WO2012117786A1

WO2012117786A1 - Photosensitive composition, photosensitive solder-resist composition, photosensitive solder-resist film, permanent pattern, method for forming same, and printed circuit board

Info

Publication number: WO2012117786A1
Application number: PCT/JP2012/051878
Authority: WO
Inventors: 有岡　大輔; 冨澤　秀樹
Original assignee: 富士フイルム株式会社
Priority date: 2011-02-28
Filing date: 2012-01-27
Publication date: 2012-09-07
Also published as: JP2012194534A; TW201235781A

Abstract

A photosensitive composition containing a polymerizable compound, a photopolymerization initiator, a thermal cross-linker, and a compound that has a triazole ring and also has: a group that can react with a radical; and/or a group that can react with a thermal cross-linker. Said composition preferably also contains a carboxyl-group-containing macromolecular compound, which is preferably a polyurethane resin containing an acid-modified ethylene unsaturated group.

Description

Photosensitive composition, photosensitive solder resist composition, photosensitive solder resist film, permanent pattern, method for forming the same, and printed circuit board

The present invention is a photosensitive composition suitably used for a solder resist, a photosensitive solder resist composition using the photosensitive composition, a photosensitive solder resist film using the photosensitive solder resist composition, and The present invention relates to a high-definition permanent pattern (a protective film, an interlayer insulating film, a solder resist, etc.), a formation method thereof, and a printed board.

In recent years, electronic devices have been required to have high performance, high functionality, high quality, and high reliability as well as small size, thinness, and light weight as represented by mobile communication devices. Electronic component modules mounted on devices are also required to be small and high in density. In response to such demands, in recent years, the surface of an insulating substrate made of a glass fiber and an epoxy resin that can be made lighter and densified from a ceramic wiring substrate made of ceramics such as an aluminum oxide sintered body. In addition, a so-called printed circuit board in which a wiring conductor layer is formed by a thin film forming method using copper, gold or the like which is a low resistance metal has been used for an electronic component module. In addition, this printed board is also changing to a build-up wiring board capable of higher density wiring.

For example, such a build-up wiring board is formed by laminating a film made of a thermosetting resin on an insulating board made of glass fiber and epoxy resin, and thermosetting the film to form an insulating layer. An opening is formed, and then the surface of the insulating layer is chemically roughened and a copper film is deposited using an electroless copper plating method and an electrolytic copper plating method, thereby forming a conductor layer in the opening and insulating. The wiring conductor layer is formed on the surface of the layer, and the insulating layer and the wiring conductor layer are repeatedly formed.

Further, a solder resist layer having a thickness of 20 μm to 50 μm is deposited on the surface of the wiring board in order to prevent oxidation and corrosion of the wiring conductor layer and to protect the insulating layer from heat when mounting electronic components on the wiring board. Is formed. This solder resist layer is generally composed of an alkali-soluble photocrosslinkable resin that has good adhesion to the wiring conductor layer and the insulating layer, and a flexible resin, and has a coefficient of thermal expansion that is the same as that of the insulating layer and the wiring conductor layer. In order to match the expansion coefficient, the inorganic filler is contained in an amount of 5 to 75% by mass.

However, this solder resist layer generally contains a hydroxyl group or a carboxyl group in order for the alkali-soluble photocrosslinkable resin to be contained to develop developability when an opening is formed in the solder resist layer by exposure and development. The water absorption rate is high and the moisture in the air is gradually absorbed, and this moisture reduces the insulation resistance of the solder resist layer to 10 ⁸ Ω or less, causing short circuit between the wiring conductor layers. There is a problem that the conductor layer is corroded, and as a result, the electrical reliability of the wiring board is deteriorated.

A technique for containing a nitrogen-containing heterocyclic compound (imidazole compound, triazole compound, etc.) in the solder resist layer is known. When this technique is used, although the heat resistance of the solder resist layer is increased, there is a problem that the plating resistance is lowered.
In addition, if the smoothness of the side surface of the resist pattern is poor, a gap is formed between the solder and the side surface of the resist pattern when soldering, and the gap expands due to heating, causing problems such as peeling of the solder. Then, there exists a problem that the smoothness of the resist pattern side surface is not enough.

Further, as a technique using a triazole compound in a photosensitive composition, it has a carboxyl group-containing polymer binder, an average of at least one ethylenically unsaturated double bond and an average of at least one triazole ring. A photosensitive composition containing a compound, a photopolymerizable monomer, and a photopolymerization initiator has been proposed (see, for example, Patent Document 1).
According to this proposed technique, a composition with good adhesion can be obtained by suppressing development residue, but with this proposed technique, the insulation, plating resistance, and smoothness of the resist pattern side surface required for the solder resist layer are obtained. There is a problem that sex is not obtained.

Therefore, at present, there is a demand for providing a photosensitive composition that is excellent in insulation, plating resistance, and smoothness on the side of the resist pattern.

JP-A-6-43638

This invention makes it a subject to solve the said various problems in the past and to achieve the following objectives. That is, an object of the present invention is to provide a photosensitive composition that is excellent in insulation, plating resistance, and smoothness of the side surface of a resist pattern.

Means for solving the problems are as follows. That is,
The photosensitive composition of the present invention includes a compound having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring, a polymerizable compound, a photopolymerization initiator, and a thermal crosslinking agent. It is characterized by containing.

According to the present invention, it is possible to provide a photosensitive composition that can solve the above-mentioned problems and achieve the above-mentioned object, and that is excellent in insulation, plating resistance, and smoothness of the resist pattern side surface.

(Photosensitive composition)
The photosensitive composition of the present invention comprises at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring, a polymerizable compound, a photopolymerization initiator, and thermal crosslinking. An agent, preferably a carboxyl group-containing polymer compound and, if necessary, other components.

<Compound having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring>
The compound having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring includes at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent, and triazole. If it is a compound which has at least a ring, there will be no restriction | limiting in particular, According to the objective, it can select suitably.

Examples of the group capable of reacting with the radical include an acryloyloxy group, a methacryloyloxy group, a vinylphenyl group, and an allyl group.

Examples of the group capable of reacting with the thermal crosslinking agent include a carboxyl group, an amino group, and a mercapto group.

The triazole ring may be any of 1,2,3-triazole ring and 1,2,4-triazole ring.
1,2,3-triazole and 1,2,4-triazole are compounds represented by the following structural formula.

The compound having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring is, in other words, at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent. Is a compound in which an organic group having a bond to a triazole ring. The bonding position of the organic group to the triazole ring is not particularly limited and may be appropriately selected depending on the purpose, and may be bonded to a nitrogen atom of the triazole ring or bonded to a carbon atom. May be.

As the compound having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring, a compound represented by the following general formula (I) is preferable.

However, in said general formula (I), X represents a triazole ring. Y represents an organic group having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent. n represents an integer of 1 to 3. When n is 2 to 3, Y may be the same or different.

In the general formula (I), Y may be bonded to a nitrogen atom of the triazole ring which is X, or may be bonded to a carbon atom.

In the general formula (I), n is preferably 1 to 2, and more preferably 2. When n is 2, it is advantageous in terms of insulation.

Y in the general formula (I) is preferably a group represented by the following general formula (II).

In the general formula (II), Y ₁ represents an m + 1 valent organic group having 2 to 25 carbon atoms. Z ₁ represents any of a carboxyl group, an acryloyloxy group, and a methacryloyloxy group. m represents an integer of 1 to 2. When m is 2, Z ₁ may be the same or different.

The m + 1 valent organic group having 2 to 25 carbon atoms is not particularly limited and may be appropriately selected depending on the intended purpose. For example, at least one of a urea bond, an amide bond, an ester bond, and a thiourea bond is selected. And an m + 1 valent organic group having 2 to 25 carbon atoms. The carbon number of the organic group is preferably 2 to 20, and more preferably 2 to 15.

The molecular weight of the compound having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring is not particularly limited and may be appropriately selected depending on the intended purpose. 1,000 is preferable, and 100 to 800 is more preferable.

Specific examples of the compound having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring include compounds represented by the following formulas.

-Content of a compound having a triazole ring and at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent-
The content of the compound having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring in the photosensitive composition is not particularly limited and is appropriately selected depending on the purpose. 1.0 mass% to 20 mass% is preferable with respect to the solid content of the photosensitive composition, and 1.5 mass% to 10 mass% is more preferable. When the content is less than 1.0% by mass, sufficient insulating properties may not be exhibited. When the content exceeds 20% by mass, heat resistance may be deteriorated. When the content is within the more preferable range, it is advantageous in terms of both heat resistance and insulating properties.

<Polymerizable compound>
There is no restriction | limiting in particular as said polymeric compound, Although it can select suitably according to the objective, The compound which has at least 1 addition polymerizable group in a molecule | numerator is preferable. As such a compound, at least one selected from monomers having a (meth) acryl group is more preferable.
The polymerizable compound is a compound different from a compound having at least one of a group capable of reacting with the radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring.

There is no restriction | limiting in particular as a monomer which has the said (meth) acryl group, According to the objective, it can select suitably, For example, polyethyleneglycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate, phenoxyethyl (meth) ) Monofunctional acrylates and monofunctional methacrylates such as acrylates; polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, trimethylolethane tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolpropanedi (Meth) acrylate, neopentyl glycol di (meth) acrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, Pentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) acrylate, hexanediol di (meth) acrylate, dicyclopentanyldimethanol di (meth) acrylate, trimethylolpropane tri (acryloyloxypropyl) ether, tri ( After addition reaction of ethylene oxide or propylene oxide to polyfunctional alcohols such as (acryloyloxyethyl) isocyanurate, tri (acryloyloxyethyl) cyanurate, glycerin tri (meth) acrylate, trimethylolpropane, glycerin, bisphenol (meth) Acrylate, described in JP-B-48-41708, JP-B-50-6034, JP-A-51-37193, etc. Urethane acrylates; polyester acrylates described in JP-A-48-64183, JP-B-49-43191, JP-B-52-30490, etc .; epoxy resins and (meth) acrylic acid And polyfunctional acrylates and methacrylates such as epoxy acrylates, which are reaction products. Among these, dicyclopentanyl dimethanol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) acrylate Is more preferable.

-Content of polymerizable compound-
The content of the polymerizable compound in the photosensitive composition is not particularly limited and may be appropriately selected depending on the intended purpose. It is 2% by mass to 50% with respect to the solid content of the photosensitive composition. % By mass is preferable, 3% by mass to 40% by mass is more preferable, and 4% by mass to 35% by mass is particularly preferable. When the content of the polymerizable compound is less than 2% by mass, pattern formation may not be possible, and when it exceeds 50% by mass, crack resistance may be inferior. On the other hand, when the content of the polymerizable compound is within the particularly preferable range, it is advantageous in that the pattern formability and crack resistance are improved.

<Photopolymerization initiator>
The photopolymerization initiator is not particularly limited as long as it has the ability to initiate polymerization of the polymerizable compound, and can be appropriately selected according to the purpose. For example, a halogenated hydrocarbon derivative, phosphine oxide, hexa Examples include arylbiimidazole, oxime derivatives, organic peroxides, thio compounds, ketone compounds, aromatic onium salts, ketoxime ethers, and the like.

Examples of the halogenated hydrocarbon derivative include a halogenated hydrocarbon derivative having a triazine skeleton and a halogenated hydrocarbon derivative having an oxadiazole skeleton.
The halogenated hydrocarbon derivative having a triazine skeleton is not particularly limited and may be appropriately selected depending on the intended purpose. For example, Wakabayashi et al., Bull. Chem. Soc. Japan, 42, 2924 (1969), compounds described in British Patent No. 1388492, compounds described in JP-A-53-133428, German Patent No. 3337024 Compounds, F.I. C. J. Schaefer et al. Org. Chem. 29, 1527 (1964), a compound described in JP-A-62-258241, a compound described in JP-A-5-281728, and a compound described in JP-A-5-34920 And the like.
Examples of the halogenated hydrocarbon derivative having an oxadiazole skeleton include compounds described in US Pat. No. 4,221,976.

The oxime derivative is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include compounds described in paragraph “0085” of JP-A-2007-2030.

The ketone compound is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include compounds described in paragraph “0087” of JP-A-2007-2030.

In addition, examples of photopolymerization initiators other than the above include compounds described in paragraph “0086” of JP-A-2007-2030.

In addition to the photopolymerization initiator, a sensitizer can be added for the purpose of adjusting the exposure sensitivity and the photosensitive wavelength in exposure to the photosensitive layer described later.
The sensitizer can be appropriately selected by a visible light, an ultraviolet laser, a visible light laser or the like as a light irradiation means described later.
The sensitizer is excited by active energy rays and interacts with other substances (for example, radical generator, acid generator, etc.) (for example, energy transfer, electron transfer, etc.), thereby generating radicals, acids, etc. It is possible to generate a useful group of

The sensitizer is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include the compounds described in paragraph “0089” of JP2007-2030A.

The combination of the photopolymerization initiator and the sensitizer is not particularly limited and may be appropriately selected depending on the intended purpose. For example, an electron transfer type initiation system described in JP-A-2001-305734 [ (1) Electron donating initiator and sensitizing dye, (2) Electron accepting initiator and sensitizing dye, (3) Electron donating initiator, sensitizing dye and electron accepting initiator (ternary initiation system) ] Etc. are mentioned.

