Photosensitive Resin Composition Leveling Agent Optimization
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Solution Overview
Problem
Existing photosensitive resin compositions for color filters in CMOS image sensors face challenges in achieving uniform coating and surface smoothness due to variations in coating thickness, leading to deteriorated patterns and low surface quality.
Innovation Solution
A photosensitive resin composition is developed that includes a leveling agent, such as a fluorine surfactant, within a specific concentration range (15 ppm to 30 ppm) to improve coating uniformity, combined with a binder resin, photopolymerizable compound, photopolymerization initiator, and solvent, which helps in forming a uniformly coated photosensitive resin layer and color filter with excellent surface smoothness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a photosensitive resin composition is coated on a substrate to form a color filter, then the color filter can be manufactured, but variations in coating thickness occur leading to deteriorated patterns and low surface quality
Solution Approach 1:
The patent optimizes the concentration of leveling agent in the photosensitive resin composition from conventional levels to a specific range (15-30 ppm based on total composition), which changes the surface tension parameters to achieve uniform coating thickness and smooth surface without variations
Solution Approach 2:
The patent introduces a leveling agent as an intermediary substance that mediates between the photosensitive resin composition and the substrate surface, reducing surface tension and preventing coating defects that lead to thickness variations and poor surface quality
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 optimized composition ensures uniform coating and enhanced surface smoothness of the color filter, contributing to improved image quality in CMOS image sensors by maintaining a predetermined level of image sensor quality.
Implementation Method 1
a photopolymerizable compound; a photopolymerization initiator
Implementation Method 2
the additive includes a leveling agent, and the leveling agent is included in an amount of about 15 ppm to about 30 ppm
Data Source
AI summary
A photosensitive resin composition includes an additive; a binder resin; a photopolymerizable compound; a photopolymerization initiator; a colorant; and a solvent, wherein the additive includes a leveling agent, and the leveling agent is included in an amount of about 15 ppm to about 30 ppm, based on a total amount of the photosensitive resin composition.