Color Filter Adhesion via Organosilane Coupling Agent
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Solution Overview
Problem
In the production of color filters for LCDs and solid-state image sensing devices, the increased pigment concentration and dispersant ratio lead to a decrease in photopolymerization initiator and photopolymerizable monomer content, resulting in insufficient adhesion between pigment and inorganic substrates, making pattern formation difficult.
Innovation Solution
A method involving the application of an adhesion auxiliary agent onto an inorganic material, followed by a curable layer formation using a composition containing an organosilane compound, photopolymerization initiator, and pigment, which is then exposed pattern-wise and developed to form a color pattern with improved adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pigment concentration is increased to enhance color purity and contrast, then image quality is improved, but adhesion between pigment and inorganic substrate becomes insufficient
Solution Approach 1:
The patent introduces a silane coupling agent as an intermediary substance between the inorganic substrate and the organic pigment. This coupling agent forms chemical bonds with both the inorganic substrate and the organic pigment, creating a strong interfacial connection that maintains adhesion even at high pigment concentrations where direct adhesion would be insufficient.
Solution Approach 2:
The patent modifies the chemical composition parameters of the curable composition by incorporating specific silane coupling agents and adjusting the ratio of photopolymerizable monomer to pigment. This parameter change enables the composition to maintain both high pigment concentration for color purity and sufficient adhesion through the coupling agent's chemical bonding capability.
2Manufacturing precision
If pigment particles are reduced to enhance contrast, then image quality is improved, but the relative content of photopolymerization initiator and photopolymerizable monomer decreases
Solution Approach 1:
The patent adjusts the compositional parameters by incorporating silane coupling agents that can function at low concentrations. This allows the formulation to maintain adequate photopolymerization initiator and monomer content even when pigment particle size is reduced and pigment concentration is increased, as the coupling agent compensates for the reduced amount of traditional adhesion promoters.
3Stability of the object's composition
If dispersant content is increased to disperse finer pigment particles, then pigment dispersion is improved, but the relative content of photopolymerization initiator and photopolymerizable monomer decreases
Solution Approach 1:
The silane coupling agent acts as an intermediary that facilitates pigment dispersion while maintaining sufficient photopolymerizable components. The coupling agent's dual affinity for inorganic substrates and organic pigments allows it to stabilize pigment dispersion without requiring excessive dispersant that would dilute the photopolymerization initiator and monomer content.
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
This method enhances the adhesion of the color pattern to the inorganic substrate, reduces development residue, and increases productivity by simplifying the process while maintaining high resolution and image quality.
Implementation Method 1
forming a curable layer on the inorganic material to which the adhesion auxiliary agent has been applied by applying a curable pigment composition containing an organosilane compound
Implementation Method 2
a curable layer formation using a composition containing an organosilane compound, photopolymerization initiator, and pigment, which is then exposed pattern-wise
Data Source
AI summary
The present invention provides a method for producing a color filter, the method including: applying an adhesion auxiliary agent onto an inorganic material; forming a curable layer on the inorganic material to which the adhesion auxiliary agent has been applied by applying a curable pigment composition containing an organosilane compound (A) represented by Formula (I) below (wherein L is a monovalent organic group; R1 and R2 are hydrocarbon groups; and n is an integer from 1 to 3), a photopolymerization initiator (B), a compound (C) having an ethylenically unsaturated double bond, and a pigment (D); exposing the curable layer to light in a pattern using a mask; and a developing the curable layer after exposure to form a color pattern.