WO2016195449A1 - 중성층 조성물 - Google Patents
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- WO2016195449A1 WO2016195449A1 PCT/KR2016/005978 KR2016005978W WO2016195449A1 WO 2016195449 A1 WO2016195449 A1 WO 2016195449A1 KR 2016005978 W KR2016005978 W KR 2016005978W WO 2016195449 A1 WO2016195449 A1 WO 2016195449A1
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Definitions
- Block copolymers in which two or more chemically distinct polymer chains are linked by covalent bonds can be separated into regular microphases because of their self assembly properties.
- the microphase separation phenomenon of such block copolymers is generally explained by the volume fraction, molecular weight, and floc-Huggins interaction parameter between components, and nanoscale spheres, cylinders, and gyroids. (gyroid) or lamella (lamella) and the like can form a variety of structures.
- spherical block copolymer nanostructure is a zero-dimensional structure with no orientation of special orientation
- the cylindrical or lamellar nanostructures are oriented as one-dimensional and two-dimensional structures, respectively.
- Representative orientations of block copolymers include parallel orientations in which the nanostructures are parallel to the substrate direction and vertical orientations in which the nanostructures are perpendicular to the substrate direction. Often they have greater importance than orientation.
- the orientation of the nanostructures in the film of the block copolymer can be determined by which of the blocks of the block copolymer is exposed to the surface or air. That is, the orientation of the nanostructures can be determined by selective wetting of the blocks. In general, blocks having a greater polarity in the block copolymer are wetting onto the substrate because more substrates are polar and air is nonpolar. Blocks with small polarity are wetting at the interface with air, leading to parallel orientation.
- the present application provides a neutral layer composition.
- neutral layer composition may refer to a composition used to form a neutral layer.
- neutral layer in the present application may refer to any kind of layer capable of inducing the vertical orientation of the block copolymer.
- the neutral layer composition may contain a predetermined random copolymer.
- the random copolymer may include a unit of Formula 1 below.
- Y is a monovalent hydrocarbon group having 3 to 30 carbon atoms.
- T in formula (2) is a divalent hydrocarbon group
- m is a number in the range of 1 to 5.
- the term single bond may refer to a case where no separate atom exists in a corresponding portion. Therefore, when X is a single bond in Formula 1, X is not present, and Y is directly connected to the benzene ring.
- alkylene group may mean an alkylene group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms.
- the alkylene group may be a straight chain, branched or cyclic alkylene group, and may be optionally substituted with one or more substituents.
- monovalent or divalent hydrocarbon group may mean a monovalent or divalent residue derived from a compound consisting of carbon and hydrogen or a derivative thereof.
- the compound consisting of carbon and hydrogen include alkanes, alkenes, alkynes or aromatic hydrocarbons.
- alkanes may mean alkanes having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms.
- the alkanes may be linear, branched or cyclic and may be optionally substituted by one or more substituents.
- Alkyl may be exemplified as the monovalent residue derived from alkanes, and alkylene may be exemplified as the divalent residue.
- alkenes may refer to alkenes having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, unless otherwise specified.
- the alkenes may be linear, branched or cyclic and may be optionally substituted by one or more substituents.
- Alkenyl may be exemplified as the monovalent residue derived from alkene and alkenylene may be exemplified as the divalent residue.
- alkyne may mean alkyne having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms.
- the alkyne may be linear, branched or cyclic and may be optionally substituted by one or more substituents.
- Alkynyl may be exemplified as the monovalent residue derived from alkyne, and alkynylene may be exemplified as the divalent residue.
- aryl monovalent residues derived from aromatic hydrocarbons
- divalent residues may be referred to as arylene.
- aryl group or arylene group is one benzene ring structure, at least two benzene rings are connected while sharing one or two carbon atoms, or connected by any linker It may mean a monovalent or divalent residue derived from a compound or a derivative thereof containing the structure.
- the aryl group or arylene group may be, for example, an aryl group having 6 to 30 carbon atoms, 6 to 25 carbon atoms, 6 to 21 carbon atoms, 6 to 18 carbon atoms, or 6 to 13 carbon atoms.
- Substituents which may be optionally substituted with substituents such as alkanes, alkenes, alkynes, alkyls, alkylenes, alkenyls, alkenylenes, alkynyls, alkynylenes, aromatic hydrocarbons, aryl groups or arylene groups in the present application or other substituents.
- substituents such as alkanes, alkenes, alkynes, alkyls, alkylenes, alkenyls, alkenylenes, alkynyls, alkynylenes, aromatic hydrocarbons, aryl groups or arylene groups in the present application or other substituents.
