Light-Emitting Element Panel for Laser-Guided Transfer Alignment
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Solution Overview
Problem
The manufacturing process of light-emitting diode display panels faces challenges with incomplete etching of adhesive patterns, leading to potential offset and rotation of light-emitting diode elements during transfer, and over-etching risks damaging the elements.
Innovation Solution
A light-emitting element panel design incorporating a temporary storage substrate with an auxiliary pattern layer and adhesive patterns, where the auxiliary pattern layer has openings and a lower reaction rate to laser, allowing precise separation and transfer of light-emitting elements without damaging them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the adhesive layer is etched to completely separate the adhesive patterns, then the light-emitting diode elements can be transferred without offset or rotation, but the light-emitting diode elements may be easily damaged
Solution Approach 1:
The adhesive layer is divided into multiple separate adhesive patterns through etching, with each pattern corresponding to a light-emitting diode element. The segmentation creates isolated bonding regions that prevent offset and rotation during transfer while controlling the etching depth to avoid element damage
Solution Approach 2:
The etching process is applied selectively to create adhesive patterns with specific local properties - the etched regions provide separation and alignment features while unetched regions maintain structural integrity. The adhesive patterns have different properties in different zones to achieve both precision and protection
2Reliability
If the adhesive layer is not etched completely, then the light-emitting diode elements remain protected, but the adhesive patterns are still partially connected causing offset and rotation during transfer
Solution Approach 1:
The adhesive layer is pre-etched to form distinct adhesive patterns before the transfer process. This preliminary action creates predefined separation zones that guide the light-emitting diode elements into correct positions, preventing offset and rotation during subsequent handling and transfer operations
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 design improves transfer yield by preventing offset and rotation of light-emitting elements and reduces the risk of damage during the transfer process, ensuring smooth bonding to the driving backplane.
Implementation Method 1
A reaction rate of the auxiliary pattern layer to a laser is lower than a reaction rate of the adhesive pattern to the laser
Data Source
AI summary
A light-emitting element panel, including a temporary storage substrate, an auxiliary pattern layer, multiple adhesive patterns, and multiple light-emitting elements, is provided. The auxiliary pattern layer is disposed on the temporary storage substrate and has multiple openings. The adhesive patterns are respectively disposed in the openings of the auxiliary pattern layer. The light-emitting elements are respectively disposed on the adhesive patterns. A reaction rate of the auxiliary pattern layer to a laser is lower than a reaction rate of the adhesive pattern to the laser. Moreover, another light-emitting element panel is also provided.