JP4826187B2 - Manufacturing method of color filter - Google Patents

Description

  The present invention relates to a photosensitive resin composition for forming a colored layer used for forming a colored layer of a color filter for a transflective liquid crystal display device, for example, and a method for producing a color filter using the same.

  In recent years, a transflective liquid crystal display device utilizing external light reflection and backlight transmitted light has been developed as a liquid crystal display device. The transflective liquid crystal display device uses external light to display. The conventional reflective color liquid crystal display device is advantageous in that it also has a backlight and can perform display (transmission display) using the backlight even when the surroundings are dark. However, in the color filter used in such a transflective liquid crystal display device, since the external light passes through the colored layer twice as incident light and reflected light, the color of the reflected light region where display is performed by the external light. In some cases, there is a problem that the characteristics and the color characteristics of the transmitted light region where the display is performed by the backlight light are different.

  In order to solve such a problem, for example, a method of forming a thick colored layer in the transmitted light region and forming a thin colored layer in the reflected light region, etc. A method of forming a layer has been adopted. However, in this method, when forming a color filter having colored layers of three colors (red (R), green (G), and blue (B)), for example, a photolithography method or the like must be repeated six times. The process was complicated.

  Therefore, for example, a method has been proposed in which the thickness of the colored layer in the transmitted light region and the reflected light region is uniform, and a portion where the colored layer is not formed in the reflected light region, that is, a hole is provided. (For example, refer to Patent Document 1). According to this method, the area of the colored layer in the reflected light region can be adjusted by adjusting the area of the hole in the reflected light region, and the color characteristics of the reflected light region can be adjusted. It becomes. As a method for producing a colored layer having a hole on the reflected light region, for example, after applying a colored layer forming photosensitive resin composition on a substrate, a desired portion is formed on a portion where the reflected light region is formed. Examples include a method of performing exposure by using a photomask provided with a shielding portion and an opening, and developing.

Here, in recent years, there has been a demand for higher definition of color filters, and in the color filters for transflective liquid crystal display devices, it is necessary to form holes in a fine shape in the reflected light region. Yes. However, when a colored layer is formed by the above-described method using a general photosensitive resin composition for forming a colored layer, it becomes difficult to form a fine pattern due to diffraction of energy irradiated at the time of exposure, As a result, there is a problem that the depth of the formed hole portion is shallow or the hole portion is crushed.
JP 2002-333622 A

  Then, provision of the photosensitive resin composition for colored layer formation which can form a hole in a fine pattern shape is desired.

  The present invention is a photosensitive resin composition for forming a colored layer, which contains a pigment, a polymerization initiator, a sensitizer, and a binder component, and is used for forming a red colored layer or a blue colored layer. The sensitizer has a maximum absorption wavelength in a wavelength region within a range of 340 nm to 420 nm, and an absorption coefficient at the maximum absorption wavelength of the sensitizer is 80000 ml / g · cm or more, and the sensitizer has a maximum absorption. The wavelength is 40 nm or more larger than the maximum absorption wavelength of the polymerization initiator, and the sum of the contents of the sensitizer and the polymerization initiator is 4 mass relative to the solid content of the photosensitive resin composition for forming a colored layer. % To 17% by mass, and when the mass of the polymerization initiator contained in the colored layer forming photosensitive resin composition is 1, it is contained in the colored layer forming photosensitive resin composition. The sensitizer has a mass of 0.05 Providing a colored layer forming photosensitive resin composition being in the range of 0.45.

  In the present invention, since the sum of the contents of the sensitizer and the polymerization initiator is within the above range, the sensitivity to the energy of the photosensitive resin composition for forming a colored layer can be lowered. it can. Therefore, when forming a colored layer by a photolithography method, even if diffraction of the irradiated energy occurs, the photosensitive resin composition for forming the colored layer is cured at the portion irradiated with the diffracted energy. Can be prevented. Therefore, according to this invention, it can be set as the photosensitive resin composition for colored layer formation which can form the colored layer which has a fine hole part. In the present invention, since the sensitizer and the polymerization initiator are used in combination, even if the sensitivity to the energy of the photosensitive resin composition for forming a colored layer is reduced as described above, In the portion where the colored layer is formed, not only the surface of the photosensitive resin composition for forming the colored layer but also the substrate side can be cured. Therefore, it can be set as the photosensitive resin composition for colored layer formation which can form a colored layer with favorable adhesiveness with a board | substrate.

  The present invention is a photosensitive resin composition for forming a colored layer, which contains a pigment, a first polymerization initiator, a second polymerization initiator, a sensitizer, and a binder component, and is used when forming a green colored layer. The sensitizer has a maximum absorption wavelength in a wavelength region within a range of 340 nm to 420 nm, the absorption coefficient at the maximum absorption wavelength of the sensitizer is 80000 ml / g · cm or more, and the sensitizer The maximum absorption wavelength is 40 nm or more larger than the maximum absorption wavelength of the first polymerization initiator, the second polymerization initiator has a maximum absorption wavelength in a wavelength range of 315 nm to 335 nm, and the sensitizer. The sum of the contents of the first polymerization initiator and the second polymerization initiator is in the range of 4% by mass to 9% by mass with respect to the solid content of the photosensitive resin composition for forming a colored layer. In the photosensitive resin composition for forming a colored layer. When the sum of the masses of the first polymerization initiator and the second polymerization initiator is 1, the mass of the sensitizer contained in the colored layer forming photosensitive resin composition is 0.05 to Provided is a photosensitive resin composition for forming a colored layer, which is within a range of 0.45.

  In the present invention, since the sum of the contents of the sensitizer, the first polymerization initiator, and the second polymerization initiator is within the above range, the sensitivity of the photosensitive resin composition for forming a colored layer to energy. Can be low. Therefore, when the colored layer is formed by photolithography, the photosensitive resin composition for forming the colored layer is cured at the portion irradiated with the diffracted energy, even when diffraction of the irradiated energy occurs. Can be prevented. Therefore, according to this invention, it can be set as the photosensitive resin composition for colored layer formation which can form the colored layer which has a fine hole part. In the present invention, since the sensitizer, the first polymerization initiator, and the second polymerization initiator are used in combination, the sensitivity to the energy of the colored layer forming photosensitive resin composition is reduced as described above. Even in this case, the portion where the colored layer is formed can be cured not only on the surface of the colored layer forming photosensitive resin composition but also on the substrate side. Therefore, it can be set as the photosensitive resin composition for colored layer formation which can form a colored layer with favorable adhesiveness with a board | substrate. In general, the photosensitive resin composition for forming a colored layer used for forming a green colored layer is compared with the photosensitive resin composition for forming a colored layer used for forming a colored layer of another color. In the present invention, since the second polymerization initiator having a maximum absorption wavelength different from that of the first polymerization initiator is used in the present invention, the colored layer is formed by utilizing energy in a wider wavelength range. It becomes possible to harden the photosensitive resin composition. Therefore, it can be set as the photosensitive resin composition for colored layer formation which can form a colored layer with favorable adhesiveness with a board | substrate and favorable curability.

  In the said invention, the said sensitizer has a maximum absorption wavelength in the wavelength range within the range of 340 nm-400 nm, and the extinction coefficient of the maximum absorption wavelength of the said sensitizer is 80000 ml / g * cm or more. Is preferred. Generally, since the peak wavelength of energy emitted from a light source used for exposure is in the above wavelength range, the sensitizer has the maximum absorption wavelength within the above range. This is because the sensitizer absorbs efficiently, and the absorbed energy can contribute to the curing of the photosensitive resin composition for forming the colored layer.