The content of the sensitizer is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 0.05% by mass to 30% by mass with respect to the solid content of the photosensitive composition. 0.1 mass% to 20 mass% is more preferable, and 0.2 mass% to 10 mass% is particularly preferable. When the content of the sensitizer is less than 0.05% by mass, the sensitivity to active energy rays decreases, the exposure process takes time, and the productivity may decrease, exceeding 30% by mass. In some cases, the sensitizer may precipitate from the photosensitive layer during storage.

The said photoinitiator may be used individually by 1 type, and may use 2 or more types together.
Particularly preferred examples of the photopolymerization initiator include phosphine oxides, α-aminoalkyl ketones, halogenated hydrocarbon compounds having a triazine skeleton, which are compatible with laser light having a wavelength of 405 nm in the later-described exposure. Examples thereof include a composite photoinitiator combined with an amine compound as a sensitizer, a hexaarylbiimidazole compound, and titanocene.

-Content of photopolymerization initiator-
There is no restriction | limiting in particular as content in the said photosensitive composition of the said photoinitiator, Although it can select suitably according to the objective, 0.5 mass% with respect to solid content of the said photosensitive composition Is preferably 20% by mass, more preferably 0.5% by mass to 15% by mass, and particularly preferably 1% by mass to 10% by mass. When the content of the photopolymerization initiator is less than 0.5% by mass, the exposed area tends to be eluted during development, and when it exceeds 20% by mass, the heat resistance may be lowered. On the other hand, when the content of the photopolymerization initiator is within the particularly preferable range, it is advantageous in that a good pattern can be formed and heat resistance is also improved.

<Thermal crosslinking agent>
The thermal crosslinking agent is not particularly limited and may be appropriately selected depending on the intended purpose, but has at least one functional group selected from a cyclic ether group, a blocked isocyanate group, an oxazolyl group, and an ethylene carbonate group. Compounds are preferred.

Examples of the thermal crosslinking agent include a compound having a cyclic ether group, a compound having a blocked isocyanate group, a compound having an oxazolyl group, and a compound having an ethylene carbonate group.

Examples of the compound having a cyclic ether group include a compound having an oxirane group and a compound having an oxetanyl group.
Examples of the compound having an oxirane group include an epoxy compound having at least two oxirane groups in one molecule.
Examples of the compound having an oxetanyl group include an oxetane compound having at least two oxetanyl groups in one molecule.

There is no restriction | limiting in particular as said epoxy compound, According to the objective, it can select suitably, For example, a bixylenol type or biphenol type epoxy resin ("YX4000; Mitsubishi Chemical Corporation" etc.) or these mixtures, isocyanurate Heterocyclic epoxy resins having a skeleton ("TEPIC; manufactured by Nissan Chemical Industries", "Araldite PT810; manufactured by Ciba Specialty Chemicals"), bisphenol A type epoxy resin, novolak type epoxy resin, bisphenol F type epoxy Resin ("Epototo YDF-170, manufactured by Nippon Steel Chemical Co., Ltd."), hydrogenated bisphenol A type epoxy resin, glycidylamine type epoxy resin, hydantoin type epoxy resin, alicyclic epoxy resin, trihydroxyphenylmethane type epoxy resin , Bisphenol Type epoxy resin, bisphenol A novolac type epoxy resin, tetraphenylolethane type epoxy resin, glycidyl phthalate resin, tetraglycidyl xylenoyl ethane resin, naphthalene group-containing epoxy resin (“ESN-190, ESN-360; Nippon Steel Chemical Co., Ltd.) ”,“ HP-4032, EXA-4750, EXA-4700; manufactured by DIC ”, etc.), epoxy resins having a dicyclopentadiene skeleton (“ HP-7200, HP-7200H; manufactured by DIC ”, etc.), glycidyl Examples thereof include a methacrylate copolymer epoxy resin (“CP-50S, CP-50M; manufactured by NOF Corporation”), a copolymer epoxy resin of cyclohexylmaleimide and glycidyl methacrylate, and the like. These epoxy compounds may be used individually by 1 type, and may use 2 or more types together.

The oxetane compound is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a polyfunctional oxetane compound described in paragraph “0096” of JP-A-2007-2030.

The compound having a blocked isocyanate group is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include compounds obtained by reacting an isocyanate group of polyisocyanate and its derivatives with a blocking agent. Examples of such a compound include blocked polyisocyanate described in paragraph “0023” of JP-A-5-9407.

The compound having an oxazolyl group is not particularly limited and may be appropriately selected depending on the intended purpose. For example, it is obtained by polymerizing an unsaturated monomer having an oxazolyl group with another unsaturated monomer as necessary. Resin etc. are mentioned. Examples of the unsaturated monomer having an oxazolyl group include vinyl oxazoline compounds such as 2-isopropenyl-2-oxazoline. A commercial item can be used as a compound which has the said oxazolyl group. Examples of the commercially available product include EPOCROS RPS-1005 manufactured by Nippon Shokubai Co., Ltd.

The compound having an ethylene carbonate group is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include an acrylic resin having an ethylene carbonate group. Examples of the acrylic resin having an ethylene carbonate group include carbonate group-containing copolymers described in JP-A-1-146968.

These may be used individually by 1 type and may use 2 or more types together.
Among these, a compound having an oxirane group is preferable in terms of the smoothness of the pattern side surface and the insulating property.

-Content of thermal crosslinking agent-
The content of the thermal crosslinking agent in the photosensitive composition is not particularly limited and may be appropriately selected depending on the intended purpose, but is 1% by mass to 50% with respect to the solid content of the photosensitive composition. % By mass is preferable, 2% by mass to 40% by mass is more preferable, and 3% by mass to 30% by mass is particularly preferable. When the content of the thermal crosslinking agent is less than 1% by mass, heat resistance may be deteriorated, and when it exceeds 50% by mass, developability and crack resistance may be deteriorated. On the other hand, when the content is within the particularly preferable range, a cured film can be produced with good sensitivity, and the formed cured film is advantageous in that both heat resistance and crack resistance can be achieved.

<Carboxyl group-containing polymer compound>
The carboxyl group-containing polymer compound is not particularly limited as long as it is a polymer compound having a carboxyl group, and can be appropriately selected according to the purpose. For example, an acid-modified ethylenically unsaturated group-containing polyurethane resin, Examples thereof include an acid-modified ethylenically unsaturated group-containing epoxy resin, an acrylic resin containing an ethylenically unsaturated group and a carboxyl group, and a polyimide precursor. Among these, an acid-modified ethylenically unsaturated group-containing polyurethane resin is preferable in terms of excellent crack resistance.

-Acid-modified ethylenically unsaturated group-containing polyurethane resin-
The acid-modified ethylenically unsaturated group-containing polyurethane resin is not particularly limited as long as it is a polyurethane resin having an acid group carboxyl group and an ethylenically unsaturated group, and can be appropriately selected according to the purpose. For example, (i) a polyurethane resin having an ethylenically unsaturated group in the side chain, (ii) a polyurethane obtained by reacting a carboxyl group-containing polyurethane with a compound having an epoxy group and an ethylenically unsaturated group in the molecule Resin etc. are mentioned.

-(I) Polyurethane resin having an ethylenically unsaturated group in the side chain--
The polyurethane resin having an ethylenically unsaturated group in the side chain is not particularly limited and may be appropriately selected depending on the intended purpose. For example, the side chain may be represented by the following general formulas (1) to (3). What has at least 1 among the functional groups represented is mentioned.

In the general formula (1), R ¹ to R ³ each independently represents a hydrogen atom or a monovalent group.
R ¹ is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a hydrogen atom and an alkyl group which may have a substituent. Among these, a hydrogen atom and a methyl group are preferable in terms of high radical reactivity.
The R ² and R ³ are not particularly limited and may be appropriately selected depending on the purpose. For example, each of R ² and R ³ is independently a hydrogen atom, a halogen atom, an amino group, a carboxyl group, an alkoxycarbonyl group, a sulfo group. Group, nitro group, cyano group, alkyl group which may have a substituent, aryl group which may have a substituent, alkoxy group which may have a substituent, aryl which may have a substituent An oxy group, an alkylamino group which may have a substituent, an arylamino group which may have a substituent, an alkylsulfonyl group which may have a substituent, an arylsulfonyl group which may have a substituent Etc. Among these, a hydrogen atom, a carboxyl group, an alkoxycarbonyl group, an alkyl group which may have a substituent, and an aryl group which may have a substituent are preferable because of high radical reactivity.

In the general formula (1), X represents an oxygen atom, a sulfur atom, or —N (R ¹² ) —, and R ¹² represents a hydrogen atom or a monovalent organic group. R ¹² is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include an alkyl group which may have a substituent. Among these, a hydrogen atom, a methyl group, an ethyl group, and an isopropyl group are preferable because of high radical reactivity.

Here, the substituent that can be introduced is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include an alkyl group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an aryloxy group, and a halogen atom. Amino group, alkylamino group, arylamino group, carboxyl group, alkoxycarbonyl group, sulfo group, nitro group, cyano group, amide group, alkylsulfonyl group, arylsulfonyl group and the like.

In the general formula (2), R ⁴ to R ⁸ each independently represents a hydrogen atom or a monovalent group. R ⁴ to R ⁸ are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a hydrogen atom, a halogen atom, an amino group, a dialkylamino group, a carboxyl group, an alkoxycarbonyl group, a sulfo group, Nitro group, cyano group, alkyl group which may have a substituent, aryl group which may have a substituent, alkoxy group which may have a substituent, aryloxy group which may have a substituent An alkylamino group which may have a substituent, an arylamino group which may have a substituent, an alkylsulfonyl group which may have a substituent, an arylsulfonyl group which may have a substituent, and the like Can be mentioned. Among these, a hydrogen atom, a carboxyl group, an alkoxycarbonyl group, an alkyl group which may have a substituent, and an aryl group which may have a substituent are preferable because of high radical reactivity.

Examples of the substituent that can be introduced include those similar to those of the general formula (1). Y represents an oxygen atom, a sulfur atom, or —N (R ¹² ) —. Wherein ^{R 12} has the same meaning as ^{R 12} in the general formula (1), and preferred examples are also the same.

In the general formula (3), R ⁹ to R ¹¹ each independently represents a hydrogen atom or a monovalent group.
Examples of R ^9, is not particularly limited and may be appropriately selected depending on the purpose, for example, an alkyl group which may have a hydrogen atom or a substituent. Among these, a hydrogen atom and a methyl group are preferable in terms of high radical reactivity.
R ¹⁰ and R ¹¹ are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a hydrogen atom, a halogen atom, an amino group, a dialkylamino group, a carboxyl group, an alkoxycarbonyl group, a sulfo group, Nitro group, cyano group, alkyl group which may have a substituent, aryl group which may have a substituent, alkoxy group which may have a substituent, aryloxy group which may have a substituent An alkylamino group which may have a substituent, an arylamino group which may have a substituent, an alkylsulfonyl group which may have a substituent, an arylsulfonyl group which may have a substituent, and the like Can be mentioned. Among these, a hydrogen atom, a carboxyl group, an alkoxycarbonyl group, an alkyl group which may have a substituent, and an aryl group which may have a substituent are preferable because of high radical reactivity.

Here, examples of the substituent that can be introduced include those similar to those in the general formula (1). In the general formula (3), Z represents an oxygen atom, a sulfur atom, —N (R ¹³ ) —, or an optionally substituted phenylene group. R ¹³ is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include an alkyl group which may have a substituent. Among these, a methyl group, an ethyl group, and an isopropyl group are preferable because of high radical reactivity.

The polyurethane resin having an ethylenically unsaturated group in the side chain includes at least one diisocyanate compound represented by the following general formula (4) and at least one diol compound represented by the following general formula (5): A polyurethane resin having a structural unit represented by the reaction product as a basic skeleton.

OCN-X ⁰ -NCO General formula (4)
HO—Y ⁰ —OH —General formula (5)
In the general formula (4) and the general formula (5), X ⁰ and Y ⁰ each independently represent a divalent organic residue.

At least one of the diisocyanate compound represented by the general formula (4) and the diol compound represented by the general formula (5) is a group represented by the general formulas (1) to (3). If at least one of them is present, a polyurethane resin in which the groups represented by the general formulas (1) to (3) are introduced into the side chain as a reaction product of the diisocyanate compound and the diol compound is provided. Generated. According to the method, the polyurethane resin in which the groups represented by the general formulas (1) to (3) are introduced into the side chain rather than replacing and / or introducing the desired side chain after the reaction of the polyurethane resin is produced. Can be easily manufactured.

The diisocyanate compound represented by the general formula (4) is not particularly limited and may be appropriately selected depending on the intended purpose. For example, a monofunctional alcohol or a monofunctional alcohol having a triisocyanate compound and an ethylenically unsaturated group may be used. Examples thereof include diisocyanate compounds that can be obtained by addition reaction with 1 equivalent of a functional amine compound.

The triisocyanate compound is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include compounds described in paragraphs “0034” to “0035” of JP-A-2005-250438. Is mentioned.

The monofunctional alcohol having an ethylenically unsaturated group or the monofunctional amine compound is not particularly limited and may be appropriately selected depending on the intended purpose. For example, paragraph “Japanese Patent Laid-Open No. 2005-250438” And compounds described in “0037” to “0040”.

Here, the method for introducing an ethylenically unsaturated group into the side chain of the polyurethane resin is not particularly limited and may be appropriately selected depending on the intended purpose. A method using a diisocyanate compound containing a polymerizable unsaturated group is preferred. There is no restriction | limiting in particular as said diisocyanate compound, According to the objective, it can select suitably, A triisocyanate compound and the monofunctional alcohol which has an ethylenically unsaturated group, or 1 equivalent of monofunctional amine compounds are made to react. Examples of the diisocyanate compound that can be obtained by the method include compounds having an ethylenically unsaturated group in the side chain described in paragraphs “0042” to “0049” of JP-A-2005-250438.

