Optical Panel Stack-Up Structure for Surface Planarization
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Solution Overview
Problem
The uneven surface of cover glasses in touch panels leads to cracks during lamination, resulting in air pockets and bubble formation, which causes defects in electronic products like mobile phones and computers.
Innovation Solution
A protective layer is coated on the laminating elements to flatten the surface, filling cracks and preventing air pockets from forming during the lamination process, thereby enhancing product yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If glue is applied directly to the uneven surface of the cover glass, then the lamination process can proceed, but bubbles are generated on the surface due to cracks and unevenness
Solution Approach 1:
A protective layer is applied to the cover glass surface before the lamination process to pre-fill surface cracks and unevenness. This preliminary action prevents bubble formation during subsequent glue application and lamination, eliminating the need for post-processing repairs and improving production yield.
Solution Approach 2:
The protective layer serves as an intermediary between the uneven cover glass surface and the glue. It fills surface defects and provides a flat interface for glue application, preventing air entrapment and bubble formation while maintaining the structural integrity of the cover glass.
2Device complexity
If the cover glass surface is left uneven, then the manufacturing process is simpler, but cracks occur and bubbles are generated causing product defects
Solution Approach 1:
The protective layer is applied in advance to the cover glass surface to fill cracks and unevenness before lamination. This preliminary protection measure ensures reliable bonding without bubble formation, improving product quality while adding only one simple coating step to the process.
3Manufacturing precision
If a protective layer is added to flatten the laminating face, then bubble formation is prevented, but the manufacturing process becomes more complex
Solution Approach 1:
The protective layer is applied as a preliminary step before lamination to ensure surface flatness. This single coating operation provides the necessary surface preparation, preventing bubble formation and eliminating the need for complex post-lamination repair processes.
Solution Approach 2:
The protective layer changes the surface parameters of the cover glass by filling cracks and unevenness, transforming the surface from uneven to flat. This parameter change is achieved through a simple coating process rather than complex mechanical or chemical treatments.
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 protective layer effectively planarizes the laminating surfaces, eliminating bubble formation and improving the manufacturing efficiency and quality of touch panels by ensuring a smooth adhesive layer application.
Implementation Method 1
a first protective layer (16) is formed on a laminating face... for flattening the first laminating face of the first laminating element (10)
Data Source
AI summary
The present disclosure relates to an optical panel, and more particularly, to a stack-up structure of an optical panel and the manufacturing method thereof, wherein the stack-up structure comprises: a first laminating element, which has a first laminating face; and a first protective layer, which is formed on the first laminating face of the first laminating element for flattening the first laminating face. The present disclosure allows a protective layer to be coated on a surface of a laminate to overcome unevenness problem on the surface of the laminating element, thereby avoiding generation of bubbles and enhancing the yield of products.