  The present invention provides a color filter comprising a colored layer forming step of forming a colored layer having a hole by a photolithography method using the photosensitive resin composition for forming a colored layer described above. Provide a method. Since the colored layer is formed using the photosensitive resin composition for forming the colored layer, according to the present invention, the pores can be formed in a fine pattern in the colored layer. The adhesion between the substrate and the colored layer can be improved.

  According to the present invention, it is possible to provide a photosensitive resin composition for forming a colored layer that can form a colored layer having fine pores and good adhesion to the substrate. .

  The present invention relates to a photosensitive resin composition for forming a colored layer used for forming a colored layer such as a color filter for a transflective liquid crystal display device, and a method for producing a color filter using the same. Each will be described separately below.

A. First, the photosensitive resin composition for forming a colored layer of the present invention will be described. The photosensitive resin composition for forming a colored layer of the present invention has two embodiments depending on the color difference of the formed colored layer. Hereinafter, each embodiment will be described.

1. 1st embodiment First, the 1st embodiment of the photosensitive resin composition for colored layer formation of this invention is demonstrated. The photosensitive resin composition for forming a colored layer of this embodiment contains a pigment, a polymerization initiator, a sensitizer, and a binder component, and is used when forming a red colored layer or a blue colored layer. In the present embodiment, the sensitizer has a maximum absorption wavelength in a wavelength region within a predetermined range, and the extinction coefficient at the maximum absorption wavelength of the sensitizer is not less than a predetermined value. Further, the maximum absorption wavelength of the sensitizer is set to be a predetermined value or more larger than the maximum absorption wavelength of the polymerization initiator, and the sum of the contents of the sensitizer and the polymerization initiator is the formation of the colored layer. It is set within a predetermined range with respect to the solid content of the photosensitive resin composition. Furthermore, when the mass of the polymerization initiator contained in the photosensitive resin composition for forming a colored layer is 1, the mass of the sensitizer contained in the photosensitive resin composition for forming a colored layer is It is within a predetermined range.

  As described above, for example, in a color filter used in a transflective liquid crystal display device, it is desired to form a colored layer having fine pores. However, when such a colored layer is formed by a photolithography method using a general photosensitive resin composition for forming a colored layer, it is for forming a colored layer that should not be exposed by energy diffraction or the like. There is a problem that the photosensitive resin composition is exposed to light, for example, the depth of the hole is shallow, or the hole is crushed.

  On the other hand, according to the present embodiment, since the sum of the contents of the polymerization initiator and the sensitizer in the photosensitive resin composition for forming a colored layer is within a predetermined range, The sensitivity with respect to the energy of the photosensitive resin composition can be made low. Therefore, when a colored layer is formed by a photolithography method using the photosensitive resin composition for forming a colored layer of this embodiment, even if energy diffraction or the like occurs, the portion that should not be exposed originally It is possible to prevent the photosensitive resin composition for forming the colored layer from being exposed to light and the like, and it is possible to prevent the depth of the hole from becoming shallow or the hole from being crushed.

Further, in this embodiment, since the sensitizer and the polymerization initiator are used in combination, the sum of the contents of the polymerization initiator and the sensitizer is within the above-described range, and the colored layer forming photosensitive layer is used. Even if it is a case where the sensitivity with respect to the energy of an adhesive resin composition is made low, the adhesiveness of the formed colored layer and a board | substrate can be made high. This is because, when the maximum absorption wavelengths of the polymerization initiator and the sensitizer are close to each other, the energy of the wavelength in the vicinity of the maximum absorption wavelength among the energy irradiated during exposure is a photosensitive resin for forming a colored layer. It is consumed by the sensitizer and the polymerization initiator on the surface side of the composition, and it is difficult to reach the substrate side of the photosensitive resin composition for forming a colored layer. Therefore, in this part, the polymerization initiator cannot sufficiently exert its function, and the curing of the photosensitive resin composition for forming the colored layer is weakened. Therefore, the adhesion between the formed colored layer and the substrate is weak. Become. On the other hand, in this embodiment, since the maximum absorption wavelength of the polymerization initiator and the sensitizer are different from each other by a predetermined value or more, the energy in the vicinity of the maximum absorption wavelength of the sensitizer is a photosensitive resin composition for forming a colored layer. It is possible to easily reach the substrate side of the object. Therefore, the sensitizer absorbs the energy at this portion, and the absorbed energy can contribute to the reaction start of the polymerization initiator. Therefore, according to this invention, the photosensitive resin composition for colored layer formation can fully be hardened to the board | substrate side, and it becomes possible to form a colored layer with favorable adhesiveness with a board | substrate.
Hereinafter, it demonstrates in detail for every material contained in the photosensitive resin composition for colored layer formation of this embodiment.

(Sensitizer)
First, the sensitizer contained in the photosensitive resin composition for forming a colored layer of this embodiment will be described. The sensitizer used in the present embodiment absorbs the irradiated energy when the photosensitive resin composition for forming a colored layer is applied onto a substrate and exposed to light, and the polymerization starts to be described later. It is a substance that plays a role in contributing to the reaction initiation of the agent.

  The sensitizer used in this embodiment has a maximum absorption wavelength in the range of 340 nm to 420 nm, and has a maximum absorption wavelength in the range of 340 nm to 410 nm, particularly in the range of 340 nm to 400 nm. It is preferable. This is because it is possible to efficiently absorb energy irradiated from an exposure apparatus generally used in forming the colored layer. Further, the energy on the longer wavelength side of the above wavelength region is not scattered on the surface of the photosensitive resin composition for forming the colored layer, compared with the energy in the wavelength region on the shorter wavelength side. It has the property of easily reaching the substrate side of the resin composition. Therefore, by making the sensitizer have the maximum absorption wavelength in the wavelength region described above, the photosensitive resin composition for forming a colored layer can be sufficiently cured to the substrate side during exposure, Adhesion between the formed colored layer and the substrate can be improved. The maximum absorption wavelength is the absorption wavelength obtained when an absorption spectrum in a wavelength region within a range of 200 nm to 700 nm is measured with an ultraviolet / visible spectrophotometer (UV / Vis / NIR Spectroscopy manufactured by PERKIN ELMER). The maximum absorption wavelength.

  At this time, the extinction coefficient at the maximum absorption wavelength is 80000 ml / g · cm or more, preferably 90000 ml / g · cm or more, and particularly preferably 100000 ml / g · cm or more. This is because the sensitivity of the sensitizer at the maximum absorption wavelength can be improved. The light absorption coefficient is determined by dissolving the photosensitive resin composition for forming the colored layer in methanol, placing it in a quartz cell with a length of 1 cm for light transmission, and UV / visible spectrophotometer (UV manufactured by PERKIN ELMER / Vis / NIR Spectroscopy).

