WO2023002928A1 - 半導体用膜形成材料、半導体用部材形成材料、半導体用工程部材形成材料、下層膜形成材料、下層膜及び半導体デバイス - Google Patents
半導体用膜形成材料、半導体用部材形成材料、半導体用工程部材形成材料、下層膜形成材料、下層膜及び半導体デバイス Download PDFInfo
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- C08J5/18—Manufacture of films or sheets
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- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
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- C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
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- C08G61/124—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule derived from five- or six-membered heterocyclic compounds, other than imides derived from five-membered heterocyclic compounds with a five-membered ring containing one nitrogen atom in the ring
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- G03F7/004—Photosensitive materials
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- C08G2261/10—Definition of the polymer structure
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- C08G2261/1422—Side-chains containing oxygen containing OH groups
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Definitions
- the present invention relates to a semiconductor film-forming material containing a compound having a specific skeleton.
- Patent Document 1 describes an oxazine compound having an aromatic ring structure and a plurality of specified carbon-carbon triple bond structures as a compound having excellent heat resistance and low thermal expansion, as well as excellent adhesion and moisture resistance and solder resistance. is described.
- a common example of a multi-layer resist material is a tri-layer resist method with two layers underneath the photoresist layer. Specifically, it is as follows. First, an underlayer film forming material is applied to a substrate to be processed such as a silicon wafer, and the underlayer film is formed by heating. After forming an intermediate film on the underlayer film, a photoresist is applied, and a pattern is formed by exposure and development. Using the formed pattern as a mask, the intermediate film and the lower layer film are sequentially etched under appropriate dry etching conditions. Using the resulting underlayer film pattern as a mask, the substrate to be processed is etched under appropriate dry etching conditions, and the remaining mask is subjected to ashing treatment to obtain a substrate having a desired structure.
- the material for forming the lower layer film must be heat-resistant and solvent-resistant so that it does not deform due to the heat and solvents used when forming the intermediate film and photoresist layer. be. In addition, it is necessary to have a flatness property that allows the film to be evenly formed, as well as the ability to fill the irregularities of the substrate.
- Vinyl derivatives having an aromatic hydrocarbon ring Patent Document 2
- aromatic compounds having a carbon-carbon triple bond structure Patent Document 3
- An object of the present invention is to provide a semiconductor film-forming material that provides a film having excellent heat resistance and solvent resistance.
- the present inventors have found that a compound having a specific skeleton and having one or more reactive groups in the molecule or a polymer having the compound as a monomer, and a solvent are used to form a semiconductor film.
- the inventors have found that the material gives a film having excellent heat resistance and solvent resistance, and have completed the present invention.
- the present invention uses a compound represented by the following general formula (I) and having one or more reactive groups in the molecule (hereinafter also referred to as “compound (I)”) or compound (I) as a monomer It is a semiconductor film-forming material containing a polymer (hereinafter also referred to as “polymer (I)”) and a solvent.
- A represents a hydrocarbon ring having 6 carbon atoms
- X 1 and X 2 are each independently substituted with an aryl group having 6 to 30 carbon atoms which may be substituted with a reactive group or a group having a reactive group
- a reactive group or a group having a reactive group represents a heterocyclic group having 2 to 30 carbon atoms which may be substituted, or a heterocyclic ring-containing group having 3 to 30 carbon atoms which may be substituted by a reactive group or a group having a reactive group
- R 1 , R 2 , R 3 , R 4 , R 6 , R 7 , R 8 and R 9 are each independently substituted with a hydrogen atom, a halogen atom, a reactive group, a nitro group or a reactive group
- heterocyclic groups, or heterocyclic ring-containing groups having 3 to 30 carbon atoms which may be substituted by reactive groups, or one or more methylene groups in the hydrocarbon groups having 1 to 20 carbon atoms
- a group substituted with a divalent group selected from the following ⁇ group A>, or one or more methylene groups in the heterocyclic ring-containing group having 3 to 30 carbon atoms is a divalent selected from the following ⁇ group A> represents a group substituted by a group of ⁇ Group A>: -O-, -CO-, -COO-, -OCO-, -NR 11 -, -NR 12 CO-, -S- R 11 and R 12 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms.
- the film-forming material for semiconductors of the present invention can provide films for semiconductors with excellent heat resistance and solvent resistance.
- a semiconductor film forming material is a material necessary for forming a semiconductor film. Consists of forming material.
- the materials for forming semiconductor members include materials suitable for each application. Examples thereof include insulating film-forming materials, barrier film-forming materials, sealing material-forming materials, gap-filling material-forming materials, mounting films, mounting adhesives, and circuit connection materials.
- Materials suitable for each application are included in the semiconductor process member forming materials. Examples thereof include underlayer film forming materials, photoresist forming materials, antireflection film forming materials, intermediate film forming materials, and the like.
- the semiconductor film is a film used in the manufacture of semiconductors. Specifically, it is a general term for a solid layer obtained by distilling off the solvent after applying a semiconductor film-forming material, or a cured product obtained by curing the solid layer by a polymerization reaction or the like.
- the semiconductor film is composed of a semiconductor member and a semiconductor process member.
- a semiconductor member means a member that remains in a semiconductor device as a permanent film
- a semiconductor process member means a member that is used as a sacrificial film in a semiconductor manufacturing process but does not remain in the semiconductor device.
- Examples of the semiconductor members include insulating films, barrier films, sealing materials, gap fill materials, mounting films, mounting adhesives, and circuit connection materials.
- Examples of the semiconductor process members include photoresists, intermediate films, underlayer films, antireflection films, and the like.
- Photoresist, intermediate film, and underlayer film are semiconductor process members used for the purpose of obtaining good patterns. It can be used as a multilayer resist laminated in order.
- the semiconductor device means an electronic component equipped with a semiconductor, for example, a discrete (discrete semiconductor) in which one element has a single function, such as a transistor or a diode; IC (integrated circuit); memory, microprocessor (MPU), CPU such as logic IC; and the like.
- a semiconductor for example, a discrete (discrete semiconductor) in which one element has a single function, such as a transistor or a diode; IC (integrated circuit); memory, microprocessor (MPU), CPU such as logic IC; and the like.
- the compound (I) used in the present invention is a compound having a specific skeleton and is characterized by having one or more reactive groups in the molecule.
- the reactive group possessed by the compound (I) means a group capable of forming a covalent bond with another reactive group.
- the other reactive groups may be reactive groups of the same type or reactive groups of different types.
- a reactive group in the present invention means a carbon-carbon double bond, a carbon-carbon triple bond, a nitrile group, an epoxy group, an isocyanate group, a hydroxyl group, an amino group and a thiol group. That is, the reactive group in the general formula (I) is vinyl group, ethynyl group, nitrile group, epoxy group, isocyanate group, hydroxyl group, amino group or thiol group.
- a nitrile group is included in the reactive group because it can form a triazine ring through a trimerization reaction.
- the reactive group is preferably a carbon-carbon triple bond, a carbon-carbon double bond, a hydroxyl group and an epoxy group, more preferably a carbon-carbon triple bond, a carbon-carbon double bond and a phenolic hydroxyl group, particularly carbon-carbon. Triple bonds and phenolic hydroxyl groups are preferred. This is because the heat resistance of the obtained film is improved when the reactive group is the above group.
- the group having a reactive group in the general formula (I) represents a group in which one or more of the hydrogen atoms of the group that can be taken in the general formula (I) is substituted with the above reactive group, for example, allyl alkenyl groups having 2 to 10 carbon atoms such as groups; alkenyloxy groups having 2 to 10 carbon atoms such as vinyloxy groups and allyloxy groups; alkynyl groups having 2 to 10 carbon atoms such as propargyl groups; Alkynyloxy groups having 2 to 10 carbon atoms; acryloyl, methacryloyl, glycidyl, glycidyloxy, oxetanyl and the like.
- Examples of the hydrocarbon ring having 6 carbon atoms represented by A in the general formula (I) include a benzene ring, a cyclohexadiene ring, a cyclohexene ring and a cyclohexane ring.
- the aryl group having 6 to 30 carbon atoms represented by X 1 and X 2 in the general formula (I) may have a monocyclic structure or a condensed ring structure, and may further have two aromatic Group hydrocarbon rings may be linked.
- Examples of the aryl group having a condensed ring structure having 6 to 30 carbon atoms include hydrocarbon-type aromatic condensed ring groups having a structure in which two or more aromatic hydrocarbon rings are condensed and having 7 to 30 carbon atoms. .
- Examples of monocyclic aryl groups having 6 to 30 carbon atoms include phenyl, tolyl, xylyl, ethylphenyl, 2,4,6-trimethylphenyl and the like.
- Examples of hydrocarbon-type aromatic condensed ring groups having 7 to 30 carbon atoms include naphthyl, anthracenyl, phenanthryl, pyrenyl, fluorenyl and indenofluorenyl.
- the aryl group in which two aromatic hydrocarbon rings are linked may be one in which two monocyclic aromatic hydrocarbon rings are linked.
- An aromatic hydrocarbon ring may be connected, or an aromatic hydrocarbon ring having a condensed ring structure and an aromatic hydrocarbon ring having a condensed ring structure may be connected.
- a linking group that links two aromatic hydrocarbon rings includes a single bond, a sulfide group (--S--), a carbonyl group, and the like.
- Examples of the aryl group in which two monocyclic aromatic hydrocarbon rings are linked include biphenyl, diphenylsulfide, and benzoylphenyl.
- the aryl group having 6 to 30 carbon atoms may be substituted with a reactive group or a group having a reactive group.
- An aryl group having 6 to 30 carbon atoms substituted with a reactive group or a group having a reactive group means that one or more hydrogen atoms in the aryl group are substituted with a reactive group or a group having a reactive group. It means a group having 6 to 30 carbon atoms.
- the aryl group having 6 to 30 carbon atoms may have other substituents. Other substituents include halogen atoms and nitro groups.
- the heterocyclic group having 2 to 30 carbon atoms represented by X 1 and X 2 in the general formula (I) is a group obtained by removing one hydrogen atom from a heterocyclic compound. Since it is included in the reactive group, it is not included in the heterocyclic group.
- the heterocyclic group may have a monocyclic structure or a condensed ring structure. Examples of the heterocyclic group having a condensed ring structure having 2 to 30 carbon atoms include a heterocyclic ring-containing condensed ring group having a structure in which a heterocyclic ring and a heterocyclic ring or a hydrocarbon ring are condensed and having 3 to 30 carbon atoms. be done.
- heterocyclic groups include, for example, pyridyl, quinolyl, thiazolyl, tetrahydrofuranyl, dioxolanyl, tetrahydropyranyl, methylthiophenyl, hexylthiophenyl, benzothiophenyl, pyrrolyl, pyrrolidinyl, imidazolyl, imidazolidinyl, imidazolinyl, pyrazolyl, pyrazolidinyl.
- the heterocyclic group having 2 to 30 carbon atoms may be substituted with a reactive group or a group having a reactive group.
- a heterocyclic group having 2 to 30 carbon atoms substituted with a reactive group or a group having a reactive group means that at least one hydrogen atom in the heterocyclic group is substituted with a reactive group or a group having a reactive group. means a group having 2 to 30 carbon atoms.
- the heterocyclic group having 2 to 30 carbon atoms may have other substituents.
