JP2003057840A - Method for manufacturing photo-polymerizable resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a photo-polymerizable resin composition for fabricating an alkali developing type printed circuit board especially excellent in solubility, with improved productivity and useful. SOLUTION: The photo-polymerizable resin composition is manufactured by using a prepared liquid which contains a binder resin with 100-600 acid equivalent weight of carboxylic group content and 20,000-500,000 weight-average molecular weight (a), a photo-polymerizable unsaturated compound (b), a photo- polymerization initiator (c) and a basic dye (d) and in which the respective ingredients are uniformly dissolved in a mixed solvent. The mixed solvent is a mixture of alcoholic ingredients and other ingredients. The ratio of the alcoholic ingredients is 2-50 wt.%, further the concentration of the composition in the prepared liquid is 30-80 wt.% and further the viscosity of the prepared liquid is 500-4,000 mPa.sec at 25 deg.C.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for producing an alkali-developable photopolymerizable resin composition used for producing a printed circuit board.

[0002]

2. Description of the Related Art A method for producing a photopolymerizable resin composition for producing a printed circuit is a resin represented by a binder such as a binder resin, a photopolymerizable unsaturated compound, a photopolymerization initiator and a dye. It is common to uniformly stir and dissolve the solvent in a solvent containing a solvent, an ester represented by ethyl acetate, an ether represented by tetrahydrofuran, etc. as a main component. It is also possible to obtain a photopolymerizable resin composition laminate by uniformly applying the obtained preparation liquid onto a polyester film or the like which is a support layer using a die coater or the like, and drying the solvent in the drying step. . Further, by laminating with a polyethylene film or the like as a protective layer, a photopolymerizable resin composition laminate having a three-layer structure can be obtained. These laminated bodies are generally called a dry film photoresist (hereinafter abbreviated as DFR).

[0003]

In the conventional production method using a ketone or the like represented by methyl ethyl ketone as a main component of a solvent, the solubility of a binder resin and a photopolymerizable unsaturated compound and the addition of a dye or the like are used. The solubility of the agent was insufficient, and the filter was often clogged when the formulation solution was filtered. Therefore, an object of the present invention is to provide a method for producing a useful photopolymerizable resin composition for producing a printed circuit board, which has particularly good solubility and improves productivity.

[0004]

[Means for Solving the Problems] As a result of intensive studies to solve the above problems, when preparing the above-mentioned preparation liquid,
When a photopolymerizable resin composition was produced using a mixed solvent containing an alcohol component, it was found that the solubility of an additive component such as a dye was improved, and the productivity was improved, and the present invention was completed. It was That is, the present invention provides the following.

(1) A method for producing a photopolymerizable resin composition, which comprises (a) a carboxyl group content of 100 to 600 in acid equivalent and a weight average molecular weight of 2
Formulation in which a binder resin of 10,000 to 500,000, (b) a photopolymerizable unsaturated compound, (c) a photopolymerization initiator, and (d) a basic dye are uniformly dissolved in a mixed solvent. Produced from a liquid, the mixed solvent is a mixture of an alcohol component and other components, the ratio of the alcohol component is 2 to 50 wt%, and the concentration of the composition in the preparation liquid is 30 to 80 wt%. And a method for producing a photopolymerizable resin composition, characterized in that the prepared solution has a viscosity of 500 to 4000 mPa · sec at 25 ° C.

(2) Components other than alcohol in the mixed solvent are (i) ketones represented by methyl ethyl ketone, (ii) esters represented by ethyl acetate,
(Iii) one or more kinds selected from the group of ethers represented by tetrahydrofuran,
(1) A method for producing the photopolymerizable resin composition as described above.

(3) The method for producing a photopolymerizable resin composition according to (1), wherein an alcohol having 3 or less carbon atoms is used as the alcohol component in the mixed solvent.

(4) As the (d) basic dye, a compound represented by the following general formula (I) and / or (II) is used, wherein the photopolymerizable resin composition according to (1) is used. Manufacturing method.

[0009]

[Chemical 3] (In the formula, R _{1 s} may be the same or different and represent CH ₃ or C ₂ H _5. )

[0010]

[Chemical 4] (In the formula, R ₂ may be the same or different and represents CH ₃ or C ₂ H _5. )

Further, the above-mentioned prepared solution is coated on a support layer,
Also provided is a method of producing a DFR by drying.

