Glass Substrate Edge Protection for Impact Crack Resistance
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Solution Overview
Problem
Glass substrates are prone to damage, defects, and cracks during transportation and processing due to their high stiffness, leading to processing losses and defects.
Innovation Solution
A substrate with a glass substrate and a protecting device featuring a polymer layer with a minimum thickness of 5 μm, integrated into the edge area with a groove part that penetrates the substrate, providing adhesive strength and pencil hardness, and UV-cured resin for impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a glass substrate with high stiffness is used for transportation and processing, then structural strength is improved, but susceptibility to impact damage and cracks increases
Solution Approach 1:
A protecting device comprising a polymer layer with a minimum thickness of 5 μm is disposed on the edge area of the glass substrate before impact occurs. This polymer layer acts as a cushioning element that absorbs and distributes impact forces, preventing direct transmission of shock to the glass substrate edges, thereby reducing the risk of cracks and damage during transportation and processing.
Solution Approach 2:
The invention creates a composite structure by combining the glass substrate with a polymer protecting layer. This composite design leverages the high stiffness and strength of glass while incorporating the shock-absorbing and damage-resistant properties of the polymer material, resulting in a hybrid structure that mitigates impact damage while maintaining structural integrity.
2Reliability
If the protecting device thickness is increased to improve impact resistance, then damage protection is enhanced, but device complexity and material usage increase
Solution Approach 1:
The invention optimizes the protecting device by specifying a minimum thickness parameter of 5 μm for the polymer layer. This parameter change ensures sufficient impact resistance while avoiding excessive thickness that would increase complexity. The defined thickness parameter balances protection effectiveness with device simplicity and manufacturing feasibility.
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 solution effectively minimizes damage to the glass substrate under impact, maintaining integrity even after repeated testing with pressures equivalent to multiple pin contacts, preventing cracks and enhancing durability during transportation and processing.
Implementation Method 1
The polymer layer may be an elastic layer
Implementation Method 2
The polymer layer may include an ultraviolet (UV) cured resin
Data Source
AI summary
A substrate comprising a glass substrate is provided. The glass substrate includes a first surface, a second surface, and an edge area connecting the first surface and the second surface; a groove part formed toward the inside direction of a glass substrate from a portion of the edge area; and a protecting device formed on the groove part, wherein the groove part penetrates the first surface and the second surface.