Photosensitive resin composition and display device

Patent metadata

Field	Value
Publication number	US-11774852-B2
Application number	US-202017102606-A
Country	US
Kind code	B2
Filing date	Nov 24, 2020
Priority date	Nov 28, 2019
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

A photosensitive resin composition capable of reducing residues upon the development thereof, reducing melting flow, and forming a pattern layer having a high taper angle, by containing two or more kinds of different cardo binders; and a display device including a pattern layer containing a polymerization reaction product of the photosensitive resin composition.

First claim

What is claimed is:

1. A photosensitive resin composition comprising: (A) two or more kinds of cardo binders containing a repeating unit represented by Formula 1 below and having different molecular weights; (B) a reactive unsaturated compound; (C) a pigment; (D) an initiator; and (E) a solvent:

1) “*” indicates a portion where a bond is linked to the repeating unit;
2) R 1 and R 2 are each independently selected from the group consisting of deuterium, a halogen group, a C 6 -C 60 aryl group, a C 2 -C 60 heterocyclic group containing at least one heteroatom of O, N, S, Si, and P, a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, a C 1 -C 60 alkoxyl group, and a C 6 -C 30 aryloxy group;
3) R 3 to R 6 are each independently selected from the group consisting of hydrogen, deuterium, a halogen group, a C 6 -C 60 aryl group, a C 2 -C 60 heterocyclic group containing at least one heteroatom of O, N, S, Si, and P, a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, a C 1 -C 60 alkoxyl group, and a C 6 -C 30 aryloxy group;
4) R 7 is selected from the group consisting of hydrogen, deuterium, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, an acrylic group, and a methacrylic group;
5) M and n are each independently an integer of 0 to 4, wherein adjacent R's may be linked to each other to form a monocyclic or polycyclic ring when m is 2 or greater, and Res may be linked to each other to form a monocyclic or polycyclic ring when n is 2 or greater;
6) X 2 is an acid anhydride residue or acid dianhydride residue;
7) X 1 is represented by Formula 2 below;
8) Y 1 and Y 2 are each independently selected from the group consisting of hydrogen, deuterium, Formula 3 below; and Formula 4 below;

9) R 8 and R 9 are each independently selected from the group consisting of deuterium, a halogen group, a C 6 -C 60 aryl group, a C 2 -C 60 heterocyclic group containing at least one heteroatom of O, N, S, Si, and P, a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, a C 1 -C 60 alkoxyl group, and a C 2 -C 60 alkenyl group;
10) o and p are each independently an integer of 0 to 4, wherein adjacent R 8 's may be linked to each other to form a monocyclic or polycyclic ring when o is 2 or greater; and R 9 's may be linked to each other to form a monocyclic or polycyclic ring when p is 2 or greater;

11) L 1 to L 3 are each independently selected from the group consisting of a single bond, a C 1 -C 60 alkylene group, and a C 6 -C 60 arylene group;
12) R 10 to R 12 are each independently selected from the group consisting of hydrogen, deuterium, a halogen group, a C 6 -C 60 aryl group, a C 2 -C 60 heterocyclic group containing at least one heteroatom of O, N, S, Si, and P, a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring, a C 1 -C 60 alkyl group, and a C 1 -C 60 alkoxyl group;
13) R 13 is either a methyl group or an ethyl group;
14) R 14 is either a methoxy group or an ethoxy group;
15) Z 1 is S or O; and
16) q and r are each independently an integer of 0 to 3, and q+r=3.

2. The photosensitive resin composition of claim 1 , wherein the two or more kinds of cardo binders comprise a low-molecular weight cardo binder having a weight average molecular weight of 3000-5000 and a high-molecular weight cardo binder having a weight average molecular weight of 7000-9000.

3. The photosensitive resin composition of claim 2 , wherein the low-molecular weight cardo binder is contained in 50-90 wt % relative to the sum of the mass of the low-molecular weight cardo binder and the mass of the high-molecular weight cardo binder.

4. The photosensitive resin composition of claim 1 , wherein, as for at least one of the two or more kinds of cardo binders, at least one of Y 1 and Y 2 is represented by Formula 4 and the weight average molecular weight is 5000-7000.

5. The photosensitive resin composition of claim 1 , wherein, as for the two or more kinds of cardo binders, at least one of Y 1 and Y 2 is Formula 3.

6. The photosensitive resin composition of claim 1 , further comprising one or more of an acrylic binder and a polyimide binder.

7. The photosensitive resin composition of claim 6 , wherein the acrylic binder has a weight average molecular weight of 9000-13000, and wherein the polyimide binder has a weight average molecular weight of 1500-3900.

8. The photosensitive resin composition of claim 1 , wherein the two or more kinds of cardo binders (A) is contained in 1-30 wt %; the reactive unsaturated compound (B) is contained in 1-40 wt %; the pigment (C) is contained in 1-30 wt %; and the initiator (D) is contained in 0.01-10 wt %.

9. The photosensitive resin composition of claim 1 , wherein the initiator comprises one or more of a photopolymerization initiator and a radical polymerization initiator.

10. A display device comprising a pattern layer containing a polymerization reaction product of the photosensitive resin composition of claim 1 .

11. The display device of claim 10 , wherein the display device comprises a plurality of sub-pixels, and wherein the pattern layer is a pixel defining layer configured to divide the plurality of sub-pixels from each other.

12. The display device of claim 10 , wherein the pattern layer comprises a taper portion having a taper angle of 20-40 degrees.

Assignees

• Duk San Neolux Co Ltd

Inventors

• Bae Jun
• Lee Chang Min
• Kim Jun Ki
• Lim Jae Hyun
• Mun Soung Yun

Classifications

• G03F7/0007

  Filters, e.g. additive colour filters; Components for display devices · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/123

  Connection of the pixel electrodes to the thin film transistors [TFT] · CPC title

• G03F7/032 Primary

  with binders · CPC title

• C08G63/676

  in which at least one of the two components contains aliphatic unsaturation · CPC title