Black photosensitive resin composition, color filter, and display device

Abstract

The present application provides a black photosensitive resin composition, a color filter including a black matrix manufactured using the black photosensitive resin composition, and a display device including the color filter. The black photosensitive resin composition includes a colorant including a specific pigment, an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator, and a solvent, and can form a coating film that can exhibit a transmittance of 90% or more in a specific wavelength region. The color filter including the black matrix manufactured using the black photosensitive resin composition and the display device including the color filter have excellent reliability, durability, and the like, and can effectively improve the effect of black color vision perception.

Description

Technical Field

[0001] This invention relates to a black photosensitive resin composition, a color filter, and a display device. More specifically, it relates to a black photosensitive resin composition, a color filter comprising a black matrix manufactured using the black photosensitive resin composition, and a display device comprising the aforementioned color filter. Background Technology

[0002] The color filter consists of three primary color pixels: red, green, and blue, as well as a black matrix formed at the boundaries of each color pixel, which is black and essentially does not transmit visible light.

[0003] When a black photosensitive resin composition is used in a color filter for a display device or monitor, a light-shielding layer utilizing the black photosensitive resin composition is formed at the boundary portion between the colored layers to improve the contrast and color rendering effect of red, green, and blue.

[0004] On the other hand, glass substrates have traditionally been used as display substrates. When using glass substrates, high-temperature curing is possible. However, when using flexible substrates such as polymers or polymer compounds, especially when using substrates with an organic layer at the bottom, high-temperature curing is not possible. Furthermore, when using conventional photosensitive resin compositions and forming a black matrix through low-temperature curing, deep curing cannot be achieved, leading to a decrease in the reliability of displays containing such materials.

[0005] Korean Patent Registration No. 10-2005682 discloses a photosensitive resin composition for pattern forming containing a black matrix. However, the photosensitive resin composition disclosed in the aforementioned patent document is difficult to cure at low temperatures below 100°C, thus it cannot be used when forming patterns on flexible substrates made of polymers, especially substrates with an organic layer in the lower layer.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Korean Patent Registration No. 10-2005682 Summary of the Invention

[0009] The problem to be solved

[0010] The present invention addresses the problems of the prior art described above, and its objective is to provide a black photosensitive resin composition that can be cured at low temperatures below 100°C and exhibits excellent reliability and spectrophotometric properties.

[0011] Furthermore, the objective of this invention is to provide a color filter comprising a black matrix manufactured using the aforementioned black photosensitive resin composition, and a display device comprising the aforementioned color filter.

[0012] However, the problems to be solved by this application are not limited to those mentioned above, and those skilled in the art should be able to clearly understand other problems not mentioned based on the following description.

[0013] Methods for solving problems

[0014] To address the aforementioned issues, the present invention provides a black photosensitive resin composition comprising a colorant, an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator, and a solvent. The colorant comprises one or more pigments selected from inorganic black pigments and organic black pigments, as well as an organic coloring pigment. The coating film formed using the above-mentioned black photosensitive resin composition has a transmittance (T%) of 90% or more at a wavelength of 900 nm with a thickness of 1.5 μm as a reference.

[0015] Furthermore, the present invention provides a color filter comprising a black matrix manufactured using the aforementioned black photosensitive resin composition.

[0016] Furthermore, the present invention provides a display device comprising the aforementioned color filter.

[0017] Invention Effects

[0018] If the black photosensitive resin composition of the present invention is used, the transmittance in a specific wavelength band is satisfied, thereby satisfying the reflectance and reflected color perception, and a coating film with excellent spectral dispersive properties can be formed. Therefore, when a color filter containing the above-mentioned coating film is applied to a display device, the external black visual perception can be improved.

[0019] Furthermore, the black photosensitive resin composition of the present invention can be cured at low temperatures below 100°C, thereby exhibiting excellent curing degree not only on glass substrates but also on flexible substrates, and providing excellent reliability effects such as solvent resistance.

[0020] Therefore, the color filter comprising a black matrix manufactured using the aforementioned black photosensitive resin composition, and the display device comprising the aforementioned color filter, have excellent reliability, durability, and other properties, and can effectively improve the visual perception of black. Attached Figure Description

[0021] Figure 1 This is a diagram illustrating the evaluation criteria used to evaluate the surface condition of experimental examples of the present invention after impregnation. Detailed Implementation

[0022] The present invention relates to a black photosensitive resin composition, a color filter comprising a black matrix manufactured therefrom, and a display device comprising the aforementioned color filter. The black photosensitive resin composition is characterized in that it comprises a colorant containing a specific pigment, an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator, and a solvent. Based on a thickness of 1.5 μm, the coating film formed using the aforementioned black photosensitive resin composition can exhibit a transmittance of more than 90% in a specific wavelength range.

[0023] In particular, the coating formed using the black photosensitive resin composition of the present invention has a long wavelength (near-infrared) transmittance (T%) of 900 nm or more, thus enabling it to function as a proximity sensor. If near-infrared transmission is ensured while the entire panel is perceived as black, the proximity sensor can be made invisible on the surface.

[0024] In this invention, the aforementioned proximity sensor means a sensor that can sense the presence of surrounding objects without physical contact.

[0025] Furthermore, the long-wavelength (near-infrared) reflectivity and reflected color perception of the aforementioned coating are reduced, thereby improving the external black visual perception of display devices using color filters incorporating the aforementioned coating. Here, "black visual perception" refers to the appearance of black when the display device is off.

[0026] According to the present invention, the reflectance in the long wavelength (near infrared) of 900 nm is 4.7 or less, preferably 4.65 or less, and the reflectance color sensitivity a* and b* are 0.85 or less and 0.05 or less, respectively.

[0027] The a* value above indicates the degree to which light, when transmitted, leans towards either red or green within the CIE color space. This represents the color value in the CIE coordinate system; a positive (+) value means closer to red, and a negative (-) value means closer to green. Similarly, the b* value above indicates the degree to which light, when transmitted, leans towards either yellow or blue within the CIE color space. This represents the color value in the CIE coordinate system; a positive (+) value means closer to yellow, and a negative (-) value means closer to blue.

[0028] The coating formed using the black photosensitive resin composition of the present invention satisfies the conditions that the reflectance in the long wavelength (near infrared) of 900 nm is 4.7 or less, more preferably 4.65 or less, and the reflected color sense a* and b* are 0.85 or less and 0.05 or less, respectively, thus approaching the black color sense, and therefore can display a significantly improved black visual perception on the entire panel.

