Flexible Display Substrate Separation Using Charge Adhesive Layers
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Solution Overview
Problem
Existing methods for manufacturing flexible organic light-emitting display panels face issues with non-uniform separation of substrates and thermal deterioration, leading to degraded transmittance.
Innovation Solution
A method involving the use of charge adhesive layers with specific materials like graphene oxide and montmorillonite to facilitate easy separation of substrates without laser irradiation, using plasma-sprayed patterns to define cutting lines, and applying polymer materials to form flexible substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If laser is used to separate the flexible substrate from the substrate, then separation can be achieved, but the separation is non-uniform and thermal deterioration occurs degrading transmittance
Solution Approach 1:
A charge adhesive layer with specific charge properties is introduced as an intermediary between the flexible substrate and the substrate. This layer enables controlled separation through electrostatic forces without requiring laser irradiation, thereby avoiding thermal deterioration while achieving uniform separation.
Solution Approach 2:
The patent replaces the thermal-mechanical laser separation method with an electrostatic separation mechanism. By using charge adhesive layers with opposite charges, the separation process becomes non-thermal and controlled, eliminating thermal deterioration and improving separation uniformity.
2Ease of manufacture
If the flexible substrate is easily separated from the substrate, then transmittance is maintained, but the substrate and flexible substrate may separate too easily during the formation process
Solution Approach 1:
The charge adhesive layer's electrostatic properties are optimized to provide appropriate bonding strength during the formation process. The specific charge characteristics enable the substrate and flexible substrate to remain bonded during manufacturing while allowing for easy separation afterward, balancing stability and ease of separation.
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
Enables high transmittance and efficient separation of substrates, preventing thermal damage and ensuring the production of transparent flexible display apparatus.
Implementation Method 1
forming a first charge adhesive layer having a first charge on the substrate; forming a second charge adhesive layer having a second charge, which is opposite to the first charge, on the first charge adhesive layer
Implementation Method 2
forming a first charge adhesive pattern and a second charge adhesive pattern by removing an edge of each of the first charge adhesive layer and the second charge adhesive layer; the forming of the first charge adhesive pattern and the second charge adhesive pattern may remove a portion of each of the first charge adhesive layer and the second charge adhesive layer by spraying a gas in a plasma state
Data Source
AI summary
A method of manufacturing a flexible display apparatus includes: preparing a substrate; forming a first charge adhesive layer having a first charge on the substrate; forming a second charge adhesive layer having a second charge, which is opposite to the first charge, on the first charge adhesive layer; forming a first charge adhesive pattern and a second charge adhesive pattern by removing an edge of each of the first charge adhesive layer and the second charge adhesive layer; forming a flexible substrate on the substrate on which the first charge adhesive pattern and the second charge adhesive pattern are formed; forming a display unit on the flexible substrate; cutting the substrate, the first charge adhesive pattern, the second charge adhesive pattern, the flexible substrate, and the display unit along a cutting line; and separating the substrate and the flexible substrate.