Transparent Epoxy Resin Composition for Display Gap Filling
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Solution Overview
Problem
Epoxy resin is vulnerable to high temperature and humidity, brittle, and has limited reworkability, which affects its reliability and adhesiveness in display devices.
Innovation Solution
A one-component epoxy resin composition comprising a first and second epoxy resin, a thermal curing agent, and an optional additive, which provides high transparency, adhesiveness, and reliability by ensuring a transmittance of 90% or more, a refractive index of 1.4 or more, and a weight loss of less than 1%, with a curing process that forms a long fibrous molecular structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If epoxy resin is used for its high adhesiveness and mechanical properties, then reliability is improved, but vulnerability to high temperature and humidity increases
Solution Approach 1:
The patent uses a composite resin system combining epoxy resin with other resin components to create a material that maintains the high adhesiveness of epoxy while reducing its vulnerability to high temperature and humidity. This composite approach allows the formulation to achieve both desired adhesion and improved environmental stability.
2Strength
If epoxy resin is used for its mechanical properties, then strength is improved, but brittleness increases making it easily destroyed by impact
Solution Approach 1:
The patent modifies the chemical composition parameters of the resin system by incorporating additional resin components alongside epoxy resin. This changes the molecular structure and crosslinking density, thereby maintaining mechanical strength while reducing brittleness and improving impact resistance.
3Illumination intensity
If epoxy resin is used for its transparency, then optical properties are improved, but moisture absorption after curing increases
Solution Approach 1:
The patent introduces additional resin components that act as intermediaries in the cured network structure. These components help reduce the hygroscopic nature of the epoxy resin while maintaining its optical transparency, effectively mediating between the desire for clarity and resistance to moisture absorption.
4Reliability
If epoxy resin is used for its chemical resistance, then corrosion resistance is improved, but reworkability after curing decreases
Solution Approach 1:
The patent creates a more dynamic and flexible cured network by incorporating additional resin components that provide different bonding characteristics. This allows the material to maintain chemical resistance while introducing some flexibility that improves reworkability and repairability after curing.
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 maintains mechanical, chemical, and thermal properties while being transparent, with improved adhesiveness and reliability, suitable for display devices, and exhibits good processability and productivity.
Implementation Method 1
epoxy resin is a typical thermosetting resin having a three-dimensional network structure that is transformed from a linear structure through a curing process
Data Source
AI summary
The present invention relates to a resin composition and an epoxy resin composition for display comprising the resin composition. More particularly, the present invention provides a transparent epoxy material that can be applied by various methods such as ink-jetting, dispensing, etc. to fill a gap by spraying a low-viscosity liquid and then be cured. The transparent epoxy material generates a little amount of gas during curing, has high reliability at high temperature and high humidity after curing so that there is no cracking between layers, and can be used in applications such as molding and bonding of glass parts of organic or inorganic light emitting display. The epoxy resin composition according to the present invention not only has excellent processability and excellent electrical, mechanical, and chemical properties of the existing liquid epoxy material, and but also as good optical properties, thereby providing workability, productivity, and reliability to a user working on packaging of organic light emitting displays.