[0029] The black photosensitive resin composition of the present invention can form a coating with an optical density (OD) of 1.7 / μm or more when the thickness is 1.5 μm. The coating can block light from parts other than the pixel portion and prevent color mixing of light from adjacent pixel portions.

[0030] Furthermore, the black photosensitive resin composition of the present invention can be cured at low temperatures below 100°C. For example, low-temperature curing at 100°C or below, preferably 70°C or above and 100°C or below, and more preferably 80°C or above and 100°C or below, can be achieved.

[0031] The black photosensitive resin composition of the present invention can be cured at low temperatures, so it can be used not only on glass substrates, but also on flexible substrates such as polymers or substrates containing organic layers to form black matrix patterns. Furthermore, the curing film has excellent deep curing degree, i.e., photocuring degree, and can provide excellent reliability effects such as solvent resistance.

[0032] Therefore, the color filter comprising a black matrix manufactured using the black photosensitive resin composition of the present invention and the display device comprising the above-mentioned color filter have excellent reliability, durability, etc., and can effectively improve the black visual perception.

[0033] The black photosensitive resin composition of the present invention will be described in detail below.

[0034] <Black Photosensitive Resin Composition>

[0035] The black photosensitive resin composition of the present invention may contain (A) a colorant, (B) an alkali-soluble resin, (C) a photopolymerizable compound, (D) a photopolymerization initiator, and (E) a solvent, and may additionally contain an epoxy compound and / or additives as needed.

[0036] (A) Coloring agent

[0037] In this invention, (A) the colorant may include pigments that have the property of blocking visible light and organic coloring pigments.

[0038] As for the aforementioned pigments that have the property of blocking visible light, for example, organic black pigments, inorganic black pigments, or a mixture of organic black pigments and inorganic black pigments can be used.

[0039] The aforementioned organic black pigment may include one or more selected from the group consisting of lactam black, aniline black, and perylene black. Considering the long-wavelength transmittance of near-infrared light, lactam black is preferred.

[0040] By including the aforementioned organic black pigment, it is possible to increase optical density without affecting the infrared region, and also to improve dielectric constant and transmittance.

[0041] The aforementioned inorganic black pigment may be one or more selected from the group consisting of carbon black, chromium oxide, iron oxide, and titanium black, preferably including carbon black.

[0042] In the aforementioned colorant, the content of the pigment that has the property of blocking visible light, relative to the total weight of the black photosensitive resin composition, can be 25-50% by weight, preferably 30-48% by weight. When the pigment content is less than the above-mentioned content, the transmittance of visible light (450nm-600nm) becomes higher, which may lead to color mixing between pixels. Furthermore, when the pigment content is greater than the above-mentioned content range, the transmittance of light in the wavelength band above 900nm may become lower, which may cause problems such as undercut due to insufficient deep curing.

[0043] Organic coloring pigments can be red, green and blue organic pigments commonly used in the art, with preference given to red organic pigments that have relatively good transmittance at short wavelengths (365 nm).

[0044] As organic pigments that are red, examples include compounds classified as red pigments in the Color Index (published by the Society of Dyers and Colourists). More specifically, examples include CI Pigment Red 179, 264, 269, etc., but this is not a limitation.

[0045] As the aforementioned red organic pigment, considering the reflective color perception (a* and b*), it is preferable to include any one or more of CI Pigment Red 179, 264 and 269.

[0046] In the aforementioned colorant, the content of the aforementioned organic colorant relative to the total weight of the black photosensitive resin composition is 7 to 15% by weight, preferably 8 to 15% by weight, and more preferably 9 to 14% by weight. When the content of the aforementioned organic colorant is within the aforementioned range, it is preferred from the perspective of spectral characteristics (OD, reflectance, and reflected color perception).

[0047] In this invention, the content of the colorant contained in the black photosensitive resin composition is 35-65% by weight, preferably 40-60% by weight, and more preferably 40-60% by weight, in the total weight of the black photosensitive resin composition. When the content of the organic colorant is within the above-mentioned range, it is preferred from the perspective of spectral characteristics (OD, reflectance, and reflected color perception).

[0048] In this invention, the total weight of solid components in the black photosensitive resin composition means the total weight of the remaining components of the black photosensitive resin composition excluding the solvent.

[0049] Furthermore, the aforementioned colorant is preferably used after being prepared into a pigment dispersion in which the pigment particle size is uniformly dispersed. Examples of methods for uniformly dispersing pigment particles include methods such as adding a pigment dispersant for dispersion treatment; by such methods, a pigment dispersion in which the pigment is uniformly dispersed in the solution can be obtained.

[0050] The aforementioned pigment dispersants are added to deagglomerate pigments and maintain their stability. Specific examples of pigment dispersants include cationic, anionic, nonionic, amphoteric, polyester, and polyamine surfactants; acrylate dispersants, including butyl methacrylate (BMA) or N,N-dimethylaminoethyl methacrylate (DMAEMA); or other known resin-type pigment dispersants; etc. They can be used individually or in combination of two or more.

[0051] The content of the pigment dispersant is greater than 0 and less than 1 part by weight relative to 1 part by weight of the colorant, more preferably 0.01 to 0.5 parts by weight. If the pigment dispersant is included in the amount greater than 0 and less than 1 part by weight, a uniformly dispersed pigment can be obtained, which is therefore preferred.

[0052] (B) Alkali-soluble resin

[0053] Alkali-soluble resins can typically make the non-exposed portions of a black photosensitive resin layer formed using a photosensitive resin composition alkali-soluble, and also act as a dispersion medium for pigments.

[0054] In this invention, the alkali-soluble resin can be selected from a variety of polymers used in this technical field.

[0055] For example, the black photosensitive resin composition of the present invention may contain one or more of epoxy-containing copolymers and copolymers containing terminated isocyanate groups.

[0056] As the above-mentioned epoxy-containing copolymer, it can be selected from a variety of polymers used in this technical field, but it is preferred to be a compound represented by the following chemical formula 1.

[0057] [Chemical Formula 1]

[0058]

[0059] In the above chemical formula 1,

[0060] R1 and R2 are each independently hydrogen or CH3, preferably hydrogen.

[0061] a and b are each independent integers from 3 to 20, preferably integers from 5 to 15.

