WO2017141492A1 - 自己組織化用高分子材料、自己組織化膜、自己組織化膜の製造方法、パターン及びパターンの形成方法 - Google Patents
自己組織化用高分子材料、自己組織化膜、自己組織化膜の製造方法、パターン及びパターンの形成方法 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
- C08F297/02—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
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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
- C09D153/00—Coating compositions based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2353/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
Definitions
- the present invention relates to a polymer material for self-assembly, a self-assembled film, a method for producing a self-assembled film, a pattern, and a method for forming a pattern.
- the present invention relates to a polymer material, a self-assembled film, a method for producing a self-assembled film, a pattern, and a pattern forming method.
- Japanese Patent Laid-Open No. 2005-7244 Japanese Patent Laid-Open No. 2005-8701 Japanese Patent Application Laid-Open No. 2005-8882 JP 2003-218383 A JP 2010-269304 A JP 2011-129874 A JP 2012-108369 A
- the present invention has been made in view of such circumstances, and can reduce defects based on microphase separation failure sites and can form fine and fine patterns, and a self-organizing polymer material, It aims at providing the manufacturing method of a film
- the present inventors have found that a multi-block more than a triblock copolymer formed by linking a first polymer block mainly composed of a structural unit having a specific structure and a second polymer block.
- the block copolymer makes it possible to maintain polymer physical properties while maintaining a fine microphase separation structure, and can easily form a pattern of 10 nm or less, reducing defects based on microphase separation failure sites.
- the inventors have found that fine and minute repetitive patterns can be formed, and have completed the present invention.
- the polymer material for self-assembly of the present invention includes a first polymer block including a structural unit represented by the following general formula (1) and a first polymer block including a structural unit represented by the following general formula (2). It contains a multi-block copolymer formed by linking two polymer blocks.
- m is an integer of 1 or more and 1000 or less.
- R 1 represents a hydrogen atom and an alkyl group having 1 to 3 carbon atoms.
- R 2 represents an alkyl group having 1 to 5 carbon atoms.
- L represents 1 to 1000. The following integers.
- the first polymer block containing the structural unit represented by the general formula (1) and the general formula (2) having a polarity different from that of the first polymer block are used. Since the second polymer block including the structural unit is repeated, the repulsive force between the first polymer block and the second polymer block is promoted. Moreover, since the structural unit represented by the general formula (1) and the general formula (2) has a functional group at the para position of the polymer chain, the interaction between the first polymer block and the second polymer block. And the ⁇ parameter is improved. Furthermore, since the structural unit represented by the general formula (2) contains a silicon (Si) atom, the interaction between the first polymer block and the second polymer block is improved, and the ⁇ parameter is increased.
- Si silicon
- Etching resistance is improved.
- the microphase separation property is improved and defects based on the microphase separation failure can be reduced, and a finer repetitive pattern can be formed. Therefore, it is possible to realize a self-organizing polymer material that can reduce defects based on microphase separation failure sites and can form fine and minute repeating patterns.
- the multiblock copolymer is preferably a triblock copolymer or a tetrablock copolymer.
- the multiblock copolymer is preferably a tetrablock copolymer.
- the multi-block copolymer is preferably copolymerized by living anionic polymerization.
- the multiblock copolymer preferably has a number average molecular weight of 3,000 or more and 50,000 or less.
- the self-assembled film of the present invention is obtained by using the above-described polymer material for self-assembly.
- a top coat agent is preferably applied to the surface.
- the method for producing a self-assembled film of the present invention is characterized in that a self-assembled film is formed using the above-described polymer material for self-assembly.
- the method for producing a self-assembled film of the present invention preferably includes a step of applying a topcoat agent on the self-assembled film.
- the pattern of the present invention is characterized in that the self-assembled film is etched.
- the pattern forming method of the present invention includes a step of etching the self-assembled film to form a pattern.
- part can be reduced, and also the polymer material for self-organization which can form a fine and minute pattern, a self-assembled film, the manufacturing method of a self-assembled film, a pattern And a pattern forming method.
- FIG. 1 is a diagram showing a microdomain structure of a polymer material containing two polymer components.
- FIG. 2A is a diagram showing a microdomain structure of a spherical structure.
- FIG. 2B is a diagram showing a microdomain structure of a cylinder structure.
- FIG. 2C is a diagram showing a microdomain structure of a gyroidal structure.
- FIG. 2D is a diagram showing a microdomain structure of a lamellar structure.
- FIG. 3 is a schematic diagram of molecular chains of a block copolymer.
- FIG. 4 is a diagram showing an example of a multi-block copolymer.
- FIG. 1 is a diagram showing a microdomain structure of a polymer material containing two polymer components.
- FIG. 2A is a diagram showing a microdomain structure of a spherical structure.
- FIG. 2B is a diagram showing a microdomain structure of a cylinder structure.
- FIG. 5A is a schematic diagram of a lamellar structure as an example of a micro layer separation structure formed by a multi-block copolymer.
- FIG. 5B is a schematic diagram of a lamellar structure as an example of a micro layer separation structure formed by a multi-block copolymer.
- FIG. 5C is a schematic diagram of a lamellar structure as an example of a micro layer separation structure formed by a multi-block copolymer.