  In the present embodiment, the maximum absorption wavelength of the sensitizer is 40 nm or more larger than the maximum absorption wavelength of the polymerization initiator described later, and particularly within the range of 40 nm to 120 nm, particularly within the range of 40 nm to 80 nm. It is preferable to make it large. Thereby, the energy of the wavelength which a polymerization initiator does not absorb can be absorbed with a sensitizer, and it can contribute to the reaction start of a polymerization initiator. Further, the energy on the long wavelength side can easily reach the substrate side of the photosensitive resin composition for forming the colored layer without being scattered on the surface of the photosensitive resin composition for forming the colored layer, as compared with the energy on the short wavelength side. There is a nature. Therefore, by making the maximum absorption wavelength of the sensitizer larger than the maximum absorption wavelength of the polymerization initiator, the sensitizer can easily exhibit curing on the substrate side. Thereby, when the photosensitive resin composition for forming a colored layer is exposed, the photosensitive resin composition for forming a colored layer can be sufficiently cured to the substrate side. The adhesion can be made good.

  As such a sensitizer, for example,

The sensitizer represented by these can be mentioned. Here, R ₁ , R ₂ , R ₃ and R ₄ each represent either hydrogen or an alkyl group having 1 to 5 carbon atoms, and may be the same or different.

  Specific examples of the sensitizer include 4,4′-bis (diethylamino) benzophenone, 4,4′-bis (dimethylamino) benzophenone, 4-methyl-4′-diethylaminobenzophenone, and 4-methoxy-4 ′. -Diethylaminobenzophenone, 4,4'-bis (dipropylamino) benzophenone, 4,4'-bis (diisopropylamino) benzophenone, etc. can be mentioned, and these can be used alone or in combination of two or more. .

  Further, the sensitizer comprises a content of the sensitizer contained in the photosensitive resin composition for forming a colored layer and a polymerization initiator contained in the photosensitive resin composition for forming a colored layer. It is added so that the sum of the contents is in the range of 4% by mass to 17% by mass with respect to the solid content of the photosensitive resin composition for forming the colored layer, and particularly in the range of 6% by mass to 17% by mass. In particular, it is preferable to be within a range of 6% by mass to 15% by mass. Thereby, the sensitivity with respect to the energy of the photosensitive resin composition for forming the colored layer can be lowered, and even when the energy irradiated at the time of exposure is diffracted, the influence should be reduced. Because you can.

  At this time, as a mass ratio of the polymerization initiator and the sensitizer contained in the photosensitive resin composition for forming a colored layer, when the mass of the polymerization initiator is 1, the sensitizer Is preferably in the range of 0.05 to 0.45, more preferably in the range of 0.05 to 0.25, and particularly preferably in the range of 0.1 to 0.25. This is because by containing the sensitizer and the polymerization initiator described below at such a ratio, it is possible to cure not only the surface of the photosensitive resin composition for forming a colored layer but also the substrate side. .

  In addition, as specific content of the said sensitizer, it exists in the range of 0.02 mass%-7.7 mass% in solid content of the photosensitive resin composition for colored layer formation, Especially 0.6 mass% It is preferable to be in the range of ˜7.7 mass%, particularly in the range of 0.6 mass% to 6.8 mass%. This is because when the content of the sensitizer is within the above range, the adhesion between the formed colored layer and the substrate can be improved.

(Polymerization initiator)
Next, the polymerization initiator used in this embodiment will be described. The polymerization initiator used in the present embodiment has a role of generating active species such as radicals by the action of irradiated energy and initiating a polymerization reaction of a binder component described later.

  The polymerization initiator used in the present embodiment is not particularly limited as long as it has a maximum absorption wavelength that is smaller than the above-described value than the maximum absorption wavelength of the sensitizer described above. The maximum absorption wavelength is preferably in the wavelength range of 260 nm to 310 nm, particularly in the range of 280 nm to 310 nm. This is because the colored layer forming polymerization initiator is less likely to be colored by the addition of the polymerization initiator.

At this time, the extinction coefficient at the maximum absorption wavelength of the polymerization initiator is preferably 40000 ml / g · cm or more, more preferably 50000 ml / g · cm or more. This is because the polymerization initiator can efficiently absorb energy at the maximum absorption wavelength when the extinction coefficient at the maximum absorption wavelength of the polymerization initiator is not less than the above value.

  As such a polymerization initiator, for example, an acetophenone-based polymerization initiator can be mentioned.

The polymerization initiator represented by these can be mentioned. Here, R ₁ , R ₂ , R ₃ and R ₄ each represent either hydrogen or an alkyl group having 1 to 5 carbon atoms, and may be the same or different. Ar represents a morpholino group.

  Specific examples of the polymerization initiator include 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinopropan-1-one and 2-methyl-1 [4- (ethylthio) phenyl] -2. -Morpholinopropan-1-one, 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinobutan-1-one, etc. can be mentioned, and these can be used alone or in combination of two or more. Can be used.

  Further, as described above, in the photosensitive resin composition for forming a colored layer, the polymerization initiator has a predetermined proportion of the sensitizer and the sum of the contents of the polymerization initiator and the sensitizer. It is contained so as to be within a predetermined range. Specifically, the content of the polymerization initiator is within the range of 2.8% by mass to 16.2% by mass in the solid content of the photosensitive resin composition for forming a colored layer, and particularly 2.8% by mass to 15%. It is preferable to be within a range of .3% by mass, particularly within a range of 4.0% by mass to 13.5% by mass.

(Binder component)
Next, the binder component used in this embodiment will be described. The binder component used in this embodiment plays a role as a binder in the formed colored layer, and is not particularly limited as long as it has good adhesion to the substrate.

  Such a binder component is preferably contained in the range of 5% by mass to 60% by mass, particularly in the range of 10% by mass to 50% by mass, in the solid content of the photosensitive resin composition for forming a colored layer. . This is because when the content of the binder component is less than the above range, the adhesion between the formed colored layer and the substrate tends to be inferior.

  Here, examples of the binder component used in this embodiment include polymerizable monomer components and polymer components. The polymer component used in this embodiment can be the same as that used for forming a general colored layer. Examples of the polymer component include ethylene-vinyl acetate copolymer, ethylene-chloride. Vinyl copolymer, ethylene vinyl copolymer, polystyrene, acrylonitrile-styrene copolymer, ABS resin, polymethacrylic acid resin, ethylene methacrylic acid resin, polyvinyl chloride resin, chlorinated vinyl chloride, polyvinyl alcohol, polyethylene terephthalate, poly Butylene terephthalate, polycarbonate, polyvinyl acetal, polyether ether ketone, polyether sulfone, polyphenylene sulfide, polyarylate, polyvinyl butyral, epoxy resin, phenoxy resin, polyimide resin, polyamide Mide resin, polyamic acid resin, polyetherimide resin, phenol resin, urea resin, etc., and polymerizable monomers methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) ) Acrylate, sec-butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, n-pentyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n -Octyl (meth) acrylate, n-decyl (meth) acrylate, styrene, α-methylstyrene, N-vinyl-2-pyrrolidone, glycidyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentanyl (meth) acrylate A dimer of an acrylic acid, methacrylic acid, and acrylic acid (for example, Toa Synthetic Chemical Co., Ltd.), at least one of a rate, dicyclopentanyloxyethyl (meth) acrylate, phenyl (meth) acrylate, and benzyl (meth) acrylate ) M-5600), itaconic acid, crotonic acid, maleic acid, fumaric acid, vinyl acetic acid, polymers or copolymers composed of one or more of these acid anhydrides, and the like. Moreover, although the polymer etc. which added the ethylenically unsaturated compound which has a glycidyl group or a hydroxyl group to said copolymer are mentioned, it is not limited to these.

