US 12,416,859 B2 · Method for preparing pixel define layer

Abstract

An object of the present disclosure is to improve display reliability and lifetime as well as vivid colors. When there remain residues in the washing part due to incomplete removal during the developing step, it can cause dark spots or pixel off due to the residues, and thus residue-free pixels can be formed by optimizing the temperature and time for developing. Additionally, when the amount of outgas in the panel after post-baking is 15 ppm or more, it may cause a reduction in luminance and lifetime due to pixel shrinkage. Therefore, in order to minimize the amount of outgas after completion of the post-baking process, the generation of outgas in the panel state can be minimized by generating sufficient fume in the post-baking step, in addition to forming clean pixels in the developing step.

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);
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 developing step is performed at a temperature of 19° C. to 27° C. for 30 to 90 seconds;
a thickness of the pixel defining layer after the developing step is 1.70 μm to 1.90 μm;
and there is no residual film on the pixel after the developing step;
wherein the post-baking step is performed at an oven temperature of 250° C. to 270° C. for 60 to 120 minutes;
the amount of fume generated in the post-baking is 86 ppm or more;
and
the amount of outgas generated in the pixel defining layer is 15 ppm or less:
wherein
1) R1 and R2 are each independently 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) m and n are each independently an integer of 0 to 4,
3) A1 and A2 are each independently Formula 2 or Formula 3:
in Formula 2 and Formula 3,
3-1) * represents a binding part,
3-2) 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,
3-3) Y1 and Y2 are each independently Formula 6 or Formula 7:
in Formula 6 and Formula 7,
3-3-1) * represents a binding position,
3-3-2) R9 is hydrogen or methyl,
3-3-3) 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,
3-3-4) 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,
3-3-5) q and r are each independently an integer of 0 to 3 with the proviso that q+r=3, and
4) 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,
5) X1 is a single bond;
O;
CO;
SO2;
CR′R″;
SiR′R″;
Formula 4;
or Formula 5,
5-1) 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,
in Formula 4 and Formula 5,
5-2) * represents a binding position,
5-3) R7 and R8 are each independently 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,
5-4) o and p are each independently an integer of 0 to 4,
6) 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
7) 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.

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Method for preparing pixel define layer

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Method for preparing pixel define layer

Life of this patent

Abstract

Claims18