- FIG. 5D is a schematic diagram of a lamellar structure as an example of a micro layer separation structure formed by a multi-block copolymer.
- FIG. 5A is a schematic diagram of a lamellar structure as an example of a micro layer separation structure formed by a multi-block copolymer.
- FIG. 5B is a schematic diagram of a lamellar structure as an example of a micro layer separation structure formed by a multi-block copolymer.
- FIG. 5C is a schematic
- FIG. 6A is a schematic diagram of a lamellar structure as an example of a micro layer separation structure formed by a multi-block copolymer.
- FIG. 6B is a schematic diagram of a lamellar structure as an example of a micro layer separation structure formed by a multi-block copolymer.
- FIG. 6C is a schematic diagram of a lamellar structure as an example of a micro layer separation structure formed by a multi-block copolymer.
- FIG. 6D is a schematic diagram of a lamellar structure as an example of a micro layer separation structure formed by a multi-block copolymer.
- FIG. 7 is a diagram showing a GPC chart of the tetrablock copolymer (2).
- FIG. 7 is a diagram showing a GPC chart of the tetrablock copolymer (2).
- FIG. 8 is a graph showing the results of 1 H-NMR measurement of the tetrablock copolymer (1).
- FIG. 9 is a diagram showing the measurement results of 1 H-NMR of the tetrablock copolymer (2).
- FIG. 10 is a diagram showing SAXS observation results of a pattern obtained using the triblock copolymer (2).
- DSA Inductive self-assembly
- a multi-block copolymer such as a diblock copolymer linked by a covalent bond is a volume fraction between two polymer components when the same polymer component aggregates between molecules to cause microphase separation.
- the interface curvature at the time of molecular assembly changes according to the rate ratio (f), and the microdomain structure changes.
- FIG. 1 is a diagram showing a microdomain structure of a polymer material containing two polymer components
- FIG. 2A is a diagram showing a microdomain structure of a spherical structure
- FIG. 2B is a microdomain of a cylinder structure
- FIG. 2C is a diagram showing a microdomain structure of a gyroidal structure
- FIG. 2D is a diagram showing a microdomain structure of a lamellar structure.
- FIG. 3 is a schematic diagram of molecular chains of a block copolymer.
- the vertical axis represents the product ⁇ N of the interaction parameter ⁇ and the polymerization degree N of the polymer
- the horizontal axis represents the first component and the second polymer block 12 constituting the first polymer block 11.
- the composition ratio f (the first component / the second component) with the second component that constitutes is shown.
- the microdomain structure of the polymer material containing the two polymer components has the second polymer block 12 in the region S of FIG. 1 as the proportion of the first component increases.
- the first polymer block 11 is a finely dispersed spherical structure 1A (see FIG. 2A).
- a regular morphology that gives a lamellar structure 1D in which the second polymer block 12 and the first polymer block 11 are laminated in layers is given.
- the composition of the first polymer block 11 and the second polymer block 12 of the block copolymer is maintained and the molecular weight is reduced.
- Table 1 shows, as an example of the polymer material, the relationship between the molecular weight of polyethylene and the physical properties such as boiling point, melting point, and appearance. As shown in Table 1, polyethylene has a lower molecular weight and a lower boiling point as the degree of polymerization (n) decreases.
- polyethylene becomes waxy and brittle solid in an oligomer region having a molecular weight of 3000 or less, and does not satisfy basic polymer properties such as a solid, a high glass transition temperature, and a strong film-forming ability.
- basic polymer properties such as a solid, a high glass transition temperature, and a strong film-forming ability.
- the molecular weight of the block copolymer when the molecular weight of the block copolymer is reduced in order to obtain a fine micro-layer separation structure, it eventually reaches a region where the micro-layer separation does not occur, and becomes an oligomer or a region having a molecular weight equal to or less than that of the oligomer. The properties as a material are lost, and the physical properties as a polymer cannot be obtained. For this reason, it turns out that a fine micro layer separation structure cannot be obtained only by making the molecular weight of the 1st polymer block 11 and the 2nd polymer block 12 small.
- FIG. 4 is a diagram showing an example of a multi-block copolymer.
- the multi-block copolymer includes a diblock copolymer in which a first polymer block 11 and a second polymer block 12 are connected, a first polymer block 11 and a second double block.
- the triblock copolymer includes a third polymer block other than the first polymer block 11, the second polymer block 12, the first polymer block 11, and the second polymer block 12.
- the united block may be connected.
- the total molecular weight can be increased. Therefore, even if it is a case where the molecular weight of the 1st polymer block 11 and the 2nd polymer block 12 is made small, the polymeric material for self-organization can provide a polymer physical property.
- FIGS. 5A to 5D and FIGS. 6A to 6D are schematic views of a lamellar structure as an example of a micro-layer separation structure formed by a multi-block copolymer.
- the structure that the block chain of the diblock copolymer in which the first polymer block 11 and the second polymer block 12 are connected can take in the domain is the first polymer block. 11 and one of the structures penetrating the interface 14 between the domains of the second polymer block 12.
- FIGS. 5B and 6B a structure in which a block chain in which the first polymer block 11, the second polymer block 12, and the first polymer block 11 of the triblock copolymer are connected can be taken in the domain.