- a halogen atom, a nitro group, etc. are mentioned as a substituent.
- the heterocyclic ring-containing group having 3 to 30 carbon atoms represented by X 1 and X 2 in the general formula (I) means that one or more hydrogen atoms in the hydrocarbon group are substituted with a heterocyclic group. It means a group having 3 to 30 carbon atoms.
- Examples of the heterocyclic group include the groups exemplified as the heterocyclic group having 2 to 30 carbon atoms.
- Hydrocarbon groups include hydrocarbon groups having 1 to 20 carbon atoms. A hydrocarbon group having 1 to 20 carbon atoms will be described later.
- the heterocyclic ring-containing group having 3 to 30 carbon atoms may be substituted with a reactive group or a group having a reactive group.
- a heterocyclic ring-containing group having 3 to 30 carbon atoms substituted with a reactive group or a group having a reactive group means that at least one of the hydrogen atoms in the heterocyclic ring-containing group is a reactive group or a group having a reactive group. means a group having 3 to 30 carbon atoms substituted with
- the heterocyclic ring-containing group having 3 to 30 carbon atoms may have other substituents.
- a halogen atom, a nitro group, etc. are mentioned as a substituent.
- the hydrocarbon group having 1 to 20 carbon atoms is a group having 1 to 20 carbon atoms consisting of carbon atoms and hydrogen atoms.
- Examples of hydrocarbon groups having 1 to 20 carbon atoms include aliphatic hydrocarbon groups having 1 to 20 carbon atoms and aromatic hydrocarbon ring-containing groups having 6 to 20 carbon atoms.
- a reactive group or a group having a reactive group that is, a vinyl group, an ethynyl group, and a group having these groups are not included in the above hydrocarbon groups.
- Examples of the aliphatic hydrocarbon group having 1 to 20 carbon atoms include an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms and a cycloalkylalkyl group having 4 to 20 carbon atoms. be done.
- the alkyl group having 1 to 20 carbon atoms may be linear or branched.
- Straight chain alkyl groups include methyl, ethyl, propyl, butyl, iso-amyl, tert-amyl, hexyl, heptyl and octyl.
- Branched alkyl groups include iso-propyl, sec-butyl, tert-butyl, iso-butyl, iso-pentyl, tert-pentyl, 2-hexyl, 3-hexyl, 2-heptyl, 3-heptyl and iso-heptyl.
- tert-heptyl iso-octyl, tert-octyl, 2-ethylhexyl, nonyl, isononyl, decyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, hebrotadecyl, octadecyl and the like.
- Cycloalkyl groups having 3 to 20 carbon atoms include saturated monocyclic alkyl groups having 3 to 20 carbon atoms, saturated polycyclic alkyl groups having 3 to 20 carbon atoms, and hydrogen atoms in the rings of these groups. Examples include groups having 4 to 20 carbon atoms in which one or more atoms are substituted with an alkyl group.
- Examples of the saturated monocyclic alkyl groups include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl and cyclodecyl.
- the above saturated polycyclic alkyl groups include adamantyl, decahydronaphthyl, octahydropentalene, bicyclo[1.1.1]pentanyl and the like.
- Examples of the alkyl group substituting a hydrogen atom in the ring of the saturated monocyclic or saturated polycyclic alkyl group include the groups exemplified above for the alkyl group having 1 to 20 carbon atoms.
- Examples of a group in which one or more hydrogen atoms in the ring of a saturated polycyclic alkyl group are substituted with an alkyl group include bornyl and the like.
- a cycloalkylalkyl group having 4 to 20 carbon atoms means a group having 4 to 20 carbon atoms in which a hydrogen atom of an alkyl group is substituted with a cycloalkyl group.
- a cycloalkyl group in a cycloalkylalkyl group may be monocyclic or polycyclic.
- the monocyclic cycloalkylalkyl groups having 4 to 20 carbon atoms include, for example, cyclopropylmethyl, 2-cyclobutylethyl, 3-cyclopentylpropyl, 4-cyclohexylbutyl, cycloheptylmethyl and cyclooctyl.
- the polycyclic cycloalkylalkyl groups having 4 to 20 carbon atoms include 3-3-adamantylpropyl and decahydronaphthylpropyl.
- the aromatic hydrocarbon ring-containing group having 6 to 20 carbon atoms is a hydrocarbon group containing an aromatic hydrocarbon ring and not containing a heterocyclic ring, and may have an aliphatic hydrocarbon group.
- aromatic hydrocarbon ring-containing groups include aryl groups having 6 to 20 carbon atoms and arylalkyl groups having 7 to 20 carbon atoms.
- Examples of the aryl group having 6 to 20 carbon atoms include the groups exemplified as the aryl group having 6 to 30 carbon atoms represented by X 1 and X 2 .
- An arylalkyl group having 7 to 20 carbon atoms means a group in which one or more hydrogen atoms in an alkyl group are substituted with an aryl group.
- Examples of arylalkyl groups having 7 to 20 carbon atoms include benzyl, fluorenyl, indenyl, 9-fluorenylmethyl, ⁇ -methylbenzyl, ⁇ , ⁇ -dimethylbenzyl, phenylethyl and naphthylpropyl groups. .
- the hydrocarbon group having 1 to 20 carbon atoms represented by R 1 etc. in the general formula (I) may have a substituent.
- a halogen atom, a nitro group, etc. are mentioned as a substituent.
- the number of carbon atoms when having a substituent represents the number of carbon atoms in the entire group.
- R 1 etc. in the general formula (I) is a group in which one or more methylene groups in the hydrocarbon group having 1 to 20 carbon atoms are substituted with a divalent group selected from the ⁇ group A>. , or a group in which one or more methylene groups in the heterocyclic ring-containing group having 3 to 30 carbon atoms are substituted with a divalent group selected from ⁇ Group A>.
- the number of carbon atoms in these groups represents the number of carbon atoms in the hydrocarbon group and heterocyclic ring-containing group before the methylene group is substituted.
- hydrocarbon groups having 1 to 20 carbon atoms represented by R 11 and R 12 in the general formula (I) are the hydrocarbon groups having 1 to 20 carbon atoms represented by R 1 etc. in the general formula (I). Same as hydrocarbon group.
- the compound (I) is preferably a compound represented by the following general formula (Ia), (Ib) or (Ic).
- the compound represented by the general formula (Ia), in which A in the general formula (I) is a benzene ring, is preferable because the heat resistance and solvent resistance of the obtained film are more excellent.
- X 1 and X 2 in the general formula (I) are monocyclic aryl groups having 6 to 30 carbon atoms, which may be substituted with reactive groups or groups having reactive groups;
- a compound having a hydrocarbon-type aromatic condensed ring group of 7 to 30 carbon atoms or a heterocyclic ring-containing condensed ring group of 3 to 30 carbon atoms is preferable because a film having more excellent heat resistance can be obtained.
- a phenyl group is particularly preferable because of its high solubility in solvents.
- the hydrocarbon-type aromatic condensed ring group having 7 to 30 carbon atoms is a condensed ring containing an aromatic ring consisting only of carbon atoms and hydrogen atoms, and the atoms constituting the ring structure of the condensed ring are carbon Atoms only.
- Examples of hydrocarbon-type aromatic condensed rings having 7 to 30 carbon atoms include naphthyl group, anthracenyl group, pyrenyl group, tetracenyl group, triphenylenyl group, azulenyl group, phenanthrenyl group, tetracenyl group, perylenyl group and fluorenyl group.
- a naphthyl group and a fluorenyl group are preferred because of their high solubility in solvents.
- the condensed ring group containing a heterocyclic ring having 3 to 30 carbon atoms is a condensed ring containing a heterocyclic ring and having 3 to 30 carbon atoms.
- the heterocyclic ring-containing condensed ring group having 3 to 30 carbon atoms include indolyl group, carbazolyl group, benzofuranyl group, benzothiophenyl group, benzopyrazoyl group, julolidinyl group and benzoquinolinyl group, which are highly soluble in solvents. Therefore, an indolyl group, a carbazolyl group, and a benzothiophenyl group are preferable.
- the compound in which X 1 and X 2 in the general formula (I) are each independently a reactive group or a group that may be substituted with a group having a reactive group has heat resistance.
- a compound in which X 1 and X 2 are each independently substituted with a reactive group or a group having a reactive group is preferable because an excellent film can be obtained, and a reactive group or a group having a reactive group is more preferable.
- Compounds which are substituted aryl groups of 6 to 30 carbon atoms are particularly preferred.
- X 1 and X 2 are an aryl group having 6 to 30 carbon atoms substituted with a reactive group or a group having a reactive group
- the aryl group includes a phenyl group, a biphenyl group, a naphthyl group, an anthracenyl group, A pyrenyl group or a fluorenyl group is preferable because a film having excellent heat resistance can be obtained.
- X 1 or X 2 is an aryl group having 6 to 30 carbon atoms substituted with a reactive group or a group having a reactive group
- the number of reactive groups or groups having a reactive group is one, respectively. or two are preferred.
- the reactive group is preferably a carbon-carbon triple bond because a film with excellent heat resistance can be obtained.
- the group having a carbon-carbon triple bond an alkynyl group having 2 to 10 carbon atoms and an alkynyloxy group having 2 to 10 carbon atoms are preferable, and a propargyl group and a propargyloxy group are more preferable.
- the reactive group is preferably a hydroxyl group because a film having excellent heat resistance can be obtained, and X 1 and X 2 are carbon atoms substituted with a hydroxyl group.
- a compound having 6 to 30 aryl groups, that is, an aryl group having 6 to 30 carbon atoms and a phenolic hydroxyl group is more preferred.
- X 1 and X 2 may be the same group or different groups, but are preferably the same group from the viewpoint of compound synthesis.
- R 5 and R 10 in the general formula (I) are a hydrocarbon group having 1 to 20 carbon atoms substituted with a reactive group.
- the reactive group is preferably a carbon-carbon triple bond or a carbon-carbon double bond, since a film having excellent heat resistance can be obtained.
- a carbon-carbon triple bond is preferred.
- the hydrocarbon group having 1 to 20 carbon atoms substituted with a carbon-carbon triple bond is preferably an alkynyl group having 3 to 10 carbon atoms, more preferably a propargyl group.
- R 1 , R 2 , R 3 , R 4 , R 6 , R 7 , R 8 and R 9 are preferably hydrogen atoms from the viewpoint of compound synthesis.
- the compound of the present invention preferably has 3 or more reactive groups in the molecule in order to obtain a film with excellent heat resistance, and particularly preferably has 4 to 6 reactive groups.
- 3 or more reactive groups in the molecule when X 1 and X 2 each have two reactive groups, X 1 and X 2 each have two reactive groups, and R 5 and R 10 have a reactive group, X 1 and X 2 each have one reactive group, and R 5 and R 10 each have a reactive group.
- X 1 and X 2 in general formula (I) are preferably groups having reactive groups. It is also preferred that X 1 , X 2 , R 5 and R 10 in general formula (I) are groups having reactive groups.
- Specific examples of the compound (I) include the following compounds (1) to (215).
