Silicon Polymer Planarization Layer for Plastic Substrate Thermal Stability
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Solution Overview
Problem
Plastic substrates in display devices are prone to defects such as scratches and thermal decomposition due to weak heat resistance, which affects the reliability and durability of the devices.
Innovation Solution
A silicon-containing polymer planarization layer with a Si—O bond is applied to the plastic substrate, providing thermal stability and protecting the surface from mechanical and thermal impacts, while also preventing oxygen and moisture infiltration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a plastic substrate is used to achieve lightness and flexibility, then portability and safety are improved, but heat resistance and surface durability deteriorate
Solution Approach 1:
The patent applies a composite structure consisting of a plastic substrate combined with a planarization layer containing silicon-containing polymer. This composite material approach allows the substrate to maintain the lightness and flexibility of plastic while the planarization layer provides enhanced surface durability, heat resistance, and protection against scratches and mechanical damage.
2Ease of manufacture
If a plastic substrate is used to reduce manufacturing cost, then production cost is reduced, but thermal decomposition resistance deteriorates
Solution Approach 1:
The patent combines cost-effective plastic substrate materials with a planarization layer containing silicon-containing polymer. The plastic substrate maintains low manufacturing costs through deposition or printing processes, while the planarization layer provides the necessary thermal decomposition resistance, allowing the composite structure to withstand high temperatures without deteriorating.
3Reliability
If a planarization layer with silicon-containing polymer is applied to improve surface durability, then scratch resistance is improved, but device complexity increases
Solution Approach 1:
The patent applies the planarization layer containing silicon-containing polymer as a preliminary protective measure before the display device undergoes subsequent manufacturing processes. This pre-applied layer proactively protects the plastic substrate from scratches and mechanical damage that may occur during handling and processing, thereby improving surface durability without requiring complex structural modifications.
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 silicon-containing polymer planarization layer enhances the reliability of the display device by reducing surface defects, maintaining mechanical strength, and preventing thermal distortion, thus ensuring the stability and performance of the device.
Implementation Method 1
the silicon-containing polymer may be made from a compound that forms a thin layer having a Si—O bond after undergoing heat treatment of a compound
Implementation Method 2
the plastic substrate may be deteriorated due to permeability and oxygen transmission of a plastic material
Data Source
AI summary
In an aspect, a substrate for a display device that includes a plastic substrate and a planarization layer is provided.