LED Carrier Plate Structure for Accurate Chip Mass Transfer
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Solution Overview
Problem
The production process of light-emitting-diode (LED) base plates faces issues with position deviation and reduced yield due to gas formation in the dissociable-adhesive layer, leading to inaccuracies in the transfer of LED chips.
Innovation Solution
A carrier plate with a dissociation regulating feature, such as arc-shaped protrusions or gratings, is introduced to regulate the dissociation accuracy of the adhesive layer, ensuring uniform energy distribution and gas exhaustion, thereby preventing position deviations during the transfer process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the dissociable-adhesive layer is used to transfer light-emitting-diode chips, then the mass transfer can be realized, but gas is generated inside the adhesive layer causing position deviation of the chips
Solution Approach 1:
The dissociable-adhesive layer is segmented into multiple independent microcavities, each containing a light-emitting-diode chip. This segmentation prevents gas from spreading across the entire adhesive layer, confining it to localized areas and minimizing position deviation during chip transfer.
Solution Approach 2:
A gas exhaust structure is introduced as an intermediary component between the dissociable-adhesive layer and the external environment. This structure provides a controlled pathway for gas to escape during the dissociation process, preventing gas accumulation that would cause chip position deviation while maintaining the integrity of the mass transfer system.
2Productivity
If the dissociable-adhesive layer is excited to dissociate, then the light-emitting-diode chips can be transferred, but the dissociation accuracy is reduced due to gas formation
Solution Approach 1:
The adhesive layer is divided into discrete microcavities, each acting as an independent dissociation unit. This segmentation enables precise control over the dissociation process at each chip location, improving dissociation accuracy while maintaining high transfer efficiency across the entire array.
Solution Approach 2:
The gas exhaust structure serves as a mediator that facilitates controlled gas removal during dissociation. By providing dedicated exhaust pathways for each microcavity, the system achieves accurate dissociation timing and positioning without the adverse effects of uncontrolled gas formation.
3Ease of manufacture
If gas is generated inside the dissociable-adhesive layer, then the dissociation process occurs, but position deviation of chips occurs reducing yield
Solution Approach 1:
The gas generated during dissociation, which initially causes position deviation, is converted into a beneficial element by channeling it through controlled exhaust pathways. The gas pressure is utilized to facilitate chip release while the exhaust structure ensures it escapes in a controlled manner, preventing yield reduction.
Solution Approach 2:
The gas exhaust structure acts as an intermediary that mediates between the gas generation process and the chip transfer outcome. It provides a controlled interface for gas removal, ensuring that the dissociation process proceeds reliably without compromising chip position or reducing transfer yield.
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 solution enhances the yield and accuracy of LED chip transfer by preventing gas-induced deviations, improving the efficiency and reliability of the mass transfer process.
Implementation Method 1
After the dissociable-adhesive layer in the carrier plate is excited, and before the dissociable-adhesive layer is entirely dissociated, gas is firstly generated inside the dissociable-adhesive layer to form a microcavity
Data Source
AI summary
The embodiments of the present application provide a carrier plate and a transferring device. The carrier plate particularly includes a transporting base plate, a dissociation regulating feature and a dissociable-adhesive layer that are sequentially arranged, the dissociation regulating feature is configured to regulate a dissociation accuracy of the dissociable-adhesive layer, and the dissociable-adhesive layer is configured to be connected to a plurality of light-emitting-diode chips. The carrier plate can increase the yield and the dissociation accuracy of the light-emitting-diode chips, which can increase the yield in the process of the mass transfer and the efficiency of the mass transfer of the light-emitting-diode chips.