Further, a protective layer is laminated on the surface of the photopolymerizable resin composition layer laminated on the supporting layer to form a DF having a three-layer structure.
Also provided is a method of making R.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below. The alcohol used in the present invention preferably has 3 or less carbon atoms, such as methanol, ethanol,
Isopropyl alcohol, etc. Considering solubility, boiling point, handling safety, etc., ethanol is particularly preferable among the above alcohols, and ethanol may be denatured with methanol or the like. Alcohol which is a polar solvent and a mixed solution using a mixed solvent of ketones typified by methyl ethyl ketone are compared with a mixed solution using only ketones typified by methyl ethyl ketone.
The solubility of dyes and the like is improved.

Further, when alcohol, which is a polar solvent, is used, the viscosity of the preparation liquid can be lowered, and when the viscosity is adjusted to a predetermined minimum viscosity required for coating, the concentration of the composition in the preparation liquid is changed to methyl ethyl ketone. Compared with the case of using a typical preparation solution using only ketones as a solvent, it becomes possible to increase the temperature. Coating and drying are performed using this prepared liquid to form a film. By using the mixed solvent with alcohol, the ability to remove the solvent in the drying step is improved, so that the coating speed is increased and the productivity can be improved.

Further, by using a mixed solvent with alcohol, the solubility is improved and the clogging of the filter (opening 3-20 μm) at the time of filtering the preparation liquid can be reduced.

The binder resin (a) is obtained by solution polymerization or suspension polymerization, but the binder resin obtained by solution polymerization may contain alcohol as a solvent. Since the solvent in that case also acts as the solvent of the preparation liquid, it should be added to the calculation as the solvent when the concentration and viscosity of the composition in the preparation liquid are obtained.

From the viewpoint of solubility, the alcohol ratio in the mixed solvent of the preparation liquid containing the components of the photopolymerizable resin composition is 2 w.
It is necessary to be t% or more, and from the viewpoint of sensitivity as a resist, it is necessary to be 50 wt% or less.
A preferable alcohol ratio is 2 to 25 wt%, and more preferably 2 to 10 wt%.

Further, the concentration of the composition in the prepared liquid prepared by dissolving the components of the photopolymerizable resin composition in the mixed solvent is 30 to 80 w.
Must be t%. In order to obtain the effect of improving the coating speed, it is necessary to control the amount of the solvent to be dried and evaporated, and from that viewpoint, the concentration of the composition in the preparation liquid is 30
It is necessary that the content be wt% or more. From the viewpoint of uniformity of the preparation liquid, the concentration of the composition in the preparation liquid is 80 wt%.
It must be: The more preferable concentration of the composition in the preparation liquid is 40 to 60 wt%.

The viscosity of the prepared liquid at 25 ° C. is 500 to
It needs to be 4000 mPa · sec. From the viewpoint of coatability at the time of coating (affinity between the prepared liquid and the support layer), the viscosity of the prepared liquid at 25 ° C. needs to be 500 mPa · sec or more. In addition, from the viewpoint of uniformity of the mixed solution, 4
It is necessary to be 000 mPa · sec or less. A more preferable range is 1000 to 3000 mPa · sec.
Is.

The amount of the binder resin (a) contained in the photopolymerizable resin composition of the present invention is in the range of 20 to 90 wt%, preferably 30 to 70 wt%. The amount of binder resin (a) is less than 20 wt% or 90 wt%
If it exceeds, the cured image formed by exposure does not have sufficient resist characteristics, for example, sufficient resistance in tenting, etching and various plating steps. The binder resin used in the present invention is obtained by copolymerizing one or more of the following two types of monomers. The first monomer is a carboxylic acid or acid anhydride having one polymerizable unsaturated group in the molecule. For example, (meth) acrylic acid, fumaric acid, cinnamic acid, crotonic acid, itaconic acid, maleic anhydride, maleic acid half ester and the like. The second monomer is non-acidic,
It has one polymerizable unsaturated group in the molecule and is selected so as to retain various properties such as developability of the photopolymerizable resin composition layer, resistance in etching and plating steps, and flexibility of the cured film. . For example, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-
There are alkyl (meth) acrylates such as ethylhexyl (meth) acrylate. Also, a vinyl compound having a phenyl group (for example, styrene) can be used.