[0062] The above-mentioned epoxy-containing copolymers can be made by including one or more 3,4-epoxy tricyclic compounds [5.2.1.0]. 2,6 It is a copolymer of a monomer of a decane ring compound and one or more monomers that are unsaturated carboxylic acids or their anhydrides.

[0063] The above contains 3,4-epoxy tricyclic [5.2.1.0] 2,6 Compounds with a decane ring include 3,4-epoxytricyclic rings [5.2.1.0]. 2,6 ] Decane-9-yl acrylate, 3,4-epoxy tricyclic [5.2.1.0] 2,6 Decane-8-yl acrylate, acrylic acid, etc., preferably 3,4-epoxy tricyclic [5.2.1.0] 2,6 ] Decane-9-yl acrylate and 3,4-epoxy tricyclic [5.2.1.0] 2,6 A mixture of decane-8-yl acrylates, more preferably the above-mentioned 3,4-epoxy tricyclo[5.2.1.0] 2,6 ] Decane-9-yl acrylate and 3,4-epoxy tricyclic [5.2.1.0] 2,6 Decane-8-yl acrylate is prepared by mixing in a volume ratio of 50:50.

[0064] The aforementioned carboxylic acid or its anhydride can be acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, citraconic acid, mesoconic acid, or other α,β-unsaturated carboxylic acids and their anhydrides (maleic anhydride, itaconic anhydride, etc.), preferably methacrylic acid.

[0065] As the above-mentioned epoxy-containing copolymer, when it contains the compound represented by the above chemical formula 1, it can have excellent reproducibility and reliability.

[0066] The aforementioned epoxy-containing copolymers have a weight-average molecular weight of 8,000–20,000 g / mol, preferably 10,000–15,000 g / mol, an acid value based on solids content of 50–130 mg KOH / g, preferably 65–120 mg KOH / g, and a dispersion (Mw / Mn) of 1.8–2.3, preferably 1.9–2.2. Accordingly, the developability for alkaline development can be improved, residue formation can be suppressed, and the adhesion of the pattern can be improved.

[0067] Furthermore, the alkali-soluble resin of the present invention can be used in combination with the copolymer containing capped isocyanate groups and the above-mentioned copolymer containing epoxy groups, or it can be used alone.

[0068] The aforementioned end-capped isocyanate group is a group that is temporarily deactivated by reacting with a thermally dissociative end-capping agent, which protects the isocyanate group. When heated to a predetermined temperature, the thermally dissociative end-capping agent dissociates to generate the isocyanate group. Here, "thermal dissociation" means that the end-capping agent bound to the isocyanate group dissociates due to heating.

[0069] There is no particular limitation on the dissociation temperature of the above-mentioned thermally dissociative end-capping agent. From the perspective of low-temperature thermosetting, it is preferably 40 to 300°C, and more preferably 60 to 200°C.

[0070] In one embodiment of the present invention, the aforementioned terminated isocyanate group may be derived from a compound represented by the following chemical formula 2. That is, the copolymer containing terminated isocyanate groups of the present invention may be polymerized using a compound represented by the following chemical formula 2 as a monomer.

[0071] [Chemical Formula 2]

[0072]

[0073] In the above chemical formula 2, D can be either =O or =CH2.

[0074] In the above chemical formula 2, Z can be acrylate, methacrylate or vinyl, preferably acrylate or methacrylate.

[0075] In the above chemical formula 2, L 1 It can be a straight-chain or branched alkylene group having 1 to 20 carbon atoms, preferably a straight-chain or branched alkylene group having 2 to 10 carbon atoms.

[0076] In the above chemical formula 2, BL represents a residue derived from the thermally dissociable end-capping agent. From the perspective of low-temperature thermosetting, the aforementioned thermally dissociable end-capping agent may contain one or more of the following: phenolic end-capping agents, lactam end-capping agents, active methylene end-capping agents, alcohol end-capping agents, oxime end-capping agents, thiol end-capping agents, acid amide end-capping agents, imide end-capping agents, amine end-capping agents, imidazole end-capping agents, imine end-capping agents, and pyrazole end-capping agents.

[0077] As a phenolic end-capping agent, there are no particular limitations; examples include phenol, cresol, xylenol, chlorophenol, ethylphenol, butylphenol, nonylphenol, dinonylphenol, styrene-modified phenol, and hydroxybenzoic acid esters.

[0078] As a lactam-based capping agent, there are no particular limitations; examples include ε-caprolactam, δ-valerolactam, γ-butyrolactam, and β-propiolactam.

[0079] As an active methylene-based capping agent, there are no particular limitations; examples include methyl acetoacetate, ethyl acetoacetate, acetylacetone, dimethyl malonate, and diethyl malonate.

[0080] As an alcohol-based end-capping agent, there are no particular limitations, and examples include methanol, ethanol, propanol, butanol, 2-ethyl-1-hexanol, 2-methoxyethanol, 2-ethoxyethanol, 2-butoxyethanol, pentanol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, propylene glycol monomethyl ether, benzyl ether, methyl glycolate, butyl glycolate, diacetone alcohol, methyl lactate, and ethyl lactate, etc.

[0081] There are no particular limitations on oxime-based capping agents; examples include formaldehyde oxime, acetaldehyde oxime, acetyl oxime, methyl ethyl ketone oxime, diacetyl monooxime, and cyclohexanone oxime.

[0082] As a thiol-based end-capping agent, there are no particular limitations; examples include butyl thiol, hexyl thiol, tert-butyl thiol, thiophene, methyl thiophene, and ethyl thiophene.

[0083] As an acid amide-based end-capping agent, there are no particular limitations; examples include acetamide and benzoic acid amide.

[0084] As an imide-based capping agent, there are no particular limitations; examples include succinic imide and maleic imide.

[0085] As an amine-based end-capping agent, there are no particular limitations; examples include xyleneamine, aniline, butylamine, dibutylamine, diphenylamine, carbazole, di-n-propylamine, diisopropylamine, and isopropylethylamine.

[0086] As an imidazole-based capping agent, there are no particular limitations; examples include imidazole and 2-ethylimidazole.

[0087] As an imine-based end-capping agent, there are no particular limitations; examples include methyleneimine and propyleneimine.

[0088] There are no particular limitations on pyrazole-based end-capping agents; examples include pyrazole, 3-methylpyrazole, and 3,5-dimethylpyrazole.

[0089] The copolymers containing the above-mentioned isocyanate-terminated groups can be polymerized by including an ethylene unsaturated monomer (b1) with a carboxyl group.

