Colored photosensitive resin composition and mutilayer cured film prepared therefrom
The colored photosensitive resin composition of the present invention maintains excellent resolution, visibility, and the like while it has excellent reflectance R SCI measured by the SCI (specular component included) method, reflectance R SCE measured by the SCE (specular component excluded) method, and the ratio between them (R SCE /R SCI ), and has a uniform film thickness in an appropriate range. Thus, it can be formed into a multilayer cured film that simultaneously satisfies such physical properties as a high reflectance and a high light-shielding property. In addition, when a cured film is formed from the composition, it is possible to form a pattern on a multilayer film in a single development process. Thus, it can be advantageously used for a quantum dot display device.
1 . A multilayer cured film, which comprises a first cured film formed from a first colored photosensitive resin composition and a second cured film formed from a second colored photosensitive resin composition,
wherein the first colored photosensitive resin composition comprises (A1) a first copolymer; (B) a photopolymerizable compound; (C) a photopolymerization initiator; and (D1) a white pigment,
the second colored photosensitive resin composition comprises (A2) a second copolymer; (B) a photopolymerizable compound; (C) a photopolymerization initiator; and (D2) a pigment other than white,
wherein the pigment other than white (D2) is at least one selected from the group consisting of a yellow pigment, a violet pigment, a red pigment, an orange pigment, and a blue pigment,
wherein the pigment other than white (D2) is employed in an amount of 5 to 10 parts by weight relative to 100 parts by weight of the second copolymer (A2) (on the basis of the solids content),
the multilayer cured film has a total thickness of 6 μm or more, and
wherein the reflectance R SCI measured by the SCI (specular component included) method and the reflectance R SCE measured by the SCE (specular component excluded) method for the multilayer cured film satisfy the following relationships, respectively:
50%≤ R SCI (Relationship 1)
40%≤ R SCE (Relationship 2)
50%≤ R SCE /R SCI (Relationship 3).
2 . The multilayer cured film of claim 1 , wherein the first cured film and the second cured film have a thickness of 10 μm or less, respectively.
3 . The multilayer cured film of claim 2 , wherein the second cured film is composed of multiple layers.
4 . The multilayer cured film of claim 3 , wherein the second cured film is composed of 2 to 10 layers.
5 . The multilayer cured film of claim 1 , wherein the multilayer cured film has a total thickness of 6 μm to 20 μm.
6 . The multilayer cured film of claim 1 , wherein the multilayer cured film is used as a structure of quantum dot barrier ribs.