The polyurethane resin having an ethylenically unsaturated group in the side chain contains the ethylenically unsaturated group from the viewpoint of improving compatibility with other components in the photosensitive composition and improving storage stability. It is also possible to copolymerize diisocyanate compounds other than the diisocyanate compound.

The diisocyanate compound to be copolymerized is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a diisocyanate compound represented by the following general formula (6).
OCN-L ¹ -NCO General formula (6)
In the general formula (6), L ¹ is a divalent aliphatic which may have a substituent (for example, any of an alkyl group, an aralkyl group, an aryl group, an alkoxy group, and a halogeno group is preferable). Or represents an aromatic hydrocarbon group. If necessary, L ¹ may have any other functional group that does not react with an isocyanate group, such as an ester group, a urethane group, an amide group, or a ureido group.

The diisocyanate compound represented by the general formula (6) is not particularly limited and may be appropriately selected depending on the intended purpose. For example, dimer of 2,4-tolylene diisocyanate and 2,4-tolylene diisocyanate 2,6-tolylene diisocyanate, p-xylylene diisocyanate, m-xylylene diisocyanate, 4,4'-diphenylmethane diisocyanate, 1,5-naphthylene diisocyanate, 3,3'-dimethylbiphenyl-4,4 Aromatic diisocyanate compounds such as' -diisocyanate; aliphatic diisocyanate compounds such as hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, lysine diisocyanate, dimer diisocyanate; isophorone diisocyanate, 4,4 -Alicyclic diisocyanate compounds such as methylenebis (cyclohexyl isocyanate), methylcyclohexane-2,4 (or 2,6) diisocyanate, 1,3- (isocyanatomethyl) cyclohexane; 1 mol of 1,3-butylene glycol and tolylene diisocyanate A diisocyanate compound which is a reaction product of a diol and a diisocyanate such as an adduct of 2 moles can be used. These may be used individually by 1 type and may use 2 or more types together.

There is no restriction | limiting in particular as a diol compound represented by the said General formula (5), According to the objective, it can select suitably, For example, high molecular diols, such as a polyether diol compound, a polyester diol compound, and a polycarbonate diol compound Compounds: Low molecular diol compounds such as ethylene glycol and neopentyl glycol; diol compounds having an ethylenically unsaturated group; diol compounds having a carboxylic acid group.

Here, as a method for introducing an ethylenically unsaturated group into the side chain of the polyurethane resin, in addition to the above-described method, a diol compound containing an ethylenically unsaturated group in the side chain is used as a raw material for producing the polyurethane resin. A method is also preferred. The diol compound containing an ethylenically unsaturated group in the side chain may be a commercially available compound such as trimethylolpropane monoallyl ether, or a compound such as a halogenated diol compound, a triol compound, or an aminodiol compound. And compounds that are easily produced by reaction with a compound containing an ethylenically unsaturated group, such as a carboxylic acid, an acid chloride, an isocyanate, an alcohol, an amine, a thiol, or a halogenated alkyl compound.

The diol compound containing an ethylenically unsaturated group in the side chain is not particularly limited and may be appropriately selected depending on the intended purpose. For example, paragraphs “0057” to “0060” of JP-A-2005-250438 can be used. , Compounds obtained by ring-opening a tetracarboxylic dianhydride described in paragraphs “0095” to “0101” of JP-A-2005-250438 with a diol compound, represented by the following general formula (G) Examples thereof include compounds described in paragraphs “0064” to “0066” of JP-A-2005-250438. Among these, compounds described in paragraphs “0064” to “0066” of JP-A-2005-250438 represented by the following general formula (G) are preferable.

In the general formula (G), R ¹ to R ³ each independently represents a hydrogen atom or a monovalent group, A represents a divalent organic residue, X represents an oxygen atom, a sulfur atom, or — N (R ¹² ) —, wherein R ¹² represents a hydrogen atom or a monovalent organic group.
Incidentally, ^R 1 ~ ^{R 3} and X in the general formula (G), said a general formula (1) the same meaning as ^R 1 ~ ^{R 3} and X in preferred embodiments versa.
By using the polyurethane resin derived from the diol compound represented by the general formula (G), the effect of suppressing the excessive molecular movement of the polymer main chain caused by the secondary alcohol having a large steric hindrance can be reduced. It is thought that improvement can be achieved.

The polyurethane resin having an ethylenically unsaturated group in the side chain is, for example, ethylenic in the side chain from the viewpoint of improving compatibility with other components in the photosensitive composition and improving storage stability. A diol compound other than a diol compound containing an unsaturated group can be copolymerized.
The diol compound other than the diol compound containing an ethylenically unsaturated group in the side chain is not particularly limited and may be appropriately selected depending on the intended purpose. For example, a polyether diol compound, a polyester diol compound, a polycarbonate diol Compound etc. are mentioned.

The polyether diol compound is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include compounds described in paragraphs “0068” to “0076” of JP-A-2005-250438. It is done.

The polyester diol compound is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include paragraphs “0077” to “0079” and paragraphs “0083” to “0085” of JP-A-2005-250438. No. 1-No. 8 and no. 13-No. 18 and the like.

The polycarbonate diol compound is not particularly limited and may be appropriately selected depending on the intended purpose. For example, in the paragraphs “0080” to “0081” and paragraph “0084” of JP-A-2005-250438, No. 9-No. 12 listed compounds.

Moreover, in the synthesis | combination of the polyurethane resin which has an ethylenically unsaturated group in the said side chain, the diol compound which has a substituent which does not react with an isocyanate group other than the diol compound mentioned above can also be used together.
The diol compound having a substituent that does not react with the isocyanate group is not particularly limited and may be appropriately selected depending on the intended purpose. For example, in paragraphs “0087” to “0088” of JP-A-2005-250438 And the compounds described.

Furthermore, in the synthesis of the polyurethane resin having an ethylenically unsaturated group in the side chain, a diol compound having a carboxyl group can be used in combination with the diol compound described above. The diol compound having a carboxyl group is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include compounds represented by the following general formulas (8) to (10).

In the general formulas (8) to (10), R ¹⁵ is a hydrogen atom, a substituent (for example, a cyano group, a ditro group, a halogen atom (—F, —Cl, —Br, —I), —CONH ₂ , —COOR ¹⁶ , —OR ¹⁶ , —NHCONHR ¹⁶ , —NHCOOR ¹⁶ , —NHCOR ¹⁶ , —OCONHR ¹⁶ (wherein R ¹⁶ is an alkyl group having 1 to 10 carbon atoms, or 7 to 15 carbon atoms) Represents an aralkyl group.) Represents an alkyl group, an aralkyl group, an aryl group, an alkoxy group, or an aryloxy group which may have a group. Among these, a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, and an aryl group having 6 to 15 carbon atoms are preferable.
In the general formulas (8) to (10), L ⁹ , L ¹⁰ and L ¹¹ may be the same or different from each other, and may be a single bond, a substituent (for example, an alkyl group, an aralkyl group, an aryl group). A divalent aliphatic or aromatic hydrocarbon group optionally having a group, an alkoxy group, or a halogeno group). Among these, an alkylene group having 1 to 20 carbon atoms and an arylene group having 6 to 15 carbon atoms are preferable, and an alkylene group having 1 to 8 carbon atoms is more preferable. Further, if necessary, the above L ⁹ to L ¹¹ may have another functional group that does not react with an isocyanate group, for example, a carbonyl group, an ester group, a urethane group, an amide group, a ureido group, or an ether group. . In addition, you may form a ring by two or three of said R < ¹⁵ >, L < ⁷ >, L < ⁸ >, L < ⁹ >.
In the general formula (9), Ar is not particularly limited as long as it represents a trivalent aromatic hydrocarbon group which may have a substituent, and may be appropriately selected according to the purpose. An aromatic group having 6 to 15 carbon atoms is preferable.

The diol compound having a carboxyl group represented by the general formulas (8) to (10) is not particularly limited and may be appropriately selected depending on the intended purpose. For example, 3,5-dihydroxybenzoic acid, 2 , 2-bis (hydroxymethyl) propionic acid, 2,2-bis (2-hydroxyethyl) propionic acid, 2,2-bis (3-hydroxypropyl) propionic acid, bis (hydroxymethyl) acetic acid, bis (4- Hydroxyphenyl) acetic acid, 2,2-bis (hydroxymethyl) butyric acid, 4,4-bis (4-hydroxyphenyl) pentanoic acid, tartaric acid, N, N-dihydroxyethylglycine, N, N-bis (2-hydroxyethyl) ) -3-carboxy-propionamide and the like.

The presence of such a carboxyl group is preferable in that the polyurethane resin can be provided with characteristics such as hydrogen bonding properties and alkali solubility. More specifically, the polyurethane resin having an ethylenically unsaturated group in the side chain is a resin further having a carboxyl group in the side chain, and more specifically, the ethylenically unsaturated group in the side chain is 0. 0.05 mmol / g to 3.0 mmol / g is preferable, 0.5 mmol / g to 2.7 mmol / g is more preferable, and 0.75 mmol / g to 2.4 mmol / g is particularly preferable. Preferably, the side chain has a carboxyl group, and the acid value is preferably 20 mgKOH / g to 120 mgKOH / g, more preferably 30 mgKOH / g to 110 mgKOH / g, and 35 mgKOH / g to 100 mg KOH / g is particularly preferred.
In addition, the said acid value can be measured based on JISK0070, for example. However, if the sample does not dissolve, dioxane or tetrahydrofuran is used as the solvent.

The polyurethane resin having an ethylenically unsaturated group in the side chain is synthesized by adding the above-mentioned diisocyanate compound and diol compound to an aprotic solvent by adding a known catalyst having an activity depending on the reactivity and heating. Is done. The molar ratio (M _a : M _b ) of the diisocyanate and diol compound used in the synthesis is not particularly limited and can be appropriately selected according to the purpose, and is preferably 1: 1 to 1.2: 1. By treating with alcohols or amines, a product having desired physical properties such as molecular weight or viscosity is synthesized in a form in which no isocyanate group remains finally.

Further, as the polyurethane resin having an ethylenically unsaturated group in the side chain, those having an ethylenically unsaturated group in the polymer terminal and main chain are also preferably used. By having an ethylenically unsaturated group at the polymer terminal and main chain, it further has an ethylenically unsaturated group between the photosensitive composition and the polyurethane resin having an ethylenically unsaturated group in the side chain, or in the side chain. Crosslinking reactivity is improved between polyurethane resins, and the strength of the photocured product is increased. As a result, when a polyurethane resin having an ethylenically unsaturated group in the side chain is used for a lithographic printing plate, a material having excellent toughness can be provided.

Examples of the method for introducing an ethylenically unsaturated group at the polymer terminal include the following methods. That is, in the step of synthesizing a polyurethane resin having an ethylenically unsaturated group in the side chain as described above, in the step of treating with a residual isocyanate group at the polymer end and an alcohol or an amine, it has an ethylenically unsaturated group. Alcohols or amines may be used.
Specific examples of such a compound include the same compounds as those exemplified above as the monofunctional alcohol or monofunctional amine compound having an ethylenically unsaturated group.
The ethylenically unsaturated group is preferably introduced into the polymer side chain rather than the polymer end from the viewpoint that the introduction amount can be easily controlled and the introduction amount can be increased, and the crosslinking reaction efficiency is improved. .

The ethylenically unsaturated group to be introduced is not particularly limited and may be appropriately selected according to the purpose. However, in terms of the formation of a crosslinked cured film, an allyl group, a methacryloyl group, an acryloyl group, and a vinylphenyl group are preferable. Preferably, a methacryloyl group and an acryloyl group are more preferable, and a methacryloyl group is particularly preferable in terms of both the formability of the crosslinked cured film and the raw storage stability.
The amount of methacryloyl group introduced is not particularly limited and may be appropriately selected depending on the intended purpose. The ethylenically unsaturated group equivalent is preferably 0.05 mmol / g to 3.0 mmol / g, 0.5 mmol / g to 2.7 mmol / g is more preferable, and 0.75 mmol / g to 2.4 mmol / g is particularly preferable.

As a method of introducing an ethylenically unsaturated group into the main chain, there is a method of using a diol compound having an ethylenically unsaturated group in the main chain direction for the synthesis of a polyurethane resin. The diol compound having an ethylenically unsaturated group in the main chain direction is not particularly limited and may be appropriately selected depending on the intended purpose, such as cis-2-butene-1,4-diol, trans-2-butene 1,4-diol, polybutadiene diol and the like.

The polyurethane resin having an ethylenically unsaturated group in the side chain can be used in combination with an alkali-soluble polymer containing a polyurethane resin having a structure different from that of the specific polyurethane resin. For example, the polyurethane resin having an ethylenically unsaturated group in the side chain can be used in combination with a polyurethane resin containing an aromatic group in the main chain and / or side chain.

Specific examples of the (i) polyurethane resin having an ethylenically unsaturated group in the side chain include, for example, P-1 to P— shown in paragraphs “0293” to “0310” of JP-A-2005-250438. And 31 polymers. Among these, polymers of P-27 and P-28 shown in paragraphs “0308” and “0309” are preferable.