The amount of the carboxyl group contained in the binder resin (a) needs to be 100 to 600, preferably 300 to 400 in terms of acid equivalent. Here, the acid equivalent means the weight of the polymer having 1 equivalent of a carboxyl group therein. The acid equivalent is measured by potentiometric titration. The carboxyl group in the binder resin is DF
It is necessary to give R developability and releasability with respect to an alkaline aqueous solution. The acid equivalent needs to be 100 or more from the viewpoint of development resistance, resolution and adhesion, and 600 or less from the viewpoint of developability and releasability.

The weight average molecular weight of the binder resin must be 20,000 to 500,000. When it exceeds 500,000, the developability deteriorates, and when it is less than 20,000, the tenting film strength and the edge fuse property deteriorate. More preferably, it is 30,000 to 300,000. The molecular weight is obtained as a weight average molecular weight (in terms of polystyrene) by gel permeation chromatography (GPC).

The amount of the photopolymerizable unsaturated compound (b) contained in the photopolymerizable resin composition of the present invention is 3 to 70 wt%.
Range, and preferably 5 to 60 wt%. 3w
If it is less than t%, the sensitivity is not sufficient, and if it exceeds 70% by weight, the protrusion of the photopolymerizable resin composition layer during storage becomes remarkable, which is not preferable. Photopolymerizable unsaturated compound (b) constituting the photopolymerizable resin composition produced by the present invention
Examples include 1,6-hexanediol di (meth) acrylate, 1,4-cyclohexanediol di (meth) acrylate, polypropylene glycol di (meth) acrylate such as tetrapropylene glycol diacrylate, and nonaethylene glycol diacrylate. Polyoxyalkylene glycol di (meth) acrylate such as polyethylene glycol di (meth) acrylate, polyoxyethylene polyoxypropylene glycol di (meth) acrylate, 2-di (p-hydroxyphenyl) propane di (meth) acrylate, glycerol tri ( (Meth) acrylate, trimethylolpropane tri (meth) acrylate, polyoxypropyl trimethylolpropane tri (meth) acrylate, polyoxyethyl trimethylol There are lopantriacrylate, dipentaerythritol penta (meth) acrylate, trimethylolpropane triglycidyl ether tri (meth) acrylate, bisphenol A diglycidyl ether di (meth) acrylate, and polyfunctional (meth) acrylate containing a urethane group. .

Examples of the polyoxyalkylene glycol di (meth) acrylate include a dimethacrylate of glycol in which 3 mol of ethylene oxide is added to both ends of polypropylene glycol to which 3 mol of ethylene oxide is added to polypropylene glycol to which 8 mol of propylene oxide is added.

Examples of the polyfunctional (meth) acrylate containing a urethane group include urethane products of hexamethylene diisocyanate and oligopropylene glycol monomethacrylate (Blenmer PP1000 manufactured by NOF CORPORATION).

Further, β-hydroxypropyl-β'-
Monofunctional monomers such as (acryloyloxy) propyl phthalate, phenoxy polyethylene glycol acrylate and nonylphenoxy polyethylene glycol acrylate can be mentioned.

The amount of the photopolymerization initiator (c) contained in the photopolymerizable resin composition of the present invention is 0.01 to 30 wt%, preferably 0.05 to 10 wt%. When the photopolymerization initiator exceeds 30 wt%, the active absorption rate of the photopolymerizable composition becomes high, and when used as a photopolymerizable resin laminate, the curing of the bottom portion of the photopolymerizable layer due to polymerization becomes insufficient. . Further, if the amount of the photopolymerization initiator is less than 0.01 wt%, sufficient sensitivity cannot be obtained. Examples of the photopolymerization initiator (c) that constitutes the photopolymerizable resin composition produced in the present invention include known compounds that initiate polymerization activated by various actinic rays such as ultraviolet rays. Examples thereof include quinones such as 2-ethylanthraquinone and 2-tert-butylanthraquinone, aromatic ketones such as benzophenone, benzoin ethers such as benzoin, benzoin methyl ether and benzoin ethyl ether, benzyl dimethyl ketal, benzyl diethyl ketal and the like. . There are also combinations of thioxanthones such as thioxanthone, 2,4-diethylthioxanthone, and 2-chlorothioxanthone, and tertiary amine compounds such as dimethylaminobenzoic acid alkyl ester compounds. Further, for example, acridines such as 9-phenylacridine, 1
-Oxime esters such as phenyl-1,2-propanedione-2-o-benzoyl oxime, 1-phenyl-1,2-propanedione-2- (o-ethoxycarbonyl) oxime, 2,4,5-trially -Ruimidazole dimers include, for example, 2- (o-chlorophenyl) -4,5
-Diphenylimidazole dimer, 2- (o-chlorophenyl) -4,5-bis- (m-methoxyphenyl) imidazole dimer, 2- (p-methoxyphenyl)-
There are 4,5-diphenylimidazole dimers and the like. Two
A system in which a 4,5-triarylimidazole dimer and p-aminophenyl ketone are used in combination is preferable, and examples of p-aminophenyl ketone include p-aminobenzophenone, p-butylaminophenone, p-dimethylaminoacetophenone and p-aminoaminophenone. -Dimethylaminobenzophenone,
4,4'-bis (ethylamino) benzophenone, 4,
4'-bis (dimethylamino) benzophenone [Michler's ketone], 4,4'-bis (diethylamino) benzophenone, 4,4'-bis (dibutylamino) benzophenone and the like can be mentioned.

