH/N(BPEI_2中の窒素原子の数に対する135BTC中のカルボキシ基の数の比率)が0.67となるように135BTCをBPEI_2水溶液に混合し、組成物全体に対するエタノール(EtOH)の濃度が33質量%となるように、エタノールを混合し、半導体用膜組成物(溶液11)を調製した。
化合物(A)の3-アミノプロピルメチルジエトキシシラン(3APDES)は、水に溶解して50質量%水溶液とした後、一晩静置した物を組成物調製に用いた。加水分解後の重量平均分子量(Mw)は、230であった。
架橋剤(B)である135BTCに塩基(C-2)であるアンモニアと水を混合させて、135BTC(14質量%)とアンモニアとの混合溶液とした。アンモニアは、架橋剤(B)中のカルボキシ基の数に対する塩基(C-2)中の窒素原子の数の比率(N/COOH)が1.5となるように添加した。
3APDES水溶液に、135BTCとアンモニアとの混合溶液、水及びエタノールを表6に示す濃度となるように混合して、半導体用膜組成物(溶液12)を調製した。
実施例18で調製した半導体用膜組成物(溶液1)を用意した。
実施例19で調製した半導体用膜組成物(溶液2)を用意した。
実施例20で調製した半導体用膜組成物(溶液3)を用意した。
得られた積層体における膜の比誘電率を測定した。
比誘電率は、水銀プローブ装置(SSM5130)を用い、25℃、相対湿度30%の雰囲気下、周波数100kHzにて常法により測定した。
結果を表6に示す。
次に、電気特性評価のため、以下のようにリーク電流密度を測定した。具体的には、得られた積層体の膜表面に水銀プローブを当て、測定された電界強度1MV/cm、及び2MV/cmの値をリーク電流密度とした。
結果を表6に示す。
なお、表6中では、BPEI_2水溶液(1.8質量%)、3APDES(3質量%)、3APDES(2質量%)、3APDES(0.2質量%)、及び3APDES(1.8質量%)におけるカッコ内の濃度は、組成物中におけるBPEI_2及び3APDESの濃度を表している。
135BTC[0.67]、135BTC[1.0]、1Prhe124BTC[1.0]及びeheOPDA[1.0]におけるカッコ内の数値は、化合物(A)中の全窒素原子の数に対する、135BTC、1Prhe124BTC、及びeheOPDA中のカルボキシ基の数の比率(COOH/N)を表している。
AA及びFAのカッコ内の数値である0.14及び1.83は、は、化合物(A)中の全窒素原子の数に対するAA又はFA中のカルボキシ基の数の比率(COOH/N)を表している。
NH3<1.5>のカッコ内の数値は、架橋剤(B)中のカルボキシ基の数に対するNH3中の窒素原子の数の比率(N/COOH)を表している。
1PrOH(91質量%)、1PrOH(99.1質量%)、1PrOH(33質量%)、EtOH(33質量%)、EtOH(30質量%)及びEtOH(29質量%)におけるカッコ内の濃度は、組成物中における1PrOH及びEtOHの濃度を表している。
実施例30は比較例4と電界強度1MV/cmにおけるリーク電流密度は同等であったが、実施例31~33では、比較例4よりも電界強度1MV/cmにおけるリーク電流密度が小さかった。電界強度を大きくした、電界強度2MV/cmにおけるリーク電流密度は、実施例30~33では、比較例4よりもリーク電流密度が小さかった。したがって、実施例30~33(特に、実施例31~実施例33)に係る半導体用膜組成物を用いることで、電気特性に優れた膜が得られることが示された。
〔実施例34〕
化合物(A)の3-アミノプロピルトリエトキシシラン(3APTES)は、水に溶解して50質量%水溶液とした後、一晩静置した物を組成物調製に用いた。加水分解後の重量平均分子量(Mw)は、430であった。
架橋剤(B)であるPMAに塩基(C-2)であるアンモニアと水を混合させて、PMA(14質量%)とアンモニアとの混合溶液とした。アンモニアは、架橋剤(B)中のカルボキシ基の数に対する塩基(C-2)中の窒素原子の数の比率(N/COOH)が1.5となるように添加した。
3APTES水溶液に、PMAとアンモニアとの混合溶液、及び水を表7に示す濃度となるように混合して、半導体用膜組成物(溶液13)を調製した。