-(Ii) Polyurethane resin obtained by reacting a carboxyl group-containing polyurethane with a compound having an epoxy group and an ethylenically unsaturated group in the molecule--
A polyurethane resin obtained by reacting the carboxyl group-containing polyurethane with a compound having an epoxy group and an ethylenically unsaturated group in the molecule includes a carboxyl group-containing polyurethane having a diisocyanate and a carboxylic acid group-containing diol as essential components; A polyurethane resin obtained by reacting an epoxy group and a compound having an ethylenically unsaturated group in the molecule. Depending on the purpose, a low molecular diol having a weight average molecular weight of 300 or less or a low molecular diol having a weight average molecular weight of 500 or more may be added as a diol component as a copolymer component.
By using the polyurethane resin, it is excellent in stable dispersibility with an inorganic filler, crack resistance and impact resistance, so that heat resistance, moist heat resistance, adhesion, mechanical properties, and electrical properties are improved.

The polyurethane resin includes a divalent aliphatic or aromatic hydrocarbon diisocyanate which may have a substituent, a COOH group and two OH groups via any one of a C atom and an N atom. A reaction product comprising a carboxylic acid-containing diol as an essential component, and reacting the obtained reaction product with a compound having an epoxy group and an ethylenically unsaturated group in the molecule via a —COO— bond. It may be obtained.

Further, the polyurethane resin includes at least one selected from diisocyanates represented by the following general formula (11) and carboxylic acid group-containing diols represented by the following general formulas (12-1) to (12-3): Is obtained by reacting a product having an essential component with a compound having an epoxy group and an ethylenically unsaturated group in the molecule represented by the following general formulas (13-1) to (13-16). May be.

However, in the general formula (11), R ₁ may have a substituent (for example, any of an alkyl group, an aralkyl group, an aryl group, an alkoxy group, and a halogeno group is preferable). Represents an aromatic or aromatic hydrocarbon. If necessary, R ₁ may have any other functional group that does not react with an isocyanate group, such as an ester group, a urethane group, an amide group, or a ureido group. In the general formula (12-1), R ₂ represents a hydrogen atom, a substituent (for example, a cyano group, a ditro group, a halogen atom (—F, —Cl, —Br, —I), —CONH ₂ , — COOR ₆ , —OR ₆ , —NHCONHR ₆ , —NHCOOR ₆ , —NHCOR ₆ , —OCONHR ₆ , —CONHR ₆ (where R ₆ is an alkyl group having 1 to 10 carbon atoms and aralkyl having 7 to 15 carbon atoms) Each group is included), which may have an alkyl group, an aralkyl group, an aryl group, an alkoxy group, or an aryloxy group. Among these, a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, and an aryl group having 6 to 15 carbon atoms are preferable. In the general formulas (12-1), (12-2) and (12-3), R ₃ , R ₄ and R ₅ may be the same or different from each other, and may be a single bond, a substituent (for example, , An alkyl group, an aralkyl group, an aryl group, an alkoxy group, and a halogeno group are preferable), and may represent a divalent aliphatic or aromatic hydrocarbon. Among these, an alkylene group having 1 to 20 carbon atoms and an arylene group having 6 to 15 carbon atoms are preferable, and an alkylene group having 1 to 8 carbon atoms is more preferable. Further, if necessary, in R ₃ , R ₄ and R ₅ , any other functional group that does not react with an isocyanate group, for example, a carbonyl group, an ester group, a urethane group, an amide group, a ureido group, or an ether group. You may have. In addition, you may form a ring by 2 or 3 of said R < ₂ >, R < ₃ >, R < ₄ > and R < ₅ >. Ar represents a trivalent aromatic hydrocarbon which may have a substituent, and is preferably an aromatic group having 6 to 15 carbon atoms.

In the general formulas (13-1) to (13-16), R ₁₄ represents a hydrogen atom or a methyl group, R ₁₅ represents an alkylene group having 1 to 10 carbon atoms, and R ₁₆ represents a carbon atom. This represents a hydrocarbon group having a number of 1 to 10. p represents 0 or an integer of 1 to 10.

Examples of the polyurethane resin include at least one selected from diisocyanates represented by the general formula (11) and carboxylic acid group-containing diols represented by the general formulas (12-1) to (12-3). The reaction product is further reacted with a compound having one epoxy group and at least one (meth) acryl group in the molecule represented by any one of the general formulas (13-1) to (13-16). An alkali-soluble photo-crosslinkable polyurethane resin having an acid value of 20 mgKOH / g to 120 mgKOH / g is preferred.

These polymer compounds may be used alone or in combination of two or more.

--- Synthesis of polyurethane resin obtained by reacting carboxyl group-containing polyurethane with compound having epoxy group and ethylenically unsaturated group in the molecule ---
As a method for synthesizing the polyurethane resin, the diisocyanate compound and the diol compound are synthesized in an aprotic solvent by adding a known catalyst having an activity corresponding to each reactivity and heating. The molar ratio of the diisocyanate and diol compound to be used is preferably 0.8: 1 to 1.2: 1. If an isocyanate group remains at the end of the polymer, the molar ratio can be reduced by treatment with alcohols or amines. It is synthesized in such a way that no isocyanate groups remain entangled.

---- Diisocyanate ----
The diisocyanate compound represented by the general formula (11) is not particularly limited and may be appropriately selected depending on the intended purpose. For example, compounds described in paragraph “0021” of JP-A-2007-2030, etc. Is mentioned.

--Diol containing carboxylic acid group ----
The diol compound having a carboxyl group represented by the general formulas (12-1) to (12-3) is not particularly limited and may be appropriately selected depending on the intended purpose. And the compounds described in paragraph “0047” of the publication No. 2030.

---- Low molecular weight diol containing no carboxylic acid groups ----
The carboxylic acid group-free low molecular weight diol is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include compounds described in paragraph “0048” of JP-A-2007-2030. It is done.
The copolymerization amount of the carboxylic acid group-free diol is preferably 95 mol% or less, more preferably 80 mol% or less, and particularly preferably 50 mol% or less in the low molecular weight diol. When the copolymerization amount exceeds 95 mol%, a urethane resin having good developability may not be obtained.

Specific examples of the polyurethane resin obtained by reacting the above (ii) carboxyl group-containing polyurethane with a compound having an epoxy group and an ethylenically unsaturated group in the molecule include, for example, paragraph “Japanese Patent Application Laid-Open No. 2007-2030”. Glycidyl acrylate as an epoxy group and ethylenically unsaturated group-containing compound in the polymers of U1 to U13, U1 to U4 and U6 to U11 shown in "0314" to "0315" is converted into glycidyl methacrylate, 3,4-epoxycyclohexylmethyl. Examples thereof include polymers in place of acrylate (trade name: Cyclomer A400 (manufactured by Daicel Chemical Industries)) and 3,4-epoxycyclohexylmethyl methacrylate (trade name: Cyclomer M400 (manufactured by Daicel Chemical Industries)).

-Weight average molecular weight of acid-modified ethylenically unsaturated group-containing polyurethane resin-
The weight average molecular weight of the acid-modified ethylenically unsaturated group-containing polyurethane resin is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 2,000 to 60,000, and preferably 3,000 to 50 3,000 is more preferable, and 3,000 to 30,000 is particularly preferable. When the weight average molecular weight is less than 2,000, a sufficiently low elastic modulus at a high temperature of the cured film may not be obtained, and when it exceeds 60,000, coating suitability and developability may deteriorate. is there. On the other hand, when the photosensitive composition is used as a photosensitive solder resist when the weight average molecular weight is 2,000 to 60,000, it is excellent in crack resistance and heat resistance, and is non-image area by an alkaline developer. Excellent developability.
The weight average molecular weight is determined by using, for example, a high-speed GPC apparatus (HLC-802A manufactured by Toyo Soda Kogyo Co., Ltd.) and using a 0.5 mass% tetrahydrofuran (THF) solution as a sample solution, and the column is TSKgel HZM- Using one M, 200 μL of sample can be injected, eluted with the THF solution, and measured at 25 ° C. with a refractive index detector or a UV detector (detection wavelength 254 nm).

-Acid value of acid-modified ethylenically unsaturated group-containing polyurethane resin-
The acid value of the acid-modified ethylenically unsaturated group-containing polyurethane resin is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 20 mgKOH / g to 120 mgKOH / g, preferably 30 mgKOH / g to 110 mgKOH / g is more preferable, and 35 mgKOH / g to 100 mgKOH / g is particularly preferable. If the acid value is less than 20 mg KOH / g, the developability may be insufficient, and if it exceeds 120 mg KOH / g, the development speed may be too high, and development control may be difficult.
In addition, the said acid value can be measured based on JISK0070, for example. However, if the sample does not dissolve, dioxane or tetrahydrofuran is used as the solvent.

--Equivalent ethylenically unsaturated group of acid-modified ethylenically unsaturated group-containing polyurethane resin--
The ethylenically unsaturated group equivalent of the acid-modified ethylenically unsaturated group-containing polyurethane resin is not particularly limited and may be appropriately selected depending on the intended purpose, but is 0.05 mmol / g to 3.0 mmol / g. Preferably, 0.5 mmol / g to 2.7 mmol / g is more preferable, and 0.75 mmol / g to 2.4 mmol / g is particularly preferable. When the ethylenically unsaturated group equivalent is less than 0.05 mmol / g, the heat resistance of the cured film may be inferior, and when it exceeds 3.0 mmol / g, the brittleness of the cured film may increase.
The said ethylenically unsaturated group equivalent can be calculated | required by measuring a bromine number, for example. The bromine number can be measured according to, for example, JIS K2605.

-Acid-modified ethylenically unsaturated group-containing epoxy resin-
The acid-modified ethylenically unsaturated group-containing epoxy resin is not particularly limited and may be appropriately selected depending on the intended purpose. For example, at least two or more per molecule described in Japanese Patent No. 2877659 An epoxy compound (a) having an epoxy group, a compound (b) having one reactive group other than a hydroxyl group that reacts with at least two hydroxyl groups and an epoxy group in one molecule, and an ethylenically unsaturated group-containing monocarboxylic acid Acid-modified ethylenically unsaturated group-containing epoxy resin which is a reaction product of acid (c) product (I) and polybasic acid anhydride (d), epoxy having at least two epoxy groups in one molecule Compound (a), compound (b) having one reactive group other than a hydroxyl group that reacts with at least two hydroxyl groups and an epoxy group in one molecule, and an ethylenically unsaturated group-containing monomer An acid-modified ethylenically unsaturated group-containing epoxy resin, which is a product of a product (I) of a boric acid (c), a polybasic acid anhydride (d), and an ethylenically unsaturated group-containing monoisocyanate (e) Can be mentioned.

Commercially available products can be used as the acid-modified ethylenically unsaturated group-containing epoxy resin. Examples of commercially available acid-modified ethylenically unsaturated group-containing epoxy resins include ZFR series, CCR series, and PCR series (manufactured by Nippon Kayaku Co., Ltd.).

-Acrylic resin containing ethylenically unsaturated groups and carboxyl groups-
There is no restriction | limiting in particular as an acrylic resin containing the said ethylenically unsaturated group and a carboxyl group, According to the objective, it can select suitably, For example, it contains a (meth) acrylic acid ester and an ethylenically unsaturated group. An acrylic resin obtained by adding a (meth) acrylate having an epoxy group to a part of acid groups of a copolymer obtained from a compound having at least one acid group.
As such an acrylic resin, for example, it is obtained from (meth) acrylic acid ester and a compound containing an ethylenically unsaturated group and having at least one acid group described in JP-A-2009-86376. Examples thereof include a modified copolymer obtained by adding glycidyl (meth) acrylate to a part of acid groups of the obtained copolymer.
A commercial item can be used for the acrylic resin containing the said ethylenically unsaturated group and a carboxyl group. As a commercial item of the acrylic resin containing the said ethylenically unsaturated group and a carboxyl group, CyclomerP 200HM (made by Daicel Chemical Industries) etc. are mentioned, for example.

-Polyimide precursor-
There is no restriction | limiting in particular as said polyimide precursor, According to the objective, it can select suitably, For example, what was described in Unexamined-Japanese-Patent No. 2010-6946 etc. is mentioned.

--Content of carboxyl group-containing polymer compound--
There is no restriction | limiting in particular as content in the said photosensitive composition of the said carboxyl group-containing high molecular compound, Although it can select suitably according to the objective, 5 mass with respect to solid content of the said photosensitive composition % To 80% by mass is preferable, 20% to 75% by mass is more preferable, and 30% to 70% by mass is particularly preferable.
If the content is less than 5% by mass, the crack resistance may not be kept good, and if it exceeds 80% by mass, the heat resistance may be lowered. On the other hand, when the content is within the particularly preferable range, it is advantageous in terms of both good crack resistance and heat resistance.

<Other ingredients>
Examples of the other components include thermoplastic elastomers, thermosetting accelerators, adhesion promoters, thermal polymerization inhibitors, inorganic fillers, colorants, organic solvents, thixotropic agents, antifoaming agents, and leveling agents. Can be mentioned.

-Thermoplastic elastomer-
By adding the thermoplastic elastomer to the photosensitive composition, heat resistance, flexibility and toughness can be imparted to the photosensitive composition.
There is no restriction | limiting in particular as said thermoplastic elastomer, According to the objective, it can select suitably, For example, styrene-type elastomer, olefin-type elastomer, urethane-type elastomer, polyester-type elastomer, polyamide-type elastomer, acrylic-type elastomer, silicone And elastomers and rubber-modified epoxy resins. These may be used individually by 1 type and may use 2 or more types together.
These thermoplastic elastomers are composed of a hard segment component and a soft segment component. In general, the former contributes to heat resistance and strength, and the latter contributes to flexibility and toughness. Moreover, there is no restriction | limiting in particular as a characteristic of the said elastomer, According to the objective, it can select suitably, For example, it is preferable that it is alkali-soluble or swellable in terms of the production efficiency of a image development process.
Examples of the styrene elastomer, olefin elastomer, urethane elastomer, polyester elastomer, polyamide elastomer, acrylic elastomer, silicone elastomer and rubber-modified epoxy resin include, for example, paragraph “ And the like described in “0087” to “0095”.