[0090] (b1) Ethylene unsaturated monomers with carboxyl groups

[0091] Specific examples of the aforementioned vinyl unsaturated monomers having carboxyl groups include monocarboxylic acids such as acrylic acid, methacrylic acid, and crotonic acid; dicarboxylic acids such as fumaric acid, medaconic acid, and itaconic acid; and anhydrides of these dicarboxylic acids; and mono(meth)acrylates of polymers having carboxyl and hydroxyl groups at both ends, such as ω-carboxylated polycaprolactone mono(meth)acrylate, with acrylic acid and methacrylic acid being preferred.

[0092] The alkali-soluble resin can be manufactured by copolymerizing the carboxyl-containing vinyl unsaturated monomer with the hydroxyl-containing vinyl unsaturated monomer (b2). Alternatively, the alkali-soluble resin can be manufactured by copolymerizing the copolymer of the carboxyl-containing vinyl unsaturated monomer with the compound (b3) containing glycidyl groups. Furthermore, the alkali-soluble resin can also be manufactured by copolymerizing the carboxyl-containing vinyl unsaturated monomer, the hydroxyl-containing vinyl unsaturated monomer, and the compound containing glycidyl groups.

[0093] (b2) Ethylene unsaturated monomers with hydroxyl groups

[0094] Specific examples of the hydroxyl-containing vinyl unsaturated monomers mentioned above include 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 4-hydroxybutyl methacrylate, 2-hydroxy-3-phenoxypropyl methacrylate, and N-hydroxyethylacrylamide, with 2-hydroxyethyl methacrylate being preferred. Two or more of these monomers can be used in combination.

[0095] (b3) Compounds containing glycidyl groups

[0096] Specific examples of the compounds having a glycidyl group include butyl glycidyl ether, glycidyl propyl ether, glycidyl phenyl ether, 2-ethylhexyl glycidyl ether, glycidyl butyrate, glycidyl methyl ether, ethyl glycidyl ether, glycidyl isopropyl ether, tert-butyl glycidyl ether, benzyl glycidyl ether, 4-tert-butylbenzoic acid glycidyl ether, glycidyl stearate, aryl glycidyl ether, glycidyl methacrylate, etc., preferably butyl glycidyl ether, aryl glycidyl ether, and glycidyl methacrylate, and two or more of them can be used in combination.

[0097] The copolymers containing the above-mentioned isocyanate-terminated groups can be manufactured by copolymerizing unsaturated monomers (b4).

[0098] (b4) Unsaturated monomers

[0099] The aforementioned unsaturated monomers may be used individually or in combination of two or more, and are not limited to the examples below.

[0100] Aromatic vinyl compounds such as styrene, vinyltoluene, α-methylstyrene, p-chlorostyrene, o-methoxystyrene, m-methoxystyrene, p-methoxystyrene, o-vinylbenzylmethyl ether, m-vinylbenzylmethyl ether, p-vinylbenzylmethyl ether, o-vinylbenzyl glycidyl ether, m-vinylbenzyl glycidyl ether, p-vinylbenzyl glycidyl ether, etc.

[0101] N-Cyclohexylmaleimide, N-Benzylmaleimide, N-Phenylomaleimide, N-o-Hydroxyphenylmaleimide, N-m-Hydroxyphenylmaleimide, N-p-Hydroxyphenylmaleimide, N-o-Methylphenylmaleimide, N-m-Methylphenylmaleimide, N-p-Methylphenylmaleimide, N-o-Methoxyphenylmaleimide, N-m-Methoxyphenylmaleimide, N-p-Methoxyphenylmaleimide, and other N-substituted maleimide compounds;

[0102] Alkyl methacrylates such as methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, sec-butyl methacrylate, and tert-butyl methacrylate; and alicyclic methacrylates such as cyclopentyl methacrylate, cyclohexyl methacrylate, 2-methylcyclohexyl methacrylate, tricyclo[5.2.1.0 2,6]decane-8-yl methacrylate, 2-dicyclopentoxyethyl methacrylate, and isobornyl methacrylate.

[0103] (Meth)phenyl acrylate, (meth)benzyl acrylate, and other (meth)acrylate aryl esters;

[0104] Unsaturated oxetane compounds such as 3-(methacryloyloxymethyl)oxetane, 3-(methacryloyloxymethyl)-3-ethyloxetane, 3-(methacryloyloxymethyl)-2-trifluoromethyloxetane, 3-(methacryloyloxymethyl)-2-phenyloxetane, 2-(methacryloyloxymethyl)oxetane, and 2-(methacryloyloxymethyl)-4-trifluoromethyloxetane.

[0105] In this specification, (meth)acrylate means acrylate or methacrylate.

[0106] Furthermore, to ensure the developability of the black photosensitive resin composition, the acid value of the alkali-soluble resin is 20 to 200 mg KOH / g, preferably 30 to 150 mg KOH / g. When the acid value of the alkali-soluble resin meets the above range, the black photosensitive resin composition can ensure sufficient development speed, improve adhesion to the substrate, and prevent short circuits in the pattern, which is therefore preferable.

[0107] The weight-average molecular weight (Mw) of the alkali-soluble resin of the present invention can be 3,000 to 30,000, preferably 5,000 to 25,000. Furthermore, the molecular weight distribution of the alkali-soluble resin of the present invention, i.e., the weight-average molecular weight relative to the number-average molecular weight (weight-average molecular weight (Mw) / number-average molecular weight (Mn)), can be 1.5 to 6.0, preferably 1.8 to 4.0. When the alkali-soluble resin meets the above-mentioned ranges of weight-average molecular weight and molecular weight distribution, it has the advantage of excellent developability.

[0108] The content of the alkali-soluble resin, relative to 100% by weight of the total black photosensitive resin composition, can be 4 to 10% by weight, preferably 4.5 to 6% by weight. When the content of the alkali-soluble resin is within the above range, the solubility in the developer is sufficient to easily form a pattern, preventing the reduction of film in the pixel portion of the exposed area during development, and improving the peeling resistance of the non-pixel portion, which is therefore preferred.

[0109] (C) Photopolymerizable compounds

[0110] Photopolymerizable compounds are substances that polymerize and solidify when exposed to light such as ultraviolet light. In this invention, by using monomers with 6 or fewer functional groups, a forward taper with a cone angle of 90 degrees or less can be formed before the post-bake process (when a reflow process occurs).

