Method for preparing pixel define layer

A method for preparing a pixel defining layer comprising application and coating;

• pre-baking;
• exposure to light;
• developing;
• and post- baking of a photosensitive composition, which comprises a cardo-based binder resin of Formula 1 below;
• a reactive unsaturated compound;
• a photoinitiator;
• and a solvent,
• wherein after the post-baking, a coating film has an optical density of 0.8/μm to 1.5/μm, a plastic hardness of 350 N/mm2 to 470 N/mm2, and a modulus of 5,200 Mpa to 6,800 Mpa:
• wherein in Formula 1 above,
• 1) R1 and R2 are each independently hydrogen;
• deuterium;
• a halogen;
• a C6-30 aryl group;
• a C2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P;
• a fused ring group of a C6-30 aliphatic ring and a C6-30 aromatic ring;
• a C1-20 alkyl group;
• a C2-20 alkenyl group;
• a C2-20 alkynyl group;
• a C1-20 alkoxy group;
• a C6-30 aryloxy group;
• a fluorenyl group;
• a carbonyl group;
• an ether group;
• or a C1-20 alkoxycarbonyl group,
• 2) R1 and R2 are able to form a ring between neighboring groups,
• 3) m and n are each independently an integer of 0 to 4,
• 4) A1 and A2 are each independently Formula 2 or Formula 3 below:
• in Formula 2 and Formula 3 above,
• 4-1) * represents a binding part,
• 4-2) R3 to R6 are each independently hydrogen;
• deuterium;
• a halogen;
• a C6-30 aryl group;
• a C2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P;
• a fused ring group of a C6-30 aliphatic ring and a C6-30 aromatic ring;
• a C1-20 alkyl group;
• a C2-20 alkenyl group;
• a C2-20 alkynyl group;
• a C1-20 alkoxy group;
• a C6-30 aryloxy group;
• a fluorenyl group;
• a carbonyl group;
• an ether group;
• or a C1-20 alkoxycarbonyl group,
• 4-3) R3 to R6 are able to form a ring between neighboring groups,
• 4-4) Y1 and Y2 are each independently Formula 6 or Formula 7 below:
• in Formula 6 and Formula 7 above,
• 4-4-1) * represents a binding position,
• 4-4-2) R9 is hydrogen or methyl,
• 4-4-3) R10 to R13 are each independently hydrogen;
• deuterium;
• a halogen;
• a C6-30 aryl group;
• a C2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P;
• a fused ring group of a C6-30 aliphatic ring and a C6-30 aromatic ring;
• a C1-20 alkyl group;
• a C2-20 alkenyl group;
• a C2-20 alkynyl group;
• a C1-20 alkoxy group;
• a C6-30 aryloxy group;
• a fluorenyl group;
• a carbonyl group;
• an ether group;
• or a C1-20 alkoxycarbonyl group,
• 4-4-4) L1 to L3 are each independently a single bond, a fluorenylene group;
• C2-30 alkylene;
• C6-30 arylene;
• a C2-30 heterocyclic ring;
• C1-30 alkoxylene, C2-30 alkyleneoxy;
• C6-30 aryloxy;
• or C2-30 polyethyleneoxy,
• 4-4-5) q and r are each independently an integer from 0 to 3;
• with the proviso that q+r=3, and
• 5) the ratio of Formula 2 and Formula 3 in the polymer chain of the resin including a repeating unit represented by Formula 1, above, is 9:1 to 1:9,
• 6) X1 is a single bond;
• O;
• CO;
• SO2;
• CR′R″;
• SiR′R″;
• Formula 4 below;
• or Formula 5 below,
• 6-1) R′ and R″ are each independently hydrogen;
• deuterium;
• a halogen;
• a C6-30 aryl group;
• a C2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P;
• a fused ring group of a C6-30 aliphatic ring and a C6-30 aromatic ring;
• a C1-20 alkyl group;
• a C2-20 alkenyl group;
• a C2-20 alkynyl group;
• a C1-20 alkoxy group;
• a C6-30 aryloxy group;
• a fluorenyl group;
• a carbonyl group;
• an ether group;
• or a C1-20 alkoxycarbonyl group,
• 6-2) R′ and R″ are able to form a ring between neighboring groups,
• in Formula 4 and Formula 5 above,
• 6-3) * represents a binding position,
• 6-4) R7 and R8 are each independently hydrogen;
• deuterium;
• a halogen;
• a C6-30 aryl group;
• a C2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P;
• a fused ring group of a C6-30 aliphatic ring and a C6-30 aromatic ring;
• a C1-20 alkyl group;
• a C2-20 alkenyl group;
• a C2-20 alkynyl group;
• a C1-20 alkoxy group;
• a C6-30 aryloxy group;
• a fluorenyl group;
• a carbonyl group;
• an ether group;
• or a C1-20 alkoxycarbonyl group,
• 6-5) o and p are each independently an integer from 0 to 4,
• 7) X2 is a C6-30 aryl group;
• a C2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P;
• a fused ring group of a C6-30 aliphatic ring and a C6-30 aromatic ring;
• a C1-20 alkyl group;
• a C2-20 alkenyl group;
• a C2-20 alkynyl group;
• a C1-20 alkoxy group;
• a C6-30 aryloxy group;
• a fluorenylene group;
• a carbonyl group;
• an ether group;
• or a C1-20 alkoxycarbonyl group, and
• 8) the R′, R″, X2, L1 to L3, R1 to R8, and R10 to R13 may each be further substituted with one or more substituents selected from the group consisting of deuterium;
• a halogen;
• a silane group substituted or unsubstituted with a C1-30 alkyl group or C6-30 aryl group;
• a siloxane group;
• a boron group;
• a germanium group;
• a cyano group;
• an amino group;
• a nitro group;
• a C1-30 alkylthio group;
• a C1-30 alkoxy group;
• a C6-30 arylalkoxy group;
• a C1-30 alkyl group;
• a C2-30 alkenyl group;
• a C2-30 alkynyl group;
• a C6-30 aryl group;
• a C6-30 aryl group substituted with deuterium;
• a fluorenyl group;
• a C2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P;
• a C3-30 alicyclic group;
• a C7-30 arylalkyl group;
• a C8-30 arylalkenyl group;
• and a combination thereof;
• or may form a ring between the neighboring substituents.