- substituents such as alkanes, alkenes, alkynes, alkyls, alkylenes, alkenyls, alkenylenes, alkynyls, alkynylenes, aromatic hydrocarbons, aryl groups or arylene groups in the present application or other substituents
- -X-Y may be substituted in the ortho, meta or para position.
- Monomers capable of forming units of formula 1 include 4-propyl styrene, 4-butyl styrene, 4-pentyl styrene, 4-hexyl styrene, 4-octyl styrene, 4-decyl styrene, 4-dodecyl styrene, 4-tetradecyl styrene, 4-hexadecyl styrene, 4-octadecyl styrene, 4-icosyl styrene, 4-propyloxy styrene, 4-butyloxy styrene, 4-pentyloxy styrene, 4-hexyloxy styrene, 4 -Octyloxy styrene, 4-decyloxy styrene, 4-dodecyloxy styrene, 4-tetradecyloxy
- the random copolymer comprising a unit of formula (1) is a vertical orientation of various block copolymers, for example, a block copolymer comprising a block of units of the formula (1) or a unit of a similar structure as described below It is possible to effectively form a neutral layer that can lead to.
- the benzene ring in the unit of formula (1) may, if necessary, include one or more crosslinkable functional groups, for example, a hydroxy group, an epoxy group, an isocyanate group, a glycidyl group, a substituent of the following formula (8), a benzoylphenoxy group, an alkenyloxycarbonyl group, ( A meta) acryloyl group, an alkenyloxyalkyl group, etc. may be substituted.
- crosslinkable functional groups for example, a hydroxy group, an epoxy group, an isocyanate group, a glycidyl group, a substituent of the following formula (8), a benzoylphenoxy group, an alkenyloxycarbonyl group, ( A meta) acryloyl group, an alkenyloxyalkyl group, etc.
- the functional group for example, a hydroxy group and the like may be bonded to the end of the random copolymer including the unit of the formula (1).
- the random copolymer having a hydroxyl group bonded to the terminal is prepared by polymerizing the random copolymer using a RAFT (Reversible Addition Fragmentation Chain Transfer) agent or an ATRP (Atom Transfer radical polymerization) initiator having a hydroxyl group bonded to the terminal. can do.
- RAFT Reversible Addition Fragmentation Chain Transfer
- ATRP Atom Transfer radical polymerization
- the ratio of the unit of the formula (1) in the random copolymer is not particularly limited, and this ratio may be adjusted according to the kind of the block copolymer to which the neutral layer is applied, for example.
- the ratio of the unit of Formula 1 in the random copolymer may be in the range of about 10 mol% to 90 mol%.
- the ratio may in another example be at least 15 mol%, at least 20 mol%, at least 25 mol%, at least 30 mol%, at least 35 mol%, at least 40 mol% or at least 45 mol%, at most 85 mol%, 80 mol % Or less, 75 mol% or less, 70 mol% or less, 65 mol% or less, 60 mol% or less, 55 mol% or less, or about 50 mol% or less, but is not limited thereto.
- the random copolymer may include additional units together with the unit of formula (1).
- additional unit for example, any one of units represented by one of the following Chemical Formulas 3 to 7 may be exemplified.
- a unit represented by any one of Chemical Formulas 3 to 7 may be referred to as a second unit.
- R is hydrogen or an alkyl group
- T is a divalent hydrocarbon group with or without a single bond or hetero atom.
- R is hydrogen or an alkyl group
- A is an alkylene group
- R1 may be hydrogen, a halogen atom, an alkyl group or a haloalkyl group
- n is a number in the range of 1 to 3.
- R is hydrogen or an alkyl group
- T is a divalent hydrocarbon group containing or not containing a hetero atom.
- R is hydrogen or an alkyl group having 1 to 4 carbon atoms
- T is a divalent hydrocarbon group containing or not containing a hetero atom.
- the alkyl group in Chemical Formulas 3 to 7 may be an alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms.
- Such alkyl groups may be straight, branched or cyclic and may be optionally substituted by one or more of the aforementioned substituents.
- the haloalkyl group is an alkyl group in which at least one hydrogen atom is substituted with a halogen atom
- the alkyl group is an alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms.
- Such haloalkyl groups may be straight, branched or cyclic and may be optionally substituted by one or more of the aforementioned substituents.
- examples of the halogen atom substituted with the hydrogen atom may include fluorine or chlorine.