- the compound (I) can be produced by a known method. Specifically, an indole and an aldehyde compound are condensed using an acid catalyst to produce a tetrahydroindolocarbazole compound corresponding to a compound in which A in the general formula (I) is a cyclohexadiene ring. can. Furthermore, by oxidizing the tetrahydroindolocarbazole compound with an oxidizing agent such as iodine and chloranil, a dihydroindolocarbazole compound corresponding to the compound in which A in the general formula (I) is a benzene ring can be produced. .
- an oxidizing agent such as iodine and chloranil
- the compound (I) can be produced by introducing a reactive group to the amino group in these indolocarbazole compounds.
- X 1 and X 2 in the general formula (I) are phenyl groups
- R 5 and R 10 are reactive groups R
- R A compound in which 7 , R 8 and R 9 are hydrogen atoms can be produced as follows.
- a compound having a phenolic hydroxyl group in which X 1 and X 2 in the general formula (I) are hydroxyphenyl groups, can be produced. Furthermore, by introducing reactive groups R into the hydroxyl group and amino group of this compound, a compound having three or more reactive groups R in the molecule can be produced.
- the polymer (I) used in the present invention may be a homopolymer of the compound (I) or a copolymer with other monomers.
- the polymer (I) is represented by the following general formula (II) and contains a structural unit having one or more reactive groups (hereinafter also referred to as “structural unit (II)”). It is preferably a coalescence (hereinafter also referred to as “polymer (II)").
- structural unit (II) a structural unit having one or more reactive groups
- X 1 and X 2 in general formula (II) are preferably groups having reactive groups.
- X 1 , X 2 , R 5 and R 10 in general formula (II) are groups having reactive groups.
- R 21 and R 22 are each independently a halogen atom, a reactive group, a nitro group, a cyano group, a hydrocarbon group having 1 to 20 carbon atoms optionally substituted by a reactive group, or a reactive group substituted a heterocyclic group having 2 to 10 carbon atoms which may be substituted, or a heterocyclic ring-containing group having 3 to 30 carbon atoms which may be substituted by a reactive group, or the above hydrocarbon having 1 to 20 carbon atoms
- a group in which one or more methylene groups in the group are substituted with a divalent group selected from ⁇ Group B> below, or one or more methylene groups in the heterocyclic ring-containing group having 3 to 30 carbon atoms represents a group substituted with a divalent group selected from the following ⁇ group B>
- R 23 and R 24 are each independently a hydrogen atom, a halogen atom, a reactive group, a nitro group, a cyano group, a hydrocarbon
- Hydrocarbon groups having 1 to 20 carbon atoms represented by R 21 , R 22 , R 23 , R 24 , R 25 and R 26 in general formula (II) include The groups exemplified as the hydrocarbon group having 1 to 20 carbon atoms represented by R 1 etc. can be mentioned.
- the heterocyclic group having 2 to 10 carbon atoms and the heterocyclic ring-containing group having 3 to 30 carbon atoms represented by R 21 , R 22 , R 23 and R 24 in the general formula (II) Examples include the groups exemplified as the heterocyclic group having 2 to 10 carbon atoms and the heterocyclic ring-containing group having 3 to 30 carbon atoms represented by R 1 etc. in formula (I).
- the structural unit (II) is preferably a structural unit represented by the following general formula (IIa), (IIb) or (IIc) and having one or more reactive groups.
- a and b in the general formula (II) are 0 because a film having excellent heat resistance can be obtained. That a and b are 0 is synonymous with that R 1 , R 2 , R 3 , R 4 , R 6 , R 7 , R 8 and R 9 in the general formula (I) are hydrogen atoms. be.
- the weight-average molecular weight of the polymer is preferably 500 or more and less than 30,000 because it has excellent solubility in a solvent and provides a film having excellent heat resistance, and is preferably 700 or more and less than 15,000. is more preferable, and 1,000 or more and less than 10,000 is particularly preferable because solubility in a solvent and film-forming properties are good.
- the weight-average molecular weight is a polystyrene-equivalent molecular weight measured by gel permeation chromatography (GPC).
- Weight average molecular weight for example, using GPC (LC-2000plus series) manufactured by JASCO Corporation, tetrahydrofuran as the elution solvent, and Mw 1,110,000, 707,000, 397 as the polystyrene standard for the calibration curve. , 000, 189,000, 98,900, 37,200, 15,700, 9,490, 5,430, 3,120, 1,010, 589 (TSKgel standard polystyrene manufactured by Tosoh Corporation), and a measurement column can be measured as KF-804, KF-803, and KF-802 (manufactured by Showa Denko KK).
- structural unit (II) include the following structural units (u1) to (u101).
- the polymer (II) can be produced by condensation reaction of the compound (I) and an aldehyde or ketone in the presence of an acid catalyst.
- acid catalysts used in the condensation reaction include inorganic acids such as sulfuric acid, hydrochloric acid, hydrobromic acid, phosphoric acid and heteropolyacid, methanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid and p-toluene.
- Organic acids such as sulfonic acid monohydrate, formic acid, oxalic acid, oxalic acid dihydrate, trifluoromethanesulfonic acid, aluminum trichloride, aluminum ethoxide, aluminum isopropoxide, boron trifluoride, boron trichloride, Examples include Lewis acids such as boron tribromide, tin tetrachloride, tin tetrabromide, titanium tetrachloride, titanium tetrabromide, and titanium oxide.
- R 23 and R 24 in the structural unit (II) are groups derived from aldehyde or ketone, which are raw materials of the polymer.
- aldehyde or ketone which are raw materials of the polymer.
- formaldehyde gives a polymer in which R 23 and R 24 are hydrogen atoms.
- benzaldehyde is used, a polymer is obtained in which R 23 is a phenyl group and R 24 is a hydrogen atom.
- R23 is naphthyl group, anthracenyl group, pyrenyl group or fluorenyl group, respectively, and R24 is a hydrogen atom.
- a polymer is obtained.
- a polymer in which neither R 23 nor R 24 in the structural unit (II) is a hydrogen atom can be obtained by using a ketone.
- Ketones include diaryl ketones and alkyl aryl ketones, for example, diphenyl ketone gives a polymer in which R 23 and R 24 are phenyl groups, methyl phenyl ketone gives a polymer in which R 23 is a methyl group. and a polymer is obtained in which R 24 is a phenyl group.
- a polymer in which R 23 and R 24 in the general formula (I) are directly bonded to each other to form a ring can be obtained by using a cyclic ketone.
- fluorenone gives a polymer in which R 23 and R 24 are phenyl groups and are directly bonded to each other to form a ring.
- the amount of the aldehyde and ketone to be used may be adjusted so that the resulting polymer has the desired molecular weight and copolymerization ratio. preferably 0.3 to 1.0 mol.
- the condensation reaction may be carried out without a solvent, it is usually carried out using a solvent.
- Any solvent can be used as long as it does not inhibit the reaction.
- alcohols such as methanol, ethanol, isopropyl alcohol, butanol, ethylene glycol, propylene glycol, diethylene glycol, ethylene glycol monomethyl ether, propylene glycol monomethyl ether, ethers such as diethylene glycol dimethyl ether, 1,4-dioxane, tetrahydrofuran, methylene chloride , halogen solvents such as chloroform and dichloroethane, hydrocarbons such as toluene and xylene, ketones such as ethyl methyl ketone and isobutyl methyl ketone, esters such as ethyl acetate, butyl acetate and propylene glycol methyl ether acetate, acetonitrile, Aprotic polar solvents such as dimethylsulfoxide,
- the reaction temperature of the condensation reaction is usually 50 to 200°C, preferably 100 to 200°C in terms of reaction time.
- the reaction time may be adjusted depending on the amount of catalyst, reaction temperature, etc., and is usually 30 minutes to 50 hours.
- the solvent used in the present invention may be a solvent capable of dissolving or dispersing the compound (I) and the polymer (I).
- examples include methyl ethyl ketone, methyl amyl ketone, diethyl ketone, acetone, methyl ketones such as isobutyl ketone, cyclohexanone, 2-heptanone; ether solvents such as ethyl ether, dioxane, tetrahydrofuran, 1,2-dimethoxyethane, 1,2-diethoxyethane, dipropylene glycol dimethyl ether; methyl acetate, ethyl acetate , Ester solvents such as n-propyl acetate, isopropyl acetate, n-butyl acetate, cyclohexyl acetate, ethyl lactate, dimethyl succinate, and texanol; cellosolve solvents such as ethylene glycol monomethyl
- ketones, ether ester solvents, etc. especially propylene glycol monomethyl ether acetate, cyclohexanone, etc. are preferable because they have good solubility of the compound (I) and the polymer (I).
- the content of the solvent is preferably 50 parts by mass or more and 99 parts by mass or less, more preferably 70 parts by mass or more and 95 parts by mass or less, in 100 parts by mass of the semiconductor film-forming material.
- the semiconductor film-forming material of the present invention is characterized by containing the compound (I) or the polymer (I). By containing the compound (I) or the polymer (I), a semiconductor film having excellent heat resistance can be obtained.
- a semiconductor film-forming material containing 20 to 100% by mass of the compound (I) and the polymer (I) as a total solid content is preferable because a film having excellent heat resistance can be obtained.
- the content in solid content is more preferably 40 to 100% by mass, and particularly preferably 60 to 100% by mass.
- solid content refers to components other than the solvent in the film-forming material for semiconductors.
- the semiconductor film-forming material of the present invention may contain a compound other than the compound (I).
- a compound other than the compound (I) examples include condensed ring compounds such as fluorene compounds, bisphenol compounds, xanthene compounds, naphthalene compounds and anthracene compounds, and biphenyl compounds. Among these compounds, the following compounds (a) to (s) are particularly preferred.
- the content of the other compound is preferably 20% by mass or less in the solid content.
- the film-forming material for a semiconductor of the present invention may contain a polymer other than the polymer (I).
- a polymer other than the polymer (I) examples thereof include polymers containing condensed ring compounds such as fluorene compounds, bisphenol compounds, xanthene compounds, naphthalene compounds and anthracene compounds, and biphenyl compounds as monomers.
- particularly preferred are polymers containing the following structural units (u201) to (u210).
- the content of the other polymer is preferably 20% by mass or less in the solid content.
- the film-forming material for semiconductors of the present invention may contain a cross-linking agent.
- the cross-linking agent reacts with those having a reactive group among the compound (I) and the polymer (I) to link a plurality of molecules by chemical bonding, and is incorporated into the polymer after the polymerization reaction, resulting in physical, It means a compound that changes its chemical properties.
- a cross-linking agent By containing a cross-linking agent, a cured product having more excellent heat resistance can be obtained.
- cross-linking agents include phenol compounds, epoxy compounds, cyanate compounds, amine compounds, benzoxazine compounds, melamine compounds, guanamine compounds, glycoluril compounds, urea compounds, isocyanate compounds, azide compounds, and the like.
- Phenolic compounds include, for example, phenol, cresols, alkylphenols such as xylenols; bisphenol A, bisphenol F, bis(3-methyl-4-hydroxyphenyl)propane, bis(4-hydroxyphenyl)-1-phenylethane bisphenols such as; ⁇ , ⁇ , ⁇ '-tris(4-hydroxyphenyl)-1-ethyl-4-isopropylbenzene and other trisphenols; phenolic novolak resins, phenolaralkyl resins and other phenolic resins; Resinous phenol derivatives such as straight-chain trisphenols, methane-type trisphenols, straight-chain tetrakisphenols, and radial hexanuclear compounds represented by the formulas may be mentioned.