-Content of thermoplastic elastomer-
The content of the thermoplastic elastomer in the photosensitive composition is not particularly limited and may be appropriately selected depending on the intended purpose. It is 1% by mass to 50% with respect to the solid content of the photosensitive composition. % By mass is preferable, 2% by mass to 20% by mass is more preferable, and 3% by mass to 10% by mass is particularly preferable. If the content is less than 1% by mass, the crack resistance may be inferior, and if it exceeds 50% by mass, the unexposed part may not be eluted with the developer. On the other hand, when the content is within the particularly preferable range, it is advantageous in terms of improving developability and crack resistance.

-Thermosetting accelerator-
The thermosetting accelerator is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include compounds described in paragraph “0101” of JP-A-2007-2030.

-Content of thermosetting accelerator-
There is no restriction | limiting in particular as content in the said photosensitive composition of the said thermosetting accelerator, Although it can select suitably according to the objective, 0.01 mass with respect to solid content of the said photosensitive composition % To 20% by mass is preferable, 0.05% to 15% by mass is more preferable, and 0.1% to 10% by mass is particularly preferable. When the content of the thermosetting accelerator is less than 0.01% by mass, the toughness of the cured film may not be expressed. When the content exceeds 20% by mass, the storage stability of the photosensitive composition may be reduced. May get worse. On the other hand, when the content of the thermosetting accelerator is within the particularly preferable range, it is advantageous in that the storage stability of the photosensitive composition and the physical properties of the cured film are improved.

-Adhesion promoter-
The adhesion promoter is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include compounds described in paragraph “0108” of JP-A-2007-2030.

-Content of adhesion promoter-
There is no restriction | limiting in particular as content in the said photosensitive composition of the said adhesion promoter, Although it can select suitably according to the objective, 0.01 mass% with respect to solid content of the said photosensitive composition Is preferably 20% by mass, more preferably 0.05% by mass to 15% by mass, and particularly preferably 0.1% by mass to 10% by mass. When the content of the adhesion promoter is less than 0.01% by mass, the toughness of the cured film may not be expressed. When the content exceeds 20% by mass, the preservability of the photosensitive composition is deteriorated. There are things to do. On the other hand, when the content is within the particularly preferable range, it is advantageous in that the storage stability of the photosensitive composition and the physical properties of the cured film are improved.

-Thermal polymerization inhibitor-
The thermal polymerization inhibitor is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include compounds described in paragraph “0113” of JP-A-2007-2030.

-Inorganic filler-
The inorganic filler is not particularly limited and may be appropriately selected depending on the intended purpose, but preferably contains silica particles having an average particle diameter (d50) of 0.05 μm to 3.0 μm. When the inorganic filler contains silica particles, the heat resistance of the cured film is improved, the dispersibility with the carboxyl group-containing polymer compound is improved, and the viscosity of the photosensitive composition is maintained in a suitable range. And suitable coating aptitude is obtained.

There is no restriction | limiting in particular as a silica in the said silica particle, According to the objective, it can select suitably, For example, vapor phase method silica, crystalline silica, fused silica etc. are mentioned.
The average particle diameter (d50) of the silica particles is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 0.05 μm to 3.0 μm, more preferably 0.1 μm to 2.5 μm. 0.1 μm to 2.0 μm is particularly preferable.

When the average particle diameter (d50) of the silica particles is less than 0.05 μm, the coating viscosity may increase, and when it exceeds 3.0 μm, smoothness may not be maintained. On the other hand, when the average particle diameter (d50) of the silica particles is within the particularly preferable range, it is advantageous in view of coating viscosity, smoothness of a cured film and heat resistance.
The average particle diameter of the silica particles (d50) is integrated intended to be defined by the integrated value of 50% particle size when expressed in (cumulative) weight percent, intended to be defined as such d50 (D ₅₀₎ Yes, for example, using a dynamic light scattering photometer (trade name DLS7000, manufactured by Otsuka Electronics Co., Ltd.), the measurement principle is a dynamic light scattering method, and the size distribution analysis method is a cumulant method and / or a histogram method. be able to.

-Content of inorganic filler-
The content of the inorganic filler in the photosensitive composition is not particularly limited and may be appropriately selected depending on the intended purpose, but is 1% by mass to the solid content of the photosensitive composition. 60% by mass is preferable, 10% by mass to 60% by mass is more preferable, and 15% by mass to 60% by mass is particularly preferable. When content of the said inorganic filler is less than 1 mass%, heat resistance may be inferior, and when it exceeds 60 mass%, pattern formability may be inferior. On the other hand, when the content is within the particularly preferable range, it is advantageous in that the pattern formability and heat resistance are improved.

-Colorant-
There is no restriction | limiting in particular as said coloring agent, According to the objective, it can select suitably, A coloring pigment and the dye suitably selected from well-known dye can be used.
The color pigment is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include compounds described in paragraph “0106” of JP-A-2007-2030.
There is no restriction | limiting in particular as content in the said photosensitive composition of the said coloring agent, According to the objective, it can select suitably.

-Organic solvent-
The organic solvent is not particularly limited and may be appropriately selected depending on the intended purpose. And the compounds described in “0121”.

-Content of organic solvent-
The content of the organic solvent in the photosensitive composition is not particularly limited and may be appropriately selected depending on the intended purpose. It is 1% by mass to 80% by mass with respect to the solid content of the photosensitive composition. %, Preferably 2% to 70% by weight, more preferably 3% to 60% by weight. When the content of the organic solvent is less than 1% by mass, the viscosity of the composition may be high and it may be difficult to form a coating film. When the content exceeds 80% by mass, it is difficult to control the desired film thickness. May be. On the other hand, when the content of the organic solvent is within the particularly preferable range, it is advantageous from the viewpoint of coating film production suitability.

(Photosensitive solder resist composition)
The photosensitive solder resist composition of the present invention contains the photosensitive composition of the present invention.
According to the photosensitive solder resist composition of the present invention, it is possible to obtain a solder resist excellent in insulation, smoothness of the pattern side surface, and plating resistance.

(Photosensitive solder resist film)
The photosensitive solder resist composition of the present invention can be used as a liquid resist by coating and drying on a substrate on which a conductor wiring is formed, but is particularly useful for the production of a photosensitive solder resist film.
The photosensitive solder resist film of the present invention comprises at least a support and a photosensitive layer, preferably a protective film, and further comprises a cushion layer, an oxygen barrier layer (hereinafter referred to as “PC”) as necessary. It may be abbreviated as “layer”).
There is no restriction | limiting in particular as a form of the said photosensitive soldering resist film, According to the objective, it can select suitably, For example, it has the said photosensitive layer and the said protective film in this order on the said support body. Form: Form in which the PC layer, the photosensitive layer, and the protective film are provided in this order on the support, and the cushion layer, the PC layer, the photosensitive layer, and the protective film on the support. In this order. The photosensitive layer may be a single layer or a plurality of layers.

<Support>
The support is not particularly limited and may be appropriately selected depending on the intended purpose. However, it is preferable that the photosensitive layer can be peeled off and the light transmittance is good, and further the surface smoothness Is more preferable.

There is no restriction | limiting in particular as said support body, According to the objective, it can select suitably, For example, a transparent synthetic resin film is mentioned.
The transparent synthetic resin film is not particularly limited and may be appropriately selected depending on the intended purpose. For example, polyethylene terephthalate, polyethylene naphthalate, polypropylene, polyethylene, cellulose triacetate, cellulose diacetate, poly (meta ) Acrylic acid alkyl ester, poly (meth) acrylic acid ester copolymer, polyvinyl chloride, polyvinyl alcohol, polycarbonate, polystyrene, cellophane, polyvinylidene chloride copolymer, polyamide, polyimide, vinyl chloride / vinyl acetate copolymer, Examples include various plastic films such as polytetrafluoroethylene, polytrifluoroethylene, cellulose-based film, and nylon film. These may be used alone or in combination of two or more. Among these, the transparent synthetic resin film is preferably polyethylene terephthalate.
The support is not particularly limited and may be appropriately selected depending on the intended purpose. For example, JP-A-4-208940, JP-A-5-80503, JP-A-5-173320, JP-A-5-173320 Examples thereof include a support described in JP-A-5-72724.

The thickness of the support is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 4 μm to 300 μm, and more preferably 5 μm to 175 μm.
There is no restriction | limiting in particular as a shape of the said support body, Although it can select suitably according to the objective, A long shape is preferable. The length of the long support is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 10 m to 20,000 m.

<Photosensitive layer>
The photosensitive layer is formed by the photosensitive solder resist composition of the present invention.
There is no restriction | limiting in particular as a location provided in the said photosensitive soldering resist film of the said photosensitive layer, Although it can select suitably according to the objective, Usually, it laminates | stacks on the said support body.

The thickness of the photosensitive layer is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 3 μm to 100 μm, and more preferably 5 μm to 70 μm.

As the method for forming the photosensitive layer, a photosensitive solder resist composition solution is prepared by dissolving, emulsifying, or dispersing the photosensitive solder resist composition of the present invention in water or a solvent on the support, The method of laminating | stacking by applying this solution directly and making it dry is mentioned.

The solvent for the photosensitive solder resist composition solution is not particularly limited and may be appropriately selected depending on the intended purpose. For example, alcohols, ketones, esters, aromatic hydrocarbons, halogenated hydrocarbons , Ethers, dimethylformamide, dimethylacetamide, dimethylsulfoxide, sulfolane and the like.
Examples of the alcohols include methanol, ethanol, n-propanol, isopropanol, n-butanol, sec-butanol, and n-hexanol.
Examples of the ketones include acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, diisobutyl ketone and the like.
Examples of the esters include ethyl acetate, butyl acetate, n-amyl acetate, methyl sulfate, ethyl propionate, dimethyl phthalate, ethyl benzoate, and methoxypropyl acetate.
Examples of the aromatic hydrocarbons include toluene, xylene, benzene, ethylbenzene and the like.
Examples of the halogenated hydrocarbons include carbon tetrachloride, trichloroethylene, chloroform, 1,1,1-trichloroethane, methylene chloride, and monochlorobenzene.
Examples of the ethers include tetrahydrofuran, diethyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, 1-methoxy-2-propanol, and the like.
These may be used individually by 1 type and may use 2 or more types together.

The solid content concentration of the photosensitive solder resist composition solution is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 10% by mass to 90% by mass, and more preferably 15% by mass to 50% by mass. More preferred.

The application method is not particularly limited and may be appropriately selected depending on the intended purpose. For example, using a spin coater, slit spin coater, roll coater, die coater, curtain coater, etc. The method of apply | coating is mentioned.
The drying conditions are not particularly limited and may be appropriately selected depending on the purpose. The drying conditions vary depending on each component, the type of solvent, the use ratio, and the like, but are usually 60 ° C. to 110 ° C. for 30 seconds. About 15 minutes.

<Protective film>
The protective film has a function of preventing and protecting the photosensitive layer from being stained and damaged.
There is no restriction | limiting in particular as a location provided in the said photosensitive soldering resist film of the said protective film, Although it can select suitably according to the objective, Usually, it is provided on the said photosensitive layer.
Examples of the protective film include those used for the support, silicone paper, polyethylene, paper laminated with polypropylene, polyolefin sheets, polytetrafluoroethylene sheets, and the like.
The thickness of the protective film is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 5 μm to 100 μm, and more preferably 8 μm to 30 μm.

When the protective film is used, it is preferable that the adhesive force A between the photosensitive layer and the support and the adhesive force B between the photosensitive layer and the protective film satisfy the relationship of adhesive force A> adhesive force B.
Examples of the combination of the support and the protective film (support / protective film) include polyethylene terephthalate / polypropylene, polyethylene terephthalate / polyethylene, polyvinyl chloride / cellophane, polyimide / polypropylene, polyethylene terephthalate / polyethylene terephthalate, and the like. It is done.
Moreover, the above-mentioned relationship of adhesive force can be satisfy | filled by surface-treating at least any one of a support body and a protective film. The surface treatment of the support may be performed in order to increase the adhesive force with the photosensitive layer. For example, coating of a primer layer, corona discharge treatment, flame treatment, ultraviolet irradiation treatment, high frequency irradiation treatment, glow treatment Examples thereof include discharge irradiation treatment, active plasma irradiation treatment, and laser beam irradiation treatment.

The coefficient of static friction between the support and the protective film is preferably 0.3 to 1.4, more preferably 0.5 to 1.2. When the coefficient of static friction is less than 0.3, slipping is excessive, so that winding deviation may occur when the roll is formed, and when it exceeds 1.4, it is difficult to wind into a good roll. Sometimes.

The method for storing the photosensitive solder resist film is not particularly limited and can be appropriately selected according to the purpose. For example, the photosensitive solder resist film is wound around a cylindrical core and wound into a long roll. Preferably it is stored.
The length of the long photosensitive solder resist film is not particularly limited, and can be appropriately selected from a range of 10 m to 20,000 m, for example. Further, slitting may be performed so that the user can use it easily, and a long body in the range of 100 m to 1,000 m may be rolled. In this case, it is preferable that the support is wound up so as to be the outermost side. Moreover, you may slit the said roll-shaped photosensitive film in a sheet form. From the viewpoint of protecting the end face and preventing edge fusion during storage, it is preferable to install a separator (especially moisture-proof and desiccant-containing) on the end face, and use a low moisture-permeable material for packaging. It is preferable.

