Foldable Package Structure With Ultra-Thin Glass Barrier
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Solution Overview
Problem
Foldable display packaging technologies face challenges in maintaining a moisture barrier and preventing cracks or rupture during repeated folding, especially when containing environmental-sensitive electronic components like OLEDs, which require protection from environmental temperature and humidity.
Innovation Solution
A foldable package structure comprising laminated substrates and adhesive layers with ultra-thin glass plates positioned away from folded regions to reinforce rigidity and moisture blocking, while sidewall barrier structures and reinforced barrier layers enhance the barrier effect without hindering folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultra-thin glass plates are used to reinforce rigidity and moisture blocking, then the barrier effect is improved, but the structure becomes more prone to cracks or rupture during repeated folding
Solution Approach 1:
The ultra-thin glass plate is divided into multiple separate pieces rather than using a single continuous plate. This segmentation allows the glass pieces to be positioned away from the folded region, preventing cracks while maintaining moisture barrier effectiveness in the non-folded areas.
Solution Approach 2:
Different regions of the package structure are treated differently: ultra-thin glass plates are placed in non-folded regions to provide moisture barrier, while the folded region is left without glass plates to allow flexible deformation without cracking. This local differentiation optimizes both barrier performance and foldability.
2Reliability
If the package structure is made rigid to protect environmental-sensitive components, then component protection is improved, but the structure cannot withstand repeated folding
Solution Approach 1:
The package structure applies different properties to different regions: rigid ultra-thin glass plates are placed in non-folded regions to protect components from environmental factors, while the folded region maintains flexibility to withstand repeated bending. This local differentiation resolves the contradiction between rigidity and foldability.
Solution Approach 2:
The structure is segmented into folded and non-folded regions, with ultra-thin glass plates selectively placed only in non-folded regions. This segmentation allows the structure to be both protective and flexible, as the rigid elements are isolated from the deformation zone.
3Reliability
If ultra-thin glass plates are positioned to maximize moisture barrier coverage, then barrier effect is improved, but the structure hinders folding movement
Solution Approach 1:
Ultra-thin glass plates are selectively positioned in non-folded regions where moisture barrier is most critical, while the folded region is kept free of glass plates to ensure smooth folding movement. This local placement strategy maximizes barrier effectiveness without compromising foldability.
Solution Approach 2:
The ultra-thin glass plate is segmented into multiple pieces positioned in specific non-folded regions rather than covering the entire structure. This segmentation allows folding movement in the designated region while maintaining moisture barrier coverage in the non-folded areas.
Data Source
AI summary
A foldable package structure including a first substrate, a second substrate, a plurality of adhesive layers and at least one environmental-sensitive electronic component is provided. At least one of the first and second laminated substrates comprises an ultra-thin glass plate. The foldable package structure comprises a predetermined folded region and the ultra-thin glass plate is disposed at one side of the predetermined folded region and stays away from the predetermined folded region.