In order to improve the thermal stability and storage stability of the photopolymerizable resin composition produced by the present invention, it is preferable that the photopolymerizable composition contains a radical polymerization inhibitor. . Examples of such radical polymerization inhibitors include p-methoxyphenol, hydroquinone, pyrogallol, naphthylamine, tert-butylcatechol, cuprous chloride, 2,6-di-tert-butyl-p-cresol, and 2,2. '-Methylenebis (4-ethyl-6-tert-butylphenol), 2,2'-
Examples thereof include methylenebis (4-methyl-6-tert-butylphenol), nitrosophenylhydroxyamine aluminum salt, diphenylnitrosamine and the like.

The amount of basic dye (d) contained in the photopolymerizable resin composition of the present invention is 0.005 to 10 wt%, preferably 0.01 to 5 wt%. If the amount of basic dye is less than 0.005 wt%, the hue is not stable and it is 10 wt.
If it exceeds%, sufficient sensitivity cannot be obtained. Examples of the basic dye (d) used in the present invention include auramine base, chalcoxide green S, paramagenta, crystal violet, methyl violet, methyl orange, marine blue, nile blue 2B, basic blue 20, Victoria blue (Hodogaya). Chemistry), malachite green (Hodogaya chemistry), diamond green (Hodogaya chemistry) and the like.

In the general formula (I), all R _{1 s} are C ₂ H
Diamond green of ₅ is preferred. Further, in the general formula (II), malachite green in which all R ₂ are CH ₃ is preferable.

Further, a color-forming dye which develops color upon irradiation with light can be contained in the photopolymerizable composition of the present invention. As a coloring dye, a leuco dye or a fluoran dye,
There are combinations of halogen compounds. Examples of leuco dyes include tris (4-dimethylamino-2-methylphenyl) methane [leuco crystal violet],
Examples include tris (4-dimethylamino-2-methylphenyl) methane [leucomalachite green]. On the other hand, halogen compounds include amyl bromide, isoamyl bromide, isobutylene bromide, ethylene bromide, diphenylmethyl bromide, benzal bromide, methylene bromide, tribromomethylphenyl sulfone, carbon bromide, tris (2,3 −
Dibromopropyl) phosphate, trichloroacetamide, amyl iodide, isobutyl iodide, 1,1,1-trichloro-2,2-bis (p-chlorophenyl) ethane, hexachloroethane, triazine compounds and the like can be mentioned.

Examples of the triazine compound include 2,4,6-tris (trichloromethyl) -s-triazine and 2- (4
-Methoxyphenyl) -4,6-bis (trichloromethyl) -s-triazine.

Among such color-forming dyes, a combination of tribromomethylphenyl sulfone and a leuco dye or a combination of a triazine compound and a leuco dye is useful. If necessary, the photopolymerizable composition of the present invention may contain additives such as a plasticizer. Examples of such additives include phthalic acid esters such as diethyl phthalate.

When the photopolymerizable resin composition is DFR, a formulation containing the components of the photopolymerizable resin composition is applied onto the support layer. As the support layer, a transparent layer that transmits active light is desirable. As the support layer that transmits active light, a polyethylene terephthalate film, a polyvinyl alcohol film, a polyvinyl chloride film, a vinyl chloride copolymer film, a polyvinylidene chloride film, a vinylidene chloride copolymer film, a polymethyl methacrylate copolymer film , Polystyrene films, polyacrylonitrile films, styrene copolymer films, polyamide films, cellulose derivative films, and the like. These films may be stretched if necessary. The thinner the thickness, the more advantageous it is in terms of image forming property and economy, but it is necessary to maintain the strength.
The one having a size of μm is common.