The protective film may be surface-treated to adjust the adhesion between the protective film and the photosensitive layer. In the surface treatment, for example, an undercoat layer made of a polymer such as polyorganosiloxane or fluorinated polyolefin such as polyfluoroethylene or polyvinyl alcohol is formed on the surface of the protective film. The undercoat layer is formed by applying the polymer coating solution to the surface of the protective film and then drying at 30 ° C. to 150 ° C. (especially 50 ° C. to 120 ° C.) for 1 minute to 30 minutes. be able to.
In addition to the photosensitive layer, the support, and the protective film, a cushion layer, an oxygen blocking layer (PC layer), a release layer, an adhesive layer, a light absorption layer, a surface protective layer, and the like may be included. .
The cushion layer is a layer that has no tackiness at room temperature and melts and flows when laminated under vacuum and heating conditions.
The PC layer is usually a film having a thickness of about 1.5 μm formed mainly of polyvinyl alcohol.

The photosensitive solder resist film has a small surface tackiness, good laminating property and handleability, and is a photosensitive layered with a photosensitive solder resist composition excellent in insulation, plating resistance and pattern side smoothness. Having a layer. For this reason, it can be widely used for the formation of permanent patterns such as printed wiring boards, color filters, pillar materials, rib materials, spacers, partition walls and other display members, holograms, micromachines, proofs, etc. It can be suitably used for the forming method.
In particular, since the photosensitive solder resist film of the present invention has a uniform thickness, it is more accurately laminated on a substrate when a permanent pattern is formed.

(Permanent pattern and permanent pattern forming method)
The permanent pattern of the present invention is obtained by the permanent pattern forming method of the present invention.
The permanent pattern is preferably at least one of a protective film, an interlayer insulating film, and a solder resist pattern.
When the permanent pattern is a solder resist pattern, the dynamic elastic modulus at 220 ° C. is preferably 20 to 100 MPa, more preferably 25 to 80 MPa, and particularly preferably 30 to 50 MPa. If the dynamic elastic modulus is less than 20 MPa, the heat resistance may be inferior, and if it exceeds 100 MPa, the thermal shock resistance may be inferior and cracks may occur in the cured film.

In the method for forming a permanent pattern of the present invention, as a first aspect, the photosensitive solder resist composition of the present invention is applied to the surface of a substrate, dried to form a photosensitive layer, and then exposed (exposure process). Develop (development process).
Moreover, in the permanent pattern formation method of the present invention, as a second aspect, the photosensitive solder resist film of the present invention is laminated on the surface of the substrate under at least one of heating and pressurization, and then exposed (exposure). Process) and development (development process).
Hereinafter, the details of the permanent pattern of the present invention will be clarified through the description of the method for forming a permanent pattern of the present invention.

<Base material>
The substrate is not particularly limited and may be appropriately selected depending on the intended purpose. For example, a printed wiring board forming substrate such as a copper-clad laminate, a glass plate such as a soda glass plate, or a synthetic resin film , Paper, metal plate and the like.
Among these, a printed wiring board forming substrate on which wiring is already formed is preferable in that high-density mounting of a semiconductor or the like on a multilayer wiring board or a build-up wiring board is possible.

The substrate is a laminate in which a photosensitive layer made of the photosensitive solder resist composition is formed on the substrate as the first aspect, or the photosensitive solder resist film as the second aspect. It is possible to use by forming a laminate in which the photosensitive layers are laminated so as to overlap each other. That is, by exposing the photosensitive layer in the laminated body to be described later, the exposed region can be cured, and a permanent pattern can be formed by development to be described later.

<Laminated body>
There is no restriction | limiting in particular as a formation method of the laminated body of a said 1st aspect, Although it can select suitably according to the objective, The said photosensitive soldering resist composition is apply | coated and dried on the said base material. It is preferable to laminate the formed photosensitive layer.
The method for coating and drying is not particularly limited and may be appropriately selected depending on the intended purpose. For example, the photosensitive solder resist composition solution is spin coater, slit spin coater, roll coater, die coater, curtain. The method of apply | coating using a coater etc. is mentioned.

There is no restriction | limiting in particular as a formation method of the laminated body of the said 2nd aspect, Although it can select suitably according to the objective, At least any one of a heating and pressurization of the said photosensitive film on the said base material is carried out. A method of laminating while performing is preferable. In addition, when the said photosensitive soldering resist film has the said protective film, it is preferable to peel this protective film and to laminate | stack so that the said photosensitive layer may overlap with the said base material.
The heating temperature is not particularly limited and may be appropriately selected depending on the intended purpose. It is preferably 70 ° C to 130 ° C, and more preferably 80 ° C to 110 ° C.
The pressurizing pressure is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 0.01 MPa to 1.0 MPa, more preferably 0.05 MPa to 1.0 MPa.

An apparatus for performing at least one of the heating and pressurization is not particularly limited and may be appropriately selected depending on the intended purpose. For example, a heat press, a heat roll laminator (for example, VP-manufactured by Taisei Laminator Co., Ltd.) II), a vacuum laminator (for example, MVLP500 manufactured by Meiki Seisakusho Co., Ltd.) and the like can be mentioned as suitable devices.

<Exposure process>
The exposure step is a step of performing pattern exposure on the photosensitive layer.

The subject of the exposure is not particularly limited as long as it is a material having a photosensitive layer, and can be appropriately selected according to the purpose. However, the photosensitive solder resist composition or the photosensitive solder resist is formed on a substrate. It is preferable to be performed on the laminate formed with a film.

There is no restriction | limiting in particular as exposure to the said laminated body, According to the objective, it can select suitably, For example, you may expose the said photosensitive layer through the said support body, cushion layer, and PC layer, After peeling the support, the photosensitive layer may be exposed through the cushion layer and the PC layer. After peeling the support and cushion layer, the photosensitive layer is exposed through the PC layer. Alternatively, the photosensitive layer may be exposed after the support, the cushion layer and the PC layer are peeled off.

The exposure is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include digital exposure and analog exposure. Among these, digital exposure is preferable.

The digital exposure is not particularly limited and can be appropriately selected depending on the purpose.For example, a control signal is generated based on pattern formation information to be formed, and light modulated in accordance with the control signal is generated. It is preferable to use.

The digital exposure means is not particularly limited and may be appropriately selected depending on the purpose. For example, light irradiation means for irradiating light, light emitted from the light irradiation means based on pattern information to be formed And a light modulation means for modulating the light intensity.

<< light modulation means >>
The light modulation means is not particularly limited as long as it can modulate light, and can be appropriately selected according to the purpose, but preferably has n pixel portions.
The light modulation means having the n picture elements is not particularly limited and may be appropriately selected according to the purpose, but a spatial light modulation element is preferable.

The spatial light modulation element is not particularly limited and may be appropriately selected depending on the purpose. For example, a spatial light modulation element of a digital micromirror device (DMD) or MEMS (Micro Electro Mechanical Systems) type ( Examples thereof include SLM (Special Light Modulator), an optical element (PLZT element) that modulates transmitted light by an electro-optic effect, and a liquid crystal light shutter (FLC).
Among these, a digital micromirror device (DMD) is preferable.

The light modulation means preferably includes pattern signal generation means for generating a control signal based on pattern information to be formed. In this case, the light modulation unit modulates light according to the control signal generated by the pattern signal generation unit.
There is no restriction | limiting in particular as said control signal, According to the objective, it can select suitably, For example, a digital signal is mentioned.

<Development process>
The developing step is a step of forming a permanent pattern by exposing the photosensitive layer by the exposing step, curing the exposed region of the photosensitive layer, and then developing by removing the uncured region.

The method for removing the uncured region is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a method using a developer.

The developer is not particularly limited and may be appropriately selected depending on the intended purpose. For example, alkali metal or alkaline earth metal hydroxide or carbonate, hydrogen carbonate, aqueous ammonia, quaternary ammonium salt An aqueous solution of Among these, an aqueous sodium carbonate solution is preferable.

The developer may be used in combination with a surfactant, an antifoaming agent, an organic base, an organic solvent or the like for accelerating development.
The organic base is not particularly limited and may be appropriately selected depending on the intended purpose. For example, benzylamine, ethylenediamine, ethanolamine, tetramethylammonium hydroxide, diethylenetriamine, triethylenepentamine, morpholine, triethanol An amine etc. are mentioned.
The organic solvent is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include alcohols, ketones, esters, ethers, amides, and lactones.
The developer may be an aqueous developer obtained by mixing water or an alkaline aqueous solution and an organic solvent, or may be an organic solvent alone.

<Curing process>
The permanent pattern forming method of the present invention preferably further includes a curing treatment step.
The curing treatment step is a step of performing a curing treatment on the photosensitive layer in the formed permanent pattern after the development step is performed.

The curing treatment is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include full exposure processing and full heat treatment.

The method for the entire surface exposure treatment is not particularly limited and may be appropriately selected depending on the purpose. For example, a method for exposing the entire surface of the laminate on which the permanent pattern is formed after the development step. Etc. The entire surface exposure accelerates the curing of the resin in the photosensitive solder resist composition forming the photosensitive layer, and the surface of the permanent pattern is cured.
There is no restriction | limiting in particular as an apparatus which performs the said whole surface exposure, According to the objective, it can select suitably, For example, UV exposure machines, such as a super-high pressure mercury lamp, etc. are mentioned.

The method for the entire surface heat treatment is not particularly limited and may be appropriately selected depending on the purpose. For example, a method for heating the entire surface of the laminate on which the permanent pattern is formed after the development step. Etc. The entire surface heating increases the film strength of the surface of the permanent pattern.
The heating temperature for the entire surface heating is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 120 ° C. to 250 ° C., more preferably 120 ° C. to 200 ° C. When the heating temperature is less than 120 ° C., the film strength may not be improved by heat treatment. When the heating temperature exceeds 250 ° C., the resin in the photosensitive solder resist composition is decomposed and the film quality is weak. May become brittle.
The heating time in the entire surface heating is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 10 minutes to 120 minutes, more preferably 15 minutes to 60 minutes.
There is no restriction | limiting in particular as an apparatus which performs the said whole surface heating, According to the objective, it can select suitably, For example, a dry oven, a hot plate, IR heater etc. are mentioned.

When the substrate is a printed wiring board such as a multilayer wiring board, the permanent pattern of the present invention can be formed on the printed wiring board, and soldering can be performed as follows.
That is, the hardened layer which is the permanent pattern is formed by the developing process, and the metal layer is exposed on the surface of the printed wiring board. Gold plating is performed on the portion of the metal layer exposed on the surface of the printed wiring board, and then soldering is performed. Then, a semiconductor or a component is mounted on the soldered portion. At this time, the permanent pattern by the hardened layer exhibits a function as a protective film or an insulating film (interlayer insulating film), and prevents external impact and conduction between adjacent electrodes.

In the permanent pattern forming method of the present invention, it is preferable to form at least one of a protective film and an interlayer insulating film. When the permanent pattern formed by the permanent pattern forming method is the protective film or the interlayer insulating film, the wiring can be protected from external impact and bending, particularly when the interlayer insulating film is the interlayer insulating film. Is useful for high-density mounting of semiconductors and components on, for example, multilayer wiring boards and build-up wiring boards.

The permanent pattern forming method of the present invention can be widely used for forming various patterns because the pattern can be formed at a high speed, and can be particularly suitably used for forming a wiring pattern.
In addition, the permanent pattern formed by the permanent pattern forming method of the present invention has excellent insulating properties, plating resistance, smoothness of the pattern side surface, etc., and is suitable as a protective film, interlayer insulating film, solder resist pattern, etc. Can be used.

(Printed board)
The printed circuit board of the present invention comprises at least a base material and a permanent pattern formed by the permanent pattern forming method, and further has other configurations appropriately selected as necessary.
There is no restriction | limiting in particular as another structure, According to the objective, it can select suitably, For example, the buildup board | substrate etc. in which the insulating layer was further provided between the base material and the said permanent pattern are mentioned.

Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples.

(Synthesis Example 1)
<Synthesis of Compound T-1>
To a 2,000 mL three-necked flask equipped with a reflux tube and a thermometer, 150 g of tetrahydrofuran, 100 g of N-methylpyrrolidone, and 84.1 g of 3-amino-1,2,4-triazole (manufactured by Merck) were added. . Under stirring, 100 g of tetrahydrofuran and 155.2 g of 2-isocyanatoethyl methacrylate (Karenz MOI, Showa Denko) were added dropwise over 30 minutes. Thereafter, the mixture was stirred at 40 ° C. for 1 hour and then reacted at 70 ° C. for 4 hours. After cooling to room temperature, the reaction solution was poured into 2 L of ion-exchanged water under strong stirring to crystallize the target product. By washing with methanol, filtering and drying, 222 g of compound T-1 having the following structure was obtained.

(Synthesis Example 2)
<Synthesis of Compound T-2>
In a 2,000 mL three-necked flask equipped with a reflux tube and a thermometer, 120 g of tetrahydrofuran, 70 g of N-methylpyrrolidone, 49.5 g of 3,5-diamino-1,2,4-triazole (manufactured by Degussa), and 1.8 g of 2,4-di-tert-butyl-4-methylphenol (PN-01, manufactured by Ouchi Shinsei Chemical Co., Ltd.) was added. Under stirring, 80 g of tetrahydrofuran and 141.1 g of 2-isocyanatoethyl acrylate (Karenz AOI, manufactured by Showa Denko KK) were added dropwise over 2 hours. Then, it was made to react at 40 degreeC for 20 hours. After cooling to room temperature, the reaction solution was poured into 2 L of ion-exchanged water under strong stirring to crystallize the target product. By washing with methanol, filtering and drying, 165.1 g of compound T-2 having the following structure was obtained.

