Photosensitive Resin Composition for Ultra-Fine Color Filter Patterns
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Solution Overview
Problem
Existing color filter technologies face challenges in achieving ultra-fine square patterns with high resolution and minimal residue on unexposed areas, while also ensuring good heat resistance and color fastness, as current methods often result in deteriorated durability and heat resistance.
Innovation Solution
A color filter photosensitive resin composition comprising an acryl-based binder resin with a carboxyl group and an acryl-based photopolymerizable monomer, both incorporating a blue dye functional group, along with a photopolymerization initiator and solvent, which improves heat resistance, color fastness, and uniformity, enabling the formation of ultra-fine square patterns with minimal residue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If dyeing method is used to form colored thin film, then color vividness is improved, but heat resistance and durability deteriorate
Solution Approach 1:
The patent combines the dyeing method and pigment dispersion method into a hybrid approach. The composition includes both dye (for color vividness) and pigment (for heat resistance), along with a photopolymerizable resin that forms a durable matrix. This merging allows the color filter to achieve both vivid colors and improved thermal stability.
Solution Approach 2:
The invention uses a composite material system consisting of dye, pigment, photopolymerizable resin, and crosslinking agent. This composite structure allows the dye to provide color vividness while the pigment and resin matrix provide heat resistance and durability, resolving the contradiction between color quality and thermal stability.
2Quantity of substance
If printing method is used to form colored thin film, then material cost is reduced, but manufacturing precision and film uniformity deteriorate
Solution Approach 1:
The patent replaces the mechanical printing process with a photopolymerization-based formation process. The composition is applied as a coating and then cured through photopolymerization, eliminating the need for complex printing equipment while achieving fine image precision and uniform film thickness. This substitution maintains low material costs while dramatically improving manufacturing precision.
Solution Approach 2:
The invention changes the key parameter from mechanical deposition to photopolymerization curing. By controlling the photopolymerization process through initiators and UV exposure, the method achieves precise pattern formation and uniform film thickness without requiring expensive printing equipment, thus improving manufacturing precision while maintaining cost-effectiveness.
3Reliability
If electrophoretic deposition is used to form color film, then heat resistance is improved, but manufacturing precision for fine patterns deteriorates
Solution Approach 1:
The patent replaces the electrophoretic deposition process with a photopolymerization-based process. Instead of using electrical fields to deposit pigment, the composition uses photopolymerizable monomers that cure upon UV exposure, enabling precise pattern formation through photomasks while maintaining heat resistance through the crosslinked polymer matrix.
Solution Approach 2:
The invention changes the formation mechanism from electrophoretic movement to photopolymerization. This parameter change allows for finer pattern resolution through optical masking while maintaining the thermal stability provided by the crosslinked resin structure, thus resolving the contradiction between heat resistance and pattern fineness.
4Manufacturing precision
If conventional photosensitive resin composition is used, then color filter can be formed, but ultra-fine square patterns with minimal residue cannot be achieved
Solution Approach 1:
The patent optimizes several parameters: uses low molecular weight photopolymerizable monomers for better penetration and finer pattern resolution, incorporates specific photopolymerization initiators for complete curing, and adds crosslinking agents for minimal residue. These parameter changes enable ultra-fine square patterns with high resolution and minimal residue on unexposed areas.
Solution Approach 2:
The invention uses a composite photopolymer system including photopolymerizable monomers, oligomers, initiators, and crosslinking agents. This composite material system provides both the resolution needed for ultra-fine patterns and the complete curing necessary to minimize residue, resolving the contradiction between pattern fineness and residue formation.
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 forms ultra-fine square patterns with high resolution and minimal residue on unexposed areas, enhancing heat resistance and color fastness, thereby improving the overall quality and durability of the color filter.
Implementation Method 1
a photopolymerization initiator, and a solvent, where at least one of the acryl-based binder resin or the acryl-based photopolymerizable monomer includes a blue dye functional group
Data Source
AI summary
Disclosed is a color filter photosensitive resin composition that includes (A) an acryl-based binder resin having at least one carboxyl group, (B) an acryl-based photopolymerizable monomer, (C) a photopolymerization initiator, and (D) a solvent, where at least one of the acryl-based binder resin or the acryl-based photopolymerizable monomer includes a blue dye functional group. The color filter photosensitive resin composition can be prepared into a color filter having uniformity, almost no residue, and high resolution due to ultrafine pixels of 1.4 μm or less.