[0111] In the case of compositions for low-temperature curing with a post-bake temperature below 100°C, it is difficult to expect a positive slope based on reflow during the post-bake process, so it is especially important to form a positive slope before the post-bake process.

[0112] Furthermore, it exhibits excellent adhesion to the underlying substrate, facilitating the formation of fine patterns. This is particularly effective when using monomers with hydroxyl groups or fewer that are hexagonal or less functional.

[0113] Examples of monomers containing hydroxyl groups and having six or fewer functions include, but are not limited to, dipentaerythritol hexaacrylate.

[0114] The content of the photopolymerizable compound relative to the total weight of the black photosensitive resin composition can be 2.5 to 4% by weight, and a content of 3 to 4% by weight is more preferred. When the content of the photopolymerizable compound is within the above range, there is a tendency for the strength or smoothness of the pixel area to improve, and therefore it is preferred.

[0115] (D) Photopolymerization initiator

[0116] In this invention, the photopolymerization initiator is a compound used to initiate the polymerization of the above-mentioned photopolymerizable compounds. There are no particular limitations in this invention, and compounds such as acetophenone, benzophenone, triazine, thioxanone, oxime, benzoin, anthraquinone, and bimidazole can be used, either alone or in combination of two or more.

[0117] The content of the photopolymerization initiator relative to the total weight of the black photosensitive resin composition can be 0.3 to 0.7% by weight, and is more preferably 0.4 to 0.6% by weight. This content range takes into account the photopolymerization rate of the photopolymerizable compound and the physical properties of the final coating film. If the content is less than this range, the polymerization rate may decrease and the overall process time may increase. Conversely, if the content is greater than this range, the physical properties of the coating film may decrease due to excessive crosslinking reaction. Using the photopolymerization initiator within the above content range can improve the strength of the pixel area and the straightness of the pattern.

[0118] (E) Solvent

[0119] The solvents described above can be used without particular limitation, provided they are effective in dissolving the other components contained in the black photosensitive resin composition of the present invention. Solvents commonly used in coloring photosensitive resin compositions are particularly preferred, such as ethers, aromatic hydrocarbons, ketones, alcohols, esters, or amides.

[0120] Specific examples of the solvents mentioned above include ethylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, and ethylene glycol monobutyl ether; diethylene glycol dialkyl ethers such as diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, and diethylene glycol dibutyl ether; ethylene glycol alkyl ether acetates such as methyl cellosolve acetate and ethyl cellosolve acetate; and propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, and propylene glycol monoethyl ether acetate. Alkylene glycol monopropyl ether acetate, methoxybutyl acetate, methoxypentyl acetate and other alkylene glycol alkyl ether acetates; aromatic hydrocarbons such as benzene, toluene, xylene, mesitylene and other aromatic hydrocarbons; ketones such as methyl ethyl ketone, acetone, methyl pentyl ketone, methyl isobutyl ketone, cyclohexanone and other ketones; alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, glycerol and other alcohols; esters such as ethyl 3-ethoxypropionate, methyl 3-methoxypropionate and other cyclic esters such as γ-butyrolactone, etc.

[0121] Among the solvents mentioned above, considering coating properties and drying properties, organic solvents with a boiling point of 100℃ to 200℃ are preferred. More preferably, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, cyclohexanone, ethyl lactate, butyl lactate, ethyl 3-ethoxypropionate, methyl 3-methoxypropionate, etc., can be used.

[0122] The solvents mentioned above can be used individually or in combination of two or more.

[0123] The content of the solvent relative to the total weight of the black photosensitive resin composition can be 30 to 40% by weight, preferably 30 to 35% by weight. When the content of the solvent is within the above range, it provides better coatability when coating with coating equipment such as roller coaters, spin coaters, slot coaters, slot coating machines (sometimes also called die coaters), and inkjet printers, and is therefore preferred.

[0124] (F) Epoxy compounds

[0125] In addition to the above-mentioned components, the black photosensitive resin composition of the present invention may further contain epoxy compounds as needed by those skilled in the art, to a extent that does not impair the purpose of the present invention.

[0126] The aforementioned epoxy compounds can be used as curing agents to improve deep curing and mechanical strength.

[0127] Examples of the aforementioned epoxy compounds include bisphenol A type epoxy resins, hydrogenated bisphenol A type epoxy resins, bisphenol F type epoxy resins, hydrogenated bisphenol F type epoxy resins, phenolic varnish type epoxy resins, other aromatic epoxy resins, alicyclic epoxy resins, glycidyl ester resins, glycidyl amine resins, or brominated derivatives of these epoxy resins, aliphatic, alicyclic, or aromatic epoxy compounds other than epoxy resins and their brominated derivatives, butadiene (co)polymer epoxides, isoprene (co)polymer epoxides, (meth)acrylate glycidyl ester (co)polymers, triglycidyl isocyanurate, etc. Specifically, Celloxide 2021P is preferred, for example.

[0128] The aforementioned epoxy compounds can be used in combination with curing aids, which together with the epoxy compounds can cause ring-opening polymerization of the epoxy group and the oxetane skeleton of the oxetane compound. Examples of such curing aids include polycarboxylic acids, polycarboxylic anhydrides, and acid-generating agents. Commercially available epoxy resin curing agents can be used for these polycarboxylic anhydrides. Specific examples of such epoxy resin curing agents include ADEKA HARDENER EH-700 (trade name, manufactured by ADEKA Industries, Ltd.), RIKACID HH (trade name, manufactured by Shin Nippon Rikka Co., Ltd.), and MH-700 (trade name, manufactured by Shin Nippon Rikka Co., Ltd.). The epoxy compounds described above can be used alone or in combination of two or more.

[0129] The epoxy compound described above may be added as appropriate by those skilled in the art without impairing the effects of the present invention. For example, the epoxy compound may be used at 0.05 to 10% by weight, preferably 0.1 to 9% by weight, and more preferably 0.1 to 8% by weight relative to the total weight of the black photosensitive resin composition, but is not limited thereto.

[0130] (G) Additives

[0131] In addition to the above-mentioned components, the black photosensitive resin composition of the present invention may further contain additives as needed without prejudice to the purpose of the present invention.

[0132] The additives mentioned above may include leveling agents, etc.

[0133] As the leveling agent mentioned above, commercially available surfactants can be used to further improve the film-forming properties of the black photosensitive resin composition. Examples include silicone-based, fluorine-based, ester-based, cationic, anionic, nonionic, and amphoteric surfactants, which can be used individually or in combination of two or more.