- R 13 represents an alkyl group having 1 to 4 carbon atoms
- n represents an integer of 0 to 2
- m represents an integer of 0 to 1.
- epoxy compounds include glycidyl ether of the phenol compound, tris(2,3-epoxypropyl) isocyanurate, trimethylolmethane triglycidyl ether, and trimethylolpropane triglycidyl ether.
- cyanate resins include compounds obtained by substituting hydroxyl groups of the above phenol compounds with cyanate groups.
- Amine compounds include m-phenylenediamine, p-phenylenediamine, 4,4′-diaminodiphenylmethane, 4,4′-diaminodiphenylpropane, 4,4′-diaminodiphenyl ether, 1,3-bis(4-aminophenoxy ) aromatic amines such as benzene; alicyclic amines such as diaminocyclohexane, diaminodicyclohexylmethane, diaminodicyclohexylpropane, diaminobicyclo[2.2.1]heptane and isophoronediamine; ethylenediamine, hexamethylenediamine, octamethylenediamine , decamethylenediamine, diethylenetriamine, and triethylenetetramine.
- benzoxazine compounds examples include Pd-type benzoxazines obtained from diamine compounds and monofunctional phenol compounds, and Fa-type benzoxazines obtained from amine compounds and bifunctional phenol compounds.
- Melamine compounds include, for example, hexamethylolmelamine, hexamethoxymethylmelamine, compounds in which 1 to 6 methylol groups of hexamethylolmelamine are methoxymethylated, or mixtures thereof, hexamethoxyethylmelamine, hexaacyloxymethylmelamine, and hexamethylol.
- guanamine compounds include tetramethylolguanamine, tetramethoxymethylguanamine, compounds in which 1 to 4 methylol groups of tetramethylolguanamine are methoxymethylated, or mixtures thereof, tetramethoxyethylguanamine, tetraacyloxyguanamine, and tetramethylolguanamine. and a compound in which 1 to 4 methylol groups of are acyloxymethylated or a mixture thereof.
- glycoluril compounds include tetramethylolglycoluril, tetramethoxyglycoluril, tetramethoxymethylglycoluril, compounds in which 1 to 4 methylol groups of tetramethylolglycoluril are methoxymethylated, or mixtures thereof, and tetramethylolglycoluril. and a compound in which 1 to 4 methylol groups of are acyloxymethylated or a mixture thereof.
- Urea compounds include, for example, tetramethylol urea, tetramethoxymethyl urea, compounds in which 1 to 4 methylol groups of tetramethylol urea are methoxymethylated, or mixtures thereof, tetramethoxyethyl urea, and the like.
- isocyanate compounds include tolylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, cyclohexane diisocyanate, and the like.
- Azide compounds include 1,1'-biphenyl-4,4'-bisazide, 4,4'-methylidenebisazide, 4,4'-oxybisazide and the like.
- a compound having a hydroxyl group or a thiol group is preferable because a cured product having excellent heat resistance can be obtained, and examples thereof include the phenol compound and the glycoluril compound.
- the content of the cross-linking agent is preferably 0.1 to 20 parts by mass, preferably 1 to 10 parts by mass, with respect to 100 parts by mass of compound (I) and polymer (I). . If the content is less than the above range, the effect of improving the heat resistance may not be sufficiently exhibited.
- the film-forming material for semiconductors of the present invention may contain a polymerization initiator.
- the polymerization initiator means a compound capable of initiating polymerization by generating active species by heating or irradiation with active energy rays, and known polymerization initiators can be used.
- Polymerization initiators include acid generators, base generators and radical polymerization initiators. Acceleration of curing of the semiconductor film-forming material can be expected by containing the polymerization initiator.
- Polymerization initiators can be classified into photopolymerization initiators that generate active species when irradiated with active energy rays, and thermal polymerization initiators that generate active species when heated.
- Photopolymerization initiators include photoacid generators, photobase generators and photoradical polymerization initiators, and thermal polymerization initiators include thermal acid generators, thermal base generators and thermal radical polymerization initiators. be done.
- the film-forming material for semiconductors of the present invention may contain an acid generator as a polymerization initiator in order to accelerate the curing reaction of the cross-linking agent.
- Any acid generator may be used as long as it is a compound capable of generating an acid under prescribed conditions, and examples thereof include onium salts such as sulfonium salts, iodonium salts and ammonium salts.
- the acid generator may be either a thermal acid generator that generates acid by heat or a photoacid generator that generates acid by light. Acid generators are particularly preferred.
- Specific thermal acid generators include bis(4-tert-butylphenyl)iodonium nonafluorobutanesulfonate, tetramethylammonium trifluoromethanesulfonate, tetramethylammonium nonafluorobutanesulfonate, and triethylammonium nonafluorobutanesulfonate.
- pyridinium nonafluorobutanesulfonate triethylammonium camphorsulfonate, pyridinium camphorsulfonate, tetra-n-butylammonium nonafluorobutanesulfonate, tetraphenylammonium nonafluorobutanesulfonate, tetramethylammonium p-toluenesulfonate, trifluoromethane Diphenyliodonium sulfonate, (p-tert-butoxyphenyl)phenyliodonium trifluoromethanesulfonate, diphenyliodonium p-toluenesulfonate, (p-tert-butoxyphenyl)phenyliodonium p-toluenesulfonate, triphenyl trifluoromethanesulfonate Sulfonium, (p-tert-but
- a photoacid generator is a compound that generates an acid when exposed to light.
- the photoacid generator include compounds that generate acids upon exposure to radiation such as visible light, ultraviolet rays, far ultraviolet rays, electron beams, and X-rays.
- Known compounds such as acid ester compounds, quinonediazide compounds, sulfonimide compounds, and diazomethane compounds can be mentioned.
- the photoacid generator is preferably at least one selected from the group consisting of an onium salt compound, a sulfonimide compound, and a diazomethane compound, more preferably an onium salt compound, and a triaryl Sulfonium salts are more preferred.
- onium salt compounds examples include diaryliodonium salts, triarylsulfonium salts, and triarylphosphonium salts.
- diaryliodonium salts include diphenyliodonium tetrafluoroborate, diphenyliodonium hexafluorophosphonate, diphenyliodonium hexafluoroantimonate, diphenyliodonium hexafluoroarsenate, diphenyliodonium trifluoromethanesulfonate, and diphenyliodonium trifluoroacetate.
- diphenyliodonium-p-toluenesulfonate and other diphenyliodonium salts 4-methoxyphenylphenyliodonium tetrafluoroborate, 4-methoxyphenylphenyliodonium hexafluorophosphonate, 4-methoxyphenylphenyliodonium hexafluoroantimonate, 4-methoxyphenyl 4-methoxyphenylphenyliodonium salts such as phenyliodonium hexafluoroarsenate, 4-methoxyphenylphenyliodonium trifluoromethanesulfonate, 4-methoxyphenylphenyliodonium trifluoroacetate, 4-methoxyphenylphenyliodonium-p-toluenesulfonate; Bis(4-tert-butylphenyl)iodonium tetrafluoroborate, 4-me
- triarylsulfonium salts examples include triphenylsulfonium tetrafluoroborate, triphenylsulfonium hexafluorophosphonate, triphenylsulfonium hexafluoroantimonate, triphenylsulfonium hexafluoroarsenate, triphenylsulfonium trifluoromethanesulfonate, triphenyl triphenylsulfonium salts such as sulfonium trifluoroacetate, triphenylsulfonium-p-toluenesulfonate; 4-methoxyphenyldiphenylsulfonium tetrafluoroborate, 4-methoxyphenyldiphenylsulfonium hexafluorophosphonate, 4-methoxyphenyldiphenylsulfonium hexafluoroantimo 4-methoxyphenyldiphenyl
- Methoxyphenyldiphenylsulfonium salts 4-phenylthiophenyldiphenylsulfonium tetrafluoroborate, 4-phenylthiophenyldiphenylsulfonium hexafluorophosphonate, 4-phenylthiophenyldiphenylsulfonium hexafluoroantimonate, 4-phenylthiophenyldiphenylsulfonium hexafluoroarsenate 4-phenylthiophenyldiphenylsulfonium salts such as phosphate, 4-phenylthiophenyldiphenylsulfonium trifluoromethanesulfonate, 4-phenylthiophenyldiphenylsulfonium trifluoroacetate, 4-phenylthiophenyldiphenylsulfonium-p-toluenesulfonate, etc. mentioned.
- triarylphosphonium salts examples include triphenylphosphonium tetrafluoroborate, triphenylphosphonium hexafluorophosphonate, triphenylphosphonium hexafluoroantimonate, triphenylphosphonium hexafluoroarsenate, triphenylphosphonium trifluoromethanesulfonate, triphenyl Triphenylphosphonium salts such as phosphonium trifluoroacetate, triphenylphosphonium-p-toluenesulfonate; 4-methoxyphenyldiphenylphosphonium tetrafluoroborate, 4-methoxyphenyldiphenylphosphonium hexafluorophosphonate, 4-methoxyphenyldiphenylphosphonium hexafluoroantimo 4-methoxyphenyldiphenylphosphonium hexafluoroarsenate, 4-methoxyphenyldipheny
- Methoxyphenyldiphenylphosphonium salts tris(4-methoxyphenyl)phosphonium tetrafluoroborate, tris(4-methoxyphenyl)phosphonium hexafluorophosphonate, tris(4-methoxyphenyl)phosphonium hexafluoroantimonate, tris(4-methoxyphenyl) Tris (4 -Methoxyphenyl)phosphonium salts and the like.
- sulfonimide compounds include N-(trifluoromethylsulfonyloxy)succinimide, N-(trifluoromethylsulfonyloxy)phthalimide, N-(trifluoromethylsulfonyloxy)diphenylmaleimide, N-(trifluoromethylsulfonyl oxy)bicyclo-[2,2,1]-hept-5-ene-2,3-dicarboximide, N-(trifluoromethylsulfonyloxy)-7-oxabicyclo-[2,2,1]-hept -5-ene-2,3-dicarboximide, N-(trifluoromethylsulfonyloxy)bicyclo-[2,2,1]-heptane-5,6-oxy-2,3-dicarboximide, N- (trifluoromethylsulfonyloxy) sulfonimide compounds having an N- (trifluoromethylsulfonyloxy)
- diazomethane compounds include bis(trifluoromethylsulfonyl)diazomethane, bis(cyclohexylsulfonyl)diazomethane, bis(phenylsulfonyl)diazomethane, bis(p-toluenesulfonyl)diazomethane, methylsulfonyl-p-toluenesulfonyldiazomethane, 1 -cyclohexylsulfonyl-1-1,1-dimethylethylsulfonyl)diazomethane, bis(1,1-dimethylethylsulfonyl)diazomethane and the like.
- a commercially available product can also be used as the photoacid generator.
- Commercial products of photocationic polymerization initiators include, for example, "Kayarad (registered trademark) PCI-220" and “Kayarad (registered trademark) PCI-620” manufactured by Nippon Kayaku Co., Ltd.; “UVI” manufactured by Dow Chemical Co., Ltd. -6990”; “ADEKA Arkles (registered trademark) SP-150", “ADEKA Arkles (registered trademark) SP-170”, “ADEKA Arkles (registered trademark) SP-500”, “ADEKA Arkles” manufactured by ADEKA Co., Ltd.
