Method for preparing pixel define layer

Patent metadata

Field	Value
Publication number	US-12426440-B2
Application number	US-202318240477-A
Country	US
Kind code	B2
Filing date	Aug 31, 2023
Priority date	Sep 14, 2022
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

Provided is an implementation of a coloring pattern with a low moisture content on an electrode substrate to thereby improve display reliability and lifetime as well as vivid colors. That is, since when the moisture content is 50 ppm or more, it may cause a reduction in luminance and lifetime due to pixel shrinkage, in order to minimize the moisture content after completion of the post-baking process, the generation of moisture in the panel state is minimized by generating sufficient heat and time in the post-baking step, by including the colorant of the presently claimed subject matter.

First claim

What is claimed is:

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, which comprises a cardo-based binder resin of Formula 1; a reactive unsaturated compound; a photoinitiator having a molar absorption coefficient of 10,000 (L/mol cm) or more in the region of 330 nm to 380 nm; and a solvent,
wherein the post-baking step is performed at the oven temperature of 250° C. to 270° C. for 60 to 120 minutes, and the amount of moisture generated after the post-baking is 50 ppm or less:

wherein
1) R 1 and R 2 are each independently hydrogen; deuterium; a halogen; a C 6-30 aryl group; a C 2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P; a fused ring group of a C 6-30 aliphatic ring and a C 6-30 aromatic ring; a C 1-20 alkyl group; a C 2-20 alkenyl group; a C 2-20 alkynyl group; a C 1-20 alkoxy group; a C 6-30 aryloxy group; a fluorenyl group; a carbonyl group; an ether group; or a C 1-20 alkoxycarbonyl group,
2) R 1 and R 2 may form a ring with a neighboring group(s),
3) m and n are each independently an integer of 0 to 4,
4) A 1 and A 2 are each independently Formula 2 or Formula 3:

in Formula 2 and Formula 3,
4-1) * represents a binding part,
4-2) R 3 to R 6 are each independently hydrogen; deuterium; a halogen; a C 6-30 aryl group; a C 2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P; a fused ring group of a C 6-30 aliphatic ring and a C 6-30 aromatic ring; a C 1-20 alkyl group; a C 2-20 alkenyl group; a C 2-20 alkynyl group; a C 1-20 alkoxy group; a C 6-30 aryloxy group; a fluorenyl group; a carbonyl group; an ether group; or a C 1-20 alkoxycarbonyl group,
4-3) R 3 to R 6 may form a ring with a neighboring group(s),
4-4) Y 1 and Y 2 are each independently Formula 6 or Formula 7:

in Formula 6 and Formula 7,
4-4-1) * represents a binding position,
4-4-2) R 9 is hydrogen or methyl,
4-4-3) R 10 to R 13 are each independently hydrogen; deuterium; a halogen; a C 6-30 aryl group; a C 2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P; a fused ring group of a C 6-30 aliphatic ring and a C 6-30 aromatic ring; a C 1-20 alkyl group; a C 2-20 alkenyl group; a C 2-20 alkynyl group; a C 1-20 alkoxy group; a C 6-30 aryloxy group; a fluorenyl group; a carbonyl group; an ether group; or a C 1-20 alkoxycarbonyl group,
4-4-4) L 1 to L 3 are each independently a single bond, a fluorenylene group; C 2-30 alkylene; C 6-30 arylene; a C 2-30 heterocyclic ring; C 1-30 alkoxylene, C 2-30 alkyleneoxy; C 6-30 aryloxy; or C 2-30 polyethyleneoxy,
4-4-5) q and r are each independently an integer of 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) X 1 is a single bond; O; CO; SO 2 ; CR′R″; SiR′R″; Formula 4; or Formula 5,
6-1) R′ and R″ are each independently hydrogen; deuterium; a halogen; a C 6-30 aryl group; a C 2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P; a fused ring group of a C 6-30 aliphatic ring and a C 6-30 aromatic ring; a C 1-20 alkyl group; a C 2-20 alkenyl group; a C 2-20 alkynyl group; a C 1-20 alkoxy group; a C 6-30 aryloxy group; a fluorenyl group; a carbonyl group; an ether group; or a C 1-20 alkoxycarbonyl group, 6-2) R′ and R″ may form a ring with a neighboring group(s),