- the structure that can be obtained is one type of structure that penetrates the interface 14 of the domains of the first polymer block 11, the second polymer block 12, and the third polymer block 13.
- the structure that can be taken in the domain includes a structure penetrating the interface 14 of the domains of the first polymer block 11, the second polymer block 12, the first polymer block 11-1, and the second polymer block 12-1.
- 3 types become. It is known that the mechanical strength of such a block copolymer is generally higher in a structure in which a polymer chain penetrates many domains as shown in the upper part of FIGS. 6B and 6D (reference: Macromolecules, Vol. 16, No. 1, 1983).
- the loop structure shown in the lower part of FIG. 6B and FIG. 6D should have fewer loop structures, and a multi-block copolymer such as the triblock copolymer shown in the upper part of FIG. Higher strength than diblock copolymer.
- the styrene-methyl methacrylate diblock copolymer used in the conventional DSA technology does not form a micro-layer separation structure from around 14 nm, and can form lines / spaces and holes of 10 nm or less. Have difficulty.
- diblock copolymers composed of block chains other than styrene-methyl methacrylate have been studied, but in many cases, the ability to form microphase separation is lost in the vicinity of 10 nm or less. In some cases, the phase structure cannot be obtained, and defects due to poor phase structure formation may occur.
- the present inventors paid attention to the characteristics of the above-described polymer material, and as a result of intensive studies to solve the above problems, the above problems can be solved by making each block chain of the diblock copolymer multi-block. Focused on. That is, the present inventors use a multiblock copolymer that is equal to or more than a triblock polymer including a first polymer block 11 including a first structural unit and a second polymer block 12 including a second structural unit. Thus, it has been found that the polymer physical properties can be maintained while maintaining a fine microphase separation structure.
- the present inventors have added the first polymer block 11 (or the third polymer block 13) as a new third component to the multi-block copolymer, thereby increasing the total molecular weight.
- a type (or ABC type) triblock copolymer, or an ABAB type (or ABCA type) tetrablock copolymer further added with a third polymer block and a fourth polymer block a finer micro-block copolymer is used. It has been found that the polymer properties can be maintained while maintaining the phase separation structure.
- the inventors can easily form L / S and CH of 10 nm or less by the above-described multi-block copolymer, reduce defects based on microphase separation failure sites, and form fine and minute repetitive patterns. The present inventors have found that the present invention can be accomplished and have completed the present invention.
- the polymer material for self-assembly according to the present invention is mainly composed of a first polymer block mainly composed of a structural unit containing the following general formula (1) and a structural unit represented by the following general formula (2). It contains a multiblock copolymer that is equal to or more than a triblock copolymer formed by copolymerization with a second polymer block.
- m is an integer of 1 or more and 1000 or less.
- R 1 represents a hydrogen atom and an alkyl group having 1 to 3 carbon atoms.
- R 2 represents an alkyl group having 1 to 5 carbon atoms.
- L represents 1 to 1000. The following integers.
- the first polymer block including the structural unit represented by the general formula (1) and the first polymer block including the structural unit represented by the general formula (2) By repeating the second polymer block having a different polarity from each other, the mutual repulsive force is promoted. And since the structural unit represented by General formula (1) and General formula (2) has a functional group in the para position of a polymer chain, interaction between a 1st polymer block and a 2nd polymer block And the ⁇ parameter is improved. Furthermore, since the structural unit represented by the general formula (2) contains a silicon (Si) atom, the interaction between the first polymer block and the second polymer block is improved, and the ⁇ parameter is increased. Etching resistance is improved.
- the microphase separation property can be improved and defects based on the microphase separation failure can be reduced, so that a finer repetitive pattern can be formed. Therefore, the polymer material for self-assembly can reduce the defects based on the microphase separation failure sites, and can realize the polymer material for self-assembly that can form fine and minute repetitive patterns.
- R 1 in the general formula (2) is not particularly limited as long as it is a hydrogen atom and an alkyl group having 1 to 3 carbon atoms.
- the alkyl group having 1 to 3 carbon atoms include a methyl group, an ethyl group, an n-propyl group, and an isopropyl group.
- R 1 a hydrogen atom or a methyl group is preferable, and a hydrogen atom is more preferable, from the viewpoint that defects based on a poor microphase separation site can be reduced and a fine and minute repetitive pattern can be formed.
- R 2 in the general formula (2) is not particularly limited as long as it is an alkyl group having 1 to 5 carbon atoms.
- the alkyl group having 1 to 5 carbon atoms include methyl group, ethyl group, n-propyl group, isopropyl, n-butyl group, s-butyl group, t-butyl group, n-pentyl group, and neopentyl group. Is mentioned.
- the three R 2 in the general formula (2) may be the same or different from each other.
- R 2 a methyl group, an ethyl group, an n-propyl group, and isopropyl are preferable from the viewpoint of reducing defects based on a microphase separation failure site and forming a fine and minute repeating pattern.
- a methyl group and an ethyl group are more preferable, and a methyl group is still more preferable.
