Substrate Stacking Layout for Friction-Free Laser Cutting
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Solution Overview
Problem
Conventional substrate-cutting methods for flexible display devices often result in substrate damage due to vibrations during the cutting process.
Innovation Solution
A substrate-cutting method involving a substrate-stacking structure with an adhesive layer interposed between substrates, where the adhesive layer is positioned within active areas and does not overlap the cutting lines, preventing friction and damage during laser cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If substrates are stacked closely together for mass production cutting, then productivity is improved, but substrate damage due to friction increases
Solution Approach 1:
An adhesive layer is introduced as an intermediary substance between stacked substrates. This adhesive layer serves as a mediator that reduces direct contact and friction between substrates during laser cutting, preventing substrate damage while enabling close stacking for mass production efficiency.
Solution Approach 2:
The adhesive layer is strategically positioned only in specific regions (within active areas and outside cutting lines) rather than covering the entire substrate surface. This segmented approach allows substrates to be stacked closely for efficient cutting while preventing friction and damage at critical locations.
2Stability of the object's composition
If adhesive layer is placed within active areas, then substrate stability during cutting is improved, but adhesive material usage increases
Solution Approach 1:
The adhesive layer is applied selectively only within the active areas of the substrates, specifically in regions that do not overlap with cutting lines. This localized application provides stability where needed while avoiding unnecessary adhesive material usage in non-critical areas.
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 method effectively prevents substrate damage by reducing friction between stacked substrates during cutting, thereby improving process efficiency and reliability.
Implementation Method 1
cutting the second substrate along a second cutting line, where the second cutting line corresponds to a boundary between the second active areas and the second non-active area, using a laser beam
Implementation Method 2
forming an adhesive layer on the first substrate where the adhesive layer is disposed within the first active areas
Data Source
AI summary
A substrate-cutting method includes preparing a first substrate in which a plurality of first active areas spaced apart from each other and a first non-active area surrounding the first active areas are defined in a plane, forming an adhesive layer on the first substrate where the adhesive layer is disposed within the first active areas, disposing a second substrate in which a plurality of second active areas spaced apart from each other and a second non-active area surrounding the second active areas are defined in the plane, and cutting a cutting line of the second substrate, which corresponds to a boundary between the second active areas and the second non-active area, using a laser beam. The adhesive layer does not overlap the cutting line of the second substrate.