in Formula 4 and Formula 5,
6-3) * represents a binding position,
6-4) R 7 and R 8 are each independently hydrogen; deuterium; a halogen; a C 6-30 aryl group; a C 2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P; a fused ring group of a C 6-30 aliphatic ring and a C 6-30 aromatic ring; a C 1-20 alkyl group; a C 2-20 alkenyl group; a C 2-20 alkynyl group; a C 1-20 alkoxy group; a C 6-30 aryloxy group; a fluorenyl group; a carbonyl group; an ether group; or a C 1-20 alkoxycarbonyl group,
6-5) o and p are each independently an integer of 0 to 4,
7) X 2 is a C 6-30 aryl group; a C 2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P; a fused ring group of a C 6-30 aliphatic ring and a C 6-30 aromatic ring; a C 1-20 alkyl group; a C 2-20 alkenyl group; a C 2-20 alkynyl group; a C 1-20 alkoxy group; a C 6-30 aryloxy group; a fluorenylene group; a carbonyl group; an ether group; or a C 1-20 alkoxycarbonyl group, and
8) the R′, R″, X 2 , L 1 to L 3 , R 1 to R 8 , and R 10 to R 13 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 C 1-30 alkyl group or C 6-30 aryl group; a siloxane group; a boron group; a germanium group; a cyano group; an amino group; a nitro group; a C 1-30 alkylthio group; a C 1-30 alkoxy group; a C 6-30 arylalkoxy group; a C 1-30 alkyl group; a C 2-30 alkenyl group; a C 2-30 alkynyl group; a C 6-30 aryl group; a C 6-30 aryl group substituted with deuterium; a fluorenyl group; a C 2-30 heterocyclic group including at least one heteroatom among O, N, S, Si, and P; a C 3-30 alicyclic group; a C 7-30 arylalkyl group; a C 8-30 arylalkenyl group; and a combination thereof; or may form a ring between the neighboring substituents.

2. The method of claim 1 , wherein the photosensitive composition further comprises a colorant.

3. The method of claim 2 , wherein the colorant comprises one or more of inorganic dyes, organic dyes, inorganic pigments, and organic pigments.

4. The method of claim 2 , wherein the colorant is included in an amount of 1 wt % to 40 wt % based on the total amount of the photosensitive composition.

5. The method of claim 2 , wherein the colorant is pretreated using a dispersant; or a water-soluble inorganic salt and a wetting agent.

6. The method of claim 2 , wherein the average particle diameter of the colorant is 20 nm to 110 nm.

7. The method of claim 1 , wherein the photosensitive composition further comprises a patterning resin comprising an acryl-based binder resin.

8. The method of claim 1 , wherein the average molecular weight of the cardo-based binder resin is 1,000 g/mol to 100,000 g/mol.

9. The method of claim 1 , wherein the cardo-based binder resin is included in an amount of 1 wt % to 30 wt % based on the total amount of the photosensitive composition.

10. The method of claim 1 , wherein the reactive unsaturated compound is included in an amount of 1 wt % to 40 wt % based on the total amount of the photosensitive composition.

11. The method of claim 1 , wherein the photoinitiator is included in an amount of 0.01 wt % to 10 wt % based on the total amount of the photosensitive composition.

12. A pixel defining layer prepared according to the method of claim 1 .

13. An organic light emitting display device comprising the pixel defining layer according to clai

Assignees

• Duk San Neolux Co Ltd

Inventors

• Kim Jun Ki
• Lee Changmin
• Lee Yeon Soo
• Bae Jun
• Seo Hanwook
• Jeon Seo Jeong
• Mun Soung Yun
• Kim Kyung Soo

Classifications

• G03F7/40

  Treatment after imagewise removal, e.g. baking · CPC title

• G03F7/038

  Macromolecular compounds which are rendered insoluble or differentially wettable (G03F7/075 takes precedence; macromolecular azides G03F7/012; macromolecular diazonium compounds G03F7/021) · CPC title

• H10K59/122 Primary

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K71/40 Primary

  Thermal treatment, e.g. annealing in the presence of a solvent vapour · CPC title

• H10K85/111

  comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene · CPC title