- the content of the acid generator is preferably 0.001 to 50 parts by mass, preferably 0.01 to 20 parts by mass, based on 100 parts by mass of the total solid content.
- a composition having excellent curability can be obtained, and a cured product having excellent heat resistance and solvent resistance can be obtained.
- the composition of the present invention may contain a base generator as a polymerization initiator in order to accelerate the curing reaction of the cross-linking agent.
- the base generator may be any compound as long as it can generate a base under predetermined conditions. Thermal base generators that generate bases by heat and photobase generators that generate bases by light. However, a thermal base generator that generates a base by heat is particularly preferred because of its good curability.
- Thermal base generators include carbamate derivatives such as 2-(4-biphenyl)-2-propyl carbamate and 1,1-dimethyl-2-cyanoethyl carbamate, urea such as urea and N,N,N'-trimethylurea.
- carbamate derivatives such as 2-(4-biphenyl)-2-propyl carbamate and 1,1-dimethyl-2-cyanoethyl carbamate
- urea such as urea and N,N,N'-trimethylurea
- dihydropyridine derivatives such as 1,4-dihydronicotinamide, dicyandiamide
- salts composed of acids and bases such as organic salts and inorganic salts.
- photobase generators examples include carbamate compounds, ⁇ -aminoketone compounds, quaternary ammonium compounds, O-acyloxime compounds, aminocyclopropenone compounds and the like.
- carbamate compounds include 1-(2-anthraquinonyl)ethyl 1-piperidinecarboxylate, 1-(2-anthraquinonyl)ethyl 1H-2-ethylimidazole-1-carboxylate, 9-anthrylmethyl 1-piperidinecarboxylate, 9-anthrylmethyl N,N-diethylcarbamate, 9-anthrylmethyl N-propylcarbamate, 9-anthrylmethyl N-cyclohexylcarbamate, 9-anthrylmethyl 1H-imidazole-1-carboxylate, 9- anthrylmethyl N,N-dioctylcarbamate, 9-anthrylmethyl 1-(4-hydroxypiperidine)carboxylate, 1-pyrenylmethyl 1-piperidinecarboxylate, bis[1-(2-anthraquinonyl)ethyl] 1,6- hexanediylbiscarbamate, bis(9-anthrylmethyl)
- ⁇ -aminoketone compounds include 1-phenyl-2-(4-morpholinobenzoyl)-2-dimethylaminobutane, 2-(4-methylthiobenzoyl)-2-morpholinopropane and the like.
- quaternary ammonium compounds that serve as photobase generators include 1-(4-phenylthiophenacyl)-1-azonia-4-azabicyclo[2,2,2]octanetetraphenylborate, 5-(4- phenylthiophenacyl)-1-aza-5-azoniabicyclo[4,3,0]-5-nonenetetraphenylborate, 8-(4-phenylthiophenacyl)-1-aza-8-azoniabicyclo[5,4 ,0]-7-undecenetetraphenylborate and the like.
- propenone 2-imidazolyl-3-phenylcyclopropenone, 2-isopropylamino-3-phenylcyclopropenone and the like.
- the content of the base generator is preferably 0.001 to 50 parts by mass, preferably 0.01 to 20 parts by mass, based on 100 parts by mass of the total solid content.
- a composition having excellent curability can be obtained, and a cured product having excellent heat resistance and solvent resistance can be obtained.
- the composition of the present invention may contain a radical polymerization initiator as a polymerization initiator.
- a radical polymerization initiator both a photoradical polymerization initiator and a thermal radical polymerization initiator can be used.
- photoradical polymerization initiators include benzoin such as benzoin, benzoin methyl ether, benzoin propyl ether, and benzoin butyl ether; benzyl ketals such as benzyl dimethyl ketal; acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2 , 2-diethoxy-2-phenylacetophenone, 1-benzyl-1-dimethylamino-1-(4′-morpholinobenzoyl)propane, 2-morpholyl-2-(4′-methylmercapto)benzoylpropane, 2-methyl- 1-[4-(methylthio)phenyl]-2-morpholino-propan-1-one, 1-hydroxycyclohexylphenylketone, 1-hydroxy-1-benzoylcyclohexane, 2-hydroxy-2-benzoylpropane, 2-hydroxy- Acetophenones such as 2-(4′-isopropyl)benzoylpropane,
- Benzophenones such as benzophenone, methylbenzophenone, 4,4'-dichlorobenzophenone, 4,4'-bisdiethylaminobenzophenone, Michler's ketone and 4-benzoyl-4'-methyldiphenylsulfide; 2,4,6-trimethyl Oxides such as benzoyldiphenylphosphine oxide and bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide; Carbazoles such as 3-(2-methyl-2-morpholinopropionyl)-9-methylcarbazole; benzyl, benzoyl ⁇ -dicarbonyls such as methyl formate; 3798008, WO2006/018973, JP 2011-132215, WO2015 / oxime esters such as compounds described in JP-A-152153; p-methoxyphenyl-2,4-bis(trichloromethyl)-s-triazine, 2-methyl-4,6-bis(
- Thermal radical polymerization initiators include, for example, benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, 1,1-di(t-butylperoxy)-3,3,5-trimethylcyclohexane, 4,4-di Peroxides such as (t-butylperoxy)butyl valerate and dicumyl peroxide; azo compounds such as 2,2'-azobisisobutyronitrile; and tetramethylthirium disulfide.
- the content of the radical polymerization initiator is such that a composition having excellent curability and heat resistance and solvent resistance of the cured product can be obtained, so the compound (I) having a carbon-carbon double bond and the polymer (I) 0.1 to 20 parts by mass is preferable, 0.5 to 15 parts by mass is more preferable, and 1 to 10 parts by mass is even more preferable with respect to the total 100 parts by mass of the above.
- the film-forming material for a semiconductor of the present invention may contain other components, if necessary, in addition to the components described above.
- Other ingredients include inorganic fillers, organic fillers, silane coupling agents, colorants, photosensitizers, antifoaming agents, thickeners, thixotropic agents, surfactants, leveling agents, flame retardants, plasticizers, stabilizers, agents, polymerization inhibitors, ultraviolet absorbers, antioxidants, antistatic agents, fluidity modifiers and adhesion promoters.
- the semiconductor film-forming material of the present invention can be cured by heating with a hot plate such as a hot plate, an atmospheric oven, an inert gas oven, a vacuum oven, a hot air circulating oven, or the like.
- a hot plate such as a hot plate, an atmospheric oven, an inert gas oven, a vacuum oven, a hot air circulating oven, or the like.
- the heating temperature for thermosetting may be appropriately selected depending on the type of reactive group.
- the reactive functional group is a carbon-carbon triple bond
- it is preferably 200 to 400°C, more preferably 250 to 350°C. more preferred.
- the curing time is not particularly limited, but from the viewpoint of improving productivity, it is preferably 1 to 60 minutes, more preferably 1 to 30 minutes.
- the film-forming material for semiconductors of the present invention can provide films with excellent heat resistance and solvent resistance. Therefore, it is useful because it can form a semiconductor film that requires high heat resistance and solvent resistance, and is particularly useful as a material for forming an underlayer film.
- ⁇ Production Example 12> 2.10 g of compound (A5), 0.32 g of benzaldehyde, and 24 g of PGMEA were placed in a reaction flask equipped with a reflux tube, and 0.20 g of methanesulfonic acid was added while stirring. Under a nitrogen stream, the temperature was raised and the mixture was stirred at 100° C. for 20 hours. After cooling to room temperature and removing insoluble matter, the reaction solution was added dropwise to 100 g of a mixed solvent of n-hexane/2-propanol 2/1 and stirred for 30 minutes. The precipitate was filtered off and dried under reduced pressure at 60° C. to obtain 1.7 g of a dark brown powdery polymer (A12). The molecular weight (converted to polystyrene) measured by GPC was a weight average molecular weight of 2,640 and a dispersity of 1.17.
- Examples 1 to 23 and Comparative Examples 1 to 6 Each component was weighed according to the formulation (parts by mass) shown in Tables 1 to 3, mixed, and dissolved by stirring. After confirming that the solid was completely dissolved, the solution was filtered through a fluororesin filter (pore size: 0.2 ⁇ m) to obtain a composition for evaluation.
- A1 Compound (A1) Compound (I) A2: Compound (A2) Compound (I) A3: Compound (A3) Compound (I) A4: Compound (A4) Compound (I) A5: Compound (A5) Compound (I) A6: Compound (A6) Compound (I) A7: Compound (A7) Compound (I) A8: Compound (A8) Compound (I) A9: Compound (A9) Compound (I) A10: Polymer (A10) Polymer (I) and Polymer (II) A11: Polymer (A11) Polymer (I) and Polymer (II) A12: Polymer (A12) Polymer (I) and Polymer (II) A13: Polymer (A13) Polymer (I) and Polymer (II) A14: compound (A14) compound other than compound (I) A15: compound (A15) compound other than compound (I) A16: compound (A16) compound other than compound (I) A
- the prepared composition for evaluation was applied to a silicon wafer substrate using a spin coater so that the film thickness after heating was 200 nm. After the coated substrate was heated on a hot plate set at 170° C. for 60 seconds, it was further heated on a hot plate set at 300° C. for 60 seconds to obtain a substrate for evaluation. Using this evaluation substrate, various evaluations were performed as follows. The evaluation results are summarized in Tables 1 to 3.
- the film thickness was measured at five points on the substrate for evaluation, and the average value was taken as the pre-test film thickness.
- the substrate for evaluation was heated at 300° C. for 60 seconds, and the film thickness after heating was measured in the same manner as the post-test film thickness.
- A indicates that the rate of film thickness change before and after the test is less than 5%
- B indicates that it is 5% or more and less than 10%
- C indicates that it is 10% or more.
- the smaller the film thickness change before and after the test the more preferably it can be used as a semiconductor film-forming material.
- the composition was applied on a SiO2 stepped substrate (500 nm wide, 100 nm high walls, 500 nm wide trenches) with a spin coater. A film was produced by heating at 170° C. for 60 seconds and at 300° C. for 60 seconds. The spin coating conditions were adjusted so that the film thickness from the trench was 200 nm.
- Embedability Evaluation A section of the substrate was prepared and observed with an SEM (S-4800, manufactured by Hitachi High-Tech Co., Ltd.).
- Flatness evaluation Flatness was evaluated from the difference (film thickness difference) between the thickest part of the film formed on the walls of the substrate and the thinnest part of the film formed on the trench.
- the film thickness difference was less than 10 nm, A was defined; 10 nm or more and less than 30 nm was defined as B;
- the smaller the film thickness difference, the higher the flatness, and the material can be preferably used as a semiconductor film-forming material, and particularly preferably used as an underlayer film-forming material.
- the molecular weight (converted to polystyrene) of the obtained powder measured by gel permeation chromatography (GPC) was a weight average molecular weight (Mw) of 2,490 and a dispersity of 1.17.
- Example 24 to 27 Each component was weighed according to the composition (parts by mass) shown in Table 4, mixed, and dissolved by stirring. After confirming that the solid was completely dissolved, the solution was filtered through a fluororesin filter (pore size: 0.2 ⁇ m) to obtain a composition for evaluation.
