Acrylic Photocurable Composition for Defect-Free Resist Films
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Solution Overview
Problem
Conventional photocurable acrylate compositions used in liquid crystal display apparatuses suffer from poor solubility, low thermal stability, low photosensing activity, and incomplete photocurability, leading to high defective rates, pollution, and increased production costs, which do not meet the demands of micro-electronic technology and environmental protection.
Innovation Solution
A photocurable acrylate composition incorporating a novel oxime ester photoinitiator, specific acrylate monomers, and polymers, which provides high curing speed, low pollution, low energy consumption, and high exposure efficiency, resulting in defect-free and high-hardness image patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional acrylate compositions are used, then the composition can be applied in liquid crystal display apparatuses, but the composition exhibits poor solubility, low thermal stability, low photosensing activity, and incomplete photocurability
Solution Approach 1:
The patent changes the chemical parameters of the composition by introducing a novel oxime ester photoinitiator with specific molecular structure (formula I), along with specific acrylate monomers and polymers in optimized ratios. This parameter change transforms the composition from incomplete photocure to complete photocure, eliminating defective patterns and improving reliability.
Solution Approach 2:
The patent creates a composite photocurable composition by combining multiple components: novel oxime ester photoinitiator (formula I), specific acrylate monomers, and polymers with carboxylic acid groups. This composite material approach synergistically improves solubility, thermal stability, photosensing activity, and photocurability completeness, resolving the reliability issue.
2Productivity
If conventional photopolymerization is used, then the composition can be cured, but the process consumes high energy and produces pollution
Solution Approach 1:
The patent changes the photopolymerization parameters by introducing a novel oxime ester photoinitiator that activates at lower energy wavelengths. This enables complete curing at lower exposure doses, reducing energy consumption and minimizing harmful byproducts, thus improving productivity while reducing pollution.
3Duration of action of stationary object
If conventional acrylate compositions are used, then the composition can be stored, but the composition exhibits poor storage stability
Solution Approach 1:
The patent formulates a composite composition with novel oxime ester photoinitiator, specific acrylate monomers, and polymers that are chemically compatible. This composite structure prevents degradation reactions during storage, maintaining performance consistency and improving storage stability compared to conventional compositions.
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 achieves excellent storage stability, high exposure sensitivity, and precise, durable image patterns with low exposure doses, suitable for producing black matrices and photospacers with high light-shielding properties and optical transparency.
Implementation Method 1
a photocurable acrylate composition, containing a compound of formula (I) as a photoinitiator and components of an acrylate monomer and a polymer adapted to the photoinitiator. Upon photopolymerization, this photocurable composition has high curing speed
Implementation Method 2
the photoinitiator , the selected acrylate monomer and the polymer component have very excellent adaptability, exhibiting excellent application performance
Data Source
AI summary
A photocurable acrylate composition, containing a compound of formula (I) as a photoinitiator and the components adapted to the photoinitiator. The photocurable composition has very good storage stability and very high light sensitivity, can be cross-linked and cured at a very low exposure dose, and has a very good curing effect; a film made from the composition has a smooth edge, no defect and scum, and good integrity throughout the whole pattern, and is a high-hardness resist film, and an optical filter made therefrom has high optical transparency and no light leakage.