- the first polymer block of the multi-block copolymer As the first polymer block of the multi-block copolymer, the first polymer block A formed by repeatedly polymerizing the same structural unit represented by the general formula (1), or the general formula (1) And a first polymer block B obtained by repeatedly polymerizing a structural unit different from the general formula (1) can be used. Further, as the second polymer block of the multi-block copolymer, the second polymer block C formed by repeatedly polymerizing the same structural unit represented by the general formula (2), or the general formula ( The 2nd polymer block D formed by repeatedly superposing
- the triblock copolymer a polymer in which the above-described polymer blocks AD are arbitrarily arranged like ACA, ACB, ADA, and ADB can be used.
- sequence of ACA and ADA is preferable from the viewpoint which can further reduce the defect based on a micro phase separation defect site
- the tetrablock copolymer those arbitrarily arranged such as ACAC, ACBC, ADAD, ADBC can be used.
- ACAC and ADAD are preferable from the viewpoint of reducing defects based on microphase separation failure sites and forming fine and minute repetitive patterns.
- a triblock copolymer may be used, and a tetrablock copolymer may be used.
- the multiblock copolymer more than the pentablock copolymer in which the 1st polymer block and the 2nd polymer block are connected two or more by copolymerization can also be used.
- the triblock copolymer or the tetrablock copolymer is used as the multiblock copolymer from the viewpoint of reducing defects based on the microphase separation failure sites and forming fine and minute repeating patterns.
- a tetrablock copolymer is more preferable.
- a lamellar structure is formed by self-organization
- it is represented by the general formula (1) from the viewpoint of improving the uniformity and regularity of the pattern of the microdomain structure formed by self-organization.
- the structure represented by the above general formula (1) from the viewpoint of improving the uniformity and regularity of the pattern of the microdomain structure formed by self-organization.
- the average number of molecules of the first polymer block and the second polymer block is 10 or more and 1000 from the viewpoint of improving the uniformity and regularity of the pattern of the microdomain structure formed by self-assembly.
- the number is preferably 15 or more and 100 or less, more preferably 20 or more and 50 or less, and still more preferably 25 or more and 40 or less.
- the number average molecular weight (Mn) of the multiblock copolymer is preferably 3,000 or more, more preferably 5,000 or more, from the viewpoint of improving the uniformity and regularity of the pattern of the microdomain structure formed by self-assembly. More preferably, 6,000 or more is further preferable, 100,000 or less is preferable, 50,000 or less is more preferable, and 20,000 or less is more preferable. If the number average molecular weight (Mn) is 3,000 or more, self-assembly proceeds and a self-assembled film in which a microdomain structure is formed is obtained.
- the polymer material for self-organization according to the present invention includes those having a number average molecular weight (Mn) of 10,000 or less within a range in which the effects of the present invention are exhibited.
- the above is preferable, 1.02 or more is more preferable, 1.1 or less is preferable, and 1.06 or less is more preferable. If PDI is 1.0 or more and 1.1 or less, there is almost no mixing of low molecular weight polymer and high molecular weight polymer, so the uniformity and regularity of the pattern of the microdomain structure formed by self-assembly is improved. To do.
- the number average molecular weight (Mn) and PDI described above are measured by a gel permeation chromatography (GPC) method using polystyrene as a standard substance.
- the number average molecular weight by the GPC method is determined using, for example, a GPC measuring apparatus (trade name: HLC-8220 GPC, manufactured by Tosoh Corporation), a column (trade name: GPC column TSKgel Super HZ2000, HZ3000, manufactured by Tosoh Corporation) and a mobile phase (THF). , Measured at a column temperature of 30 ° C., and calculated using a standard polystyrene calibration curve.
- the composition ratio of the multiblock copolymer can be determined by a nuclear magnetic resonance (NMR) method.
- the composition ratio by the NMR method is, for example, an NMR measuring apparatus (trade name “ADVANCE III HD Nano-Bay digital NMR apparatus”, manufactured by Bruker, analysis software: Bruker TopSpin (registered trademark) 3.2, frequency: 500 MHz), temperature 25 It can be measured under the conditions of ° C., solvent (CDCl 3 ), internal standard: tetramethylsilane (TMS), and 128 times of integration.
- NMR nuclear magnetic resonance
- the multiblock copolymer is represented by the first polymer block mainly composed of the structural unit represented by the general formula (1) copolymerized by the living anion polymerization method and the general formula (2).
- a multi-block copolymer with a second polymer block mainly composed of structural units is preferred.
- the polymer compound is copolymerized by living anion polymerization, the PDI can be extremely narrow, and a polymer compound having a desired number average molecular weight can be obtained with high accuracy. This makes it possible to improve the uniformity and regularity of the microdomain structure pattern formed by self-organization.
- the structure represented by the 1st polymer block which mainly has the structural unit represented by the said General formula (1), and the said General formula (2) If it can copolymerize with the 2nd polymer block which has a unit as a main, there will be no restriction
- the polymerization method for obtaining the polymer compound include living anion polymerization, living cation polymerization, living radical polymerization, and coordination polymerization using an organometallic catalyst. Among these, living anionic polymerization is preferred because it has little polymerization deactivation and side reactions and enables living polymerization.
- living anionic polymerization a monomer for polymerization and an organic solvent subjected to deoxidation and dehydration are used.
- organic solvent include hexane, cyclohexane, toluene, benzene, diethyl ether, and tetrahydrofuran.
- living anionic polymerization polymerization is performed by adding a necessary amount of anionic species to these organic solvents and then adding a monomer as needed.
