# US 2018/0321591 A1 · Thermosetting coloring composition and method of producing color filter for solid-state imaging element

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- Number: US 2018/0321591 A1
- Document ID: US20180321591A1
- Status: Published application
- Kind: A1
- Application number: 16/033,236
- Filed: 2018-07-12
- Published: 2018-11-08
- Earliest claimed: 2016-01-14
- Assignees: Toyo Ink Sc Holdings Co., Ltd.; Toyocolor Co., Ltd.; Toppan Printing Co., Ltd.
- Applicants: Toyo Ink Sc Holdings Co., Ltd.; Toyocolor Co., Ltd.; Toppan Printing Co., Ltd
- Inventors: Kenji Hiki; Tomohiro Imoto; Satoshi Takahashi
- Web page: https://patentgrep.com/patent/US20180321591A1

## CPC

- G03F 7/425: {containing mineral alkaline compounds; containing organic basic compounds, e.g. quaternary ammonium compounds; containing heterocyclic basic compounds containing nitrogen}
- G02B 5/20: Filters (polarising elements G02B5/30)
- G03F 7/0007: {Filters, e.g. additive colour filters; Components for display devices}
- G03F 7/033: the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
- G03F 7/162: {Coating on a rotating support, e.g. using a whirler or a spinner}
- G03F 7/168: {Finishing the coated layer, e.g. drying, baking, soaking}
- G03F 7/20: Exposure; Apparatus therefor (photographic printing apparatus for making copies G03B27/00)
- G03F 7/26: Processing photosensitive materials; Apparatus therefor (G03F7/12 - G03F7/24 take precedence)
- G03F 7/426: {containing organic halogen compounds; containing organic sulfonic acids or salts thereof; containing sulfoxides}
- H10F 39/024: {of coatings or optical elements}
- H10F 39/8053: {Colour filters}
- G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION

## 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.

## Claims

### 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 2)

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.

### Claim 4 (depends on 1)

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.

### Claim 5 (depends on 4)

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

### Claim 6 (depends on 1)

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.

### Claim 7 (depends on 6)

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

### Claim 8 (depends on 6)

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.

### Claim 9 (depends on 1)

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.

### Claim 10 (depends on 9)

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.

### Claim 11 (depends on 10)

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.