- the alkylene group of A may be an alkylene group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms.
- Such alkylene di groups may be straight, branched or cyclic and may be optionally substituted by one or more of the aforementioned substituents.
- the basic definition of the divalent hydrocarbon group in the formula (3-7) is as described above.
- the divalent hydrocarbon group of Formula 3-7 may further contain a hetero atom if necessary.
- the hetero atom is a hetero atom with respect to carbon, for example, oxygen, nitrogen or sulfur. Such hetero atoms may be included in one to four or less in the divalent hydrocarbon group of the formula (3-7).
- the kind of the crosslinkable functional group contained in the above formula (7) is not particularly limited.
- the crosslinkable functional group may be a photocrosslinkable functional group or a thermal crosslinkable functional group.
- a photocrosslinkable functional group a benzoylphenoxy group, an alkenyloxycarbonyl group, a (meth) acryloyl group or an alkenyloxyalkyl group may be exemplified, but is not limited thereto.
- a crosslinkable functional group which can be contained in the unit of Formula 7, for example, a functional group represented by the following Formula (8) can be used.
- Y is a single bond, an alkylene group, an alkenylene group or an alkynylene group
- the functional group of formula (8) is a substituent having a crosslinkable azide moiety at the terminal, and such functional group may be crosslinked.
- Y may be, in another example, an alkylene group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms.
- Examples of the monomer capable of forming the units of Chemical Formulas 3 to 7 are not particularly limited.
- glycidyl (meth) acrylate may be exemplified as the monomer capable of forming the unit of Formula 3
- 4-vinyl benzocyclo is a monomer capable of forming the unit of Formula 4.
- Butene etc. can be illustrated,
- As a monomer which can form the unit of Formula 5 2-isocyanatoethyl acrylate, 2-isocyanatoethyl (meth) acrylate, 4-isocyanatobutyl acrylate Or 4-isocyanatobutyl (meth) acrylate, etc.
- hydroxymethyl acrylate, hydroxymethyl (meth) acrylate, 2-hydroxy Hydroxyethyl acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl acrylate, 3-hydroxy Lofil (meth) acrylate 2-hydroxybutyl acrylate, 2-hydroxybutyl (meth) acrylate, 4-hydroxybutyl acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl acrylic Late or 6-hydroxyhexyl (meth) acrylate and the like can be exemplified, but is not limited thereto.
- the crosslinkable functional group mentioned above to monomers such as styrene
- the monomer of the said Formula (8) for example, the monomer of the said Formula (8), a benzoyl phenoxy group, an alkenyloxycarbonyl group, (meth)
- the monomer etc. which one or more acryloyl group, an alkenyloxyalkyl group, etc. are substituted may be illustrated.
- the ratio of the second unit in the random copolymer is not particularly limited, and this ratio may be adjusted according to the type of the block copolymer to which the neutral layer is applied, for example.
- the ratio of the second unit in the random copolymer may be about 1 mol% to 20 mol%, but is not limited thereto. In another example, the ratio may be about 18 mol% or less, 16 mol% or less, 14 mol% or less, 12 mol% or less, 10 mol% or less, 8 mol% or less, 6 mol% or less, or about 4 mol% or less.
- the random copolymer may include additional units (hereinafter, third units) together with the units of Formula 1 and the second units.
- third units methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl ( Polymerized units derived from (meth) acrylic acid ester compounds such as meta) acrylate, t-butyl (meth) acrylate, n-hexyl (meth) acrylate or octyl (meth) acrylate, 2-vinyl pyridine or 4-vinyl pyridine Vinyl pyridine derived polymer units such as styrene, 4-trimethylsilylstyrene, 2,3,4,5,6-pentafluorostyrene, 3,4,5-trifluorostyrene, 2,4,6-trifluor
- the random copolymer may further include a unit represented by Formula 9 as the third unit.
- R 1 is hydrogen or an alkyl group
- R 2 is an alkyl group
- R 1 in Formula 9 is hydrogen or an alkyl group having 1 to 4 carbon atoms in another example; Hydrogen or methyl group; Or a methyl group.
- R 2 may be, in another example, an alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms.
- the above-described monomer-derived polymerization unit may mean a skeleton structure in which each monomer described above is polymerized to form a random copolymer.
- the ratio is There is no restriction
- the ratio of the third unit in the random copolymer may be about 10 mol% to 90 mol%, but is not limited thereto.