- the anionic species include organic metals such as alkyllithium, alkylmagnesium halide, sodium naphthalene, and alkylated lanthanoid compounds.
- substituted styrene is copolymerized as a monomer, and among these, s-butyllithium and butylmagnesium chloride are preferable as the anionic species.
- the polymerization temperature of the living anionic polymerization is preferably in the range of ⁇ 100 ° C. or more and 50 ° C. or less, and more preferably ⁇ 70 ° C. or more and 40 ° C. or less from the viewpoint of easy control of the polymerization.
- block copolymerization is performed by living anionic polymerization of a substituted styrene monomer protected with a phenolic hydroxyl group such as p- (1-ethoxyethyl) styrene under the above-mentioned conditions.
- a block copolymer is synthesized. This block copolymer can deprotect the phenolic hydroxyl group of the polymer compound obtained using an acid catalyst such as oxalic acid.
- Examples of the protecting group for the phenolic hydroxyl group during polymerization include t-butyl group and trialkylsilyl group in addition to p- (1-ethoxyethyl) styrene.
- it is selectively deprotected by adjusting the acidity during the deprotection reaction and by deprotection reaction under alkaline conditions. It is also possible to obtain a phenolic hydroxyl group.
- the self-assembled film according to the present invention can be obtained by applying the above-described polymer material for self-assembly dissolved in an organic solvent.
- the organic solvent for dissolving the self-assembling polymer material is not particularly limited as long as a self-assembled film can be obtained.
- propylene glycol alkyl ether acetate and alkyl lactate are preferable.
- the propylene glycol alkyl ether acetate include those having an alkyl group having 1 to 4 carbon atoms.
- Examples of such an alkyl group include a methyl group, an ethyl group, a propyl group, and a butyl group. Among these, a methyl group and an ethyl group are preferable.
- propylene glycol alkyl ether acetate there are three types of isomers depending on the combination of substitution positions including 1,2-substituents and 1,3-substituents, but these isomers may be used alone, Two or more isomers may be used in combination.
- Examples of the lactic acid alkyl ester include those having an alkyl group having 1 to 4 carbon atoms.
- Examples of such an alkyl group include a methyl group, an ethyl group, a propyl group, and a butyl group. Among these, a methyl group and an ethyl group are preferable.
- the concentration of the organic solvent for example, when propylene glycol alkyl ether acetate is used, it is preferable that the propylene glycol alkyl ether acetate is 50% by mass or more based on the total mass of the organic solvent. Moreover, when using lactic acid alkylester, it is preferable to set it as 50 mass% or more with respect to the total mass of an organic solvent.
- the total amount of the mixed solvent is preferably 50% by mass or more based on the total mass of the organic solvent. .
- this mixed solvent it is preferable to make the ratio of propylene glycol alkyl ether acetate 60 mass% or more and 95 mass% or less, and lactate alkyl ester 5 mass% or more and 40 mass% or less.
- the propylene glycol alkyl ether acetate content is 60% by mass or more, the coating property of the self-organizing polymer material is improved, and when it is 95% by mass or less, the solubility of the self-organizing polymer material is improved.
- the solution of the organic solvent for the self-assembling polymer material is not particularly limited as long as it is a concentration at which a self-assembled film can be obtained by a conventionally known film forming method.
- the organic solvent is preferably 5000 parts by mass or more and 50000 parts by mass or less, and more preferably 7000 parts by mass or more and 30000 parts by mass or less with respect to parts by mass.
- the coating method of the polymer material for self-assembly is not particularly limited as long as a self-assembled film can be obtained.
- spin coating method for example, spin coating method, dipping method, flexographic printing method, ink jet printing method, spraying method, potting And screen printing.
- a topcoat agent may be applied on the self-assembled film.
- the topcoat agent include a polyester topcoat agent, a polyamide topcoat agent, a polyurethane topcoat agent, an epoxy topcoat agent, a phenol topcoat agent, a (meth) acrylic topcoat agent, and polyvinyl acetate.
- a polyolefin topcoat agent such as a polyethylene topcoat agent, a polyethylene aly polypropylene, and a cellulose topcoat agent.
- the coating amount (in terms of solid content) of the topcoat agent is preferably 3 g / m 2 or more and 7 g / m 2 or less.
- the topcoat agent can be applied onto the self-assembled film by a conventionally known application method.
- an undercoat agent may be applied to the self-assembled film on the self-assembled film.
- various conventionally known undercoat agents can be used as the undercoat agent.
- the self-assembled film may be formed in the guide pattern.
- a self-assembled film can be formed by applying a solution of a polymer material for self-assembled film to a silicon substrate with a guide pattern.
- a pattern of a self-organized microdomain structure was obtained on the silicon substrate by an annealing treatment at 200 ° C. to 300 ° C. for 5 minutes to 1 hour.
- an L / S pattern and a CH pattern with a half pitch (hp) of 10 nm or less can be obtained by etching the obtained microdomain structure pattern with an oxygen plasma gas.
- the multi-block copolymer can be evaluated for cohesion by transmission electron microscope (TEM) observation and X-ray small angle scattering (SAXS) measurement.