- the film-forming materials for semiconductors of the present invention using compound (I) or polymer (I) are materials of comparative examples that do not use compound (I) or polymer (I).
- a film having excellent heat resistance and solvent resistance was obtained.
- the film-forming material for a semiconductor of the present invention gave a film having excellent dry etching properties, and had good embeddability and flatness during film formation.
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Abstract
Description
多層レジスト材料の一般的な例としては、フォトレジスト層の下側に二層有する三層レジスト法がある。具体的には下記の通りである。
まず、シリコンウエハ等の被加工基板に下層膜形成材料を塗工し、加熱により下層膜を形成する。下層膜の上に中間膜を形成した後、フォトレジストを塗布し、露光、現像によりパターンを形成する。形成されたパターンをマスクとして適切なドライエッチング条件で中間膜、下層膜の順にエッチング処理する。得られた下層膜パターンをマスクとして適切なドライエッチング条件で被加工基板をエッチングし、残存したマスクをアッシング処理することで目的構造の基板を得る。
下層膜材料としては芳香族炭化水素環を有するビニル誘導体(特許文献2)や、炭素-炭素間三重結合構造を有する芳香族化合物(特許文献3)などが知られている。
式中、Aは、炭素原子数6の炭化水素環を表し、
X1及びX2は、それぞれ独立に、反応性基若しくは反応性基を有する基が置換していてもよい炭素原子数6~30のアリール基、反応性基若しくは反応性基を有する基が置換していてもよい炭素原子数2~30の複素環基、又は反応性基若しくは反応性基を有する基が置換していてもよい炭素原子数3~30の複素環含有基を表し、
R1、R2、R3、R4、R6、R7、R8及びR9は、それぞれ独立に、水素原子、ハロゲン原子、反応性基、ニトロ基、反応性基が置換していてもよい炭素原子数1~20の炭化水素基、反応性基が置換していてもよい炭素原子数2~10の複素環基、若しくは反応性基が置換していてもよい炭素原子数3~30の複素環含有基、又は前記炭素原子数1~20の炭化水素基中のメチレン基の1つ以上が下記<群A>より選ばれる2価の基により置換された基、若しくは前記炭素原子数3~30の複素環含有基中のメチレン基の1つ以上が下記<群A>より選ばれる2価の基により置換された基を表し、
R5及びR10は、それぞれ独立に、水素原子、反応性基が置換していてもよい炭素原子数1~20の炭化水素基、反応性基が置換していてもよい炭素原子数2~10の複素環基、若しくは反応性基が置換していてもよい炭素原子数3~30の複素環含有基、又は前記炭素原子数1~20の炭化水素基中のメチレン基の1つ以上が下記<群A>より選ばれる2価の基により置換された基、若しくは前記炭素原子数3~30の複素環含有基中のメチレン基の1つ以上が下記<群A>より選ばれる2価の基により置換された基を表す。
<群A>:-O-、-CO-、-COO-、-OCO-、-NR11-、-NR12CO-、-S-
R11及びR12は、それぞれ独立に、水素原子、又は炭素原子数1~20の炭化水素基を表す。
フォトレジスト、中間膜、下層膜とは、良好なパターンを得ることを目的に使用される半導体工程用部材であり、シリコンウエハなどの被加工基板の上に下層膜、中間体膜、フォトレジストの順に積層した多層レジストとして用いることができる。
2つの芳香族炭化水素環を連結する連結基としては、単結合、スルフィド基(-S-)及びカルボニル基等が挙げられる。
2つの単環構造の芳香族炭化水素環が連結したアリール基としては、例えば、ビフェニル、ジフェニルスルフィド、ベンゾイルフェニル等が挙げられる。
反応性基を分子内に3つ以上有する場合としては、X1及びX2がそれぞれ反応性基を2つ有する場合、X1及びX2がそれぞれ反応性基を2つ有し、さらにR5及びR10が反応性基を有する場合、X1及びX2がそれぞれ反応性基を1つ有し、さらにR5及びR10が反応性基を有する場合等が挙げられる。
本発明においては、前記一般式(II)中のX1及びX2が反応性基を有する基であることが好ましい。また、前記一般式(II)中のX1、X2、R5及びR10が反応性基を有する基であることも好ましい。
R21及びR22は、それぞれ独立に、ハロゲン原子、反応性基、ニトロ基、シアノ基、反応性基が置換していてもよい炭素原子数1~20の炭化水素基、反応性基が置換していてもよい炭素原子数2~10の複素環基、若しくは反応性基が置換していてもよい炭素原子数3~30の複素環含有基、又は前記炭素原子数1~20の炭化水素基中のメチレン基の1つ以上が下記<群B>より選ばれる2価の基により置換された基、若しくは前記炭素原子数3~30の複素環含有基中のメチレン基の1つ以上が下記<群B>より選ばれる2価の基により置換された基を表し、
R23及びR24は、それぞれ独立に、水素原子、ハロゲン原子、水酸基、ニトロ基、シアノ基、置換基を有していてもよい炭素原子数1~20の炭化水素基、置換基を有していてもよい炭素原子数2~10の複素環基、若しくは置換基を有していてもよい炭素原子数3~30の複素環含有基、又は前記炭素原子数1~20の炭化水素基中のメチレン基の1つ以上が下記<群B>より選ばれる2価の基により置換された基、若しくは前記炭素原子数3~30の複素環含有基中のメチレン基の1つ以上が下記<群B>より選ばれる2価の基により置換された基を表し、
R23とR24は、直接、又はメチレン基、-O-若しくは-S-を介して互いに結合して環を形成していてもよく、
aは、0~3の整数を表し、
bは、0~3の整数を表す。
<群B>:-O-、-CO-、-COO-、-OCO-、-NR25-、-NR26CO-、-S-
R25及びR26は、それぞれ独立に、水素原子、又は炭素原子数1~20の炭化水素基を表す。
前記一般式(II)中のR21、R22、R23及びR24で表される炭素原子数2~10の複素環基及び炭素原子数3~30の複素環含有基としては、前記一般式(I)中のR1等で表される炭素原子数2~10の複素環基及び炭素原子数3~30の複素環含有基として例示した基が挙げられる。
本発明において、重量平均分子量とは、ゲル浸透クロマトグラフィー(GPC)により測定したポリスチレン換算の分子量である。
前記他の化合物の含有量は、固形分中に20質量%以下であることが好ましい。
前記他の重合体の含有量は、固形分中に20質量%以下であることが好ましい。
α-アミノケトン化合物としては、例えば、1-フェニル-2-(4-モルホリノベンゾイル)-2-ジメチルアミノブタン、2-(4-メチルチオベンゾイル)-2-モルホリノプロパン等が挙げられる。
光塩基発生剤となるアミノシクロプロペノン化合物としては、例えば、2-ジエチルアミノ-3-フェニルシクロプロペノン、2-ジエチルアミノ-3-(1-ナフチル)シクロプロペノン、2-ピロリジニル-3-フェニルシクロプロペノン、2-イミダゾリル-3-フェニルシクロプロペノン、2-イソプロピルアミノ-3-フェニルシクロプロペノン等が挙げられる。
その他の成分としては、無機フィラー、有機フィラー、シランカップリング剤、着色剤、光増感剤、消泡剤、増粘剤、チクソ剤、界面活性剤、レベリング剤、難燃剤、可塑剤、安定剤、重合禁止剤、紫外線吸収剤、酸化防止剤、静電防止剤、流動調整剤及び接着促進剤等の各種添加物等が挙げられる。
還流管付き反応フラスコに、インドールを29.3g(250mmol)、3-ヒドロキシベンズアルデヒドを30.5g(250mmol)、アセトニトリルを166g入れ、攪拌しながら、完全に溶解させた。水冷し、48%臭化水素酸4.2g(25mmol)をゆっくりと滴下した。発熱が収まっていることを確認した後、室温に戻し、そのまま2時間攪拌した。反応液を10℃まで冷却し、析出物をろ過し、アセトニトリル70gで洗浄し、ろ物を40℃で減圧乾燥させることで、化合物(M1)を淡黄色粉体で得た。
収量28.5g(収率54%)
1H-NMR(DMSO-d6) δ/ppm:5.57(s,2H),6.59-7.25(m,16H),9.16(s,2H),10.66(s,2H).
収量20.7g(収率78%)
1H-NMR(DMSO-d6) δ/ppm:6.83-7.49(m,16H),9.68(s,2H),10.49(s,2H).
還流管付き反応フラスコに、インドールを40.0g(341mmol)、2,5-ジヒドロキシベンズアルデヒドを47.2g(341mmol)、アセトニトリルを243g入れ、攪拌しながら、完全に溶解させた。水冷し、48%臭化水素酸5.7g(34mmol)をゆっくりと滴下した。発熱が収まっていることを確認した後、室温に戻し、そのまま2時間攪拌した。反応液を10℃まで冷却し、析出物をろ過し、アセトニトリル100gで洗浄し、ろ物を40℃で減圧乾燥させることで、化合物(M2)を灰色粉体で得た。
収量33.2g(収率41%)
1H-NMR(DMSO-d6) δ/ppm:6.00(s,2H),6.04-7.33(m,14H),8.27(s,2H),9.25(s,2H),10.42(s,2H).
収量29.7g(収率99%)
1H-NMR(DMSO-d6) δ/ppm:6.80-7.43(m,14H),8.60(s,2H),8.89(s,2H),10.27(s,2H).
還流管付き反応フラスコに、化合物(A1)を6.61g(15mmol)、ジメチルスルホキシド(DMSO)を60g入れ、攪拌しながら、窒素気流下、室温で48%水酸化ナトリウム水溶液5.29g(66mmol)を滴下した。続いて、3-ブロモ-1-プロピン7.55g(63mmol)を滴下し、そのまま室温で2時間攪拌を行なった。反応液を350gの水に投入し、30分攪拌後、析出物をろ過した。採取したろ物を酢酸エチル50gに溶解させた後、水50gを加え、30分攪拌し、油水分離した。有機層を脱溶媒した残渣を40℃で減圧乾燥させることで化合物(A3)を淡褐色粉体で得た。
収量3.8g(収率42%)
1H-NMR(DMSO-d6) δ/ppm:3.10(t,2H),3.56(t,2H),4.65(d,4H),4.92(d,4H)6.61-7.69(m,16H).
還流管付き反応フラスコに、化合物(A2)を5.20g(11mmol)、テトラヒドロフラン(THF)を50g入れ、攪拌しながら、窒素気流下、室温で48%水酸化ナトリウム水溶液3.67g(44mmol)を滴下した。続いて、3-ブロモ-1-プロピン5.00g(42mmol)を滴下し、そのまま室温で1時間攪拌を行なった。反応液を300gの水に投入し、30分攪拌後、析出物をろ過した。採取したろ物にイソプロパノール50gを加え、30分攪拌後、ろ過し、残渣を40℃で減圧乾燥させることで化合物(A4)を淡褐色粉体で得た。
収量1.3g(収率20%)
1H-NMR(DMSO-d6) δ/ppm:3.39(t,2H),3.53(t,2H),4.61(d,4H),6.82(t,2H),7.09-7.43(m,12H),10.41(s,2H).
