One Glass Solution Touch Screen Edge Tempering for Crack Prevention
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Solution Overview
Problem
The existing production process of One Glass Solution (OGS) touch screens faces low yield and efficiency due to stress release and edge cracks during the cutting process, which are not completely eliminated by current coating methods, leading to complex and time-consuming post-processing to address these issues.
Innovation Solution
A method involving forming a first film layer with hollow regions and a protection film on a substrate, tempering only the hollow regions, and then removing the protection film to prevent stress release during cutting, allowing for easier and more accurate cutting of OGS touch screens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the glass substrate is tempered and then cut according to design specification, then the single screen is produced, but cracks are generated in the cutting process due to stress release, resulting in low cutting yield
Solution Approach 1:
The patent applies preliminary action by tempering the edge regions of the glass substrate before cutting. This pre-tempering creates compressive stress in the edge areas that will be cut, preventing stress release and crack formation during the subsequent cutting process. The edge regions are tempered in advance to prepare them for cutting without generating cracks.
Solution Approach 2:
The patent applies local quality by differentiating the tempering treatment between different regions of the glass substrate. Only the edge regions (to be cut) are tempered, while the central region remains untempered. This localized tempering creates different stress states in different areas, allowing the edge regions to resist cracking during cutting while maintaining the overall integrity of the substrate.
2Object-affected harmful factors
If sealing glue is coated on the edges of the single screen to control stress release, then collision on residual edge cracks is prevented, but the stress release problem is not completely eliminated, requiring complex post-processing
Solution Approach 1:
The patent applies preliminary action by tempering the edge regions before cutting to prevent stress release and crack formation in the first place. This preventive approach eliminates the need for subsequent sealing glue coating and complex post-processing steps to address residual cracks, as the tempering treatment already prevents the problems from occurring.
Solution Approach 2:
The patent converts the potentially harmful stress release during cutting into a beneficial compressive stress state by pre-tempering the edge regions. The thermal tempering process creates compressive stresses that counteract the tensile stresses that would normally cause cracks during cutting, transforming what would be a harmful effect into a protective mechanism.
3Ease of operation
If the protection film is removed after tempering, then the hollow regions are exposed for cutting, but the cutting process still faces stress release issues without proper edge tempering
Solution Approach 1:
The patent applies preliminary action by tempering the edge regions before removing the protection film and performing cutting. This ensures that the edge regions are already in a stress-resistant state before the cutting operation begins, allowing for accurate and clean cuts without stress release or cracking, thereby improving both ease of operation and manufacturing precision.
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
This approach improves cutting process yield and production efficiency by preventing stress release and simplifying the manufacturing process, ensuring accurate alignment and reducing the complexity of edge crack management.
Implementation Method 1
tempering each hollow region by tempering the substrate
Implementation Method 2
cracks are generated in the cutting process due to stress release in the cutting process of the single screen
Data Source
AI summary
A method of preparing an OGS touch screen is disclosed. The method includes forming a first film layer on a provided substrate, where the first film layer includes at least one hollow region and a protection film surrounding each hollow region. The method also includes tempering each hollow region by tempering the substrate, and removing the protection film on the substrate.