- the ratio may, in another example, be at least about 15 mol%, at least 20 mol%, at least 25 mol%, at least 30 mol%, at least 35 mol%, at least 40 mol%, or at least 45 mol%, and also at most 85 mol%, 80 mol% or less, 75 mol% or less, 70 mol% or less, 65 mol% or less, 60 mol% or less, or 55 mol% or less.
- the random copolymer may have a number average molecular weight (Mn) in the range of, for example, 2,000 to 500,000.
- the number average molecular weight is, in another example, at least 3,000, at least 4,000, at least 5,000, at least 6,000, at least 7,000, at least 8,000, at least 9,000, at least 10,000, at least 20,000, at least 30,000, at least 40,000, at least 50,000, at least 60,000, at least 70,000.
- the number average molecular weight may be about 400,000 or less, 300,000 or less, or about 200,000 or less in another example.
- the term number average molecular weight is a conversion value with respect to standard polystyrene measured using a gel permeation chromatograph (GPC), and the term molecular weight means a number average molecular weight unless otherwise specified.
- the molecular weight of the random copolymer may be adjusted in consideration of physical properties of the neutral layer including the random copolymer.
- the random copolymer may be prepared by applying a free radical polymerization method or a LRP (Living Radical Polymerization) method.
- LRP Living Radical Polymerization
- examples of the LRP method include an anionic polymerization and a polymerization agent which proceeds polymerization in the presence of an inorganic acid salt or an organoaluminum compound, such as a salt of an alkali metal or an alkaline earth metal, using an organic rare earth metal complex or an organic alkali metal compound as an initiator.
- An atomic transfer radical polymerization method using an atomic transfer radical polymerizer as a yesterday, ARGET (Activators Regenerated by Electron) using an atomic transfer radical polymerizer as a polymerization control agent, but proceeds polymerization under an organic or inorganic reducing agent that generates electrons Transfer (ATRP), Initiators for continuous activator regeneration (ICAR) Atomic radical polymerization, Inorganic reducing agent Reversible addition-breaking chain transfer using reversible addition-breaking chain transfer (RAFT) or organic
- a suitable method may be employed in the method.
- the kind of radical initiator that can be used in the polymerization process is not particularly limited.
- an azo initiator such as AIBN (azobisisobutyronitrile) or 2,2'-azobis-2,4-dimethylvaleronitrile (2,2'-azobis- (2,4-dimethylvaleronitrile)) or BPO (benzoyl) Peroxide-based initiators such as peroxide) or di-tert-butyl peroxide (DTBP) may be applied.
- AIBN azobisisobutyronitrile
- 2,2'-azobis-2,4-dimethylvaleronitrile (2,2'-azobis- (2,4-dimethylvaleronitrile)) or BPO (benzoyl) Peroxide-based initiators such as peroxide) or di-tert-butyl peroxide (DTBP) may be applied.
- DTBP di-tert-butyl peroxide
- the polymerization process can be carried out, for example, in a suitable solvent, in which case applicable solvents include methylene chloride, 1,2-dichloroethane, chlorobenzene, dichlorobenzene, benzene, toluene, anisole, acetone Solvents such as, chloroform, tetrahydrofuran, dioxane, monoglyme, diglyme, dimethylformamide, dimethylsulfoxide or dimethylacetamide may be exemplified, but are not limited thereto.
- solvents include methylene chloride, 1,2-dichloroethane, chlorobenzene, dichlorobenzene, benzene, toluene, anisole, acetone Solvents such as, chloroform, tetrahydrofuran, dioxane, monoglyme, diglyme, dimethylformamide, dimethylsulfoxide or dimethylacetamide may be exemplified, but are not limited thereto
- a random copolymer can be obtained by precipitation using a non-solvent, and non-solvents that can be used at this time include alcohols such as methanol, ethanol, n-propanol or isopropanol, ethylene glycol, and the like.
- Ether-based solvents such as glycol, n-hexane, cyclohexane, n-heptane or petroleum ether may be exemplified, but is not limited thereto.
- the neutral layer composition including the random copolymer as described above may include only the predetermined random copolymer or, if necessary, may include other components in addition to the random copolymer.
- the neutral layer composition may include at least the random copolymer as a main component. Including the main component herein means that the composition comprises only the random copolymer, or about 50% by weight, 55% by weight, 60% by weight, 65% by weight, 70% by weight, It may mean a case containing 75 wt% or more, 80 wt% or more, 85 wt% or more, or 90 wt% or more.
- the ratio may, in another example, be about 100 wt% or less or about 99 wt% or less.