還流管付き反応フラスコに、化合物(A2)を5.20g(11mmol)、ジメチルスルホキシド(DMSO)を50g入れ、攪拌しながら、窒素気流下、室温で48%水酸化ナトリウム水溶液5.50g(66mmol)を滴下した。続いて、3-ブロモ-1-プロピン7.50g(63mmol)を滴下し、そのまま室温で2時間攪拌を行なった。反応液を300gの水に投入し、30分攪拌後、析出物をろ過した。採取したろ物を酢酸エチル50gに溶解させた後、水50gを加え、30分攪拌し、油水分離した。有機層を脱溶媒した残渣を40℃で減圧乾燥させることで化合物(A5)を淡褐色粉体で得た。
収量4.90g(収率65%)
1H-NMR(DMSO-d6) δ/ppm:3.09(t,2H),3.44(t,2H),3.52(t,2H),4.65-4.85(m,12H),6.72-7.49(m,14H).
還流管付き反応フラスコに、インドール30.0g(256mmol)、4-(トリメチルシリル)エチニルベンズアルデヒド52.0g(256mmol)、アセトニトリル230gを入れ、水冷下、攪拌しながら、48%臭化水素酸9.0g(52.0mmol)をゆっくりと滴下した。反応液を室温に戻し、そのまま2時間攪拌した。反応液を10℃まで冷却し、析出物をろ過し、アセトニトリル100gで洗浄し、ろ物を40℃で減圧乾燥させることで、化合物(M3)を淡黄色粉体で得た。
収量25.0g(収率33%)
収量10.9g(収率50%)
収量6.1g(収率88%)
1H-NMR(DMSO-d6) δ/ppm:4.37(s,2H),6.88-7.83(m,16H),10.64(s,2H).
還流管付き反応フラスコに、インドール11.7g(100mmol)、3-ホルミルベンゾニトリル13.1g(100mmol)、アセトニトリル50gを入れ、攪拌しながら、完全に溶解させた。水冷し、48%臭化水素酸1.7g(10mmol)をゆっくりと滴下した。反応液を室温に戻し、そのまま2時間攪拌した。反応液を10℃まで冷却し、析出物をろ過し、アセトニトリル20gで洗浄し、ろ物を40℃で減圧乾燥させることで、化合物(M5)を灰色粉体で得た。
収量3.8g(収率16.5%)
1H-NMR(DMSO-d6) δ/ppm:5.89(s,2H),6.83-8.08(m,16H),10.91(s,2H).
収量1.5g(収率61%)
1H-NMR(DMSO-d6) δ/ppm:2.89(t,2H),4.81(d,2H),5.03(d,2H),6.19(s,2H),7.00-7.94(m,16H).
還流管付き反応フラスコに、インドール11.7g(100mmol)、2-フルオレンカルボキシアルデヒド19.4g(100mmol)、アセトニトリル90gを入れ、攪拌しながら、完全に溶解させた。水冷し、48%臭化水素酸1.7g(10mmol)をゆっくりと滴下した。反応液を室温に戻し、そのまま2時間攪拌した。反応液を10℃まで冷却し、析出物をろ過し、アセトニトリル20gで洗浄し、ろ物を40℃で減圧乾燥させることで、化合物(M6)を褐色粉体で得た。
収量27.0g(収率92.1%)
1H-NMR(DMSO-d6) δ/ppm:3.84(s,4H),5.85(s,2H),6.77-7.87(m,22H),10.76(s,2H).
収量1.6g(収率49%)
1H-NMR(DMSO-d6) δ/ppm:2.47(d,8H),2.94(t,4H),3.05(t,2H),4.72(d,2H),4.92(d,2H),6.10(s,2H),6.90-8.34(m,22H).
還流管付きフラスコに、化合物(M1)を3.10g(7.0mmol)、ジメチルスルホキシド(DMSO)を20g入れ、攪拌しながら、窒素気流下、室温で48%水酸化ナトリウム水溶液2.92g(35.0mmol)を滴下した。続いて、3-ブロモ-1-プロペン4.23g(35.0mmol)を滴下し、そのまま室温で3時間攪拌を行なった。反応液を100gの水に投入し、30分攪拌後、析出物をろ過した。採取したろ物にメタノール30gを加え、30分間攪拌させた。懸濁液をろ過し、ろ物を40℃で減圧乾燥させることで化合物(A9)を淡黄色粉体で得た。
収量3.0g(収率71%)
1H-NMR(DMSO-d6) δ/ppm:4.52(m,4H),4.89(m,4H),5.17-5.34(m,10H),5.89(s,2H),5.96(m,2H),6.72-7.46(m,16H).
還流管付き反応フラスコに、化合物(M2)を2.20g、ベンズアルデヒドを0.54g、PGMEAを24g入れ、攪拌しているところに、メタンスルホン酸0.14gを添加した。窒素気流下、昇温し、140℃で20時間攪拌を行なった。室温まで冷却し、不溶物を除去後、n-ヘキサン/2-プロパノール=2/1混合溶媒120g中に反応液を滴下し、30分間攪拌した。析出物をろ別し、60℃で減圧乾燥させることで、褐色粉体の重合体(A10)を2.2g得た。GPCにより測定した分子量(ポリスチレン換算)は、重量平均分子量1,450、分散度1.25であった。
還流管付き反応フラスコに、化合物(M2)を2.20g、フルオレノンを0.90g、N-メチルピロリドンを24g入れ、攪拌しているところに、メタンスルホン酸0.32gを添加した。窒素気流下、昇温し、140℃で20時間攪拌を行なった。室温まで冷却し、不溶物を除去後、n-ヘキサン/2-プロパノール=2/1混合溶媒120g中に反応液を滴下し、30分間攪拌した。析出物をろ別し、60℃で減圧乾燥させることで、黒色粉体の重合体(A11)を2.3g得た。GPCにより測定した分子量(ポリスチレン換算)は、重量平均分子量1,990、分散度1.07であった。
還流管付き反応フラスコに、化合物(A5)を2.10g、ベンズアルデヒドを0.32g、PGMEAを24g入れ、攪拌しているところに、メタンスルホン酸0.20gを添加した。窒素気流下、昇温し、100℃で20時間攪拌を行なった。室温まで冷却し、不溶物を除去後、n-ヘキサン/2-プロパノール=2/1混合溶媒100g中に反応液を滴下し、30分間攪拌した。析出物をろ別し、60℃で減圧乾燥させることで、黒褐色粉体の重合体(A12)を1.7g得た。GPCにより測定した分子量(ポリスチレン換算)は、重量平均分子量2,640、分散度1.17であった。
還流管付き反応フラスコに、化合物(M6)を2.85g、ベンズアルデヒドを0.37g、プロピレングリコールモノメチルエーテルアセテート(PGMEA)を30g入れ、攪拌しているところに、メタンスルホン酸0.22gを添加した。窒素気流下、昇温し、100℃で20時間攪拌を行なった。室温まで冷却し、不溶物を除去後、n-ヘキサン/2-プロパノール=2/1混合溶媒150g中に反応液を滴下し、30分間攪拌した。析出物をろ別し、60℃で減圧乾燥させることで、褐色粉体の重合体(A13)を1.5g得た。GPCにより測定した分子量(ポリスチレン換算)は、重量平均分子量2,350、分散度1.17であった。
表1~3に示す配合(質量部)に従い各成分を秤量して混合し、撹拌して溶解させた。固体が完全に溶解していることを確認し、フッ素樹脂製フィルター(孔径0.2μm)でろ過し、評価用組成物とした。
A1:化合物(A1) 化合物(I)
A2:化合物(A2) 化合物(I)
A3:化合物(A3) 化合物(I)
A4:化合物(A4) 化合物(I)
A5:化合物(A5) 化合物(I)
A6:化合物(A6) 化合物(I)
A7:化合物(A7) 化合物(I)
A8:化合物(A8) 化合物(I)
A9:化合物(A9) 化合物(I)
A10:重合体(A10) 重合体(I)かつ重合体(II)
A11:重合体(A11) 重合体(I)かつ重合体(II)
A12:重合体(A12) 重合体(I)かつ重合体(II)
A13:重合体(A13) 重合体(I)かつ重合体(II)
A14:化合物(A14) 化合物(I)以外の化合物
A15:化合物(A15) 化合物(I)以外の化合物
A16:化合物(A16) 化合物(I)以外の化合物
A17:化合物(A17) 化合物(I)以外の化合物
A18:重合体(A18) 化合物(I)以外の化合物をモノマーとする重合体
B1:下記化合物(B1) 架橋剤(グリコールウリル化合物)
B2:下記化合物(B2) 架橋剤(フェノール化合物)
C1:ビス(4-tert-ブチルフェニル)ヨードニウム ノナフルオロブタンスルホナート(重合開始剤:熱酸発生剤)
D1:プロピレングリコールモノメチルエーテルアセテート(PGMEA) 溶剤
D2:シクロヘキサノン 溶剤
調製した評価用組成物を、スピンコーターを使用して、加熱後の膜厚が200nmになるようシリコンウエハ基板に塗布した。塗布後の基板を、170℃に設定したホットプレートで60秒間加熱後、300℃に設定したホットプレートで更に60秒加熱して評価用基板とした。
この評価用基板を用いて、各種評価を以下のようにして行った。評価結果を表1~3にまとめて示す。
セミラボ社製SE-2000分光エリプソメーターを使用して評価用基板上の5点の膜厚を測定し、その平均値を試験前膜厚とした。
評価用基板を300℃で60秒加熱し、加熱後の膜厚を同様に測定し、試験後膜厚とした。
試験前後の膜厚変化の割合が5%未満をA、5%以上10%未満をB、10%以上をCとした。
試験前後の膜厚変化が小さいほど、半導体膜形成材料として好ましく使用することができる。
セミラボ社製SE-2000分光エリプソメーターを使用して評価用基板上の5点の膜厚を測定し、その平均値を試験前膜厚とした。
評価用基板をPGMEAに25℃で60秒間浸漬させた後、170℃で60秒加熱し、PGMEAを蒸発させた後の膜厚を同様に測定し、試験後膜厚とした。
試験前後の膜厚変化の割合が1%未満をA、1%以上3%未満をB、3%以上をCとした。
試験前後の膜厚変化が小さいほど、半導体膜形成材料として好ましく使用することができる。
セミラボ社製SE-2000分光エリプソメーターを使用して評価用基板上の5点の膜厚を測定し、その平均値を試験前膜厚とした。
エッチング装置(アルバック社製CE-300I)を使用し、エッチング後の膜厚を同様に測定した。エッチング条件は下記条件で行ない、15秒、30秒、60秒、120秒エッチングした後の膜厚を測定し、1秒間にエッチングされる膜厚(エッチングレート)を算出した。エッチング条件を下記に示す。
Arガス流量 44ml/分
CF4ガス流量 11ml/分
チャンバー圧力 4.0Pa
RFパワー 100W
比較例2(化合物(A15))のエッチングレートを100とした時に、90未満をA、90以上100未満をB、100以上をCとした。
エッチングレートが小さいほど、エッチング耐性が高く、半導体膜形成材料として好ましく使用でき、下層膜形成材料として特に好ましく使用できる。
スピンコーターで、SiO2段差付き基板(幅500nm、高さ100nmの壁、幅500nmのトレンチ)上に組成物を塗布した。170℃で60秒、300℃で60秒加熱し、膜を作製した。膜厚はトレンチからの膜厚が200nmとなるよう、スピンコート条件を調整した。
埋め込み性評価:基板の切片を作製し、SEM(日立ハイテク社製S-4800)観察で段差に空隙無く埋め込みされているものをA、空隙があるものをBとした。
平坦性評価:基板上の壁の上に作製された膜の最も厚い箇所と、トレンチの上に作製された膜の最も薄い箇所との差(膜厚差)から平坦性を評価した。膜厚差が10nm未満をA、10nm以上30nm未満をB、30nm以上をCとした。
膜厚差が小さいほど、平坦性が高く、半導体膜形成材料として好ましく使用でき、下層膜形成材料として特に好ましく使用できる。
還流管付きフラスコに、化合物(M6)を15.0g(26mmol)、o-キシレンを450g入れ、攪拌しながら、ヨウ素7.8g(31mmol)を添加し、140℃で5時間反応を行なった。
反応液を室温まで冷却し、10%チオ硫酸ナトリウム水溶液120gを滴下して30分間攪拌した。析出物をろ過した後、ろ物をo-キシレン50gで洗浄し、更に水/メタノール=1/2(重量比)混合溶媒100gで2回洗浄した。ろ物を40℃で減圧乾燥させることで、化合物(M7)を灰色粉体で得た。
収量13.3g(収率89%)
1H-NMR(THF-d8) δ/ppm:4.12(s,4H),6.77-8.19(m,22H),9.72(s,2H).
