Photosensitive Resin Composition for LCD Color Filter Adhesion
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Solution Overview
Problem
Current photosensitive resin compositions face challenges in achieving high photosensitivity, developing properties, and adhesion strength, particularly in applications like color filter patterns for LCDs, where pattern taper angle and adhesion are critical for high resolution and defect-free production.
Innovation Solution
A polymer comprising specific repeating units, combined with a binder resin, polymerizable compounds, and photoinitiators, which enhances the photosensitivity and adhesion strength of the photosensitive resin composition, allowing for improved pattern formation and adhesion to substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional photosensitive resin compositions are used, then the basic photosensitivity and adhesion are maintained, but the photosensitivity and adhesion strength are insufficient for high-resolution applications
Solution Approach 1:
The patent employs composite materials by combining multiple polymer components with distinct functions: a first polymer containing carboxylic acid groups for adhesion, a second polymer providing mechanical properties, and a third polymer enhancing photosensitivity. This multi-component composite system simultaneously achieves high adhesion strength, excellent developing properties, and high photosensitivity required for high-resolution patterning
Solution Approach 2:
The invention applies local quality by incorporating specific functional groups at targeted locations within the polymer structure. Carboxylic acid groups are positioned to maximize adhesion to substrates, while lactone rings and other photoactive groups are distributed to optimize light sensitivity and developing behavior in specific regions of the resist coating
2Reliability
If the photosensitive resin composition is optimized for high photosensitivity, then the developing property improves, but the adhesion strength to substrate deteriorates
Solution Approach 1:
The patent utilizes parameter changes by systematically adjusting the molecular weight, functional group composition, and ratio of different polymer components. The carboxylic acid content, lactone ring structure, and polymer chain length are optimized to achieve the desired balance between photosensitivity, adhesion strength, and developing properties
Solution Approach 2:
The composite polymer system allows simultaneous optimization of conflicting properties: the first polymer component provides adhesion through carboxylic acid groups, while the second and third components enhance photosensitivity and developing behavior, creating a synergistic effect that resolves the trade-off between adhesion and photosensitivity
3Shape
If the taper angle is increased for better pattern definition, then the adhesion strength improves, but the pattern retention and defect reduction become challenging
Solution Approach 1:
The invention applies parameter changes by optimizing the glass transition temperature, molecular weight distribution, and functional group density of the polymer components. These parameter adjustments enable the formation of patterns with controlled taper angles while maintaining excellent adhesion and minimizing defects through optimized viscoelastic behavior during processing
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 polymer-based photosensitive resin composition exhibits high taper angles and excellent adhesion strength, enabling its application in various photosensitive materials, particularly in manufacturing color filter patterns for LCDs, with improved pattern retention and reduced defects.
Implementation Method 1
the photosensitive resin composition can be polymerized and cured by radiating light
Implementation Method 2
performing exposure on a predetermined portion of the coat by using a photomask and the like by light radiation
Data Source
AI summary
The present invention relates to a polymer having a novel structure and a photosensitive resin composition comprising the same. A photosensitive resin composition comprising a polymer according to the present invention has a high taper angle and excellent adhesion strength. Accordingly, the photosensitive resin composition comprising the polymer according to the present invention may be applied to various photosensitive materials, and particularly, may be preferably applied when a color filter pattern for LCD is manufactured.