化合物(A)の3-アミノプロピルトリエトキシシラン(3APTES)は、水に溶解して50質量%水溶液とした後、一晩静置した物を組成物調製に用いた。加水分解後の重量平均分子量(Mw)は、430であった。
架橋剤(B)である124BTCに塩基(C-2)であるアンモニアと水を混合させて、124BTC(14質量%)とアンモニアとの混合溶液とした。アンモニアは、架橋剤(B)中のカルボキシ基の数に対する塩基(C-2)中の窒素原子の数の比率(N/COOH)が1.5となるように添加した。
3APTES水溶液に、124BTCとアンモニアとの混合溶液、及び水を表7に示す濃度となるように混合して、半導体用膜組成物(溶液14)を調製した。
化合物(A)の3-アミノプロピルトリエトキシシラン(3APTES)は、水に溶解して50質量%水溶液とした後、一晩静置した物を組成物調製に用いた。加水分解後の重量平均分子量(Mw)は、430であった。
架橋剤(B)である135BTCに塩基(C-2)であるアンモニアと水を混合させて、135BTC(14質量%)とアンモニアとの混合溶液とした。アンモニアは、架橋剤(B)中のカルボキシ基の数に対する塩基(C-2)中の窒素原子の数の比率(N/COOH)が1.5となるように添加した。
3APTES水溶液に、135BTCとアンモニアとの混合溶液、及び水を表7に示す濃度となるように混合して、半導体用膜組成物(溶液15)を調製した。
化合物(A)である3-アミノプロピルジエトキシメチルシラン(3APDES)の溶液を、1-プロパノール28gに3APDES2.0gを加えて、ギ酸(FA)水溶液(8.8質量%)を10g滴下し、室温で一時間撹拌後、60℃ウォーターバス中で一時間加熱して調製した。
3APDES溶液に、架橋剤(B)である1-プロパノールハーフエステルピロメリット酸(1PrhePMA;1-propanol half ester PMA)の1-プロパノール溶液、1-プロパノール、及び水を表7に示す組成となるように混合して、半導体用膜組成物(溶液16)を調製した。
表面にシリカが存在しているシリコンウェハを準備し、このシリコンウェハを、スピンコーターの上にのせ、半導体用膜組成物(溶液13~16)を10秒間一定速度で1.0mL滴下し、13秒間保持した後、このシリコンウェハを2000rpmで1秒間回転させ、さらに600rpmで30秒間回転させた後、2000rpmで10秒間回転させて乾燥させた。
以上により、シリコンウェハ上に、ポリマー層を形成し、シリコンウェハとポリマー層とが積層された構造の積層体(以下、「試料(ポリマー/Si)」ともいう)を得た。
積層体の銅膜側表面に、0.2cm角の正方形マスを5×5個カッターで形成後、スコッチテープ(3M社製 No.56)を貼り付けた後、一気に引きはがし、剥がれたマスの数を計測した。
結果を表7に示す。
PMA[2.0]、124BTC[1.5]、135BTC[1.0]、及び1PrhePMA[0.7]におけるカッコ内の数値は、化合物(A)中の全窒素原子の数に対する、PMA、124BTC、135BTC、及び1PrhePMA中のカルボキシ基の数の比率(COOH/N)を表している。
NH3<1.5>のカッコ内の数値は、架橋剤(B)中のカルボキシ基の数に対するNH3中の窒素原子の数の比率(N/COOH)を表している。
1PrOH(88質量%)におけるカッコ内の濃度は、組成物中における1PrOHの濃度を表している。
(試料の作製)
シリコン基板上にめっきにて銅膜を100nm成膜し、この銅膜面をヘリウムプラズマ処理でクリーニングした基板を用意した。プラズマ処理後の銅膜面上に、<シリコン(Si)基板との密着性評価>と同様に、シール層(ポリマー層)を形成した。
以上により、銅上に、ポリマー層を形成し、銅とポリマー層とが積層された構造の積層体(以下、「試料(ポリマー/Cu)」ともいう)を得た。
積層体の銅膜側表面に、0.2cm角の正方形マスを5×5個カッターで形成後、スコッチテープ(3M社製 No.56)を貼り付けた後、一気に引きはがし、剥がれたマスの数を計測した。
結果を表7に示す。
〔比較例5〕
架橋剤(B)であるPMAに塩基(C-2)であるアンモニアと水とを混合させて、PMA(14質量%)とアンモニアとの混合溶液とした。アンモニアは、架橋剤(B)中のカルボキシ基の数に対する塩基(C-2)中の窒素原子の数の比率(N/COOH)が1.5となるように添加した。
