Curable composition, light-shielding film, color filter, pattern forming method, method for manufacturing color filter, solid-state imaging element, and infrared sensor

Abstract

An object of the present invention is to provide a curable composition capable of forming a cured film having excellent linearity of a pattern, and a light-shielding film, a color filter, a solid-state imaging device, and an infrared sensor, each formed using the curable composition. Another object of the present invention is to provide a pattern forming method and a method for manufacturing a color filter, each using the curable composition.The curable composition of the present invention is a curable composition containing a visible light-absorbing coloring agent, an infrared ray-absorbing coloring agent, a polymerizable compound, and a photopolymerization initiator,in which a minimum value in optical densities per 1 μm of a film thickness in a wavelength range of 380 to 1,100 nm of a coating film of the curable composition is 1 or more, andthe Δ optical density calculated by Formula (1) is 1 or less,ΔOptical density=|OD1−OD2|  Formula (1)in Formula (1), OD1 represents a minimum value in optical densities per 1 μm of a film thickness in a wavelength range from 380 nm to 780 nm of the coating film, and OD2 represents a minimum value in optical densities per 1 μm of a film thickness in a wavelength range of more than 780 nm and 1,100 nm or less of the coating film.

What is claimed is: 
     
         1 . A curable composition comprising:
 a visible light-absorbing coloring agent;   an infrared ray-absorbing coloring agent;   a polymerizable compound;   a photopolymerization initiator; and   an acrylic or methacrylic resin having an adsorptive group,   wherein a content of the polymerizable compound with respect to the acrylic or methacrylic resin having an adsorptive group is 0.5 to 7 in terms of a mass ratio.   
     
     
         2 . The curable composition according to  claim 1 ,
 wherein the content of the photopolymerization initiator with respect to the acrylic or methacrylic resin having an adsorptive group is 0.1 to 2 in terms of a mass ratio.   
     
     
         3 . The curable composition according to  claim 1 , further comprising an alkali-soluble resin. 
     
     
         4 . The curable composition according to  claim 3 ,
 wherein a content of the alkali-soluble resin with respect to the acrylic or methacrylic resin having an adsorptive group is 5 or less in terms of a mass ratio.   
     
     
         5 . The curable composition according to  claim 1 ,
 wherein the infrared ray-absorbing coloring agent includes at least one selected from a pyrrolopyrrole-based compound, a phthalocyanine-based compound, a naphthalocyanine-based compound, a squarylium-based compound, a cyanine-based compound, a diimmonium-based compound, a tungsten oxide-based compound, a copper compound, an iminium compound, a thiol complex-based compound, a transition metal oxide-based compound, quaterrylene compound, a dithiol metal complex-based compound, and a croconium compound.   
     
     
         6 . The curable composition according to  claim 5 ,
 wherein the infrared ray-absorbing coloring agent includes at least one selected from a pyrrolopyrrole-based compound, a phthalocyanine-based compound, a naphthalocyanine-based compound, a squarylium-based compound, a cyanine-based compound, a diimmonium-based compound, and a tungsten oxide-based compound.   
     
     
         7 . The curable composition according to  claim 1 ,
 wherein the visible light-absorbing coloring agent includes at least one selected from titanium oxynitride, titanium nitride, carbon black, perylene black, niobium nitride, vanadium nitride, titanium oxide, iron oxide, manganese oxide, graphite, and chromatic color-based inorganic pigment.   
     
     
         8 . The curable composition according to  claim 7 ,
 wherein the visible light-absorbing coloring agent includes at least one selected from titanium oxynitride, titanium nitride, and carbon black.   
     
     
         9 . The curable composition according to  claim 1 ,
 wherein the acrylic or methacrylic resin having an adsorptive group has a structural unit with a graft chain.   
     
     
         10 . The curable composition according to  claim 9 ,
 wherein the graft chain is a graft chain having at least one selected from the group consisting of the polyester structure, the polyether structure, and the poly(meth)acrylate structure.   
     
     
         11 . The curable composition according to  claim 1 , used for manufacturing a color filter. 
     
     
         12 . A light-shielding film formed by curing the curable composition according to  claim 1 . 
     
     
         13 . A color filter formed by curing the curable composition according to  claim 1 . 
     
     
         14 . A pattern forming method comprising:
 a coating film forming step of forming a coating film on a substrate, using the curable composition according to  claim 1 ;   an exposing step of patternwise exposing the coating film; and   a developing step of removing an unexposed area by development to form a cured film in a pattern shape,   wherein a heating step is further provided after the exposing step or a heating treatment is further performed during the exposing step.   
     
     
         15 . A method for manufacturing a color filter, comprising the pattern forming method according to  claim 14 . 
     
     
         16 . A solid-state imaging device comprising the color filter according to  claim 13 . 
     
     
         17 . An infrared sensor comprising the color filter according to  claim 13 . 
     
     
         18 . The curable composition according to  claim 2 , further comprising an alkali-soluble resin. 
     
     
         19 . The curable composition according to  claim 18 ,
 wherein a content of the alkali-soluble resin with respect to the acrylic or methacrylic resin having an adsorptive group is 5 or less in terms of a mass ratio.   
     
     
         20 . The curable composition according to  claim 2 ,
 wherein the infrared ray-absorbing coloring agent includes at least one selected from a pyrrolopyrrole-based compound, a phthalocyanine-based compound, a naphthalocyanine-based compound, a squarylium-based compound, a cyanine-based compound, a diimmonium-based compound, a tungsten oxide-based compound, a copper compound, an iminium compound, a thiol complex-based compound, a transition metal oxide-based compound, quaterrylene compound, a dithiol metal complex-based compound, and a croconium compound.