Coloring composition for solid-state imaging element

Patent metadata

Field	Value
Publication number	US-11614574-B2
Application number	US-201916581783-A
Country	US
Kind code	B2
Filing date	Sep 25, 2019
Priority date	Mar 29, 2017
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

A photosensitive green composition for a color filter of a solid-state imaging element, contains a colorant (A), a binder resin (B), a photopolymerization initiator (C), a photopolymerizable monomer (D), an ultraviolet absorber (E), and a monofunctional thiol (F), wherein the colorant (A) contains C.I. Pigment Green 36 and/or C.I. Pigment Green 58.

First claim

What is claimed is:

1. A photosensitive green composition for a color filter of a solid-state imaging element, comprising:
a colorant (A);
a binder resin (B);
a photopolymerization initiator (C);
a photopolymerizable monomer (D);
an ultraviolet absorber (E); and
a monofunctional thiol (F),
wherein the colorant (A) comprises C.I. Pigment Green 36, C.I. Pigment Green 58, and/or C.I. Pigment Yellow 150, and
the monofunctional thiol (F) comprises 2-mercapto-5-methylthio-1,3,4-thiadiazole or triphenylmethanethiol, and
a content of the monofunctional thiol (F) is 0.05 to 3.00% by weight in a total solid content of the photosensitive green composition.

2. The photosensitive green composition for a color filter of a solid-state imaging element according to claim 1 , wherein the photopolymerizable monomer (D) comprises a urethane acrylate, and the urethane acrylate is a compound obtained by reacting a compound represented by a general formula (1) with a polyfunctional isocyanate represented by a general formula (2),
the general formula (1) being

wherein R 1 , R 2 , R 3 independently represent an acryloyl group or a methacryloyl group, and
the general formula (2) being
o=C=N−X−N=C=O

wherein X represents a divalent alkylene group or an arylene group.

3. The photosensitive green composition for a color filter of a solid-state imaging element according to claim 1 , wherein a content of the ultraviolet absorber (E) is 0.05 to 3.00% by weight in a total solid content of the photosensitive green coloring composition.

4. The photosensitive green composition for a color filter of a solid-state imaging element according to claim 1 , wherein the ultraviolet absorber (E) comprises an ultraviolet absorber having an absorbance at a wavelength of 365 nm of 0.4 or more measured when dissolved in chloroform to be diluted to 10 mg/L.

5. The photosensitive green composition for a color filter of a solid-state imaging element according to claim 1 , wherein the ultraviolet absorber (E) comprises at least one selected from benzotriazole-based compounds, benzophenone-based compounds, and triazine-based compounds.

6. The photosensitive green composition for a color filter of a solid-state imaging element according to claim 1 , wherein a content of the colorant (A) is 40 to 70% by weight in a total solid content of the photosensitive green composition.

7. The photosensitive green composition for a color filter of a solid-state imaging element according to claim 1 , wherein a content of the photopolymerization initiator (C) is 0.3 to 5.0% by weight in a total solid content of the photosensitive green composition.

8. The photosensitive green composition for a color filter of a solid-state imaging element according to claim 1 , wherein the photopolymerization initiator (C) comprises an oxime ester-based photopolymerization initiator.

9. A color filter for a solid-state imaging element, comprising a filter segment made from the photosensitive green composition for a color filter of a solid-state imaging element as defined in claim 1 on a base material.

10. A solid-state imaging element comprising the color filter for a solid-state imaging element as defined in claim 9 .

11. The photosensitive green composition for a color filter of a solid-state imaging element according to claim 1 , wherein the photopolymerizable monomer (D) comprises urethane acrylate and/or penta- or higher functional acrylate excluding urethane acrylate.

12. The photosensitive green composition for a color filter of a solid-state imaging element according to claim 11 , wherein a content of the photopolymerizable monomer (D) is 15 to 30% by weight with respect to a total solid content of the photosensitive green coloring composition, and a total content of the urethane acrylate and the penta- or higher functional acrylate excluding urethane acrylate is 50 to 90% by weight in a total solid content of the photopolymerizable monomer (D).

Assignees

• Toppan Printing Co Ltd

Inventors

• Chuko Tomotaka
• Hiki Kenji
• Doi Ryuji
• Kitazawa Kazushige
• Okamoto Shinichi
• Hirota Tetsuya
• Maeda Tadatoshi
• Chinone Hiroyuki

Classifications

• H10F39/12

  Image sensors · CPC title

• H10F39/8053

  Colour filters · CPC title

• C08F2/50

  with sensitising agents · CPC title

• C09D7/63

  organic · CPC title

• C09B67/009

  polymeric dispersing agent · CPC title