  In this embodiment, among the above polymer components, from the viewpoint of compatibility with the monomer components used together, polymethyl methacrylate resin, polyethyl methacrylate resin, polymethyl methacrylate resin and polyethyl methacrylate Resin copolymers, phenoxy resins, epoxy resins, polycarbonate resins, polystyrene resins, ethyl hydroxyethyl cellulose, cellulose triacetate, and the like can be preferably used. Particularly preferably, polymethyl methacrylate resin, polyethyl methacrylate resin, polystyrene resin, methacrylic acid and styrene, glycidyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentanyl (meth) acrylate, benzyl (meth) acrylate These two or more types of copolymers, phenoxy resins, epoxy resins, and modified products thereof can be used.

  The molecular weight of such a polymer component is within the range of 3000 to 100,000, particularly 5000 to 500,000 in terms of good adhesion between the formed colored layer and the substrate and the ability to form fine pores. It is preferable to be within the range of 50,000.

  Specific examples of the monomer component include allyl (meth) acrylate, benzyl (meth) acrylate, butoxyethyl (meth) acrylate, butoxyethylene glycol (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentanyl ( (Meth) acrylate, 2-ethylhexyl (meth) acrylate, glycerol (meth) acrylate, glycidyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, isobornyl (meth) acrylate, isodexyl ( (Meth) acrylate, isooctyl (meth) acrylate, lauryl (meth) acrylate, 2-methoxyethyl (meth) acrylate, methoxyethylene glycol (meth) acrylate Phenoxyethyl (meth) acrylate, stearyl (meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,5-pentanediol di (meth) Acrylate, 1,6-hexanediol di (meth) acrylate, 1,3-propanediol (meth) acrylate, 1,4-cyclohexanediol di (meth) acrylate, 2,2-dimethylolpropane di (meth) acrylate, Glycerol di (meth) acrylate, tripropylene glycol di (meth) acrylate, glycerol tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, polyoxyethylated trimethylolpropane tri (Meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, triethylene glycol di (meth) acrylate, polyoxypropyltrimethylolpropane tri (meth) acrylate, butylene glycol di (meth) acrylate, 1 , 2,4-butanetriol tri (meth) acrylate, 2,2,4-trimethyl-1,3-pentanediol di (meth) acrylate, diallyl fumarate, 1,10-decanediol dimethyl (meth) acrylate, di Pentaerythritol hexa (meth) acrylate, γ-methacryloxypropyltrimethoxysilane, 1-vinyl-2-pyrrolidone, 2-hydroxyethylacryloyl phosphate, tetrahydrofurfuryl (medium ) Acrylate, dicyclopentenyl (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, 3-butanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, hydroxypivalin Acid ester neopentyl glycol di (meth) acrylate, phenol-ethylene oxide modified (meth) acrylate, phenol-propylene oxide modified (meth) acrylate, N-vinyl-2-pyrrolidone, bisphenol A-ethylene oxide modified di (meth) acrylate , Pentaerythritol di (meth) acrylate monostearate, tetraethylene glycol di (meth) acrylate, polypropylene glycol di (meth) Chryrate, trimethylolpropane propylene oxide modified tri (meth) acrylate, isocyanuric acid ethylene oxide modified tri (meth) acrylate, trimethylolpropane ethylene oxide modified tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipenta Erythritol hexa (meth) acrylate, pentaerythritol tetra (meth) acrylate, urethane (meth) acrylate oligomer in which (meth) acrylate group is bonded to oligomer having polyurethane structure, (meth) acrylate group is bonded to oligomer having polyester structure Polyester (meth) acrylate oligomer and epoxy (meth) acrylate group bonded to (meth) acrylate group oligomer ) Acrylate oligomer, polyurethane (meth) acrylate having a (meth) acrylate group, polyester (meth) acrylate having a (meth) acrylate group, epoxy (meth) acrylate resin having a (meth) acrylate group, and the like. One type or two or more types can be used.

  In the present embodiment, (meth) acrylate means either an acrylate group or a methacrylate group.

  Moreover, in this embodiment, you may introduce | transduce an acidic functional group into said monomer component. This makes it possible to increase the solubility of the photosensitive resin composition for forming a colored layer in a developing solution during development when forming the colored layer, and the photosensitive resin for forming the colored layer in the formed holes. This is because the residue of the composition can be reduced. Examples of such an acidic functional group are those that can be alkali-developable, and specific examples thereof include a carboxyl group, a sulfonic acid group, and a phosphoric acid group. Among these, a carboxyl group is preferable.

  Furthermore, in this embodiment, in order to improve the adhesion between the formed colored layer and the substrate, the number of functional groups in the monomer component is preferably 2 to 6, particularly 3 to 6.

  In this embodiment, the mass ratio of the monomer component to the polymer component is such that the mass of the polymer component is in the range of 0.8 to 3, particularly 1 to 2. It is preferable to be within the range of 5. Thereby, it is possible to form a fine hole, and it is possible to improve the adhesion between the formed colored layer and the substrate.

(Pigment)
Next, the pigment used in this embodiment will be described. The pigment used in this embodiment is not particularly limited as long as it is a pigment that can be colored to the target color of the photosensitive resin composition for forming a colored layer, and is a pigment that is used for forming a general colored layer. And can be similar.

  In this embodiment, such a pigment is contained in the solid content of the photosensitive resin composition for forming a colored layer in the range of 13% by mass to 50% by mass, particularly in the range of 17% by mass to 45% by mass. It is preferable.

  Moreover, when forming a red colored layer using the photosensitive resin composition for colored layer formation of this embodiment, as said pigment, PR (pigment red) 109, 122, 123, 166, 177, 190, 206, 209, 215, 242, 254, etc. can be used. In addition, you may use these pigments 1 type or in combination of 2 or more types.

  Moreover, when forming a blue colored layer using the photosensitive resin composition for colored layer formation of this embodiment, as said pigment, PB (pigment blue) 15: 1, 15: 2, 15: 3, 15 : 4, 15: 5, 15: 6, PV (Pigment Violet) 19, 23, etc. can be used. In addition, you may use these pigments 1 type or in combination of 2 or more types.

(Photosensitive resin composition for forming colored layer)
The photosensitive resin composition for forming a colored layer in the present embodiment is not particularly limited as long as it contains the sensitizer, the polymerization initiator, the binder component, and the pigment described above. It may contain a solvent, an adhesion aid, various adjusting agents, and the like.

  In this embodiment, it is particularly preferable to use an adhesion assistant in order to improve the adhesion between the formed colored layer and the substrate. As such an adhesion assistant, for example, those used as silane coupling materials can be used, and specifically, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3 -Methacryloxypropylmethyldiethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-acryloxypropyltrimethoxysilane, 3-mercaptopropylmethyldimethoxysilane, 3-mercaptopropyltrimethoxysilane, 2- (3,4- Epoxy cyclohexyl), ethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, and the like. Or it can be used as a mixture of two or more.

  Further, the adhesion aid is contained in the solid content of the photosensitive resin composition for forming a colored layer in the range of 2% by mass to 5% by mass, particularly in the range of 3% by mass to 5% by mass. preferable.

