Resin composition and filter element

A cured film formed from:

• a resin composition comprising:
• a black coloring agent (A);
• an ethylenically-unsaturated monomer (B);
• a solvent (C);
• a resin (D);
• and
• a photoinitiator (E),
• wherein the black coloring agent (A) comprises a titanium black (A-1) and a carbon black (A-2) each having a particle size of less than 100 nm, and based on a total usage amount of 100 parts by weight of the titanium black (A-1) and the carbon black (A-2), a usage amount of the titanium black (A-1) is 50 parts by weight to 75 parts by weight,
• wherein based on a usage amount of 100 parts by weight of the resin (D), a usage amount of the black coloring agent (A) is 25 parts by weight to 430 parts by weight, a usage amount of the ethylenically-unsaturated monomer (B) is 78 parts by weight to 115 parts by weight, a usage amount of the solvent (C) is 965 parts by weight to 2550 parts by weight, and a usage amount of the photoinitiator (E) is 4 parts by weight to 12 parts by weight,
• wherein the resin (D) is formed by a monomer represented by the following Formula (d-1),
• wherein the ethylenically-unsaturated monomer (B) comprises dipentaerythritol hexaacrylate and polyfunctional polyurethane acrylate,
• wherein the photoinitiator (E) comprises an oxime-based photoinitiator (E-1) and an acetophenone-based photoinitiator (E-2), and
• a resolution, as determined by a smallest dimension of an area with complete pattern integrity of a dot pattern of the cured film obtained after coating, pre-baking, exposuring, developing, and then post-baking the resin composition, is 0.9 to 1.1 microns when a thickness of the cured film is 0.3 microns to 3.0 microns.