| CPC H10K 59/1201 (2023.02) [G03F 7/0045 (2013.01); G03F 7/168 (2013.01); G03F 7/2004 (2013.01); G03F 7/38 (2013.01); H10K 59/122 (2023.02); H10K 71/40 (2023.02)] | 17 Claims |
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1. 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 comprising a cardo-based binder resin comprising Formula (1) below; a reactive unsaturated compound; a photoinitiator which has a molar absorption coefficient of 10,000 (L/mol·cm) or more in the region of 330 nm to 380 nm, and a 5 wt % loss occurring at 200° C. or less; and a solvent,
wherein the post-baking treatment step is performed for 60 to 120 minutes at an oven temperature of 230° C. to 290° C., and after the post-baking treatment step, the surface roughness has a value of 1.48 nm to 3.0 nm
 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 comprising 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 comprising 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 comprising 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 A1 and A2 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 comprising 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 comprising 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 comprising 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 comprising 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.
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15. A pixel defining layer prepared according to the method of claim 1.
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