- the sample for evaluating the cohesive force is prepared by, for example, preparing a 50 mg multi-block copolymer sample film, dissolving the prepared sample in 1 g of non-added THF, transferring it to a Teflon petri dish, and casting it for 10 days in a Teflon petri dish. Can be created by drying.
- the sample film is first cut into an appropriate size and placed in an embedding mold, and then poured into an epoxy resin and allowed to stand at 60 ° C. for 12 hours to cure the epoxy resin and perform an embedding process. To do.
- the sample film embedded using a microtome is cut into sections having a thickness of about 50 nm, the sections are collected on a Cu grid, stained with Cs 2 CO 3 , and then observed with a transmission electron microscope apparatus. Hp can be measured.
- the block copolymer powder is heat-treated on a heat-resistant film, and is subjected to a small-angle X-ray scattering (SAXS) analyzer (an ultra-fine periodic structure analysis system Nano-Viewer AXIS). IV Rigaku Co.) can be used to measure the microphase separation in the bulk state.
- SAXS small-angle X-ray scattering
- IV Rigaku Co. IV Rigaku Co.
- q / nm-1 is calculated by performing background correction such as air scattering, and after performing Fourier transform analysis, the average repeat pattern size width of the microdomain structure due to self-organization of the block copolymer It is possible to measure the value of the half pitch (hp) of the self-assembled film, which is half of the constant period (d).
- the first polymer block including the structural unit represented by the general formula (1) is different in polarity from the first polymer block. Since the 2nd polymer block containing the structural unit represented by General formula (2) which has is repeated, the repulsive force of a 1st polymer block and a 2nd polymer block is accelerated
- the structural unit represented by the general formula (2) contains a silicon (Si) atom
- the interaction between the first polymer block and the second polymer block is improved, and the ⁇ parameter is increased. Etching resistance is improved.
- the microphase separation property is improved and defects based on the microphase separation failure can be reduced, and a finer repetitive pattern can be formed. Therefore, it is possible to realize a self-organizing polymer material that can reduce defects based on microphase separation failure sites and can form fine and minute repeating patterns.
- the polymer material for self-organization according to the present invention can form an L / S pattern having an hp of 10 nm or less, which has been difficult with the conventional ArF excimer laser and EUV lithography. It can be suitably used as a photonics crystal, used as a domain size control method for organic thin film solar cells, polymer micelles for drug delivery, and biomaterials. Become.
- Example 1 Synthesis of tetrablock copolymer
- THF tetrahydrofuran
- the tetrablock copolymer solution after deprotection was added to 4.5 L of ultrapure water to precipitate and wash the tetrablock copolymer (2).
- the tetrablock copolymer solution after deprotection was added to 4.5 L of ultrapure water to precipitate and wash the tetrablock copolymer (2).
- After filtering a solid component with a filter it dried under reduced pressure at 50 degreeC for 20 hours, and obtained 45 g of white powder solids of the tetrablock copolymer (2).
- FIG. 7 is a diagram showing a GPC chart of the tetrablock copolymer (2). As shown in FIG. 7, as a result of measuring GPC on the basis of standard polystyrene, Mn of the obtained tetrablock copolymer (2) was 13,000 g / mol, and PDI was 1.14.
- composition ratio of tetrablock copolymer (2) The composition ratio of the tetrablock copolymer (2) obtained by a nuclear magnetic resonance (NMR) spectrum method ( 1 H-NMR) was measured. The measurement conditions are shown below.
- NMR measurement apparatus trade name “ADVANCEIII HD Nano-Bay digital NMR apparatus, manufactured by Bruker, analysis software: Bruker TopSpin (registered trademark) 3.2”), Frequency: 500MHz Temperature: 25 ° C Solvent: CDCl 3 , Internal standard: Tetramethylsilane (TMS: Tetramethylsilane) Integration count: 128 times
- Figure 8 is a graph showing the results of 1 H-NMR of the tetra-block copolymer (1)
- 9 is a graph showing the results of 1 H-NMR of the tetra-block copolymer (2) is there.
- signals derived from the benzene ring (6.0 ppm to 7.0 ppm)
- signals derived from the methine group and the methylene group 6.2 ppm to 7 ppm) .2 ppm
- signals derived from hydroxyl groups (8.7 ppm to 9.2 ppm) were revealed.
- SAXS small-angle X-ray scattering
- q / nm-1 is calculated by performing background correction such as air scattering, and after performing Fourier transform analysis, the average repeat pattern size width of the microdomain structure due to self-organization of the block copolymer
- the value of the half pitch (hp) of the self-assembled film, which is half of the constant period (d) was measured.
- the identity cycle (d) was 11.82 nm
- the half pitch (hp) was 5.9 nm.
- Example 2 Synthesis of triblock copolymer
- THF tetrahydrofuran
- metallic sodium and benzophenone was injected under reduced pressure and cooled to -70 ° C.
- 11.5 ml of s-butyllithium is injected into the cooled THF solution, and then the dropping rate is adjusted so that the internal temperature of the reaction solution does not exceed ⁇ 60 ° C.
- the triblock copolymer (1) was injected into 100 g of THF and 335 g of acetone to redissolve the triblock copolymer (1), and then added to 4.5 L of ultrapure water to add the triblock copolymer. (1) was deposited and washed. Next, after filtering a solid component with a filter, it dried under reduced pressure at 50 degreeC for 20 hours, and obtained 48.0g of white powder solids of the triblock copolymer (1).
