Photosensitive Resin Composition for OLED Patterning
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Solution Overview
Problem
Current organic light emitting display devices face challenges in achieving optimal reflow characteristics during the patterning process due to high heat resistance requirements, which can lead to defects and inefficiencies in manufacturing.
Innovation Solution
A photosensitive resin composition is developed, comprising a silsesquioxane-based copolymer, a photosensitive compound, and a solvent, with specific chemical formulations and weight ratios, that provides a low heat resistant characteristic while maintaining sufficient photosensitivity and coating properties, allowing for excellent reflow characteristics during the patterning of electrodes and pixel defining layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high heat resistance materials are used in the patterning process, then thermal stability is improved, but reflow characteristics deteriorate leading to manufacturing defects
Solution Approach 1:
The patent modifies the chemical composition parameters of the resin material by incorporating specific silsesquioxane-based copolymers with controlled molecular weights (2,000-10,000) and dispersion degrees (1.5-5.0), which changes the material's thermal response characteristics to achieve both heat resistance and reflow capability
Solution Approach 2:
The patent creates a composite photosensitive resin composition combining silsesquoxane-based copolymer, photosensitive compound, and solvent in specific weight ratios (20-50 wt% polymer, 20-30 wt% photosensitive compound, 20-60 wt% solvent), where the synergistic interaction between components achieves both thermal stability and reflow characteristics
2Stability of the object's composition
If high heat resistance is maintained during patterning, then material stability is improved, but reflow capability deteriorates causing process inefficiency
Solution Approach 1:
The patent introduces dynamic thermal response characteristics where the resin composition maintains stability at processing temperatures but exhibits reflow behavior at specific temperature ranges (150-200°C glass transition temperature), allowing adaptive response to different process conditions
Solution Approach 2:
The patent utilizes phase transition properties of the silsesquioxane-based copolymer with glass transition temperature of 150-200°C, where the material transitions from a rigid state during processing to a reflow state during heating, enabling both stability and reflow capability
3Reliability
If excessive heat is applied for patterning, then complete curing is achieved, but electrode edges suffer heat damage
Solution Approach 1:
The patent replaces thermal curing with photopolymerization using photosensitive compounds that cure upon light exposure, eliminating the need for high-heat processing while achieving complete curing and avoiding thermal damage to electrode edges
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 enables effective reflow and patterning of organic light emitting display devices at lower temperatures, reducing the risk of defects and simplifying the manufacturing process by achieving the desired shape and coverage of electrode edges without excessive heat damage.
Implementation Method 1
provides a low heat resistant characteristic while maintaining sufficient photosensitivity and coating properties, allowing for excellent reflow characteristics during the patterning of electrodes and pixel defining layers
Implementation Method 2
maintaining sufficient photosensitivity and coating properties, allowing for excellent reflow characteristics during the patterning
Data Source
AI summary
A photosensitive resin composition, an organic light emitting display device, and method for manufacturing an organic light emitting device, the composition including a photosensitive compound; a solvent; and a silsesquioxane-based copolymer, the silsesquioxane-based copolymer being obtained by copolymerizing a compound represented by the following Chemical Formula 1 with at least one of a compound represented by the following Chemical Formula 2, and a compound represented by the following Chemical Formula 3;R1—R2—Si(R3)3 [Chemical Formula 1]R4—Si(R5)3 [Chemical Formula 2]Si(R6)4. [Chemical Formula 3]