(Synthesis Example 3)
<Synthesis of Compound T-3>
To a 2,000 mL 3-neck flask equipped with a reflux tube and a thermometer, 250 g of N-methylpyrrolidone and 49.5 g of 3,5-diamino-1,2,4-triazole (manufactured by Degussa) were added. Under stirring, 80 g of N-ethylpyrrolidone and 152.2 g of tetrahydrophthalic anhydride (Rikazide TH, manufactured by Shin Nippon Chemical Co., Ltd.) were added dropwise over 2 hours. Thereafter, the mixture was stirred at 40 ° C. for 1 hour and then reacted at 100 ° C. for 12 hours. After cooling to room temperature, the reaction solution was poured into 1.2 L of ion-exchanged water with strong stirring to crystallize the desired product. Washing with isopropanol / hexane (2/8 (mass ratio)), filtration and drying gave 121.1 g of compound T-3 having the following structure.

(Synthesis Example 4)
<Synthesis of Compound T-4>
In a 1,000 mL three-necked flask equipped with a reflux tube and a thermometer, 250 g of t-butyl methyl ketone, 34.5 g of 1,2,4-triazole (manufactured by Junsei Chemical Co., Ltd.), dicyclopentanyl dimethanol dimer Add 145.7 g of acrylate (A-DCP, Shin-Nakamura Chemical Co., Ltd.) and 1.9 g of 2,4-di-t-butyl-4-methylphenol (PN-01, Ouchi Shinsei Chemical Co., Ltd.) It was. After stirring at 40 ° C. for 1 hour, the reaction was carried out at 80 ° C. for 52 hours. After cooling to room temperature, the organic solvent was removed by concentration under reduced pressure to obtain 178 g of compound T-4 having the following structure.

(Synthesis Example 5)
<Synthesis of carboxyl group-containing polymer compound B-4 (acid-modified ethylenically unsaturated group-containing polyurethane resin)>
In a 500 mL three-necked round bottom flask equipped with a condenser and a stirrer, 2.41 g (0.018 mol) of malic acid, 5.23 g of 2,2-bis (hydroxymethyl) propionic acid (DMPA) (0 0.039 mol) and 17.78 g (0.111 mol) of glycerol monomethacrylate were dissolved in 74 mL of cyclohexanone. To this, 30.03 g (0.12 mol) of 4,4-diphenylmethane diisocyanate (MDI), 5.05 g (0.03 mol) of hexamethylene diisocyanate (HMDI), 2,6-di-t-butylhydroxytoluene 0 0.1 g and 0.2 g of Neostan U-600 (manufactured by Nitto Kasei Co., Ltd.) as a catalyst were added and stirred at 75 ° C. for 5 hours. Thereafter, the mixture was diluted with 9.61 mL of methyl alcohol and stirred for 30 minutes to obtain 165 g of a carboxyl group-containing polymer compound B-4 solution (solid content: 45 mass%).
The obtained carboxyl group-containing polymer compound B-4 solution had a solid content acid value of 68 mgKOH / g and a weight average molecular weight (polystyrene standard) measured by gel permeation chromatography (GPC) of 6,500. Yes, the ethylenically unsaturated group equivalent was 1.83 mmol / g.
The acid value was measured according to JIS K0070. However, when the sample did not dissolve, dioxane or tetrahydrofuran was used as a solvent.
The weight average molecular weight is determined by using a high-speed GPC device (HLC-802A manufactured by Toyo Soda Industry Co., Ltd.), a 0.5% by mass THF solution as a sample solution, and a column using one TSKgel HZM-M. A 200 μL sample was injected, eluted with the THF solution, and measured at 25 ° C. with a refractive index detector or a UV detector (detection wavelength 254 nm).
The said ethylenically unsaturated group equivalent was calculated | required by measuring a bromine number based on JISK2605.

(Synthesis Example 6)
<Synthesis of carboxyl group-containing polymer compound B-5 (acid-modified ethylenically unsaturated group-containing polyurethane resin)>
A 500 mL three-necked round bottom flask equipped with a condenser and a stirrer was charged with 32.00 g (0.216 mol) of 2,2-bis (hydroxymethyl) propionic acid (DMBA) and polypropylene glycol (molecular weight 1,000). ) (PPG1000) 9.00 g (0.009 mol) was dissolved in 118 mL of propylene glycol monomethyl ether monoacetate. To this, 37.54 g (0.15 mol) of 4,4-diphenylmethane diisocyanate (MDI), 0.1 g of 2,6-di-t-butylhydroxytoluene, and Neostan U-600 (manufactured by Nitto Kasei Co., Ltd.) After adding 2 g and stirring at 75 ° C. for 5 hours, 9.61 g of methyl alcohol was added. Thereafter, 17.91 g (0.126) of glycidyl methacrylate (GMA) as an epoxy compound containing an ethylenically unsaturated group and 5,000 ppm of triphenylphosphine as a catalyst were further added and stirred at 110 ° C. for 5 hours. After cooling to room temperature, 214 g of a carboxyl group-containing polymer compound B-5 solution was obtained.
The obtained carboxyl group-containing polymer compound B-5 solution had a solid content acid value of 75 mgKOH / g and a weight average molecular weight (polystyrene standard) measured by gel permeation chromatography (GPC) of 12,000. Yes, the ethylenically unsaturated group equivalent was 1.3 mmol / g.

Example 1
<Preparation of photosensitive composition coating solution 1>
The following components were mixed to prepare photosensitive composition coating solution 1 (photosensitive solder resist composition coating solution).
―――――――――――――――――――――――――――――――――――――――
ZFR-1776 (Nippon Kayaku Co., Ltd., acid-modified ethylenically unsaturated group-containing epoxy resin: 65% by mass methoxypropyl acetate solution) (B-1) 32.3 parts by mass Compound T-1 0.8 parts by mass Coloring pigment: HELIOGEN BLUE D7086 (manufactured by BASF)
0.021 parts by mass Coloring pigment: Pariotol Yellow D0960 (BASF)
0.006 parts by mass Dispersant: Solsperse 24000GR (manufactured by Loop Resor) 0.22 parts by mass Polymerizable compound: DCP-A (manufactured by Kyoeisha Chemical Co., Ltd.) 5.3 parts by mass Initiator: Irgacure 907 (BASF) 0.6 parts by mass, sensitizer: DETX-S (manufactured by Nippon Kayaku Co., Ltd.) 0.005 parts by mass, reaction aid: EAB-F (manufactured by Hodogaya Chemical Co., Ltd.) 0.019 parts by mass, curing agent : Melamine (manufactured by Wako Pure Chemical Industries, Ltd.) 0.16 parts by mass Thermal crosslinking agent: Epototo YDF-170 2.9 parts by mass (manufactured by Nippon Steel Chemical Co., Ltd., compound having an oxirane group (bisphenol F type epoxy resin))
Filler: SO-C2 (manufactured by Admatechs) 8.0 parts by mass Ion trap agent: IXE-6107 (manufactured by Toagosei Co., Ltd.) 0.82 parts by mass Application aid: Megafac F-780F 0.2 mass Parts (manufactured by DIC: 30 mass% methyl ethyl ketone solution)
-Elastomer: Esper 1612 2.7 parts by mass-Cyclohexanone (solvent) 38.7 parts by mass

<Preparation of photosensitive solder resist film 1>
Using a polyethylene terephthalate film (PET) having a thickness of 25 μm as a support, the photosensitive composition coating solution 1 was applied onto the support with a bar coater so that the thickness of the photosensitive layer after drying was about 30 μm. The photosensitive solder resist film 1 was produced by drying in a hot air circulating dryer at 80 ° C. for 30 minutes.

<Formation of permanent pattern>
-Preparation of laminate-
As a base material, a copper-clad laminate (with no through holes and a printed wiring board with a copper thickness of 12 μm) on which a surface was chemically polished was used. The copper-clad laminate is laminated using a vacuum laminator (MVLP500, manufactured by Meiki Seisakusho Co., Ltd.) so that the photosensitive layer of the photosensitive solder resist film 1 is in contact with the copper-clad laminate. A laminate in which a tension laminate, the photosensitive layer, and the polyethylene terephthalate film (support) were laminated in this order was prepared.
The pressure bonding conditions were a pressure bonding temperature of 90 ° C., a pressure bonding pressure of 0.4 MPa, and a laminating speed of 1 m / min.
About the obtained laminated body, the resist pattern was formed with the evaluation method shown below.

-Exposure process-
A predetermined pattern can be obtained with a laser beam of 405 nm from the polyethylene terephthalate film (support) side using the pattern forming apparatus by blue-violet laser exposure having a predetermined pattern with respect to the photosensitive layer in the prepared laminate. In this way, an energy amount of 40 mJ / cm ² was irradiated for exposure, and a partial region of the photosensitive layer was cured.

-Development process-
After standing at room temperature for 10 minutes, the polyethylene terephthalate film (support) is peeled off from the laminate, and a 1% by mass aqueous sodium carbonate solution is used as an alkaline developer on the entire surface of the photosensitive layer on the copper clad laminate. Spray development was performed at 30 ° C. for 60 seconds at a pressure of 0.18 MPa (1.8 kgf / cm ² ) to dissolve and remove unexposed areas. Thereafter, it was washed with water and dried to form a permanent pattern.

-Curing process-
The entire surface of the laminate on which the permanent pattern was formed was subjected to heat treatment at 150 ° C. for 1 hour to cure the surface of the permanent pattern, increase the film strength, and prepare a test plate.

<Evaluation method>
The smoothness, insulation, thermal shock resistance (crack resistance), and plating resistance of the side surface of the pattern were evaluated by the following evaluation methods. The results are shown in Table 1.

-Smoothness of pattern side surface-
The side surface of the permanent pattern formed in the developing step was photographed with a scanning electron microscope (SEM), and the smoothness of the pattern side surface was evaluated according to the following evaluation criteria.
[Evaluation criteria]
○: The pattern side surface is smooth and the pattern shape is excellent.
○ Δ: Slight irregularities are observed on the side surface of the pattern, but the pattern shape is good.
Δ: There are irregularities on the side surface of the pattern, and the pattern shape is slightly inferior.
X: Aggregates are observed on the side of the pattern, and the pattern shape is inferior.

-Insulation-
The copper foil of the printed circuit board obtained by laminating a copper foil having a thickness of 12 μm on a glass epoxy substrate is etched, the line width / space width is 50 μm / 50 μm, the lines are not in contact with each other, and the same facing each other A comb electrode on the surface was obtained. The photosensitive solder resist film 1 was laminated on the comb-shaped electrode of the substrate in the same manner as described in the method for preparing the laminate, and the exposure was performed at the optimum exposure amount (300 mJ / cm ² to 1 J / cm ² ). . Next, after standing at room temperature for 1 hour, spray development was performed for 60 seconds with a 1% by mass aqueous sodium carbonate solution at 30 ° C., followed by heating (drying) at 80 ° C. for 10 minutes. Subsequently, the photosensitive layer was irradiated with ultraviolet rays with an energy amount of 1 J / cm ² using an ultraviolet irradiation device manufactured by Oak Manufacturing Co., Ltd. Further, the photosensitive layer was heat-treated at 150 ° C. for 60 minutes to obtain an evaluation substrate on which a 25 μm thick solder resist was formed.
After connecting the polytetrafluoroethylene shield wires to the comb electrodes with Sn / Pb solder so that a voltage is applied between the comb electrodes of the evaluation laminate after heating, 5 V is applied to the evaluation laminate. With the voltage applied, the laminate for evaluation was allowed to stand for 200 hours in a super accelerated high temperature high humidity life test (HAST) bath at 130 ° C. and 85% RH. The degree of migration of the solder resist in the subsequent evaluation laminate was observed with a 100-fold metal microscope and evaluated according to the following evaluation criteria.
[Evaluation criteria]
◎: The occurrence of migration is not confirmed and the insulation is excellent. ○: The occurrence of migration is slightly confirmed on copper, but the insulation is good. ○ △: Migration is slightly confirmed in SR (solder resist). However, the insulation is slightly good. △: Migration is confirmed and the insulation is slightly inferior. X: The electrodes are short-circuited and the insulation is inferior.