[0134] The above-mentioned additives may be used by those skilled in the art without impairing the effects of the present invention. For example, the above-mentioned additives may be used at 0.05 to 10% by weight, preferably 0.1 to 9% by weight, and more preferably 0.1 to 8% by weight relative to the total weight of the black photosensitive resin composition, but are not limited thereto.

[0135] <Black Matrix, Color Filters, and Display Devices>

[0136] This invention relates to a black matrix manufactured using the above-described black photosensitive resin composition.

[0137] The method for manufacturing the black photosensitive resin composition of the present invention is not particularly limited, and is carried out in accordance with known methods for manufacturing black photosensitive resin compositions.

[0138] For example, the colorant can be added to the solvent, followed by the remaining components and other additives, and then stirred to obtain the final product. In this case, the colorant can be added in the form of a paint paste, formed by pre-dissolving or dispersing pigments or the like in a solvent or alkali-soluble resin. If the additives are in solution form, they can be added to the solvent along with the colorant beforehand.

[0139] The black photosensitive resin composition thus manufactured is preferably used to manufacture the black matrix of a display device.

[0140] The present invention also relates to a color filter comprising a black matrix manufactured using the aforementioned black photosensitive resin composition, the color filter comprising a black matrix formed on a substrate. When using the black photosensitive resin composition of the present invention, the black matrix can be manufactured at low temperatures; therefore, the substrate is preferably a flexible substrate or a substrate containing an organic layer, particularly a substrate with an organic layer in the lower layer, and the black matrix can also be flexible.

[0141] The typical patterning process for forming a black matrix using photolithography involves the following steps:

[0142] a) The step of coating a substrate with a black photosensitive resin composition;

[0143] b) Pre-drying step to dry the solvent;

[0144] c) The step of curing the exposed portion by irradiating the obtained film with active light through a photomask;

[0145] d) The step of performing a developing process that dissolves the unexposed portion using an alkaline aqueous solution; and

[0146] e) Perform the drying and post-baking steps.

[0147] The aforementioned substrate uses a glass substrate or a polymer substrate, preferably a flexible substrate. A flexible substrate is defined as a substrate with flexibility. As a glass substrate, soda-lime glass, barium or strontium-containing glass, lead glass, aluminosilicate glass, borosilicate glass, barium borosilicate glass, or quartz are particularly preferred. As a polymer substrate, examples include polycarbonate, acrylic, polyethylene terephthalate, polyether sulfide, or polysulfone. Furthermore, one side of the substrate may contain an organic layer; this organic layer can be any organic material commonly used in OLEDs without restriction.

[0148] At this point, the desired thickness can be achieved by using wet coating methods with coating devices such as roller coaters, spin coaters, slot coaters, slot coaters (sometimes also called die coaters), and spray printers.

[0149] Pre-drying is performed using an oven, heating plate, or similar equipment. The heating temperature and time during pre-drying are selected based on the solvent used; for example, it can be carried out at a temperature above 80°C and below 100°C for 1 to 30 minutes.

[0150] Furthermore, the pre-baking followed by exposure is performed using an exposure machine, with exposure through a photomask, so that only the area corresponding to the pattern is exposed to light. The light used in this process can be, for example, visible light, ultraviolet light, X-rays, or electron beams.

[0151] Alkaline development after exposure is performed to remove the remaining photosensitive resin composition from the unexposed areas, thereby forming a desired pattern. This development is carried out using a 0.02–0.06% by weight KOH alkaline aqueous solution at a temperature of 10–50°C, preferably 20–40°C, using a developing machine or ultrasonic cleaner.

[0152] Post-baking is performed to improve the adhesion between the patterned film and the substrate, and is preferably achieved by heat treatment at a temperature of 80°C or higher but lower than 100°C for 10 to 120 minutes. Specifically, when using a flexible substrate with poor heat resistance or when an organic layer is present in the lower layer, heat treatment at a temperature of 80°C or higher but lower than 100°C is preferred. Post-baking is performed using an oven, heating plate, or similar equipment, just like pre-baking.

[0153] At this point, the thickness of the film used as the black matrix is ​​preferably 1.0 μm to 5.0 μm, more preferably 1.0 μm to 3.0 μm, and particularly preferably 1.0 μm to 2.0 μm.

[0154] The black matrix manufactured from the black photosensitive resin composition of the present invention has the effect of improving the adhesion of the black matrix to the substrate, and thus can have excellent properties in terms of the driving performance and durability of the display device.

[0155] Furthermore, the present invention provides a display device comprising the aforementioned color filter.

[0156] The present invention will now be described in more detail based on embodiments, but the embodiments disclosed below are merely illustrative, and the scope of the invention is not limited by these embodiments. The scope of the invention is defined by the scope of the claims, and includes all modifications within the scope and meaning of the claims. Furthermore, in the following embodiments and comparative examples, unless specifically mentioned otherwise, "%" and "parts" of content are expressed on a weight basis.

[0157] <Synthesis example>

[0158] Synthesis of alkali-soluble resins and dispersion resins (B-1)

[0159] In a 1-liter separating flask equipped with a stirrer, thermometer, reflux condenser, dropping funnel, and nitrogen inlet tube, 277 g of butyl methoxyacetate was added. The mixture was heated to 80°C, and then added dropwise over 5 hours until 3,4-epoxytricyclic acrylic acid [5.2.1.0] was produced. 2,6 ] Decane-9-yl ester and 3,4-epoxytricyclic acrylate [5.2.1.0] 2,6A mixture of 301 g of decane-8-yl ester [50:50 (molar ratio)], 49 g of methacrylic acid, and 23 g of azobis(dimethyl)valerate was dissolved in 350 g of methoxyethyl acetate to form a mixed solution, which was then aged for 3 hours to obtain copolymer solution A [solid content (NV) 35.0 wt%]. The resulting copolymer had an acid value (dry) of 69.8 mg KOH / g, a weight-average molecular weight (Mw) of 12300, and a dispersion (Mw / Mn) of 2.1.