If necessary, a protective layer may be laminated on the surface of the photopolymerizable resin composition layer laminated on the support layer. An important characteristic of this protective layer is that the protective layer has a sufficiently small adhesive force with the photopolymerizable resin composition layer than the support layer and can be easily peeled off. Examples of such a protective layer include a polyethylene film and a polypropylene film.

Although the thickness of the photopolymerizable layer varies depending on the use, it is 5 to 100 μm, preferably 5 to 50 μm for producing a printed circuit board, and the thinner the photopolymerizable resin composition layer, the higher the resolution. Further, the thicker the photopolymerizable resin composition layer, the higher the film strength. The manufacturing process of the printed circuit board using the DFR is performed by a known technique such as an etching method and a plating method.

[0037]

[Examples] [Example 1] The components of the photopolymerizable resin composition shown in Table 1 were prepared, dissolved by stirring in a dissolution tank, and the prepared solution was filtered through a filter. Next, the prepared solution was sent to a die coater by a pump to be uniformly applied on a polyethylene terephthalate film which is a support layer, and sent to a drying zone to dry the solvent. After that, it is laminated with a polyethylene film that is a protective layer, and the photosensitive layer is a DFR with a thickness of 40 μm.
Got In the above process, solubility evaluation, coating speed, coating property evaluation, and sensitivity test were performed by the methods shown below. The results are shown in Table 1.

(1) Solubility Evaluation The degree of clogging of the filter when the preparation liquid was filtered through the filter was evaluated according to the following ranks. When the clogging is small, the solubility is good. The aperture of the filter is 5 μm. A: Good with no clogging. Δ: Filtering is possible although some clogging occurs. Δ ×: Filter clogging occurs, and filtration becomes impossible within 1 hour. X: When filtration is performed, clogging occurs within 10 minutes and filtration becomes impossible.

(2) Coating speed The coating speed in the case of using only methyl ethyl ketone as the solvent is 1, and the ratio is shown. When it is greater than 1, it indicates that the coating speed is higher than that in the case where only methyl ethyl ketone is used as the solvent.

(3) Evaluation of coatability The state of the coated photosensitive layer at the time of coating the preparation liquid on the polyester as the supporting layer using a die coater was evaluated according to the following ranks. ◯: There is no uncoated part and it is applied uniformly and evenly. Δ: There are some uncoated parts. X: Most of the uncoated part.

(4) Sensitivity test A copper-clad laminate obtained by laminating rolled copper foil with a thickness of 35 μm was used as a wet baffle (manufactured by 3M, trade name Scotch Bright # 60).
The photopolymerizable resin composition layer was applied to the polished surface with a hot roll laminator while peeling off the polyethylene film as the protective layer of the DFR obtained in the above step.
It laminated at 05 degreeC and obtained the laminated body. Next, this laminate was exposed at 80 mJ / cm ² through a step tablet (21-step step tablet manufactured by Stoffer Co., Ltd.) with an ultrahigh pressure mercury lamp (HMW-201KB manufactured by Oak Manufacturing Co., Ltd.). After that, the polyethylene terephthalate film, which is the supporting layer, was peeled off, and then the laminated body was heated at 30 ° C. for 1 wt.
% Sodium carbonate aqueous solution was sprayed for 50 seconds. At this time, read the maximum number of steps in which the film remains completely on the step tablet.

[Examples 2 to 10 and Comparative Examples 1 to 6] By the same method as in Example 1, the components of the photopolymerizable resin composition having the composition shown in Table 1 were prepared, DFR was obtained, and the solubility was evaluated. The coating speed, coating property evaluation, and sensitivity test were performed. The results are shown in Table 1.

