Stretch Display Thermal Separation Peeling Yield
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Solution Overview
Problem
Current stretch display devices face low production yield due to degradation of flexible substrates and film layers during the peeling process from glass substrates, resulting in increased manufacturing costs and mechanical issues.
Innovation Solution
The introduction of a thermal separation material in the hollow portion between pixel regions, which prevents direct contact between the encapsulating film layer and the substrate, allowing for easier peeling by generating gas when heated, thus alleviating substrate and film layer degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the encapsulating film layer is in direct contact with the glass substrate, then the adhesion is strong, but the flexible substrate and film layers are easily degraded during peeling
Solution Approach 1:
The patent introduces a release film as an intermediary layer between the encapsulating film layer and the glass substrate. This release film has controlled adhesion properties that allow strong bonding during manufacturing but enable easy separation during peeling, thus preventing degradation of the flexible substrate and film layers while maintaining strong adhesion during the manufacturing process.
Solution Approach 2:
The patent changes the adhesion parameter of the encapsulating film layer by introducing the release film with different adhesion characteristics. The release film exhibits temperature-dependent or stress-dependent adhesion properties, allowing strong bonding at manufacturing temperatures and reduced adhesion during peeling, thereby resolving the contradiction between strong adhesion and prevention of damage.
2Ease of manufacture
If the glass substrate is peeled off directly, then the manufacturing process is simple, but the flexible substrate and film layers are degraded
Solution Approach 1:
The patent applies preliminary action by pre-coating the glass substrate with a release film before forming the encapsulating film layer. This preliminary layer is specifically designed to control the peeling process, ensuring that when separation occurs, the flexible substrate and film layers remain intact. The release film is pre-applied with specific adhesion characteristics that prevent direct contact between the encapsulating film and substrate, thus protecting film layer integrity while maintaining manufacturing simplicity.
3Ease of operation
If the encapsulating film layer is separated from the substrate, then the stretch display device can be obtained, but the hollow portion is difficult to separate and causes mechanical damage
Solution Approach 1:
The release film acts as a mediator that facilitates easy separation of the encapsulating film layer from the glass substrate. The release film has low adhesion to both the substrate and the encapsulating film layer, allowing the hollow portion to separate easily during peeling without causing mechanical damage to the flexible substrate or film layers.
Solution Approach 2:
The release film provides beforehand cushioning by absorbing the mechanical stress during the peeling process. The release film's specific adhesion properties cushion the transition from bonded to separated state, preventing sudden mechanical shocks that would damage the hollow portion and surrounding structures, thus enabling easy separation while maintaining mechanical strength.
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 method significantly improves the production yield of stretch display devices by preventing mechanical tension-induced damage during peeling, reducing manufacturing costs, and ensuring the encapsulating film layer's proper separation from the substrate.
Implementation Method 1
The thermal separation material is away from and increases in width from a surface of the substrate facing the hollow portion and is flush with a side of the film layer remote from the substrate facing the hollow portion. Following heating of the thermal separation material, a portion of the encapsulating film layer physically coupled to the thermal separation material, and the substrate are peeled off.
Data Source
AI summary
The present disclosure discloses a stretch display device and a preparation method. The method includes providing a substrate on which a flexible substrate is disposed, and a film layer constituting a thin film transistor disposed on a side of the flexible substrate away from the substrate, the film layer being away from the flexible substrate. One side defines a plurality of pixel regions; a hollow portion is formed between adjacent two of the pixel regions, the hollow portion penetrates through the film layer and the flexible substrate; and thermal separation is provided in the hollow portion via a gel; a light-emitting element is disposed in the pixel region, and an encapsulating film layer is disposed on a side of the light-emitting element and the thermal separation gel away from the flexible substrate; heating the thermal separation gel, and the flexible liner. The bottom and the substrate are peeled off. Therefore, when the substrate is peeled off by this method, the problem of breakage of the flexible substrate and the film layer constituting the thin film transistor can be alleviated, and the production yield of the stretch display device can be remarkably improved.