[0160] Synthesis of alkali-soluble resin (B-2)

[0161] In a flask equipped with a stirrer, dropping funnel, condenser, thermometer, and gas inlet tube, 257.3 g of diethylene glycol methyl ethyl ether was added. The mixture was stirred while purging with nitrogen and heated to 78°C. Next, a monomer mixture consisting of 110.0 g of dicyclopentyl methacrylate, 17.0 g of glycidyl methacrylate, 28.4 g of methacrylic acid, and 12.1 g of malonic acid-2-[[[2-methyl-1-oxo-2-propenyl]oxy]ethyl]amino]carbonyl]-1,3-diethyl malonic acid (with a terminal isocyanate dissociation rate of 85 wt%) was added dropwise to the flask. A further mixture was prepared by dissolving 13.4 g of 2,2'-azobis(2,4-dimethylpentanones) (polymerization initiator) in 78.7 g of diethylene glycol methyl ethyl ether. After the addition was completed, the mixture was stirred at 78°C for 3 hours to carry out a copolymerization reaction, generating a copolymer to obtain an alkali-soluble resin (B-2) (the concentration of components other than the solvent was 40% by weight). The copolymer in the obtained alkali-soluble resin (B-2) had a weight-average molecular weight (Mw) of 8,500 and an acid value of 103.0 mg KOH / g.

[0162] Synthesis of alkali-soluble resin (B-3)

[0163] In a 1000 ml flask equipped with a stirrer, thermometer, reflux condenser, dropping funnel, and nitrogen inlet, 400 parts of propylene glycol monomethyl ether acetate, 7 parts of AIBN, 15 parts of tricyclodecane methacrylate, 30 parts of methacrylate, 20 parts of methacrylic acid, 20 parts of 3-ethoxy-2-({2-[(2-methacryloyl)oxy]ethyl}carbamoyl)but-3-enoic acid ethyl ester (the compound represented by chemical formula 2-1 below), and 15 parts of hydroxy methacrylate were added, followed by nitrogen purging. Then, while stirring, the temperature of the reaction solution was raised to 120°C, and the reaction was carried out for 10 hours. The resulting alkali-soluble resin containing isocyanate-terminated groups had a final solids content of 30.0%, a solids acid value of 95 mg KOH / g, and a weight-average molecular weight of 7600 as determined by GPC.

[0164] [Chemical Formula 2-1]

[0165]

[0166] Synthesis of alkali-soluble resin (B-4)

[0167] In a 1000 ml flask equipped with a stirrer, thermometer, reflux condenser, dropping funnel, and nitrogen inlet tube, 400 parts of propylene glycol monomethyl ether acetate, 7 parts of AIBN, 15 parts of tricyclodecane methacrylate, 30 parts of methacrylate, 20 parts of methacrylic acid, 20 parts of 2-{[1-(3,5-dimethyl-4,5-dihydro-1H-pyrazol-1-yl)ethylene]amino}2-methylprop-2-enoate (the compound represented by chemical formula 2-2 below), and 15 parts of hydroxy methacrylate were added, followed by nitrogen purging. Then, while stirring, the temperature of the reaction solution was raised to 120°C, and the reaction was carried out for 10 hours. The final solid content of the synthesized alkali-soluble resin was 32.0%, the solid content acid value was 90 mg KOH / g, and the weight-average molecular weight determined by GPC was 7100.

[0168] [Chemical Formula 2-2]

[0169]

[0170] <Manufacturing Example>

[0171] Preparation of coloring dispersion (D-1)

[0172] A composition consisting of 15.0 parts by weight of carbon black (P.Bk.7) as pigment, 3 parts by weight of dispersion resin synthesized under the above conditions as dispersion resin (solid content conversion) [solid content (NV) 35.0 wt%], 5 parts by weight of acrylic polymeric dispersant (DISPERBYK-2000) as dispersant (solid content conversion) [solid content (NV) 40.0 wt%], and 77 parts by weight of propylene glycol monomethyl ether acetate as solvent was mixed with rigid grinding media (zirconia beads) with an average particle size of 0.1 mm at a weight ratio of 50:50 and added. The pigment was then dispersed in a bead mill for 4 to 6 hours to produce a colored dispersion (D-1).

[0173] Preparation of coloring dispersion (D-2)

[0174] A composition consisting of 15.0 parts by weight of an organic black pigment (BASF Irgaphor S100CF) as a pigment, 3 parts by weight (converted to solid content) [35.0% by weight of solid content (NV)] of a dispersion resin synthesized under the above conditions as a dispersion resin, 5 parts by weight (converted to solid content (NV)) of an acrylic polymeric dispersant (DISPERBYK-2000) as a dispersant [40.0% by weight of solid content (NV)], and 77 parts by weight of propylene glycol monomethyl ether acetate as a solvent was mixed with rigid grinding media (zirconia beads) with an average particle size of 0.1 mm at a weight ratio of 50:50 and added. The pigment was then dispersed in a bead mill for 4 to 6 hours to produce a colored dispersion (D-2).

[0175] Preparation of coloring dispersion (D-3)

[0176] A composition consisting of 15.0 parts by weight of organic red pigment (R254) as pigment, 3 parts by weight of dispersion resin synthesized under the above conditions as dispersion resin (solid content conversion) [solid content (NV) 35.0 wt%], 5 parts by weight of acrylic polymeric dispersant (DISPERBYK-2000) as dispersant (solid content conversion) [solid content (NV) 40.0 wt%], and 77 parts by weight of propylene glycol monomethyl ether acetate as solvent is mixed with rigid grinding media (zirconia beads) with an average particle size of 0.1 mm at a weight ratio of 50:50 and added. The pigment is then dispersed in a bead mill for 4 to 6 hours to produce a colored dispersion (D-3).

[0177] Preparation of coloring dispersion (D-4)

[0178] In the manufacturing of the coloring dispersion (D-3), the pigment is changed to R177 for dispersion, thereby manufacturing the coloring dispersion (D-4).

[0179] Preparation of coloring dispersion (D-5)

[0180] In the manufacturing of the coloring dispersion (D-3), the pigment is changed to R179 for dispersion, thereby manufacturing the coloring dispersion (D-5).

[0181] Manufacturing of coloring dispersion (D-6)

[0182] In the manufacturing of the coloring dispersion (D-3), the pigment is changed to R269 for dispersion, thereby manufacturing the coloring dispersion (D-6).

[0183] Manufacturing of coloring dispersions (D-7)

[0184] In the manufacturing of the coloring dispersion (D-3), the pigment is changed to R264 for dispersion, thereby manufacturing the coloring dispersion (D-7).

