Substrate Edge Protection with Buffer and Hard Layer
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Solution Overview
Problem
Touch panels and display panels are prone to damage from edge impacts due to the concentration of stress on small areas, leading to cracks and operational issues.
Innovation Solution
A substrate structure incorporating a buffer layer and a protecting layer, where the buffer layer absorbs shock and the protecting layer provides additional protection against peeling or damage, with the protecting layer being harder than the buffer layer, and optionally including an inner protecting layer for enhanced protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the substrate edge is directly exposed without protection, then the device structure remains simple, but the substrate is prone to damage from edge impacts due to stress concentration
Solution Approach 1:
A buffer layer is applied to the substrate edge before final assembly, creating a cushioning effect that absorbs impact energy. This layer is positioned in advance to prevent stress concentration at the edge, thereby improving reliability without significantly complicating the overall device structure.
Solution Approach 2:
The substrate edge protection system uses a composite structure combining the substrate material with a buffer layer and optionally a protecting layer. This composite approach leverages the complementary properties of different materials to enhance impact resistance while maintaining structural integrity.
2Reliability
If a buffer layer is added to absorb shock, then the substrate protection is improved, but the device structure becomes more complex
Solution Approach 1:
The buffer layer is applied in advance to the substrate edge, creating a cushioning effect that absorbs impact energy before it reaches the substrate. This beforehand cushioning improves shock protection while the layer can be integrated into the existing manufacturing process.
Solution Approach 2:
The buffer layer functions as a flexible thin film that can deform to absorb impact energy. This flexible shell approach provides effective shock absorption without adding significant structural complexity or thickness to the overall device.
3Reliability
If a protecting layer with high hardness is added to prevent peeling, then the substrate edge protection is improved, but the device structure becomes more complex
Solution Approach 1:
The protecting layer is formulated as a composite material with high hardness and strong adhesion properties. This composite structure provides superior protection against peeling and edge damage while maintaining a relatively simple layered architecture that can be integrated into existing device structures.
Solution Approach 2:
The protecting layer is specifically applied to the substrate edge region where it is most needed for protection against peeling and impact. This localized application provides targeted protection without unnecessarily complicating the overall device structure or adding material to areas where protection is not required.
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 dual or triple-layer protection significantly reduces the impact force on the substrate, preventing damage and peeling, and enhancing the substrate's ability to withstand external shocks and scratches.
Implementation Method 1
The buffer layer absorbs the external shock for reducing the external force exerted on the substrate
Implementation Method 2
The protecting layer protects the shell of the substrate and the buffer layer from peeling or being damaged due to the external shock
Data Source
AI summary
A substrate structure includes a substrate, a buffer layer, and a protecting layer. The substrate includes a side surface. The buffer layer is disposed between the side surface of the substrate and the protecting layer, and the hardness of the protecting layer is greater than the hardness of the buffer layer.