Color Filter Composition With Developer-Resistant Fine Pixels

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Solution Overview

Problem

As pixel size in solid-state imaging elements is miniaturized, they become more susceptible to damage by developers, leading to defects and the need for improved developer resistance in coloring compositions used in color filters.

Innovation Solution

A coloring composition comprising specific compounds, pigments, and resins, including graft or block copolymers with certain structural features, which form a strong intermolecular bond, enhancing developer resistance and film homogeneity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If pixel size is miniaturized, then productivity and resolution are improved, but developer resistance deteriorates causing defects

Engineering Contradiction:

Improvepixel miniaturizationVSAvoiddeveloper resistance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent modifies the chemical parameters of the coloring composition by introducing specific resin components with carboxyl groups that can form strong interactions with the pigment particles. This chemical parameter change enhances the film's developer resistance without affecting the pixel size, thereby resolving the contradiction between miniaturization and reliability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite material system by combining specific resins (with carboxyl groups) and pigments in defined ratios. This composite structure provides both the miniaturization capability and enhanced developer resistance, as the resin-pigment interaction strengthens the film matrix against developer attack while maintaining fine pixel dimensions

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If conventional coloring composition is used, then manufacturing is simple, but developer resistance is insufficient leading to defects

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoiddeveloper resistance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent changes the compositional parameters by specifying precise resin and pigment ratios (resin: pigment = 1:4 to 4:1 by weight). This parameter optimization maintains ease of manufacture through straightforward mixing while dramatically improving developer resistance through enhanced film formation

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If pixel size is reduced, then manufacturing precision is improved, but susceptibility to developer damage increases

Engineering Contradiction:

Improvepixel dimension controlVSAvoiddeveloper damage susceptibility

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent employs a composite material formulation where specific resins with carboxyl groups interact with pigments to create a robust film matrix. This composite structure provides mechanical and chemical strength that protects miniaturized pixels from developer damage while maintaining precise dimensional control

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS12529969B2Coloring composition, film, optical filter, solid-state imaging element, image display device, and compound

Publication Date: 2026.01.20 FUJIFILM CORP

AI summary

A coloring composition includes at least one compound S selected from a compound S-1 represented by Formula (1) or a compound S-2 in which the compound S-1 is coordinated to a metal atom, a pigment, a resin P, and a solvent, in which the resin P includes at least one selected from a graft resin P-1 having a specific graft chain, a block copolymer P-2 including a specific structure, or a resin P-3 in which at least one terminal of a polymer chain including a specific structure is capped with an acid group.