In Table 1, symbols indicate the following. <Symbols> P-1: Methyl methacrylate 70w obtained by solution polymerization
t%, methacrylic acid 23 wt%, butyl acrylate 7w
t% ternary copolymer methyl ethyl ketone solution (solid content weight ratio 30%, weight average molecular weight 100,000, acid equivalent 37
4) P-2: 70w of methyl methacrylate obtained by solution polymerization
t%, methacrylic acid 23 wt%, butyl acrylate 7w
t% ternary copolymer methyl ethyl ketone and ethanol mixed solution (solvent weight ratio: methyl ethyl ketone / ethanol = 90/10, solid content weight ratio 40%, weight average molecular weight 100,000, acid equivalent 374) P-3: Suspension 70w methyl methacrylate obtained by polymerization
t%, methacrylic acid 23 wt%, butyl acrylate 7w
t% ternary copolymerization (solid content weight ratio 100%, weight average molecular weight 100,000, acid equivalent 374) M-1: trimethylolpropane triacrylate M-2: nonaethylene glycol diacrylate M-3: β-hydroxy Propyl-β '-(acryloyloxy) propyl phthalate M-4: Polypropylene glycol having an average of 8 moles of propylene oxide added, and ethylene oxide further having an average of 3 moles on each end, dimethacrylate M-5: hexamethylene diisocyanate And oligo propylene glycol monomethacrylate (NOF CORPORATION)
Made from Blemmer PP1000) A-1: benzophenone A-2: 4,4'-bis (diethylamino) benzophenone A-3: 2- (o-chlorophenyl) -4,5-diphenylimidazole dimer B- 1: Malachite Green B-2: Diamond Green B-3: Leuco Crystal Violet B-4: Tribromomethylphenylsulfone S-1: Methylethylketone S-2: Ethanol

[0044]

[Table 1]

[0045]

[Table 2]

[0046]

EFFECTS OF THE INVENTION The method for producing a photopolymerizable resin composition of the present invention has good solubility, is capable of reducing filter clogging during the filtration of a preparation liquid, and is improved in productivity. It is useful as a method for producing a DFR for producing a circuit board.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G03F 7/004 505 G03F 7/004 505 7/033 7/033 H05K 3/00 H05K 3/00 FF term (Reference) 2H025 AB15 AC01 AD01 BC14 BC32 BC42 CA01 CA27 CA28 CB13 CB14 CB43 CB51 CB55 CC13 FA03 FA17 2H096 AA26 BA05 BA20 EA02 GA08 LA17 4J011 AA01 BA04 CA01 CA08 DA02 EA01 FA01 FA07 FB01 PA08 Q16 PC15 PA15 PA15 PA15 PA15 PA45 PA15 PA15 PA15 PA15 PA25 PA15 PA15 PA25 PA15 PA25 PA15 PA15 PA25 PA15 PA15 PA15 PA25 PA15 PA15 PA15 PA25 PA15 PA15 PA25 PA16 PA45 PA15 RA17 SA21 SA31 SA51 SA63 SA64 SA78 UA01 VA01 4J026 AA17 AA42 AA43 AA45 AA52 AA53 AA55 AC17 AC23 AC33 BA27 BA28 DB05 DB06 DB36 FA05 GA07 GA10

Claims (4)

[Claims] 1. A method for producing a photopolymerizable resin composition, wherein the composition (a) has a carboxyl group content in acid equivalent of 100 to 600 and a weight average molecular weight of 20,000 to.
500,000 binder resin, (b) photopolymerizable unsaturated compound, (c) photopolymerization initiator, (d) basic dye,
Which is produced from a mixed solution in which these components are uniformly dissolved in a mixed solvent, wherein the mixed solvent is a mixture of an alcohol component and other components, and the ratio of the alcohol component is 2 to 50 wt%. A photopolymerizable resin composition, characterized in that the concentration of the composition in the preparation liquid is 30 to 80 wt% and the viscosity of the preparation liquid is 500 to 4000 mPa · sec at 25 ° C. Manufacturing method. 2. The components other than alcohol in the mixed solvent are (i) ketones typified by methyl ethyl ketone, (ii) esters typified by ethyl acetate, (i)
ii) One or more selected from the group of ethers represented by tetrahydrofuran, and the method for producing a photopolymerizable resin composition according to claim 1. 3. The method for producing a photopolymerizable resin composition according to claim 1, wherein an alcohol having 3 or less carbon atoms is used as an alcohol component in the mixed solvent. 4. The photopolymerizable resin composition according to claim 1, wherein a compound represented by the following general formula (I) and / or (II) is used as the basic dye (d). Production method. [Chemical 1] (In the formula, R ₁ may be the same or different and represents CH ₃ or C ₂ H _5. ) (In the formula, R ₂ may be the same or different and represents CH ₃ or C ₂ H _5. )