- other components that may be included with the random copolymer may include, for example, a thermal initiator or a photoinitiator required when the random copolymer includes the photocrosslinkable or thermal crosslinkable functional groups described above.
- the present application also relates to a neutral layer comprising the random copolymer.
- neutral layer refers to a layer capable of inducing vertical alignment of the block copolymer as described above.
- the neutral layer may be formed on a suitable substrate.
- a silicon wafer, a silicon oxide substrate, a silicon nitride substrate, or a crosslinked PET (poly (ethylene terephthalate)) film may be exemplified, but is not limited thereto.
- the said neutral layer can be formed using the above-mentioned neutral layer composition.
- the process of forming the neutral layer may include coating the neutral layer composition on a substrate and fixing the coated layer of the neutral layer composition.
- the method of coating the neutral layer composition on the substrate is not particularly limited, for example, bar coating, spin coating or comma coating may be applied, and a roll-to-roll coating may also be applied. have.
- the method of fixing the layer of the neutral layer composition in the above is not particularly limited, for example, a method of inducing a covalent bond between the layer and the substrate or a chemical crosslinking reaction in the layer by an appropriate method. Etc. may be applied.
- the heat treatment may be controlled within a range of about 100 ° C to 250 ° C or about 100 ° C to 200 ° C.
- the time required for the heat treatment may be changed as needed, for example, it may be adjusted within the range of about 1 minute to 72 hours or about 1 minute to 24 hours.
- the temperature and time of the heat treatment may be adjusted to an appropriate level in consideration of the kind of the functional group of the random copolymer of the neutral layer composition.
- the neutral layer may have a thickness of, for example, about 2 nm to 100 nm, and in another example, may have a thickness of about 2 nm to 50 nm.
- the uniformity of the surface of the neutral layer may be maintained within the thickness range, may induce a vertical orientation of the block copolymer, there may be an advantage that may not damage the etch selectivity in the subsequent etching process.
- the present application also includes a polymer layer including a neutral copolymer including the random copolymer and a block copolymer formed on one surface of the neutral layer and having a first block and a second block chemically distinct from the first block. It is for a laminate comprising a.
- the polymer film may be used in various applications.
- various electronic or electronic devices a process of forming the pattern or a recording medium such as a magnetic storage recording medium, a flash memory, or a biosensor or the like may be used. It can be used in manufacturing processes and the like.
- the block copolymer in the polymer membrane may implement a periodic structure including a sphere, a cylinder, a gyroid or a lamellar through self-assembly. .
- the block copolymer may be present in a vertically oriented state.
- the other segments may be vertically oriented, forming a regular structure such as lamellar form or cylinder form.
- the block copolymer that can be included in the polymer film in the laminate as described above is not particularly limited.
- the block copolymer may include a repeating unit represented by Formula 1 as the first block.
- the type of the second block included with the first block in the block copolymer is not particularly limited.
- a polystyrene block such as polyvinylpyrrolidone block, polylactic acid block, polyvinylpyridine block, polystyrene or poly trimethylsilylstyrene, or poly ( Poly (perfluorostyrene) blocks such as 2,3,4,5,6-pentafluorostyrene), polyacrylate blocks such as poly (methyl acrylate), and poly (methyl methacrylate) such as poly (methyl methacrylate) Meta) acrylate blocks, polyalkylene oxide blocks such as polyethylene oxide, poly butadiene blocks, polyisoprene blocks or polyolefin blocks such as polyethylene have.
- a block including a unit of Formulas 3 to 7 and / or a unit of Formula 9 may be used.
- the block copolymer of the present application is a diblock copolymer including the above-described first block and the second block, or includes two or more of one or more of the first block and the second block, or a third kind of third block. It may be a multiblock copolymer comprising a.
- the number average molecular weight (Mn) of the block copolymer may be, for example, in the range of 2,000 to 500,000.
- the block copolymer may have a polydispersity (Mw / Mn) in the range of 1.01 to 1.50.
- the block copolymer may exhibit suitable self-assembly properties.
- the number average molecular weight of the block copolymer can be adjusted in view of the desired self-assembly structure and the like.
- the ratio of the first block in the block copolymer is 10 mol% to 90 mol. It may be in the range of%.
- the specific method of preparing the block copolymer in the present application is not particularly limited as long as it includes forming at least one block of the block copolymer using the aforementioned monomers.
- the block copolymer may be prepared by LRP (Living Radical Polymerization) method using the monomer.