  In this embodiment, the sensitizer having an absorption wavelength different from that of the sensitizer described above and the polymerization initiator having an absorption wavelength different from that of the polymerization initiator described above are contained in the photosensitive resin composition for forming a colored layer. It may be contained in. Even in this case, the content of all the sensitizers contained in the photosensitive resin composition for forming the colored layer and all the polymerization initiators contained in the photosensitive resin composition for forming the colored layer. The sum of the contents is in the range of 4% by mass to 17% by mass, particularly in the range of 6% by mass to 17% by mass, particularly in the range of 6% by mass to 15% with respect to the solid content of the photosensitive resin composition for forming the colored layer. It is preferable to be within the range of mass%.

  Here, the photosensitive resin composition for forming a colored layer of the present embodiment is used when forming a colored layer by a photolithography method, and particularly has a hole in the region for reflected light, and is a transflective type. It is preferably used for forming a colored layer of a color filter for a liquid crystal display, forming a colored layer of an array substrate with a color filter, or the like.

  The light source used when exposing the colored resin composition for forming a colored layer can be the same as the light source generally used for forming the colored layer, but it is particularly high pressure. It is preferable to use a lamp having a high emission line in the ultraviolet part, such as a mercury lamp, a low-pressure mercury lamp, or a metal halide lamp.

2. Second Embodiment Next, a second embodiment of the photosensitive resin composition for forming a colored layer of the present invention will be described. The photosensitive resin composition for forming a colored layer according to this embodiment contains a pigment, a first polymerization initiator, a second polymerization initiator, a sensitizer, and a binder component, and is used when forming a green colored layer. Is. In the present embodiment, the sensitizer has a maximum absorption wavelength in a wavelength region within a predetermined range, and the extinction coefficient at the maximum absorption wavelength of the sensitizer is not less than a predetermined value. The maximum absorption wavelength of the sensitizer is greater than the maximum absorption wavelength of the first polymerization initiator by a predetermined value or more, and the second polymerization initiator has a maximum absorption in a wavelength region within a predetermined range. It has a wavelength. Furthermore, the sum of the contents of the sensitizer, the first polymerization initiator, and the second polymerization initiator is contained within a predetermined range in the solid content of the colored layer forming photosensitive resin composition. When the sum of the masses of the first polymerization initiator and the second polymerization initiator contained in the photosensitive resin composition for forming a colored layer is 1, the colored layer forming photosensitive material is used. The mass of the sensitizer contained in the photosensitive resin composition is set within a predetermined range.

  As described above, for example, in a color filter used in a transflective liquid crystal display device, it is desired to form a colored layer having fine pores. However, when such a colored layer is formed by a photolithography method using a general photosensitive resin composition for forming a colored layer, it is for forming a colored layer that should not be exposed by energy diffraction or the like. There is a problem that the photosensitive resin composition is exposed to light, for example, the depth of the hole is shallow, or the hole is crushed.

  On the other hand, according to this embodiment, the sum of the contents of the first polymerization initiator, the second polymerization initiator, and the sensitizer in the photosensitive resin composition for forming a colored layer is within a predetermined range. Therefore, the sensitivity to the energy of the photosensitive resin composition for forming a colored layer can be lowered. Therefore, when a colored layer is formed by a photolithography method using the photosensitive resin composition for forming a colored layer of this embodiment, even if energy diffraction or the like occurs, the portion that should not be exposed originally It is possible to prevent the photosensitive resin composition for forming the colored layer from being exposed to light and the like, and it is possible to prevent the depth of the hole from becoming shallow or the hole from being crushed.

  Further, in this embodiment, since a sensitizer having a maximum absorption wavelength within a predetermined range and a first polymerization initiator having a maximum absorption wavelength within a predetermined range are used in combination, the colored layer forming photosensitive layer is used. Even if it is a case where the sensitivity with respect to the energy of an adhesive resin composition is made low, the adhesiveness of the formed colored layer and a board | substrate can be made high. As described above, when the maximum absorption wavelengths of the polymerization initiator and the sensitizer are close to each other, the energy of the wavelength in the vicinity of the maximum absorption wavelength among the energy irradiated at the time of exposure is a coloring layer forming photosensitive layer. Is consumed by the sensitizer and the polymerization initiator on the surface side of the photosensitive resin composition, and it is difficult to reach the substrate side of the photosensitive resin composition for forming the colored layer. Therefore, in this part, the polymerization initiator cannot sufficiently exert its function, and the curing of the photosensitive resin composition for forming the colored layer is weakened. Therefore, the adhesion between the formed colored layer and the substrate is weak. Become. On the other hand, in the present embodiment, since the maximum absorption wavelength of the first polymerization initiator and the sensitizer are different from each other by a predetermined value or more, the energy in the vicinity of the maximum absorption wavelength of the sensitizer is photosensitive for color layer formation. It can be easily reached to the substrate side of the resin composition. For this reason, the sensitizer absorbs the energy at this portion, and the absorbed energy can be contributed to the reaction start of the first polymerization initiator or the second polymerization initiator. Therefore, according to this invention, the photosensitive resin composition for colored layer formation can fully be hardened to the board | substrate side, and it becomes possible to form a colored layer with favorable adhesiveness with a board | substrate.

In general, the photosensitive resin composition for forming a colored layer used when forming the green colored layer has low curability, but in this embodiment, the maximum absorption wavelength different from that of the first polymerization initiator is used. Since the 2nd polymerization initiator which has is used, it becomes possible to harden the photosensitive resin composition for colored layer formation using the energy in a wavelength range over a wider range. Therefore, it can be set as the photosensitive resin composition for colored layer formation which can form a colored layer with favorable adhesiveness with a board | substrate and favorable curability.
Hereinafter, each material contained in the photosensitive resin composition for forming a colored layer of this embodiment will be described in detail.

(Sensitizer)
First, the sensitizer used in this embodiment will be described. The sensitizer used in this embodiment absorbs irradiated energy when the photosensitive resin composition for forming a colored layer is applied onto a substrate and exposed to light, and the absorbed energy is described below. There is no particular limitation as long as it can contribute to the initiation of the reaction of the polymerization initiator or the second polymerization initiator.

  The sensitizer used in this embodiment has a maximum absorption wavelength in the range of 340 nm to 420 nm, and has a maximum absorption wavelength in the range of 340 nm to 410 nm, particularly in the range of 340 nm to 400 nm. It is preferable. This is because it is possible to efficiently absorb energy irradiated from an exposure apparatus generally used in forming the colored layer. In addition, the energy in the wavelength region has a property of easily reaching the substrate side of the colored layer forming photosensitive resin composition without being scattered on the surface of the colored layer forming photosensitive resin composition. Therefore, by making the sensitizer have the maximum absorption wavelength in the wavelength region described above, the photosensitive resin composition for forming a colored layer can be sufficiently cured to the substrate side during exposure, Adhesion between the formed colored layer and the substrate can be improved. In addition, the said maximum absorption wavelength is a value measured using the apparatus mentioned above.

  At this time, the extinction coefficient at the maximum absorption wavelength is 80000 ml / g · cm or more, preferably 90000 ml / g · cm or more, and particularly preferably 100000 ml / g · cm or more. This is because the sensitivity of the sensitizer at the maximum absorption wavelength can be improved. The extinction coefficient is also a value measured by the method described above.

