Photosensitive composition, negative photosensitive composition, pixel division layer and organic EL display device

Patent metadata

Field	Value
Publication number	US-11940729-B2
Application number	US-202017777731-A
Country	US
Kind code	B2
Filing date	Nov 17, 2020
Priority date	Dec 2, 2019
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

The present invention provides a photosensitive composition which can suppress the generation of a development residue on the surface of an electrode and the corrosion of the electrode to form a black pixel division layer, and also can suppress the generation of off-pixel in an organic EL display device comprising the pixel division layer. Disclosed is a photosensitive composition comprising (a) a pigment, (b) a resin having two or more tertiary amino groups in the molecule, and (c) a photosensitive agent, wherein the component (b) contains a resin having a structure represented by the general formula (1).

First claim

The invention claimed is:

1. A negative photosensitive composition comprising:
(a-1) an organic black pigment or (a-2) a mixed organic black pigment,
(b) a resin having two or more tertiary amino groups in the molecule, and
(c) a photosensitive agent, wherein
the component (b) contains a resin having a structure represented by formula (16):

wherein, in formula (16),
* represents a bonding site to a carbon atom,
A 5 O, A 6 O, OA 7 and OA 8 each independently represent an oxyalkylene group having 1 to 5 carbon atoms,
A 9 and A 10 each independently represent an alkylene group having 2 to 6 carbon atoms,
n 1 is an integer and represents 0 to 7,
X 3 to X 6 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, and
a 19 to a 22 are integers and each independently represent 1 to 100.

2. The negative photosensitive composition according to claim 1 , wherein the composition contains the organic black pigment (a-1) that contains a benzodifuranone-based black pigment represented by formula (2) or formula (3):

wherein, in formula (2) and formula (3),
R 1 and R 2 each independently represent a hydrogen atom or a methyl group, and
R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms.

3. The negative photosensitive composition according to claim 2 , wherein the benzodifuranone-based black pigment represented by formula (2) or formula (3) includes a coating layer on the surface thereof, and the coating layer contains at least one coating material selected from the group consisting of silica, metal oxide and metal hydroxide.

4. The negative photosensitive composition according to claim 1 , wherein the resin having a structure represented by formula (16) contains a resin in which the value obtained by dividing (the total number of mols of repeating units containing an oxyalkylene group having 1 and 2 carbon atoms) by (the total number of mols of repeating units containing an oxyalkylene group having 3 to 5 carbon atoms) is 0.76 to 4.00.

5. The negative photosensitive composition according to claim 1 , further comprising (d) an alkali soluble resin that contains an alkali soluble polyimide resin and/or an alkali soluble epoxy (meth)acrylate resin.

6. The negative photosensitive composition according to claim 1 , wherein the component (b) further contains a resin having a structure represented by formula (22):

wherein, in formula (22),
A 15 O, A 16 O, OA 17 , OA 18 and OA 19 each independently represent an oxyalkylene group having 1 to 5 carbon atoms,
A 20 and A 21 each independently represent an alkylene group having 2 to 6 carbon atoms,
n 3 is an integer and represents 0 to 9,
X 11 to X 15 each independently represent a hydrogen atom, a hydrocarbon group having 1 to 5 carbon atoms, a group represented by formula (23) or a group represented by formula (24), in which at least one of X 11 and X 12 and at least one of X 13 and X 14 is an organic group represented by formula (23) or an organic group represented by formula (24), and
a 63 to a 67 are integers and each independently represent 1 to 100:

wherein, in formula (23),
* represents a bonding site to an oxygen atom, and
X 16 represents a hydrogen atom or a methyl group; and

wherein, in formula (24),
* represents a bonding site to an oxygen atom,
X 17 represents a hydrogen atom or a methyl group,
A 22 O represents an oxyalkylene group having 1 to 5 carbon atoms, and
a 68 is an integer and represents 1 to 5.

7. The negative photosensitive composition according to claim 5 , wherein the component (d) further contains an alkali soluble acrylic resin including a structural unit represented by formula (39):

wherein, in formula (39),
R 24 represents a hydrogen atom or a methyl group, and
R 25 is a divalent linking group and represents a hydrocarbon group having 2 to 6 carbon atoms.

8. The photosensitive composition or the negative photosensitive composition according to claim 1 , which is used for forming a pixel division layer.

9. A pixel division layer comprising a cured product of the photosensitive composition or the negative photosensitive composition according to claim 1 .

10. An organic EL display device comprising, in addition to the pixel division layer according to claim 9 , a first electrode, a light emitting pixel and a second electrode, wherein the first electrode includes a silver alloy film.

11. An organic EL display device comprising a pixel division layer containing a resin which has two or more tertiary amino groups in the molecule and has a structure represented by formula (16):

wherein, in formula (16),
* represents a bonding site to a carbon atom,
A 5 O, A 6 O,oA 7 and OA 8 each independently represent an oxyalkylene group having 1 to 5 carbon atoms,
A 9 and A 10 each independently represent an alkylene group having 2 to 6 carbon atoms,
n 1 is an integer and represents 0 to 7,
X 3 to X 6 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, and
a 19 to a 22 are integers and each independently represent 1 to 100.

12. The organic EL display device according to claim 11 , wherein the organic EL display device is a top emission type.

13. The organic EL display device according to claim 11 , wherein the pixel division layer includes a thin film portion having a thickness of 0.5 1 μm or more and less than 2.0 1 μm and a thick film portion having a thickness of 2.0 μm or more and 5.0 1 μm or less, and also includes a portion in which a difference in thickness between the thin film portion and the thick film portion is 1.0 1 μm or more.

14. The photosensitive composition or the negative photosensitive composition according to claim 2 , wherein in formula (16) n 1 is an integer and represents 1 to 7.

Assignees

• Toray Industries

Inventors

• Ishikawa Akihiro
• Honma Takashi
• Momiyama Yoko

Classifications

• H10K59/8792

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

• G03F7/0048 Primary

  characterised by the solvents or agents facilitating spreading, e.g. tensio-active agents · CPC title

• C09C3/063 Primary

  Coating · CPC title

• H10K59/122

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

• C09B67/0007

  with inorganic coatings · CPC title