Thermosetting coloring composition and method of producing color filter for solid-state imaging element

Patent metadata

Field	Value
Publication number	US-2018321591-A1
Application number	US-201816033236-A
Country	US
Kind code	A1
Filing date	Jul 12, 2018
Priority date	Jan 14, 2016
Publication date	Nov 8, 2018
Grant date	—

Abstract

A thermosetting coloring composition for manufacturing a color filter for a solid-state imaging element provided with a colored pattern formed by patterning a colored layer by dry etching is provided. The composition contains a pigment (A), a dispersant (B), a thermosetting compound (C), and a solvent (D). A ratio of the pigment (A) to a total solid content of the thermosetting coloring composition is 50 mass percent or more. The dispersant (B) contains a dispersant (b1) having an acidic functional group and/or a dispersant (b2) having a basic functional group. The thermosetting compound (C) contains a glycidyl etherified epoxy compound of sorbitol.

First claim

1 . A thermosetting coloring composition for manufacturing a color filter for a solid-state imaging element provided with a colored pattern formed by patterning a colored layer by dry etching, the composition comprising:
a pigment (A), a dispersant (B), a thermosetting compound (C), and a solvent (D), wherein a ratio of the pigment (A) to a total solid content of the thermosetting coloring composition is 50 mass percent or more, the dispersant (B) comprises a dispersant (b1) having an acidic functional group and/or a dispersant (b2) having a basic functional group, and the thermosetting compound (C) comprises a glycidyl etherified epoxy compound of sorbitol.

2 . The thermosetting coloring composition according to claim 1 , wherein the pigment (A) comprises a green pigment (a1).

3 . The thermosetting coloring composition according to claim 2 , wherein the green pigment comprises at least one selected from the group consisting of Pigment Green 7, Pigment Green 36, and Pigment Green 58.

4 . The thermosetting coloring composition according to claim 1 , wherein the solvent (D) comprises a solvent (d1) having a boiling point of 160° C. or higher.

5 . The thermosetting coloring composition according to claim 4 , wherein the solvent (d1) having a boiling point of 160° C. or higher is cyclohexanol acetate.

6 . The thermosetting coloring composition according to claim 1 , wherein the dispersant (B) comprises the dispersant (b1) having the acidic functional group, the dispersant (b1) having the acidic functional group has a segment (b1-A) obtained by polymerizing an ethylenic unsaturated monomer comprising (meth)acrylate, and a theoretical value of a glass transition temperature of the segment (b1-A) is 40° C. or higher.

7 . The thermosetting coloring composition according to claim 6 , wherein the acidic functional group is an aromatic carboxyl group.

8 . The thermosetting coloring composition according to claim 6 , wherein the theoretical value of the glass transition temperature of the segment (b1-A) is 80° C. or higher.

9 . A method of manufacturing a color filter for a solid-state imaging element, the method comprising:
(X) forming a colored layer using the thermosetting coloring composition according to claim 1 ; and (Y) patterning the colored layer by dry etching.

10 . The method according to claim 9 ,
wherein (X) includes (X-1) forming a coating film comprising the thermosetting coloring composition, and (X-2) thermally curing the coating film to obtain the colored layer, and (Y) includes (Y-1) forming a photoresist layer on the colored layer, (Y-2) patterning the photoresist layer by performing exposure and development to obtain a resist pattern, (Y-3) patterning the colored layer by dry etching using the resist pattern as an etching mask to form a colored pattern, and (Y-4) bringing a stripping liquid into contact with the resist pattern to remove the resist pattern from the colored pattern.

11 . The method according to claim 10 , wherein the stripping liquid comprises at least one selected from the group consisting of N-methylpyrrolidone, dimethylsulfoxide, and monoethanolamine.

Assignees

• Toyo Ink Sc Holdings Co Ltd
• Toyocolor Co Ltd
• Toppan Printing Co Ltd

Inventors

• Hiki Kenji
• Imoto Tomohiro
• Takahashi Satoshi

Classifications

• G03F7/426

  containing organic halogen compounds; containing organic sulfonic acids or salts thereof; containing sulfoxides · CPC title

• H01L27/14621

  Electricity · mapped topic

• G03F7/26

  Processing photosensitive materials; Apparatus therefor (G03F7/12 - G03F7/24 take precedence) · CPC title

• G03F7/20

  Exposure; Apparatus therefor (photographic printing apparatus for making copies G03B27/00) · CPC title

• G03F7/033

  the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers · CPC title