  In this embodiment, the maximum absorption wavelength of the sensitizer is 40 nm or more larger than the maximum absorption wavelength of the first polymerization initiator described later, and is 40 nm to 120 nm or more, particularly 40 nm to 80 nm or more. It is preferable that This is because the sensitizer can absorb energy at a wavelength that is not absorbed by the first polymerization initiator and contribute to the reaction start of the first polymerization initiator or the second polymerization initiator. Further, the energy on the long wavelength side can easily reach the substrate side of the photosensitive resin composition for forming the colored layer without being scattered on the surface of the photosensitive resin composition for forming the colored layer, as compared with the energy on the short wavelength side. There is a nature. Therefore, by setting the maximum absorption wavelength of the sensitizer to be larger than the maximum absorption wavelength of the first polymerization initiator, the sensitizer can easily exhibit curing on the substrate side. Thus, when the photosensitive resin composition for forming a colored layer is exposed, the photosensitive resin composition for forming a colored layer can be sufficiently cured to the substrate side. This is because the adhesion can be improved.

  The sensitizer is a sum of the contents of the sensitizer contained in the photosensitive resin composition for forming a colored layer, and the contents of a first polymerization initiator and a second polymerization initiator described later. Is added so as to be in the range of 4% by mass to 9% by mass with respect to the solid content of the photosensitive resin composition for forming the colored layer, and in particular in the range of 4% by mass to 8% by mass, particularly 5% by mass. It is preferable to add so that it may become in the range of -8 mass%. Thereby, the sensitivity to the energy of the photosensitive resin composition for forming the colored layer can be lowered, and even when the energy irradiated through the photomask or the like is diffracted when forming the colored layer, This is because the influence can be reduced.

  At this time, the mass ratio of the first polymerization initiator and the second polymerization initiator and the sensitizer contained in the colored layer forming photosensitive resin composition is as follows. 2 When the sum of the masses of the polymerization initiators is 1, the mass of the sensitizer is in the range of 0.05 to 0.45, particularly in the range of 0.05 to 0.3, particularly 0.1 to 0. Is preferably in the range of .30. This is because by using the sensitizer, the first polymerization initiator, and the second polymerization initiator at such a ratio, the adhesion of the formed colored layer can be improved.

  In addition, as specific content of the said sensitizer, it is 0.2 mass% in the range of 0.2 mass%-2.7 mass% in solid content of the photosensitive resin composition for colored layer formation. It is preferable to be within a range of ˜2.3 mass%, particularly within a range of 0.4 mass% to 2.3 mass%. This is because when the content of the sensitizer is within the above range, the adhesion between the formed colored layer and the substrate can be improved.

  Moreover, since it can be made to be the same as that of the sensitizer used by the 1st embodiment mentioned above about the kind etc. of the said sensitizer used for this embodiment, detailed description here is abbreviate | omitted.

(First polymerization initiator)
Next, the 1st polymerization initiator used for this embodiment is explained. The first polymerization initiator used in this embodiment has a maximum absorption wavelength that is smaller than the above-described value than the maximum absorption wavelength of the sensitizer described above, and can contribute to the initiation of polymerization of the binder component. Although not particularly limited, the first polymerization initiator preferably has a maximum absorption wavelength in a wavelength range of 260 nm to 310 nm, particularly in a range of 280 nm to 310 nm. This is because the colored layer forming polymerization initiator is less likely to be colored by the addition of the first polymerization initiator.

At this time, the extinction coefficient at the maximum absorption wavelength of the first polymerization initiator is preferably 40000 ml / g · cm or more, particularly preferably 50000 ml / g · cm or more. This is because when the absorption coefficient at the maximum absorption wavelength of the first polymerization initiator is equal to or greater than the above value, energy can be efficiently absorbed at the maximum absorption wavelength.

  In addition, as described above, the first polymerization initiator includes the sum of the contents of the first polymerization initiator and the second polymerization initiator and the content of the sensitizer in the photosensitive resin composition for forming a colored layer. And the sum of the contents of the first polymerization initiator, the second polymerization initiator, and the sensitizer is predetermined with respect to the solid content of the photosensitive resin composition for forming a colored layer. It is contained so that it may become in the range. Specifically as content of the 1st polymerization initiator in this embodiment, it is in the range of 1 mass%-7.2 mass% in solid content of the photosensitive resin composition for colored layer formation, Especially 1.5 mass. It is preferable that it is contained in the range of% to 6.5% by mass, particularly in the range of 2% to 6.5% by mass.

  In addition, about the kind etc. of the 1st polymerization initiator used for this embodiment, since it can be made to be the same as that of the polymerization initiator used by the 1st embodiment mentioned above, detailed description here is abbreviate | omitted.

(Second polymerization initiator)
Next, the 2nd polymerization initiator contained in the photosensitive resin composition for colored layer formation of this embodiment is demonstrated. The second polymerization initiator used in this embodiment can contribute to the initiation of polymerization of the binder component, and has a maximum absorption wavelength in the wavelength range of 315 nm to 335 nm, preferably in the range of 315 nm to 330 nm. If it has, it will not specifically limit. The absorption wavelength is a value measured by the method described above. At this time, the extinction coefficient at the maximum absorption wavelength is preferably 40000 ml / g · cm or more, particularly preferably 50000 ml / g · cm or more. This is because energy can be efficiently absorbed at the maximum absorption wavelength and contribute to the initiation of polymerization of the binder component. The absorption wavelength is also a value measured by the method described above.

  As such a second polymerization initiator, for example, an acetophenone-based polymerization initiator can be mentioned.

The polymerization initiator represented by these can be mentioned. _Wherein, R 1, _{R 2,} the phenyl group _{(R 5} which are respectively substituted by an alkyl group or _{R 5} having 1 to 5 carbon atoms, represents hydrogen, or an alkyl group having 1 to 5 carbon atoms .), R ₃ and R ₄ each represent hydrogen or an alkyl group having 1 to 8 carbon atoms, and may be the same or different. Ar represents a phenyl group substituted by 4-position with a morpholino group.

  As such a second polymerization initiator, specifically, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone, 2-ethylbenzyl-2-dimethylamino-1- (4 -Morpholinophenyl) -butanone, 2-methylbenzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone, 2-benzyl-2-diethylamino-1- (4-morpholinophenyl) -butanone, Examples include 2-cyclohexyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone and 2-propyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone.

  In addition, as described above, the second polymerization initiator includes the sum of the contents of the first polymerization initiator and the second polymerization initiator and the content of the sensitizer in the photosensitive resin composition for forming a colored layer. And the sum of the contents of the first polymerization initiator, the second polymerization initiator, and the sensitizer is predetermined with respect to the solid content of the photosensitive resin composition for forming a colored layer. It is contained so that it may become in the range. Specifically as content of the 2nd polymerization initiator in this embodiment, it is 0.35 mass% in the range of 0.3 mass%-4 mass% in solid content of the photosensitive resin composition for colored layer formation. It is preferable to be within a range of from 3% to 3% by mass, particularly within a range of from 0.7% to 3% by mass.

(Binder component)
The binder component used in this embodiment plays a role as a binder in the formed colored layer, and is not particularly limited as long as it has good adhesion to the substrate.

  Such a binder component is preferably contained in the range of 5% by mass to 60% by mass, particularly in the range of 10% by mass to 50% by mass, in the solid content of the photosensitive resin composition for forming a colored layer. . This is because when the content of the binder component is less than the above range, the adhesion between the formed colored layer and the substrate tends to be inferior.