- LRP Living Radical Polymerization
- an anionic polymerization or an organic alkali metal compound synthesized in the presence of an inorganic acid such as an alkali metal or a salt of an alkaline earth metal is polymerized using an organic rare earth metal complex as a polymerization initiator or an organic alkali metal compound as a polymerization initiator.
- Anion polymerization method synthesized in the presence of an organoaluminum compound using as an initiator, atom transfer radical polymerization method (ATRP) using an atom transfer radical polymerization agent as a polymerization control agent, an atomic transfer radical polymerization agent as a polymerization control agent is used.
- RAFT polymerization method of
- organic tellurium compound, etc. as an initiator
- the block copolymer may be prepared in a manner that includes polymerizing a reactant including monomers capable of forming the block by living radical polymerization in the presence of a radical initiator and a living radical polymerization reagent. .
- the method of forming another block included in the copolymer together with the block formed by using the monomer in the preparation of the block copolymer is not particularly limited, and the appropriate monomer is selected in consideration of the type of the desired block. Blocks can be formed.
- the manufacturing process of the block copolymer may further include, for example, precipitating the polymerization product produced through the above process in the non-solvent.
- the kind of radical initiator is not particularly limited and may be appropriately selected in consideration of the polymerization efficiency, and for example, AIBN (azobisisobutyronitrile) or 2,2'-azobis-2,4-dimethylvaleronitrile (2,2 ').
- Azo compounds such as -azobis- (2,4-dimethylvaleronitrile)) or peroxides such as benzoyl peroxide (BPO) or di-t-butyl peroxide (DTBP) can be used.
- Living radical polymerization processes are, for example, methylene chloride, 1,2-dichloroethane, chlorobenzene, dichlorobenzene, benzene, toluene, acetone, chloroform, tetrahydrofuran, dioxane, monoglyme, diglyme, dimethylform It may be carried out in a solvent such as amide, dimethyl sulfoxide or dimethylacetamide.
- non-solvent for example, alcohols such as methanol, ethanol, normal propanol or isopropanol, glycols such as ethylene glycol, ether series such as n-hexane, cyclohexane, n-heptane or petroleum ether may be used. It is not limited to this.
- the method of forming such a polymer film using the block copolymer is not particularly limited.
- the method may include forming a polymer film including the block copolymer on the neutral layer in a self-assembled state.
- the method may include forming a block copolymer or a layer of a coating liquid diluted in a suitable solvent on a neutral layer by applying, and if necessary, aging or heat-treating the layer.
- the aging or heat treatment may be performed based on, for example, the phase transition temperature or the glass transition temperature of the block copolymer, and may be performed, for example, at a temperature above the glass transition temperature or the phase transition temperature.
- the time for which such heat treatment is performed is not particularly limited, and may be, for example, within a range of about 1 minute to 72 hours, but this may be changed as necessary.
- the heat treatment temperature of the polymer thin film may be, for example, about 100 ° C. to 250 ° C., but this may be changed in consideration of the block copolymer used.
- the formed layer may, in another example, be solvent aged for about 1 minute to 72 hours in a nonpolar solvent and / or a polar solvent at room temperature.
- the present application also relates to a pattern forming method.
- the method may include, for example, selectively removing the first or second block of the block copolymer from the polymer film of the laminate.
- the method may be a method of forming a pattern on the substrate.
- the method may include forming a polymer film comprising the block copolymer on the substrate, and etching the substrate after selectively removing any one or more blocks of the block copolymer present in the film. .
- various types of patterns such as nanorods or nanoholes may be formed through the above method.
- the block copolymer and other copolymers or homopolymers may be mixed to form a pattern.
- the type of the substrate to be applied in this manner is not particularly limited and may be selected as necessary, for example, silicon oxide or the like may be applied.
- this approach can form nanoscale patterns of silicon oxide that exhibit high aspect ratios.
- the silicon oxide is removed in various ways, for example, By etching by reactive ion etching, various forms including nanorods or nanohole patterns may be realized.
- the pattern may be implemented on a scale of several tens of nanometers, and the pattern may be utilized for various applications including, for example, a magnetic recording medium for next generation information electronics.
- the method of selectively removing any block of the block copolymer in the above method is not particularly limited.
- a method of removing a relatively soft block by irradiating an appropriate electromagnetic wave, for example, ultraviolet rays, to the polymer film may be employed.
- an appropriate electromagnetic wave for example, ultraviolet rays
- UV irradiation conditions are determined according to the type of the block of the block copolymer, for example, it can be carried out by irradiating ultraviolet light of about 254 nm wavelength for 1 minute to 60 minutes.