架橋剤(B)である124BTCに塩基(C-2)であるアンモニアと水とを混合させて、124BTC(14質量%)とアンモニアとの混合溶液とした。アンモニアは、架橋剤(B)中のカルボキシ基の数に対する塩基(C-2)中の窒素原子の数の比率(N/COOH)が1.5となるように添加した。
架橋剤(B)である135BTCに塩基(C-2)であるアンモニアと水とを混合させて、135BTC(14質量%)とアンモニアとの混合溶液とした。アンモニアは、架橋剤(B)中のカルボキシ基の数に対する塩基(C-2)中の窒素原子の数の比率(N/COOH)が1.5となるように添加した。
BPEI_2水溶液(1.5質量%)を用意した。
架橋剤(B)であるPMAに塩基(C-2)であるアンモニアと水とを混合させて、PMAとアンモニアとの混合溶液とした。
BPEI_2水溶液、PMAとアンモニアとの混合溶液、及び水を表8に示す濃度となるように混合して、半導体用膜組成物(溶液17)を調製した。
架橋剤(B)である124BTCに塩基(C-2)であるアンモニアと水とを混合させて、124BTCとアンモニアとの混合溶液とした。
BPEI_2水溶液、124BTCとアンモニアとの混合溶液、及び水を表8に示す濃度となるように混合して、半導体用膜組成物(溶液18)を調製した。
架橋剤(B)である135BTCに塩基(C-2)であるアンモニアと水とを混合させて、135BTCとアンモニアとの混合溶液とした。
BPEI_2水溶液、135BTCとアンモニアとの混合溶液、及び水を表8に示す濃度となるように混合して、半導体用膜組成物(溶液19)を調製した。
化合物(A)の3-アミノプロピルトリエトキシシラン(3APTES)は、水に溶解して50質量%水溶液とした後、一晩静置した物を組成物調製に用いた。加水分解後の重量平均分子量(Mw)は、430であった。次に、水を加えて10質量%とした3APTES水溶液を用意した。
実施例34~36で調製した半導体用膜組成物(溶液13~15)を用意した。
化合物(A)の3-アミノプロピルジエトキシメチルシラン(3APDES)は、水に溶解して50質量%水溶液とした後、一晩静置した。加水分解後の重量平均分子量(Mw)は、230であった。
実施例20で調製した半導体用膜組成物(溶液3)を用意した。
化合物(A)である3-アミノプロピルジエトキシメチルシラン(3APDES)の溶液は、1-プロパノール28gに3APDES2.0gを加えて、ギ酸(FA)水溶液(8.8質量%)を10g滴下し、室温で一時間撹拌後、60℃ウォーターバス中で一時間加熱し、次いで、1-プロパノールを10g加えて調製した。
化合物(A)である3-アミノプロピルジエトキシメチルシラン(3APDES)の溶液は、1-プロパノール28gに3APDES2.0gを加えて、ギ酸(FA)水溶液(8.8質量%)を10g滴下し、室温で一時間撹拌後、60℃ウォーターバス中で一時間加熱して調製した。
3APDES溶液に、架橋剤(B)である1Prhe124BTCの1-プロパノール溶液、1-プロパノール、及び水を表8に示す組成となるように混合して、半導体用膜組成物(溶液20)を調製した。
ポリマーの分解温度評価は、以下の方法で行った。
実施例38~42、比較例5~14で用意した各試料100mgを試料カップに入れ、熱重量測定装置(島津製作所社製:DTG-60(型番))を用いて、窒素雰囲気で30℃から550℃まで昇温速度30℃/分で加熱し、各温度での質量を測定した。300℃における質量から10%減少したときの温度を表8に示す。
PMA(14質量%)、124BTC(14質量%)、及び135BTC(14質量%)におけるカッコ内の濃度は、組成物中におけるPMA、124BTC及び135BTCの濃度を表している。
PMA[1.8]、124BTC[1.35]、135BTC[0.9]、PMA[2.0]、124BTC[1.5]、135BTC[1.0]、eheOPDA[1.0]、及び1Prhe124BTC[1.15]におけるカッコ内の数値は、化合物(A)中の全窒素原子の数に対する、PMA、124BTC、135BTC、eheOPDA及び1Prhe124BTC中のカルボキシ基の数の比率(COOH/N)を表している。
NH3<1.5>のカッコ内の数値は、架橋剤(B)中のカルボキシ基の数に対するNH3中の窒素原子の数の比率(N/COOH)を表している。