-Crack resistance-
A photosensitive solder resist film 1 is laminated on a printed circuit board obtained by laminating a copper foil having a thickness of 12 μm on a glass epoxy substrate in the same manner as described in the method for preparing the laminate, and through a 2 mm square photomask, Oak Manufacturing Co., Ltd. Using an HMW-201GX type exposure machine manufactured by the company, exposure was performed with an optimum exposure amount (300 mJ / cm ² to 1 J / cm ² ) that can form a 2 mm square pattern. Next, after standing at room temperature for 1 hour, spray development was performed for 60 seconds with a 1% by mass aqueous sodium carbonate solution at 30 ° C., followed by heating (drying) at 80 ° C. for 10 minutes. Subsequently, the photosensitive layer was irradiated with ultraviolet rays with an energy amount of 1 J / cm ² using an ultraviolet irradiation device manufactured by Oak Manufacturing. Further, the photosensitive layer was subjected to a heat treatment at 150 ° C. for 60 minutes to obtain a substrate for evaluation on which a 25 μm thick solder resist having a rectangular opening of 2 mm square was formed.
The obtained substrate was exposed to an atmosphere of −65 ° C. for 15 minutes, then exposed to an atmosphere of 150 ° C. for 15 minutes, and then exposed to the air of −65 ° C. again for 1,000 times. The crack and peeling degree on the solder resist of the evaluation substrate through the thermal cycle were observed with an optical microscope and evaluated according to the following evaluation criteria.
[Evaluation criteria]
◎: Solder resist is free from cracks, peeling and distortion, and excellent toughness ○: Solder resist is slightly distorted, but toughness is good ○ △: Solder resist is slightly cracked, but tough △: Slightly cracked and peeled in solder resist, slightly inferior in toughness ×: Clearly cracked and peeled in solder resist, inferior in toughness

-Plating resistance-
After degreasing the permanent pattern and roughening the surface, palladium sulfate was added to perform catalyst addition. Next, after immersing the permanent pattern in a nickel sulfate / dilute sulfuric acid solution at 70 ° C. for 40 minutes to perform plating, the cured film in the permanent pattern was visually turned up and peeled off, based on the following criteria: The plating resistance was evaluated.
[Evaluation criteria]
◎: Turned over to the cured film, no peeling, extremely excellent plating resistance ○: Discolored part of the cured film, but no problem in practical use, excellent in plating resistance △: Turned over the cured film Inferior in plating resistance ×: Floating (peeling) is observed in the cured film, and inferior in plating resistance

(Example 2)
In Example 1, ZFR-1176 (produced by Nippon Kayaku Co., Ltd., acid-modified ethylenically unsaturated group-containing epoxy resin) (B-1) was added to CyclerP 200HM (produced by Daicel Chemical Industries, Ltd., containing ethylenically unsaturated groups and carboxyl groups). A photosensitive composition coating solution and a photosensitive solder resist film were prepared in the same manner as in Example 1, except that the acrylic resin was changed to (B-2) (the content in the solid content was the same). .
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Example 3)
In Example 1, ZFR-1176 (Nippon Kayaku Co., Ltd., acid-modified ethylenically unsaturated group-containing epoxy resin) (B-1) was added to UXE-3024 (Nippon Kayaku Co., Ltd., acid-modified ethylenically unsaturated group-containing product). A photosensitive composition coating solution and a photosensitive solder resist film were prepared in the same manner as in Example 1 except that the polyurethane resin (B-3) was replaced (the content in the solid content was the same).
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

Example 4
In Example 1, a carboxyl group-containing polymer compound (acid-modified ethylenically unsaturated polymer) obtained by synthesizing ZFR-1176 (manufactured by Nippon Kayaku Co., Ltd., acid-modified ethylenically unsaturated group-containing epoxy resin) (B-1) in Synthesis Example 5 was used. A photosensitive composition coating solution and a photosensitive solder resist film were prepared in the same manner as in Example 1 except that the saturated group-containing polyurethane resin (B-4) was replaced (the content in the solid content was the same). Produced.
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Example 5)
In Example 4, a photosensitive composition coating solution and a photosensitive solder resist film were prepared in the same manner as in Example 4 except that the compound T-1 was replaced with the compound T-2.
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Example 6)
In Example 4, a photosensitive composition coating solution and a photosensitive solder resist film were produced in the same manner as in Example 4 except that the compound T-1 was replaced with the compound T-3.
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Example 7)
In Example 4, a photosensitive composition coating solution and a photosensitive solder resist film were prepared in the same manner as in Example 4 except that Compound T-1 was replaced with Compound T-4.
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Example 8)
In Example 5, except that the blending amount of Compound T-2 was changed from 1.7% by mass to 3.0% by mass with respect to the solid content of the photosensitive composition coating solution, A photosensitive composition coating solution and a photosensitive solder resist film were prepared.
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

Example 9
In Example 5, Epototo YDF-170 (manufactured by Nippon Steel Chemical Co., Ltd., a compound having an oxirane group (bisphenol F type epoxy resin)) as an thermal crosslinking agent was used as ETERNACOLL OXBP (manufactured by Ube Industries, Ltd., a compound having an oxetanyl group) A photosensitive composition coating solution and a photosensitive solder resist film were produced in the same manner as in Example 5 except that the above was replaced.
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Example 10)
In Example 5, Epototo YDF-170 (manufactured by Nippon Steel Chemical Co., Ltd., a compound having an oxirane group (bisphenol F type epoxy resin)) as a thermal crosslinking agent was added to Sumidur BL3175 (manufactured by Sumika Bayer Urethane Co., Ltd., blocked isocyanate group). A photosensitive composition coating solution and a photosensitive solder resist film were prepared in the same manner as in Example 5 except that the compound was changed to (Compound with a).
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Example 11)
In Example 5, Epototo YDF-170 (manufactured by Nippon Steel Chemical Co., Ltd., a compound having an oxirane group (bisphenol F type epoxy resin)) as a thermal crosslinking agent was converted into YSLV-120TE (manufactured by Nippon Steel Chemical Co., Ltd., oxirane group A photosensitive composition coating solution and a photosensitive solder resist film were produced in the same manner as in Example 5 except that the compound was changed to (Compounds).
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Example 12)
In Example 1, the carboxyl group-containing polymer compound (acid-modified ethylenically unsaturated polymer) synthesized in Synthesis Example 6 was prepared by synthesizing ZFR-1176 (manufactured by Nippon Kayaku Co., Ltd., acid-modified ethylenically unsaturated group-containing epoxy resin) (B-1). A photosensitive composition coating solution and a photosensitive solder resist film were prepared in the same manner as in Example 1 except that the saturated group-containing polyurethane resin (B-5) was replaced (the content in the solid content was the same). Produced.
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 1)
A photosensitive composition coating solution and a photosensitive solder resist film were prepared in the same manner as in Example 1 except that the T-1 compound and the thermal crosslinking agent were not blended in Example 1.
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 2)
In Example 1, a photosensitive composition coating liquid and a photosensitive solder resist film were prepared in the same manner as in Example 1 except that the T-1 compound was not blended.
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 3)
A photosensitive composition coating solution and a photosensitive solder resist film were prepared in the same manner as in Example 1 except that the T-1 compound was replaced with IXE6107 (inorganic ion exchanger manufactured by Toagosei Co., Ltd.) in Example 1. Produced.
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 4)
In Example 1, except that the T-1 compound was replaced with the compound TZ (1,2,4-triazole) having the following structure, the photosensitive composition coating liquid and the photosensitive composition were the same as in Example 1. A solder resist film was prepared.
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 5)
In Example 1, a photosensitive composition coating liquid and a photosensitive solder resist film were prepared in the same manner as in Example 1 except that no thermal crosslinking agent was added.
The obtained photosensitive composition coating liquid and photosensitive solder resist film were evaluated in the same manner as in Example 1. The results are shown in Table 1.

However, in Table 1, the content (mass%) of the triazole compound is the content with respect to the solid content of the photosensitive composition coating solution.

Examples 1 to 12 were excellent in insulation, plating resistance, smoothness of the pattern side surface, and crack resistance. When compound T-2 was used as the triazole compound, the insulation was very excellent. Further, when B-4, that is, an acid-modified ethylenically unsaturated group-containing polyurethane resin was used as the carboxyl group-containing polymer compound, the crack resistance was excellent. In addition, when a compound having an oxirane group was used as the thermal crosslinking agent, the smoothness of the pattern side surface was excellent.

In Comparative Example 1, all of insulating properties, plating resistance, pattern side surface smoothness, and crack resistance were much inferior to those of the Examples.
In the comparative example 2 which does not contain a triazole compound, compared with the Example, insulation, the smoothness of the pattern side surface, and crack resistance were inferior.
In Comparative Example 3 using an inorganic ion trapping agent, although the plating resistance was equal to that of the Example, the smoothness of the pattern side surface was inferior and the crack resistance was very inferior.
In Comparative Example 4 using 1,2,4-triazole as the triazole compound, the smoothness of the pattern side surface and the plating resistance were inferior to those of the Examples.
In the comparative example 5 which does not contain a thermal crosslinking agent, it resulted in inferior insulation, crack resistance, and plating resistance.

The improvement in the smoothness of the pattern side surface in Examples 1 to 12 is an effect that is not obtained in Comparative Examples 1 to 4, and an effect that is not known in the prior art using a triazole compound in the photosensitive composition. It is.

As an aspect of this invention, the following aspects are mentioned, for example.
<1> containing a compound having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring, a polymerizable compound, a photopolymerization initiator, and a thermal crosslinking agent. It is the photosensitive composition characterized.
<2> The photosensitive composition according to <1>, further including a carboxyl group-containing polymer compound.
<3> The photosensitive composition according to <2>, wherein the carboxyl group-containing polymer compound is an acid-modified ethylenically unsaturated group-containing polyurethane resin.
<4> The thermal crosslinking agent according to any one of <1> to <3>, wherein the thermal crosslinking agent is a compound having at least one functional group selected from a cyclic ether group, a blocked isocyanate group, an oxazolyl group, and an ethylene carbonate group. Of the photosensitive composition.
<5> The above <1> to <4, wherein the compound having a triazole ring and at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent is a compound represented by the following general formula (I): > The photosensitive composition according to any one of the above.

However, in said general formula (I), X represents a triazole ring. Y represents an organic group having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent. n represents an integer of 1 to 3. When n is 2 to 3, Y may be the same or different.
<6> The photosensitive composition according to <5>, wherein Y in the general formula (I) is a group represented by the following general formula (II).

In the general formula (II), Y ₁ represents an m + 1 valent organic group having 2 to 25 carbon atoms. Z ₁ represents any of a carboxyl group, an acryloyloxy group, and a methacryloyloxy group. m represents an integer of 1 to 2. When m is 2, Z ₁ may be the same or different.
<7> The photosensitive composition according to any one of <1> to <6>, wherein the thermal crosslinking agent is a compound having an oxirane group.
<8> A photosensitive solder resist composition comprising the photosensitive composition according to any one of <1> to <7>.
<9> A photosensitive solder resist film comprising: a support; and a photosensitive layer obtained by laminating the photosensitive solder resist composition according to <8> on the support.
<10> The photosensitive solder resist composition according to <8> is applied to the surface of a substrate, dried to form a laminate by forming a photosensitive layer, and then exposed and developed. This is a permanent pattern forming method.
<11> A permanent pattern formed by the method for forming a permanent pattern according to <10>.
<12> A printed circuit board wherein a permanent pattern is formed by the method for forming a permanent pattern according to <10>.

Since the photosensitive composition of this invention can obtain the high performance cured film excellent in insulation, plating resistance, and the smoothness of a pattern side surface, it can be used suitably for a soldering resist.
The photosensitive solder resist film of the present invention is a protective film, interlayer insulating film, various pattern formation such as a permanent pattern such as a solder resist pattern, manufacture of liquid crystal structural members such as color filters, pillar materials, rib materials, spacers, partition walls, It can be suitably used for the production of holograms, micromachines, proofs, etc., and can be particularly suitably used for forming a permanent pattern on a printed circuit board.
Since the pattern forming method of the present invention uses the photosensitive composition, it is for forming various patterns such as a protective film, an interlayer insulating film, a permanent pattern such as a solder resist pattern, a color filter, a pillar material, a rib material, a spacer, a partition wall. It can be suitably used for the production of liquid crystal structural members such as holograms, micromachines, and proofs, and can be suitably used for the formation of permanent patterns on printed boards.

Claims

It contains at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring, a polymerizable compound, a photopolymerization initiator, and a thermal crosslinking agent. Photosensitive composition.
The photosensitive composition according to claim 1, further comprising a carboxyl group-containing polymer compound.
The photosensitive composition according to claim 2, wherein the carboxyl group-containing polymer compound is an acid-modified ethylenically unsaturated group-containing polyurethane resin.
The photosensitive composition according to any one of claims 1 to 3, wherein the thermal crosslinking agent is a compound having at least one functional group selected from a cyclic ether group, a blocked isocyanate group, an oxazolyl group, and an ethylene carbonate group.
The compound having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent and a triazole ring is a compound represented by the following general formula (I). Photosensitive composition.

However, in said general formula (I), X represents a triazole ring. Y represents an organic group having at least one of a group capable of reacting with a radical and a group capable of reacting with a thermal crosslinking agent. n represents an integer of 1 to 3. When n is 2 to 3, Y may be the same or different.
6. The photosensitive composition according to claim 5, wherein Y in the general formula (I) is a group represented by the following general formula (II).

In the general formula (II), Y 1 represents an m + 1 valent organic group having 2 to 25 carbon atoms. Z 1 represents any of a carboxyl group, an acryloyloxy group, and a methacryloyloxy group. m represents an integer of 1 to 2. When m is 2, Z 1 may be the same or different.
The photosensitive composition according to claim 1, wherein the thermal crosslinking agent is a compound having an oxirane group.
A photosensitive solder resist composition comprising the photosensitive composition according to claim 1.
A photosensitive solder resist film comprising: a support; and a photosensitive layer obtained by laminating the photosensitive solder resist composition according to claim 8 on the support.
A photosensitive solder resist composition according to claim 8 is applied to the surface of a substrate, dried to form a laminate by laminating a photosensitive layer, and then exposed and developed to form a permanent pattern. Method.
A permanent pattern formed by the method for forming a permanent pattern according to claim 10.
A printed circuit board, wherein a permanent pattern is formed by the method for forming a permanent pattern according to claim 10.