  In addition, about the kind etc. of the binder component used for this embodiment, since it can be made to be the same as that used for the 1st embodiment mentioned above, description here is abbreviate | omitted.

(Pigment)
Next, the pigment used in this embodiment will be described. The pigment used in this embodiment is not particularly limited as long as it is a pigment that can be colored to the target color of the photosensitive resin composition for forming a colored layer, and is a pigment that is used for forming a general colored layer. And can be similar.

  In this embodiment, such a pigment is contained in the solid content of the colored resin composition for forming a colored layer in the range of 25% by mass to 75% by mass, particularly in the range of 25% by mass to 60% by mass. It is preferable.

  Examples of such pigments include PG (Pigment Green) 7, 10, 36, PY (Pigment Yellow) 138, 83, 139, 150, and the like. In addition, you may use these pigments 1 type or in combination of 2 or more types.

(Photosensitive resin composition for forming colored layer)
The photosensitive resin composition for forming a colored layer in this embodiment is particularly limited as long as it contains the sensitizer, the first polymerization initiator, the second polymerization initiator, the binder component, and the pigment described above. Instead, it may contain a solvent, an adhesion aid, various adjusting agents and the like as needed.

  In this embodiment, it is particularly preferable to use an adhesion assistant in order to improve the adhesion between the formed colored layer and the substrate. Such an adhesion assistant can be the same as that used in the first embodiment described above, and a detailed description thereof will be omitted here.

  Here, the photosensitive resin composition for forming a colored layer of the present embodiment is also used when forming a colored layer using a photolithography method, and particularly has a hole in the reflected light region. It is preferably used for forming a colored layer of a color filter for a transflective liquid crystal display device, forming a colored layer of an array substrate with a color filter, or the like.

  In this embodiment, the sensitizer having an absorption wavelength different from that of the sensitizer described above, or the polymerization initiator having an absorption wavelength different from that of the first polymerization initiator or the second polymerization initiator described above is a colored layer. You may contain in the photosensitive resin composition for formation. Even in this case, the content of all the sensitizers contained in the photosensitive resin composition for forming the colored layer and all the polymerization initiators contained in the photosensitive resin composition for forming the colored layer. The sum of the contents is in the range of 4% by mass to 17% by mass, particularly in the range of 6% by mass to 17% by mass, particularly in the range of 6% by mass to 15% with respect to the solid content of the photosensitive resin composition for forming the colored layer. It is preferable to be within the range of mass%.

  The light source used when exposing the colored layer forming photosensitive resin composition can be the same as that described in the first embodiment, and therefore detailed description thereof is omitted here. .

B. Next, a method for producing a color filter of the present invention will be described. The method for producing a color filter of the present invention includes a colored layer forming step of forming a colored layer having pores by a photolithography method using the photosensitive resin composition for forming a colored layer described above. It is what.

  In the method for producing a color filter of the present invention, for example, as shown in FIG. 1, a colored layer forming photosensitive resin composition 10 is applied onto a substrate 1 (FIG. 1 (a)), and this colored layer forming photosensitive material is applied. The photosensitive resin composition 10 is exposed by irradiating energy 6 using, for example, a photomask 5 or the like provided with the shielding part 3 and the opening 4 (FIG. 1B), and the hole part is obtained by developing. A colored layer 2 having a is formed (FIG. 1 (c)).

  In the present invention, since a colored layer having pores is formed by photolithography using the photosensitive resin composition for forming a colored layer, for example, when energy diffraction occurs during the exposure, for example. Even so, it can be made less susceptible to that effect. Therefore, it is possible to obtain a high-definition color filter in which holes are formed in a fine pattern in the colored layer.

  Moreover, in this invention, the adhesiveness of a colored layer and a board | substrate can be made favorable by forming the colored layer which has a hole using the said photosensitive resin composition for colored layer formation. There are also advantages. Hereinafter, the colored layer forming step in the method for producing a color filter of the present invention will be described in detail.

1. Colored layer forming step The colored layer forming step of the present invention is performed by a photolithography method using the photosensitive resin composition for forming a colored layer, and the method includes forming a hole in the colored layer. There is no particular limitation as long as the method is possible. In the present invention, for example, a photosensitive resin composition for forming a colored layer is applied on a substrate, and the photosensitive resin composition for forming a colored layer is used with a photomask provided with an opening and a shielding portion. Thus, a method of forming a colored layer having pores by performing exposure and developing by irradiating energy can be employed.

  The method for applying the photosensitive resin composition for forming a colored layer in such a method is not particularly limited as long as the method can apply the photosensitive resin composition for forming a colored layer on the substrate. Instead, the coating can be performed by a known coating method such as spin coating, spray coating, dip coating, roll coating, bead coating, or bar coating.

  The exposure in this step can be performed by irradiating energy using, for example, a photomask provided with an opening and a shield. The light source used for the exposure can be the same as the light source generally used for forming the colored layer, but in particular, an ultra-high pressure mercury lamp, a low-pressure mercury lamp, a metal halide lamp, etc. A lamp having a high emission line in the ultraviolet part is preferably used. This is because the characteristics of the colored layer forming photosensitive resin composition can be further exhibited.

  In addition, as a method for developing the photosensitive resin composition for forming a colored layer, the method is particularly limited as long as unnecessary portions of the photosensitive resin composition for forming a colored layer can be removed. Instead, it can be the same as the developing method performed in the production of a general color filter. Here, for example, by optimizing the type of the developing solution, the concentration of the developing solution, the pressure of the developing solution or the washing water, and the like, the hole can be formed in a finer pattern.

  Here, in the present invention, the colored layer is formed so as to have a hole, but the shape and area of the hole are adapted to the type and use of the color filter manufactured according to the present invention. It is selected appropriately. For example, the shape of the hole may be rectangular or circular. Any other shape may be used. In the present invention, the width of such a hole is preferably in the range of 5 μm to 15 μm, and more preferably in the range of 5 μm to 13 μm. This is because by setting the width of the hole within such a range, the fine hole can be formed in the colored layer without the hole being crushed. The width of the hole means a short diameter when the shape of the hole is circular or elliptical, and faces when the shape of the hole is rectangular or other shapes. The length of the portion where the distance from the side and / or corner is the shortest is said.

  The substrate used in this step can be the same as that used for a general color filter. In the formation of the red colored layer and the blue colored layer, the photosensitive resin composition for forming a colored layer described in the first embodiment of “A. Photosensitive resin composition for forming a colored layer” described above is used. When the green colored layer is used, the colored layer forming photosensitive resin composition described in the second embodiment of “A. Photosensitive resin composition for forming colored layer” described above is used. .

b. Other Steps In the method for producing a color filter in the present invention, there is no particular limitation as long as it has the colored layer forming step. For example, a light shielding portion forming step for forming a light shielding portion, If necessary, other steps may be included such as a step of forming an overcoat layer.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

  The following examples illustrate the present invention more specifically.