[0185] Examples 1-12 and Comparative Examples 1-4: Black Photosensitive Resin Compositions

[0186] The black photosensitive resin compositions of Examples 1-12 and Comparative Examples 1-4 were manufactured according to the compositions in Tables 1-2 below.

[0187] [Table 1]

[0188]

[0189] [Table 2]

[0190]

[0191] The ingredients used in the above embodiments and comparative examples are as follows.

[0192] -D-1~D-7: Coloring dispersions D-1~D-7 from Examples 1 to 7

[0193] -B-1: Alkali-soluble resin B-1 from Synthetic Example 1

[0194] -B-2: Alkali-soluble resin B-2 from Synthetic Example 2

[0195] -B-3: Alkali-soluble resin B-3 from Synthetic Example 3

[0196] -B-4: Alkali-soluble resin B-4 from Synthetic Example 4

[0197] - Photopolymerizable compound (M): Dipentaerythritol hexaacrylate (A-9550, manufactured by Shin-Nakamura Co., Ltd.)

[0198] -Initiator: Irgacure OXE-02 (oxime photoinitiator, manufactured by BASF)

[0199] - Additive (A-1): Epoxy compound (Celloxide 2021P, Daicel Inc.)

[0200] Additive (A-2): F-554 (manufactured by DIC Corporation)

[0201] - Solvent: Propylene glycol monomethyl ether acetate (PGMEA; manufactured by Sigma-Aldrich)

[0202] Experimental Example: Physical Property Evaluation of Black Photosensitive Resin Composition

[0203] (1) Fabrication of black substrate

[0204] A 5cm x 5cm glass substrate (Corning Corporation) was cleaned with a neutral detergent and water and then dried. A coating was formed on the glass substrate using the black photosensitive resin compositions of the examples and comparative examples, with a final film thickness of 1.5 μm (measured by a Dektak device). The coating was then exposed at an exposure dose of 100 mJ / cm². 2 Expose the material and bake it at 90°C for 60 minutes to form a cured film. Immerse the cured film in propylene glycol monomethyl ether acetate (PGMEA) at 90°C for 15 minutes to produce a black substrate.

[0205] (2) Transmittance measurement

[0206] The transmittance (%) of the black substrate manufactured in (1) above at a wavelength of 900 nm was measured using a UV-Vis (Shimadzu UV-2600) device, and the results are shown in Tables 3 and 4 below.

[0207] (3) Evaluation of optical density (OD)

[0208] The optical density (OD) of the black substrate manufactured in (1) above was measured using an X-rite OD meter, and the results are shown in Tables 3 and 4 below.

[0209] (4) Evaluation of reflectance and reflected color perception

[0210] Reflectance and reflectance were measured using an integrating sphere reflectance (CM-3700D) device, and the results are shown in Tables 3 and 4 below.

[0211] (5) Evaluation of surface condition after impregnation

[0212] The black substrate manufactured in (1) above was photographed using an optical microscope, and the image was compared with a reference image. Figure 1 The surface condition after immersion in EEP (@90℃ / 10min) solvent was evaluated using validated evaluation criteria, and the results are shown in Tables 3 and 4 below. Specifically, in Table 3 below, when... Figure 1 The first image, with little or no surface damage, is recorded as "◎". Figure 1 When localized damage occurs on the surface, as shown in the second image, it is recorded as "O". Figure 1 The third image shows a surface that has undergone overall damage, which is recorded as "△". Figure 1 The fourth image shows a surface that is completely damaged, which is recorded as "X".

[0213] [Table 3]

[0214]

[0215] [Table 4]

[0216]

[0217] Referring to Tables 3 and 4 above, it can be confirmed that if a coating film is formed using the composition of the embodiments of the present invention that can be cured at low temperatures below 100°C, not only are the spectroscopic properties such as transmittance, optical density (OD), reflectance, and reflectance color perception (a* and b*) at 900 nm excellent, but the reliability with ethyl 3-ethoxypropionate (EEP) solvent is also excellent.

[0218] On the other hand, when the comparative example composition was used, the results showed a significant decrease in spectroscopic properties and reliability compared to the examples.

Claims

1. A black photosensitive resin composition comprising a colorant, an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator, and a solvent. The colorant comprises one or more pigments selected from inorganic black pigments and organic black pigments, as well as organic coloring pigments. The organic coloring pigment comprises one or more of Pigment Red 179, 264, and 269. The alkali-soluble resin comprises one or more selected from epoxy-containing copolymers and copolymers containing terminated isocyanate groups. The coating formed using the aforementioned black photosensitive resin composition exhibits a transmittance (T%) of over 90% at a wavelength of 900 nm, based on a thickness of 1.5 μm. The coating formed using the black photosensitive resin composition is cured at a low temperature below 100°C.

2. The black photosensitive resin composition according to claim 1, wherein the reflectance of the coating film in the long wavelength of 900 nm, i.e., near-infrared, is 4.7 or less, and the reflected color sensitivity a* and b* are 0.85 or less and 0.05 or less, respectively.

3. The black photosensitive resin composition according to claim 1, characterized in that, The optical density (OD) of the coating is above 1.7 / μm.

4. The black photosensitive resin composition according to claim 1, characterized in that, The black photosensitive resin composition is used to form patterns on substrates, including flexible substrates.

5. The black photosensitive resin composition according to claim 1, characterized in that, The epoxy-containing copolymer comprises a compound represented by the following chemical formula 1: Chemical Formula 1 In the chemical formula 1, R1 and R2 are each independently either hydrogen or CH3. a and b are each independent integers from 3 to 20.

6. The black photosensitive resin composition according to claim 1, wherein the copolymer containing capped isocyanate groups is derived from a compound represented by the following chemical formula 2. Chemical formula 2 In the chemical formula 2, D is either =O or =CH2 Z can be acrylate, methacrylate, or vinyl. L 1 It is a straight-chain or branched alkylene group with 1 to 20 carbon atoms. BL represents residues derived from thermally dissociable capping agents.

7. The black photosensitive resin composition according to claim 1, wherein, relative to the total weight of the black photosensitive resin composition, the colorant comprises: 25% to 50% by weight of one or more pigments selected from inorganic black pigments and organic black pigments; and 7% to 15% by weight of organic coloring pigments.

8. The black photosensitive resin composition according to claim 1, further comprising an epoxy additive.

9. A color filter comprising a black matrix manufactured using the black photosensitive resin composition according to any one of claims 1 to 8.

10. A display device comprising the color filter of claim 9.

Images