FAのカッコ内の数値である1.83は、は、化合物(A)中の全窒素原子の数に対するFA中のカルボキシ基の数の比率(COOH/N)を表している。
1PrOH(33質量%)、1PrOH(76質量%)、1PrOH(88質量%)、EtOH(29質量%)におけるカッコ内の濃度は、組成物中における1PrOH及びEtOHの濃度を表している。
表8中に示されるように、Si-O結合を有する化合物(A)及び架橋剤(B)を含有する実施例38~42の組成物から得られる固体は、架橋剤(B)を含有しない比較例12~14の組成物から得られる固体、及びSi-O結合を有さない脂肪族アミン及び架橋剤(B)を含有する比較例9~11の組成物から得られる固体に比べ、高い分解温度を有していた。
この結果から、化合物(A)及び架橋剤(B)を含有する実施例38~42の組成物を用いることで、分解温度が高いポリマー膜を形成できることが示された。
〔比較例15〕
氷水で5℃以下に冷やしたウォーターバスに入れたポリ溶液に、ピロメリット酸二無水物(PMDA)1.14gを添加し、エタノール24gを添加し、3-アミノプロピルジエトキシメチルシラン(3APDES)を2.18gゆっくりと滴下した後、2時間撹拌した。全ての化合物が溶解したのを確認後、水を3g添加し、保存安定性評価用組成物(溶液21)を得た。溶液21中ではPMDAと3APDESとのアミック酸が形成されていると推察される。
実施例34~36で調製した半導体用膜組成物(溶液13~15)を用意した。
溶液の保存安定性評価は、以下の方法で行った。
溶液13~15、21を容量100mLのポリエチレン製密閉容器に20mL~50mL入れ、5℃に保持された冷蔵庫内に、冷蔵庫の扉を開けずに20日間保持した。20日後、冷蔵庫から取り出し、室温に戻した後に目視にて溶液中の沈殿物の形成、白濁等を確認した。沈殿物の形成及び白濁がいずれも観察されなかった場合をA、沈殿物の形成及び白濁の少なくとも一方が観察された場合をBとした。
評価結果を表9に示す。
実施例43~45の溶液13~15は、さらに室温で10週間保管後にも溶液中の沈殿物、白濁等の異常は確認されなかった。
このことから、実施例43~45の溶液13~15は、化合物(A)と架橋剤(B)が溶液中で凝集すること無く分散されていると思われ、保存安定性に優れることが示された。
〔比較例16〕
架橋剤(B)であるPMAに塩基(C-2)であるアンモニアと水とを混合させて、PMAとアンモニアとの混合溶液とした。
BPEI_2水溶液、PMAとアンモニアとの混合溶液、及び水を表10に示す濃度となるように混合して、半導体用膜組成物(溶液22)を調製した。
化合物(A)の3-アミノプロピルジエトキシメチルシラン(3APDES)は、水に溶解して50質量%水溶液とした後、一晩静置した物を組成物調製に用いた。加水分解後の重量平均分子量(Mw)は、230であった。
架橋剤(B)である135BTCに塩基(C-2)であるアンモニアと水とを混合させて、135BTC(14質量%)とアンモニアとの混合溶液とした。
次いで、3APDES水溶液、135BTCとアンモニアとの混合溶液、及び水を表10に示す濃度となるように混合して、半導体用膜組成物(溶液23)を調製した。
化合物(A)である3-アミノプロピルジエトキシメチルシラン(3APDES)の溶液を、1-プロパノール28gに3APDES2.0gを加えて、ギ酸(FA)水溶液(8.8質量%)を10g滴下し、室温で一時間撹拌後、60℃ウォーターバス中で一時間加熱して調製した。
3APDES溶液に、架橋剤(B)である1-プロピルハーフエステルオキシジフタル酸(1PrheOPDA)の1-プロパノール溶液、1-プロパノール、及び水を表10に示す組成となるように混合して、半導体用膜組成物(溶液24)を調製した。
実施例29で調製した半導体用膜組成物(溶液10)を用意した。
表面にシリカが存在しているシリコンウェハを準備し、このシリコンウェハをスピンコーターの上にのせ、半導体用膜組成物を10秒間一定速度で0.5mL滴下し、13秒間保持した後、このシリコンウェハを2000rpmで1秒間回転させ、さらに600rpmで30秒間回転させた後、2000rpmで10秒間回転させて乾燥させた。
以上により、シリコンウェハ上にポリマー層を形成し、シリコンウェハとポリマー層とが積層された構造の積層体(以下、「試料(ポリマー/Si)」ともいう)を得た。