収量2.2g(収率44%)
1H-NMR(THF-d8) δ/ppm:2.51(d,8H),2.63(t,4H),3.05(t,2H),4.67(d,4H),6.76-8.19(m,22H).
還流管付きフラスコに、5-ヒドロキシインドールを4.0g(30mmol)、2-フルオレンカルボキシアルデヒドを5.8g(30mmol)、アセトニトリルを30g入れた。攪拌しながら、室温で48%臭化水素酸を0.51g(3mmol)を滴下し2時間攪拌を行なった。反応液に水を10g加え、室温で30分撹拌したのちにろ過した。採取したろ物をメタノール10gで3回洗浄し、40℃で減圧乾燥させることで化合物(M8)を緑灰色粉体で得た。
収量5.2g(収率56%)
1H-NMR(DMSO-d6) δ/ppm:4.12(s,4H),5.66(s,2H),6.13-8.29(m,20H),10.09(s,2H)、10.33(s,2H).
収量4.5g(収率100%)
1H-NMR(DMSO-d6) δ/ppm:4.12(s,4H)、6.43-8.24(m,20H)、10.09(s,2H)、10.33(s,2H)
収量3.7g(収率61%)
1H-NMR(DMSO-d6) δ/ppm:2.55(d,8H),2.73(t,4H),3.05(t,2H),3.38(t,2H),4.65(d,4H),4.74(d,4H),6.74-8.26(m,20H.)
還流管付きフラスコに、5-メトキシインドールを75.0g(510mmol)、3-メトキシベンズアルデヒドを69.3g(510mmol)、アセトニトリルを270g入れた。攪拌しながら、室温で48%臭化水素酸を8.59g(51mmol)を滴下し2時間攪拌を行なった。反応液を冷却し30分撹拌したのちにろ過した。採取したろ物をアセトニトリル20gで3回洗浄し、40℃で減圧乾燥させることで化合物(M10)を灰色粉体で得た。
収量33.1g(収率25%)
収量32.1g(収率72%)
収量4.3g(収率20%)
収量2.0g(収率69%)
1H-NMR(DMSO-d6) δ/ppm:3.07(t,2H),3.43(t,2H),3.53(t,2H),4.50(d,4H),4.62(d,4H),4.90(d,4H),6.16(d,2H),7.09-7.69(m,12H).
還流管付き反応フラスコに、化合物(A19)を2.28g、ベンズアルデヒドを0.30g、N-メチルピロリドンを30g入れ、窒素気流下50℃まで昇温した。メタンスルホン酸0.18gをゆっくりと滴下し、更に昇温し、80℃で8時間攪拌を行なった。室温まで冷却し、不溶物を除去後、n-ヘキサン/2-プロパノール=2/1混合溶媒150g中に反応液を滴下し、30分間攪拌した。析出物をろ別し、60℃で減圧乾燥させることで、褐色粉体の重合体(A22)を1.3g得た。得られた粉体をゲル浸透クロマトグラフィー(GPC)により測定した分子量(ポリスチレン換算)は、重量平均分子量(Mw)2,490、分散度1.17であった。
表4に示す配合(質量部)に従い各成分を秤量して混合し、撹拌して溶解させた。固体が完全に溶解していることを確認し、フッ素樹脂製フィルター(孔径0.2μm)でろ過し、評価用組成物とした。
A19:化合物(A19) 化合物(I)
A20:化合物(A20) 化合物(I)
A21:化合物(A21) 化合物(I)
A22:重合体(A22) 重合体(I)かつ重合体(II)
D1:プロピレングリコールモノメチルエーテルアセテート(PGMEA) 溶剤
D2:シクロヘキサノン 溶剤
Claims (13)
- 下記一般式(I)で表され、分子内に反応性基を1つ以上有する化合物又は下記一般式(I)で表され、分子内に反応性基を1つ以上有する化合物をモノマーとする重合体と、溶剤とを含有する半導体用膜形成材料。
式中、Aは、炭素原子数6の炭化水素環を表し、
X1及びX2は、それぞれ独立に、反応性基若しくは反応性基を有する基が置換していてもよい炭素原子数6~30のアリール基、反応性基若しくは反応性基を有する基が置換していてもよい炭素原子数2~30の複素環基、又は反応性基若しくは反応性基を有する基が置換していてもよい炭素原子数3~30の複素環含有基を表し、
R1、R2、R3、R4、R6、R7、R8及びR9は、それぞれ独立に、水素原子、ハロゲン原子、反応性基、ニトロ基、反応性基が置換していてもよい炭素原子数1~20の炭化水素基、反応性基が置換していてもよい炭素原子数2~10の複素環基、若しくは反応性基が置換していてもよい炭素原子数3~30の複素環含有基、又は前記炭素原子数1~20の炭化水素基中のメチレン基の1つ以上が下記<群A>より選ばれる2価の基により置換された基、若しくは前記炭素原子数3~30の複素環含有基中のメチレン基の1つ以上が下記<群A>より選ばれる2価の基により置換された基を表し、
R5及びR10は、それぞれ独立に、水素原子、反応性基が置換していてもよい炭素原子数1~20の炭化水素基、反応性基が置換していてもよい炭素原子数2~10の複素環基、若しくは反応性基が置換していてもよい炭素原子数3~30の複素環含有基、又は前記炭素原子数1~20の炭化水素基中のメチレン基の1つ以上が下記<群A>より選ばれる2価の基により置換された基、若しくは前記炭素原子数3~30の複素環含有基中のメチレン基の1つ以上が下記<群A>より選ばれる2価の基により置換された基を表す。
<群A>:-O-、-CO-、-COO-、-OCO-、-NR11-、-NR12CO-、-S-
R11及びR12は、それぞれ独立に、水素原子、又は炭素原子数1~20の炭化水素基を表す。 - 一般式(I)中のX1及びX2が、反応性基若しくは反応性基を有する基が置換していてもよいフェニル基、反応性基若しくは反応性基を有する基が置換していてもよい炭素原子数7~30の炭化水素型芳香族縮合環基又は反応性基若しくは反応性基を有する基が置換していてもよい炭素原子数3~30複素環含有縮合環基である請求項1に記載の半導体用膜形成材料。
- 一般式(I)中のR5及びR10が、反応性基が置換した炭素原子数1~20の炭化水素基である請求項1に記載の半導体用膜形成材料。
- 反応性基が、炭素-炭素三重結合又はフェノール性水酸基である請求項1に記載の半導体用膜形成材料。
- 一般式(I)で表される化合物が、分子内に反応性基を2つ以上有する請求項1に記載の半導体用膜形成材料。
- 架橋剤を含有する請求項1に記載の半導体用膜形成材料。
- 重合開始剤を含有する請求項1に記載の半導体用膜形成材料。
- 請求項1~8のいずれか一項に記載の半導体用膜形成材料を含有する半導体用部材形成材料。
- 請求項1~8のいずれか一項に記載の半導体用膜形成材料を含有する半導体用工程部材形成材料。
- 請求項1~8のいずれか一項に記載の半導体用膜形成材料を含有する下層膜形成材料。
- 請求項11に記載の下層膜形成材料を用いて形成された下層膜。
- 請求項1~8のいずれか一項に記載の半導体用膜形成材料を使用して製造された半導体デバイス。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22845862.6A EP4375750A4 (en) | 2021-07-20 | 2022-07-15 | FILM FORMING MATERIAL FOR A SEMICONDUCTOR, ELEMENT FORMING MATERIAL FOR A SEMICONDUCTOR, PROCESSING ELEMENT FORMING MATERIAL FOR A SEMICONDUCTOR, UNDERLAYER FILM FORMING MATERIAL, UNDERLAYER FILM, AND SEMICONDUCTOR DEVICE |
| JP2023536725A JPWO2023002928A1 (ja) | 2021-07-20 | 2022-07-15 | |
| CN202280048352.7A CN117616337A (zh) | 2021-07-20 | 2022-07-15 | 半导体用膜形成材料、半导体用构件形成材料、半导体用工序构件形成材料、下层膜形成材料、下层膜及半导体器件 |
| US18/577,499 US20240352203A1 (en) | 2021-07-20 | 2022-07-15 | Film-forming material for semiconductor, member-forming material for semiconductor, process member-forming material for semiconductor, underlayer film-forming material, underlayer film, and semiconductor device |
| KR1020247000069A KR20240035990A (ko) | 2021-07-20 | 2022-07-15 | 반도체용 막 형성 재료, 반도체용 부재 형성 재료, 반도체용 공정 부재 형성 재료, 하층막 형성 재료, 하층막 및 반도체 디바이스 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-119825 | 2021-07-20 | ||
| JP2021119825 | 2021-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023002928A1 true WO2023002928A1 (ja) | 2023-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2022/027788 Ceased WO2023002928A1 (ja) | 2021-07-20 | 2022-07-15 | 半導体用膜形成材料、半導体用部材形成材料、半導体用工程部材形成材料、下層膜形成材料、下層膜及び半導体デバイス |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20240352203A1 (ja) |
| EP (1) | EP4375750A4 (ja) |
| JP (1) | JPWO2023002928A1 (ja) |
| KR (1) | KR20240035990A (ja) |
| CN (1) | CN117616337A (ja) |
| TW (1) | TW202311263A (ja) |
| WO (1) | WO2023002928A1 (ja) |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP4375750A4 (en) | 2025-10-08 |
| JPWO2023002928A1 (ja) | 2023-01-26 |
| KR20240035990A (ko) | 2024-03-19 |
| CN117616337A (zh) | 2024-02-27 |
| TW202311263A (zh) | 2023-03-16 |
| EP4375750A1 (en) | 2024-05-29 |
| US20240352203A1 (en) | 2024-10-24 |
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