- the polymer film may be treated with an acid or the like to further remove the segment decomposed by the ultraviolet ray.
- the step of etching the substrate using the polymer film with the selectively removed block as a mask is not particularly limited, and may be performed through, for example, a reactive ion etching step using CF 4 / Ar ions, and the like. Subsequently, the step of removing the polymer film from the substrate by oxygen plasma treatment or the like may also be performed.
- a neutral layer composition capable of forming a neutral layer that can be effectively applied to the formation of a polymer film including a vertically oriented self-assembled block copolymer may be provided.
- 1 and 2 are diagrams showing the orientation results of block copolymers in Comparative Examples and Examples.
- NMR analysis was performed at room temperature using an NMR spectrometer including a Varian Unity Inova (500 MHz) spectrometer with triple resonance 5 mm probe.
- the analyte was diluted to a concentration of about 10 mg / ml in a solvent for NMR measurement (CDCl 3 ), and chemical shifts were expressed in ppm.
- br wide signal
- s singlet
- d doublet
- dd doublet
- t triplet
- dt doublet
- q quartet
- p quintet
- m multiplet.
- Mn number average molecular weight
- Mn molecular weight distribution
- GPC gel permeation chromatography
- an analyte such as a block copolymer or macroinitiator of Examples or Comparative Examples
- THF tetrahydro furan
- the standard sample for calibration and the sample to be analyzed were filtered through a syringe filter (pore size: 0.45 ⁇ m) and measured.
- the analysis program used ChemStation of Agilent Technologies, and the weight average molecular weight (Mw) and number average molecular weight (Mn) were obtained by comparing the elution time of the sample with the calibration curve, and the molecular weight distribution (PDI) was used as the ratio (Mw / Mn). ) was calculated.
- the measurement conditions of GPC are as follows.
- X is a residue of Formula (B), in which T is methylene, m is 1, and Y in Formula A is a dodecyl group (hereinafter, Compound (A)) is synthesized in the following manner It was. T in formula B is connected to the benzene ring, and the oxygen atom is connected to Y, that is, dodecyl group.
- T in formula B is connected to the benzene ring, and the oxygen atom is connected to Y, that is, dodecyl group.
- AIBN Azobisisobutyronitrile
- CPDB 2-cyanoprop-2-yl-benzodithioate
- Mn number average molecular weight
- Mw molecular weight distribution
- MMA methyl methacrylate
- a concentration solution was prepared.
- the block copolymer is a repeating unit derived from the methyl methacrylate and a repeating unit derived from the compound A, that is, X is a unit of formula 2 of claim 1 in which -XY is linked to a para position in formula 1 of claim 1.
- T is methylene, m is 1, and Y is a dodecyl group (T in formula 2 is connected to a benzene ring, and an oxygen atom is Y, that is, a dodecyl group).
- the random copolymer for neutral layers (B) was synthesized using methyl methacrylate (MMA), the compound (A) and glycidyl methacrylate (GMA).
- MMA, Compound (A), GMA and AIBN were diluted in an anisole with an equivalent ratio of 50: 48: 2: 0.5 (MMA: Compound (A): GMA: AIBN) to a solids concentration of about 60% by weight.
- the solution was prepared. Thereafter, the mixed solution was reacted at 60 ° C. for 10 hours in a nitrogen atmosphere to obtain a random copolymer (B).
- the number average molecular weight (Mn) and molecular weight distribution (Mw / Mn) of the random copolymer (B) were 106600 and 2.50, respectively.
- the block copolymer (A) of Preparation Example 2 was used to form a self-assembled polymer film and the results were confirmed. Specifically, the copolymer was dissolved in toluene at a concentration of about 1.0% by weight, the prepared coating solution was spin-coated on a silicon wafer at a speed of 3000 rpm for 60 seconds, and then thermally aged at about 160 ° C. To form a membrane comprising the self-assembled block copolymer. 1 is an SEM image of a polymer film formed as described above. It can be seen from the figure that the orientation of the polymer membrane is not properly made.
- the random copolymer (B) of Preparation Example 3 and the block copolymer (A) of Preparation Example 2 were used to form a crosslinked neutral layer and a self-assembled polymer film, respectively, and the results were confirmed. Specifically, first, the random copolymer (B) of Preparation Example 3 was dissolved in toluene at a concentration of about 1.0 wt%, the prepared coating solution was spin coated on a silicon wafer at a speed of 3000 rpm for 60 seconds, and then about 160 ° C. The crosslinked neutral layer was formed through thermal crosslinking at.