上記試料(ポリマー/Si)をホットプレート上に、シリコンウェハ面とホットプレートとが接触するように設置し、大気雰囲気下で、100℃のソフトベーク温度で60秒間ソフトベーク(加熱処理)した。更に窒素雰囲気中300℃で10分間、および400℃で10分間連続して加熱を行った。
上記の方法でポリマー膜を形成したシリコンウェハをチャンバーに入れ、チャンバー内を5×10-6Torr(6.7×10-4Pa)まで真空引きした後、酸素を50sccm(約8.3×10-7m3/s)でチャンバーに流し、チャンバー内圧力を0.15Torr(20Pa)に調整した後、100Wの酸素プラズマを照射した。
PMA[1.42]、135BTC[1.0]、1PrheOPDA[0.7]、及びeheOPDA[1.0]におけるカッコ内の数値は、化合物(A)中の全窒素原子の数に対する、PMA、135BTC、1PrheOPDA、及びeheOPDA中のカルボキシ基の数の比率(COOH/N)を表している。
FAのカッコ内の数値である1.5は、化合物(A)中の全窒素原子の数に対するFA中のカルボキシ基の数の比率(COOH/N)を表している。
NH3<1.5>のカッコ内の数値は、架橋剤(B)中のカルボキシ基の数に対するNH3中の窒素原子の数の比率(N/COOH)を表している。
1PrOH(85質量%)、1PrOH(37質量%)、EtOH(59質量%)におけるカッコ内の濃度は、組成物中における1PrOH及びEtOHの濃度を表している。
同様に、5分エッチング後の結果より、化合物(A)及び架橋剤(B)を含有する実施例47、48の組成物を用いて得られたSi-O含有膜は、脂肪族アミン及び架橋剤(B)を含有する比較例16の組成物を用いて得られた有機膜よりも膜の減少量(すなわち、エッチング速度)が小さかった。
以上のように、実施例46~48の半導体用膜組成物を用いて得られたSi-O含有膜は、有機膜(比較例16)よりも酸素プラズマによるエッチング速度が小さいこと、すなわち、エッチング選択性に優れることがわかった。
また、5分エッチング後の結果より、化合物(A)である3APDES及び架橋剤(B)である1PrheOPDAを含有する実施例47の半導体用膜組成物を用いて得られたSi-O含有膜は、化合物(A)であるBATDS及び架橋剤(B)であるeheOPDAを含有する実施例48の半導体用膜組成物を用いて得られたSi-O含有膜よりも膜の減少量(すなわち、エッチング速度)が小さかった。
本明細書に記載された全ての文献、特許出願、及び技術規格は、個々の文献、特許出願、及び技術規格が参照により取り込まれることが具体的かつ個々に記された場合と同程度に、本明細書中に参照により取り込まれる。
Claims (16)
- 1級窒素原子及び2級窒素原子の少なくとも1つを含むカチオン性官能基とSi-O結合とを有する化合物(A)と、
分子内に-C(=O)OX基(Xは、水素原子又は炭素数1以上6以下のアルキル基である)を3つ以上有し、3つ以上の-C(=O)OX基のうち、1つ以上6つ以下が-C(=O)OH基であり、重量平均分子量が200以上600以下である架橋剤(B)と、
極性溶媒(D)と、
を含む、半導体用膜組成物。 - 1級窒素原子及び2級窒素原子の少なくとも1つを含むカチオン性官能基とSi-O結合とを有し、重量平均分子量が130以上10000以下である化合物(A)と、
分子内に-C(=O)OX基(Xは、水素原子又は炭素数1以上6以下のアルキル基である)を3つ以上有し、3つ以上の-C(=O)OX基のうち、1つ以上6つ以下が-C(=O)OH基であり、重量平均分子量が200以上600以下である架橋剤(B)と、
極性溶媒(D)と、
を含む、半導体用膜組成物。 - さらに、前記架橋剤(B)は、分子内に環構造を有する、請求項1又は請求項2に記載の半導体用膜組成物。
- 前記環構造は、ベンゼン環及びナフタレン環の少なくとも一方である、請求項3に記載の半導体用膜組成物。
- さらに、前記架橋剤(B)は、前記3つ以上の-C(=O)OX基において、少なくとも1つのXが炭素数1以上6以下のアルキル基である、請求項1~請求項4のいずれか1項に記載の半導体用膜組成物。
- カルボキシ基を有する重量平均分子量46以上195以下の酸(C-1)及び窒素原子を有する重量平均分子量17以上120以下の塩基(C-2)からなる群より選ばれる少なくとも1種の添加剤(C)をさらに含む、請求項1~請求項5のいずれか1項に記載の半導体用膜組成物。
