Thermosetting Coloring Composition for High-Definition Color Filters
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Solution Overview
Problem
Conventional methods for manufacturing color filters for solid-state imaging elements face challenges in avoiding damage to the organic film layer during the stripping of photoresist, particularly with dry etching processes, where the stripping liquid can harm the organic film.
Innovation Solution
A thermosetting coloring composition is developed, comprising a pigment, a dispersant with acidic and basic functional groups, and a glycidyl etherified epoxy compound of sorbitol, which provides resistance to stripping liquids and enables effective dry etching for high-definition color filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dry etching is used to form organic patterns for high definition, then resolution and thinness are improved, but the organic film layer is damaged during photoresist stripping
Solution Approach 1:
The invention changes the chemical composition parameters of the colored layer by incorporating specific compounds (carboxyl-containing compound, hydroxyl-containing compound, or amino-containing compound) into the coloring composition. This modification alters the film's chemical properties to resist stripping liquid, thereby resolving the damage issue while maintaining the ability to achieve high-resolution patterns through dry etching
Solution Approach 2:
The invention creates a composite colored layer by combining the coloring composition with specific functional compounds (carboxyl-containing, hydroxyl-containing, or amino-containing compounds). This composite structure provides both the coloration function and the enhanced resistance to stripping liquid, allowing the organic film to withstand the photoresist stripping process after dry etching
2Reliability
If photolithography is used to maintain color separation performance, then color shading characteristics are improved, but it is difficult to achieve both thinness and high resolution simultaneously
Solution Approach 1:
The invention replaces the photolithography process with dry etching for pattern formation. By using the specific coloring composition that provides inherent resistance to stripping liquid, the process transitions from chemical development (photolithography) to physical etching (dry etching), enabling better control over pattern dimensions and achieving both thinness and high resolution while maintaining color separation performance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition effectively prevents damage to the organic film layer during photoresist stripping, ensuring high resistance to stripping liquids and enabling the formation of high-definition color filters with improved resolution and stability.
Implementation Method 1
the thermosetting compound (C) contains a glycidyl esterified epoxy compound of sorbitol
Implementation Method 2
the dispersant (B) contains a dispersant (b1) having an acidic functional group and/or a dispersant (b2) having a basic functional group
Implementation Method 3
forming a colored layer using the thermosetting coloring composition
Data Source
Figure 1~4
Figure 5
AI summary
The objective of the present invention is to provide a thermosetting coloring composition for color filters for solid-state imaging elements, which exhibits excellent resistance to a remover liquid; and a method for producing a color filter using this coloring composition. The objective is able to be achieved by a thermosetting coloring composition which is used for the production of a color filter for solid-state imaging elements, said color filter being provided with a color pattern (5) that is obtained by patterning a colored layer (2) by means of dry etching, and which is characterized by containing a pigment (A), a dispersant (B), a thermosetting compound (C) and a solvent (D), while being also characterized in that: the ratio of the pigment (A) relative to the total solid content of the thermosetting coloring composition is 50% by mass or more; the dispersant (B) contains a dispersant (b1) having an acidic functional group and/or a dispersant (b2) having a basic functional group, and the thermosetting compound (C) contains a glycidyl esterified epoxy compound of sorbitol.