- the block copolymer (A) was dissolved in toluene at a concentration of about 1.0 wt%, the prepared coating solution was spin-coated on the neutral layer at a speed of 3000 rpm for 60 seconds, and then thermally aged at about 160 ° C. ) Formed a film comprising the self-assembled block copolymer.
- 2 is an SEM image of the polymer film formed as described above. It can be seen from the figure that an appropriate lamellar vertically oriented structure is formed.
Abstract
Description
Claims (14)
- 제 1 항에 있어서, 랜덤 공중합체에서 화학식 1의 단위의 비율이 10몰% 내지 90몰%의 범위 내인 중성층 조성물.
- 제 1 항에 있어서, 랜덤 공중합체는 화학식 3 내지 7 중 어느 하나로 표시되는 단위를 추가로 포함하는 중성층 조성물:[화학식 3]화학식 3에서 R은 수소 또는 알킬기이고, T는 단일 결합 또는 헤테로 원자를 포함하거나 포함하지 않는 2가 탄화수소기이다:[화학식 4]화학식 4에서 R은 수소 또는 알킬기이고, A는 알킬렌기이며, R1은, 수소, 할로겐 원자, 알킬기 또는 할로알킬기일 수 있으며, n은 1 내지 3의 범위 내의 수다:[화학식 5]화학식 5에서 R은 수소 또는 알킬기이고, T는, 헤테로 원자를 포함하거나 포함하지 않는 2가 탄화수소기이다:[화학식 6]화학식 6에서 R은 수소 또는 탄소수 1 내지 4의 알킬기이고, T는, 헤테로 원자를 포함하거나 포함하지 않는 2가 탄화수소기이다:[화학식 7]화학식 7에서 X2는, 단일 결합, 산소 원자, 황 원자, -S(=O)2-, 알킬렌기, 알케닐렌기, 알키닐렌기, -C(=O)-X3- 또는 -X3-C(=O)-이며, 상기 X3는 단일 결합, 산소 원자, 황 원자, -S(=O)2-, 알킬렌기, 알케닐렌기 또는 알키닐렌기이고, R1 내지 R5는 각각 독립적으로 수소, 알킬기, 할로알킬기, 할로겐 원자 또는 가교성 관능기이며, R1 내지 R5가 포함하는 가교성 관능기의 수는 1개 이상이다.
- 제 1 항에 있어서, 화학식 1의 단위에는 가교성 관능기가 치환되어 있는 중성층 조성물.
- 제 1 항에 있어서, 랜덤 공중합체는, (메타)아크릴산 에스테르 화합물 유래 중합 단위, 비닐 피리딘 유래 중합 단위 또는 스티렌계 단랑체 유래 중합 단위를 추가로 포함하는 중성층 조성물.
- 제 1 항에 있어서, 랜덤 공중합체는 수평균분자량이 2000 내지 500000의 범위 내에 있는 중성층 조성물.
- 제 1 항의 중성층 조성물을 기판상에 코팅하는 단계 및 코팅된 상기 중성층 조성물의 층을 고정시키는 단계를 포함하는 중성층의 형성 방법.
- 제 8 항의 중성층; 및 상기 중성층의 일면에 형성되어 있고, 제 1 블록 및 상기 제 1 블록과는 화학적으로 구별되는 제 2 블록을 가지는 블록 공중합체를 포함하는 고분자막을 포함하는 적층체.
- 제 10 항에 있어서, 블록 공중합체는, 스피어, 실린더, 자이로이드 또는 라멜라 구조를 구현하고 있는 적층체.
- 제 8 항의 중성층; 및 상기 중성층의 일면에 형성되어 있고, 제 1 블록 및 상기 제 1 블록과는 화학적으로 구별되는 제 2 블록을 가지는 블록 공중합체를 포함하는 고분자막을 자기 조립된 상태로 형성하는 단계를 포함하는 적층체의 제조 방법.
- 제 13 항의 적층체의 고분자막에서 블록 공중합체의 제 1 또는 제 2 블록을 선택적으로 제거하는 단계를 포함하는 패턴 형성 방법.
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US15/578,951 US10532546B2 (en) | 2015-06-04 | 2016-06-07 | Composite for neutral layer |
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CN107849202B (zh) | 2020-04-21 |
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US20180170023A1 (en) | 2018-06-21 |
KR101946776B1 (ko) | 2019-02-13 |
EP3296335A1 (en) | 2018-03-21 |
KR20160143579A (ko) | 2016-12-14 |
JP2018519379A (ja) | 2018-07-19 |
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