- 重量平均分子量1万以上40万以下の脂肪族アミン及び分子内に環構造を有する重量平均分子量90以上600以下のアミン化合物からなる群より選ばれる少なくとも1種を含む、請求項1~請求項6のいずれか1項に記載の半導体用膜組成物。
- 基板に形成された凹部の充填材料に用いられる、請求項1~請求項7のいずれか1項に記載の半導体用膜組成物。
- 多層レジスト法に用いられる、請求項1~請求項7のいずれか1項に記載の半導体用膜組成物。
- 請求項1~請求項9のいずれか1項に記載の半導体用膜組成物を製造する製造方法であって、
前記化合物(A)と、前記架橋剤(B)と、を混合する混合工程を含む半導体用膜組成物の製造方法。 - 前記混合工程は、カルボキシ基を有する重量平均分子量46以上195以下の酸(C-1)と前記化合物(A)との混合物と、前記架橋剤(B)と、を混合する工程である請求項10に記載の半導体用膜組成物の製造方法。
- 前記混合工程は、窒素原子を有する重量平均分子量17以上120以下の塩基(C-2)と前記架橋剤(B)との混合物と、前記化合物(A)と、を混合する工程である請求項10に記載の半導体用膜組成物の製造方法。
- 請求項1~請求項9のいずれか1項に記載の半導体用膜組成物を用いて半導体用部材を製造する製造方法であって、
前記半導体用膜組成物を基板に付与する付与工程と、
前記半導体用膜組成物が付与された前記基板を温度250℃以上425℃以下の条件で加熱する加熱工程を有する、半導体用部材の製造方法。 - 請求項1~請求項7のいずれか1項に記載の半導体用膜組成物を用いて半導体用工程材を製造する製造方法であって、
前記半導体用膜組成物を基板に付与する付与工程と、
前記半導体用膜組成物が付与された前記基板を温度250℃以上425℃以下の条件で加熱する加熱工程を有する、半導体用工程材の製造方法。 - 基板と、
1級窒素原子及び2級窒素原子の少なくとも1つを含むカチオン性官能基とSi-O結合とを有する重量平均分子量が130以上10000以下である化合物(A)、及び分子内に-C(=O)OX基(Xは、水素原子又は炭素数1以上6以下のアルキル基である)を3つ以上有し、3つ以上の-C(=O)OX基のうち、1つ以上6つ以下が-C(=O)OH基であり、重量平均分子量が200以上600以下である架橋剤(B)の反応物と、
を備える、半導体装置。 - 前記反応物は、アミド結合及びイミド結合の少なくとも一方を有する、請求項15に記載の半導体装置。
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| SG11201804073UA SG11201804073UA (en) | 2015-11-16 | 2016-11-16 | Semiconductor film composition, method for manufacturing semiconductor film composition, method for manufacturing semiconductor member, method for manufacturing processing material for semiconductor, and semiconductor device |
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| JP2017551913A JP6437134B2 (ja) | 2015-11-16 | 2016-11-16 | 半導体装置用の膜を生成するための組成物、半導体装置用の膜を生成するための組成物の製造方法、半導体用部材の製造方法、半導体用工程材の製造方法及び半導体装置 |
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| PCT/JP2016/084009 Ceased WO2017086361A1 (ja) | 2015-11-16 | 2016-11-16 | 半導体用膜組成物、半導体用膜組成物の製造方法、半導体用部材の製造方法、半導体用工程材の製造方法及び半導体装置 |
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