- the triblock copolymer (2) solution after deprotection was added to 4.5 L of ultrapure water to precipitate and wash the triblock copolymer (2).
- the triblock copolymer (2) solution after deprotection was added to 4.5 L of ultrapure water to precipitate and wash the triblock copolymer (2).
- After filtering a solid component with a filter it dried under reduced pressure at 50 degreeC for 20 hours, and obtained 45.0 g of white powder solids of the triblock copolymer (2).
- composition ratio, Mn and PDI of the triblock copolymer (2) were measured by the measurement method described above. The measurement results are shown below and in Table 2 below.
- FIG. 10 is a diagram showing SAXS observation results of a pattern obtained using the triblock copolymer (2). As shown in FIG. 11, the identity period (d) was 10.27 nm and hp was 5.1. The measurement results are shown in Table 2 below.
- the solution of the diblock copolymer (2) after deprotection was added to 18.5 L of ultrapure water to precipitate and wash the diblock copolymer (2).
- the filtering a solid component with a filter it dried under reduced pressure at 50 degreeC for 20 hours, and obtained white powder solid block 157.1g of the diblock copolymer (2).
- the composition ratio, Mn, PDI and SAXS of the diblock copolymer (2) were measured in the same manner as in Example 1. The measurement results are shown below and in Table 2 below.
- P represents a polymer
- HSt represents 4-hydroxystyrene
- TMSSt represents 4-trimethylsilylstyrene.
- -B- indicates that they are linked by a block chain.
- a microphase separation structure having a half pattern (hp) of 10 nm or less can be easily obtained (Examples 1 and 2). From this result, it can be seen that according to the present invention, it is possible to reduce defects based on the microphase separation failure sites and to form fine and minute repetitive patterns.
- the diblock copolymer having the same structural unit as in Examples 1 and 2 it can be seen that no micro-layer separation structure is observed.
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Abstract
Description
(一般式(1)中、mは、1以上1000以下の整数である。)
(一般式(2)中、R1は、水素原子及び炭素数1以上3以下のアルキル基を表す。R2は、それぞれ炭素原子1以上5以下のアルキル基を表す。lは、1以上1000以下の整数である。)
本発明に係る自己組織化用高分子材料は、下記一般式(1)を含む構成単位を主体とする第1重合体ブロックと、下記一般式(2)で表される構成単位を主体とする第2重合体ブロックとが共重合により連結されてなるトリブロック共重合体以上のマルチブロック共重合体を含有する。
(一般式(1)中、mは、1以上1000以下の整数である。)
(一般式(2)中、R1は、水素原子及び炭素数1以上3以下のアルキル基を表す。R2は、それぞれ炭素原子1以上5以下のアルキル基を表す。lは、1以上1000以下の整数である。)
5Lのアニオン重合反応装置を減圧乾燥した後、減圧下、金属ナトリウム及びアントラセンによる蒸留脱水処理を行ったテトラヒドロフラン(THF)溶液4500gを注入して-70℃まで冷却した。次に、冷却したTHF溶液にs-ブチルリチウム(シクロヘキサン溶液:2.03mol/L)9.09mlを注入した。次に、反応溶液の内温が-60℃以上にならないように滴下速度を調整しながら蒸留精製処理を行った4-エトキシエトキシスチレン35.9gを滴下し、滴下終了後、更に30分間反応させた。次に、更に蒸留脱水処理を行った4-トリメチルシリルスチレン39.1gを滴下注入して30分間反応させた。さらにその後、4-エトキシエトキシスチレン35.9gと4-トリメチルシリルスチレン39.1gを順次滴下することで、重合反応を継続して行った。その後、メタノール30gを投入することにより重合反応を停止し、反応液を濃縮することによりテトラブロック共重合体(1)150gを得た。
ゲルパーミッションクロマトグラフィー(GPC)法により得られたテトラブロック共重合体(2)の数平均分子量及び分子量分布を測定した。測定条件を以下に示す。