[Example 1]
<Preparation of photosensitive resin composition for forming colored layer (for red colored layer)>
In accordance with the formulation shown below, a photosensitive resin composition for forming a colored layer (for a red colored layer) was prepared.
-Monomer: 20 parts by weight of dipentaerythritol hexaacrylate-Polymer: Copolymer of styrene, methacrylic acid and isobutyl methacrylic acid
30 parts by weight / polymerization initiator: Irg907 (manufactured by Ciba Specialty Chemicals)
16.73 parts by weight-Sensitizer: Hycure ABP (manufactured by Kawaguchi Pharmaceutical Co., Ltd.) 0.88 parts by weight-Pigment: PR254 dispersion (solvent: propylene glycol monomethyl ether acetate, solid content 30%) 120 parts by weight-solvent : Propylene glycol monomethyl ether acetate 350 parts by weight <Formation of colored layer>
As a transparent substrate, the above-mentioned photosensitive resin composition for forming a colored layer was applied onto a 0.63 mm thick glass substrate (Corning 1737 glass), dried by heating on a hot plate. Then, after exposing through a photomask having a shielding part having a width of 12 μm, development and baking were performed to form a red colored layer.

[Examples 2 to 20]
A photosensitive resin composition for forming a colored layer (for a red colored layer) was prepared in the same manner as in Example 1 except that the polymerization initiator and the sensitizer were blended as shown in Table 1 below. A layer was formed.

[Comparative Examples 1 to 20]
A photosensitive resin composition for forming a colored layer (for a red colored layer) was prepared in the same manner as in Example 1 except that the polymerization initiator and the sensitizer were blended as shown in Table 1 below. A layer was formed.

[Evaluation]
The results of observing the pattern of the red colored layer formed in a fine pattern in Examples 1 to 20 and Comparative Examples 1 to 20 described above with a scanning electron microscope (SEM) are shown in Table 1 below. In addition, when the pattern of the red colored layer is peeled off and cannot be observed, or when the hole formed in the red colored layer is crushed, it is indicated by “x”, and the width of the hole formed in the red colored layer is Those of 13 μm or less are indicated by “◯”.

  From the results of Table 1, it was confirmed that fine pores having a width of 13 μm or less can be formed in the red colored layer by using the photosensitive resin composition for forming a colored layer prepared in Examples 1 to 20.

[Example 21]
A photosensitive resin composition for forming a colored layer (blue colored layer) in the same manner as in Example 1, except that the pigment to be blended was a PB15: 6 dispersion (solvent: propylene glycol monomethyl ether acetate, solid content 30%). For). Using this, a blue colored layer was formed in the same manner as in Example 1.

[Examples 22 to 40]
A colored layer-forming photosensitive resin composition (for blue colored layer) was prepared in the same manner as in Example 21 except that the polymerization initiator and the sensitizer were blended as shown in Table 2 below. A layer was formed.

[Comparative Examples 21-40]
A colored layer-forming photosensitive resin composition (for blue colored layer) was prepared in the same manner as in Example 21 except that the polymerization initiator and the sensitizer were blended as shown in Table 2 below. A layer was formed.

[Evaluation]
Table 2 below shows the results of observing the pattern of the blue colored layer formed in a fine pattern in Examples 21 to 40 and Comparative Examples 21 to 40 with a scanning electron microscope (SEM). In addition, when the pattern of the blue colored layer is peeled off and cannot be observed, or when the hole formed in the blue colored layer is crushed, it is indicated by “x”, and the width of the hole formed in the blue colored layer is Those of 13 μm or less are indicated by “◯”.

  From the results in Table 2, it was confirmed that fine pores having a width of 13 μm or less can be formed in the blue colored layer by using the photosensitive resin composition for forming a colored layer prepared in Examples 21 to 40.

[Example 41]
<Preparation of photosensitive resin composition for forming colored layer (for green colored layer)>
According to the formulation shown below, a photosensitive resin composition for forming a colored layer (for a green colored layer) was prepared.
-Monomer: 20 parts by weight of dipentaerythritol hexaacrylate-Polymer: Copolymer of styrene, methacrylic acid and isobutyl methacrylic acid
30 parts by weight-first polymerization initiator: Irg907 (manufactured by Ciba Specialty Chemicals) and second polymerization initiator: Irg 369 (manufactured by Ciba Specialty Chemicals)
10.34 parts by weight-Sensitizer: Hycure ABP (manufactured by Kawaguchi Pharmaceutical Co., Ltd.) 0.54 parts by weight-Pigment: PG36 / PG7 / PY138 dispersion (solvent: propylene glycol monomethyl ether acetate, solid content 30%) 200 parts by weight / solvent: 350 parts by weight of propylene glycol monomethyl ether acetate <Formation of colored layer>
A green colored layer was obtained using the same method as in Example 1.

[Examples 42 to 56]
A photosensitive resin composition for forming a colored layer (green colored layer) as in Example 41 except that the blending of the first polymerization initiator, the second polymerization initiator, and the sensitizer was as shown in Table 3 below. Was prepared to form a green colored layer.

[Comparative Examples 41-60]
A photosensitive resin composition for forming a colored layer (green colored layer) as in Example 41 except that the blending of the first polymerization initiator, the second polymerization initiator, and the sensitizer was as shown in Table 3 below. Was prepared to form a green colored layer.

[Evaluation]
Table 3 shows the results of observing the pattern of the green colored layer formed in a fine pattern in Examples 41 to 56 and Comparative Examples 41 to 60 with a scanning electron microscope (SEM). In addition, when the pattern of the green colored layer is peeled off and cannot be observed, or when the hole formed in the green colored layer is crushed, it is indicated by “x”, and the width of the hole formed in the green colored layer is Those of 13 μm or less are indicated by “◯”.

  From the results of Table 3, it was confirmed that by using the photosensitive resin composition for forming a colored layer prepared in Examples 41 to 56, fine pores having a width of 13 μm or less can be formed in the green colored layer.

It is process drawing explaining the manufacturing method of the color filter of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Board | substrate 2 ... Colored layer 3 ... Shielding part 4 ... Opening part 5 ... Photomask 6 ... Energy 10 ... Photosensitive resin composition for colored layer formation a ... Hole

Claims (2)

It contains a pigment, a first polymerization initiator, a second polymerization initiator, a sensitizer, and a binder component, and is used when forming a green colored layer.
The sensitizer has a maximum absorption wavelength in a wavelength region within a range of 340 nm to 420 nm, and an extinction coefficient at the maximum absorption wavelength of the sensitizer is 80000 ml / g · cm or more,
The maximum absorption wavelength of the sensitizer is 40 nm or more larger than the maximum absorption wavelength of the first polymerization initiator,
The second polymerization initiator has a maximum absorption wavelength in a wavelength region within a range of 315 nm to 335 nm,
The sum of the contents of the sensitizer, the first polymerization initiator, and the second polymerization initiator is 4% by mass to 9% by mass with respect to the solid content of the colored layer forming photosensitive resin composition. Is in range,
When the sum of the masses of the first polymerization initiator and the second polymerization initiator contained in the colored layer forming photosensitive resin composition is 1, it is contained in the colored layer forming photosensitive resin composition. mass of the sensitizer had use a colored layer forming photosensitive resin composition is in the range of 0.05 to 0.45 that,
A method for producing a color filter, comprising a colored layer forming step of forming a colored layer having a hole having a width in the range of 5 to 13 μm by a photolithography method. The sensitizer has a maximum absorption wavelength in a wavelength region within a range of 340 nm to 400 nm, and an absorption coefficient of the maximum absorption wavelength of the sensitizer is 80000 ml / g · cm or more. Item 2. A method for producing a color filter according to Item 1 .

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