Curable composition, light-shielding film, color filter, pattern forming method, method for manufacturing color filter, solid-state imaging element, and infrared sensor
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, and the Δ optical density calculated by Formula (1) is 1 or less, Δ Optical 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.
1. A curable composition comprising:
a visible light-absorbing coloring agent;
an infrared ray-absorbing coloring agent;
a polymerizable compound; and
a photopolymerization initiator,
wherein 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, and
the Δ optical density calculated by Formula (1) is 1 or less,
Δ Optical 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.
2. The curable composition according to claim 1 ,
wherein the average value of OD1 and OD2 is from 1 to 4.
3. 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, and a tungsten oxide-based compound.
4. The curable composition according to claim 2 ,
wherein the visible light-absorbing coloring agent includes at least one selected from titanium oxynitride, titanium nitride, carbon black, perylene black, Irgaphor Black, a red color-based organic pigment, a blue color-based organic pigment, a yellow color-based organic pigment, and a purple color-based organic pigment.
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, and a tungsten oxide-based compound.
6. The curable composition according to claim 5 ,
wherein the visible light-absorbing coloring agent includes at least one selected from titanium oxynitride, titanium nitride, carbon black, perylene black, Irgaphor Black, a red color-based organic pigment, a blue color-based organic pigment, a yellow color-based organic pigment, and a purple color-based organic pigment.
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, Irgaphor Black, a red color-based organic pigment, a blue color-based organic pigment, a yellow color-based organic pigment, and a purple color-based organic pigment.
8. The curable composition according to claim 1 , further comprising an acrylic or methacrylic resin having an adsorptive group.
9. The curable composition according to claim 1 , further comprising an alkali-soluble resin.
10. The curable composition according to claim 1 , used for manufacturing a color filter.
11. A light-shielding film formed by curing the curable composition according to claim 1 .
12. A color filter formed by curing the curable composition according to claim 1 .
13. A solid-state imaging device comprising the color filter according to claim 12 .
14. An infrared sensor comprising the color filter according to claim 12 .
15. 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.
16. A method for manufacturing a color filter, comprising the pattern forming method according to claim 15 .