GPC測定装置:商品名:「HLC-8220GPC」、東ソー社製
カラム:商品名「GPCカラム:TSKgel Super HZ2000 HZ3000」、東ソー社製)
移動相:THF
カラム温度:30℃
標準物質:ポリスチレン
核磁気共鳴(NMR:Nuclear Magnetic Resonance)スペクトル法(1H-NMR)により得られたテトラブロック共重合体(2)の組成比を測定した。測定条件を以下に示す。
NMR測定装置:商品名「ADVANCEIII HD Nano-BayデジタルNMR装置、Bruker社製、解析ソフト:Bruker TopSpin(登録商標)3.2」)、
周波数:500MHz
温度:25℃、
溶媒:CDCl3、
内部標準:テトラメチルシラン(TMS:Tetramethylsilane)
積算回数:128回
5Lのアニオン重合反応装置を減圧乾燥した後、減圧下、金属ナトリウム及びベンゾフェノンによる蒸留脱水処理を行ったテトラヒドロフラン(THF)溶液4500gを注入して-70℃まで冷却した。次に、冷却したTHF溶液に、s-ブチルリチウム(シクロヘキサン溶液:2.03mol/L)11.5mlを注入した後、反応溶液の内温が-60℃以上にならないように滴下速度を調整しながら蒸留精製処理を行った4-エトキシエトキシスチレン33.9gを注入し、滴下終了後更に30分間反応させた。次に、4-トリメチルシリルスチレンを74.0g滴下注入し30分間反応させた。その後もう一度4-エトキシエトキシスチレン33.9gを滴下することにより、トリブロック共重合体(I)を重合した。次に、メタノール30gを注入して反応を停止させた後、反応液を濃縮してトリブロック重合体(1)142gを得た。次に、トリブロック共重合体(1)50gをTHF100g、アセトン335gを注入してトリブロック共重合体(1)を再溶解させた後、超純水4.5Lに加えてトリブロック共重合体(1)を析出させて洗浄を行った。次に、固体成分をフィルターにより濾過した後、50℃で20時間減圧乾燥してトリブロック共重合体(1)の白色粉末固体48.0gを得た。
・トリブロック共重合体(2)の組成比
4-ヒドロキシスチレン:4-トリメチルシリルスチレン=50:50
・Mn=7,000g/mol
・PDI=1.11
5Lのアニオン重合反応装置を減圧乾燥した後、減圧下、金属ナトリウム及びベンゾフェノンによる蒸留脱水処理を行ったテトラヒドロフラン(THF)溶液4500gを注入して-70℃まで冷却した。次に、冷却したTHF溶液に、s-ブチルリチウム(シクロヘキサン溶液:2.03mol/L)25.5mlを注入し、反応溶液の内温が-60℃以上にならないように滴下速度を調整しながら蒸留精製処理を行った4-トリメチルシリルスチレン76.7gを滴下した後、滴下終了30分間反応させた。次に、4-エトキシエトキシスチレン127.4gを滴下注入して30分間反応させてジブロック共重合体(I)を重合した。次に、メタノール30gを注入して反応を停止させた後、反応溶液を減圧濃縮した。次に、アセトン335gを注入してジブロック共重合体(1)を再溶解させた後、超純水18.5Lに加えてジブロック共重合体(1)を析出させて洗浄を行った。次に、固体成分をフィルターにより濾過した後、50℃で20時間減圧乾燥してジブロック共重合体(1)の白色粉末固体204.1gを得た。
・ジブロック共重合体(2)の組成比
・4-ヒドロキシスチレン:4-トリメチルシリルスチレン=43.0:57.0
・Mn=4000g/mol
・PDI=1.05
・SAXS:ミクロ相分離構造は確認されなかった。
1B シリンダー構造
1C ジャイロイド構造
1D ラメラ構造
11、11-1 第1重合体ブロック
12、12-1 第2重合体ブロック
13 第3重合体ブロック
14 界面
Claims (12)
- 前記マルチブロック共重合体は、トリブロック共重合又はテトラブロック共重合体である、請求項1に記載の自己組織化用高分子材料。
- 前記マルチブロック共重合体は、テトラブロック共重合体である、請求項1に記載の自己組織化用高分子材料。
- 前記マルチブロック共重合体は、リビングアニオン重合により共重合されてなる、請求項1から請求項3のいずれか1項に記載の自己組織化用高分子材料。
- 前記マルチブロック共重合体は、数平均分子量が3,000以上50,000以下である、請求項1から請求項4のいずれか1項に記載の自己組織化用高分子材料。
- 請求項1から請求項5のいずれか1項に記載の自己組織化用高分子材料を用いて得られたことを特徴とする、自己組織化膜。
- 表面にトップコート剤が塗布されてなる、請求項6に記載の自己組織化膜。
- 請求項1から請求項5のいずれか1項に記載の自己組織化用高分子材料を用いて自己組織化膜を形成することを特徴とする、自己組織化膜の製造方法。
- ガイドパターン内で自己組織化膜を形成する、請求項8に記載の自己組織化膜の製造方法。
- 前記自己組織化膜上にトップコート剤を塗布する工程を含む、請求項8又は請求項9に記載の自己組織化膜の製造方法。
- 請求項6又は請求項7に記載の自己組織化膜がエッチングされてなることを特徴とする、パターン。
- 請求項6又は請求項7に記載の自己組織化膜をエッチングしてパターンを形成する工程を含むことを特徴とする、パターンの形成方法。
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JPH10223042A (ja) * | 1997-01-31 | 1998-08-21 | Shin Etsu Chem Co Ltd | ブロック−グラフト共重合体とこれを用いた架橋型高分子固体電解質の製造方法および架橋型高分子固体電解質 |
JPH10237143A (ja) * | 1997-02-21 | 1998-09-08 | Shin Etsu Chem Co Ltd | ブロック−グラフト共重合体およびこれを用いて作製した高分子固体電解質 |
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JPH10223042A (ja) * | 1997-01-31 | 1998-08-21 | Shin Etsu Chem Co Ltd | ブロック−グラフト共重合体とこれを用いた架橋型高分子固体電解質の製造方法および架橋型高分子固体電解質 |
JPH10237143A (ja) * | 1997-02-21 | 1998-09-08 | Shin Etsu Chem Co Ltd | ブロック−グラフト共重合体およびこれを用いて作製した高分子固体電解質 |
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