Flexible Display Substrate with Patterning for Adhesion
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Solution Overview
Problem
Conventional flexible display substrates face issues with insufficient adhesion strength between organic-inorganic layers, leading to film separation during the peeling-off process, which compromises the flexibility and water/oxygen blocking capabilities.
Innovation Solution
A manufacturing method involving the patterning of an inorganic separation layer between organic layers, using electrostatic spinning to create a mesh structure with gaps, allowing direct contact between inner organic layers and enhancing adhesion strength, thereby preventing film peeling and improving water/oxygen blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stacked flexible substrate with organic-inorganic-organic-inorganic multilayer structure is used to improve water and oxygen blocking capacity, then the water/oxygen blocking capability is improved, but the adhesion strength between layers is insufficient causing film separation during peeling-off
Solution Approach 1:
The inorganic separation layer is patterned into discrete inorganic separation units with gaps between them, rather than forming a continuous layer. This segmentation allows the organic layers to contact each other at the gap regions, creating strong adhesion points that prevent film separation during peeling-off while maintaining the water/oxygen blocking function through the inorganic units.
Solution Approach 2:
The inorganic separation layer exhibits spatially varying properties: in the gap regions, the organic layers are in direct contact providing strong adhesion, while in the inorganic separation unit regions, the layer provides water/oxygen blocking. This local differentiation of structure and function resolves the contradiction between adhesion strength and blocking capability.
2Ease of manufacture
If a conventional single layer organic polymer substrate is used, then the manufacturing process is simple, but the water and oxygen blocking capacity is insufficient
Solution Approach 1:
The flexible substrate employs a composite multilayer structure combining organic polymer layers with inorganic separation units. This composite architecture leverages the flexibility and processability of organic materials while incorporating the superior water/oxygen blocking properties of inorganic materials, thereby achieving enhanced protection without significantly complicating the manufacturing process.
3Reliability
If the inorganic layer is formed as a continuous layer, then the water/oxygen blocking is enhanced, but the adhesion between organic layers is reduced causing film peeling
Solution Approach 1:
The continuous inorganic layer is segmented into discrete inorganic separation units with gaps between them. This segmentation strategy allows the organic layers to establish direct contact and strong adhesion at the gap regions, while the inorganic units maintain their water/oxygen blocking function, thus resolving the contradiction between blocking enhancement and adhesion maintenance.
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 enhances the flexibility and water/oxygen blocking efficiency of the flexible display substrate, reducing the risk of film damage during peeling and maintaining structural integrity, while simplifying the manufacturing process.
Implementation Method 1
starting the electrostatic spinning device, spraying an electrostatic spinning solution through the nozzle onto the carrier substrate positioned below
Implementation Method 2
depositing an inorganic film layer on the first organic layer, and the polymer fiber layer
Data Source
AI summary
The invention provides a flexible display substrate and manufacturing method thereof. The manufacturing method for flexible display substrate patternizes the inorganic layer between the two organic layers on the flexible substrate so that the two organic layer contacting each other at the gaps on the inorganic separation layer, so as to avoid the potential damage on the films during the subsequent laser-lift-off process. The method is simple and the manufacturing process is efficient. The flexible display substrate of the present invention uses a structure of stacked four thin film layers to realize effective water/oxygen blocking, thus avoiding display devices' eroding. The inner two organic layers of the flexible substrate contact each other directly at the gaps of the inorganic separation layer, and the high adhesion strength between the upper and lower film layers of the flexible substrate helps avoiding film-peeling inner the stacked structure.