Parallel LED Assembly via Laser-Induced Dynamic Release Layer
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Solution Overview
Problem
Current methods for assembling discrete components onto substrates are inefficient, particularly in achieving high throughput and precise placement of components like LEDs, due to limitations in adhesion release and component sorting.
Innovation Solution
A laser-assisted transfer process using a dynamic release layer, where laser energy is applied to induce ablation and deformation, allowing for concurrent release and precise placement of multiple discrete components onto a target substrate, enabling high-throughput assembly of LED arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional assembly methods are used to transfer discrete components onto substrates, then component placement can be achieved, but throughput is low and assembly efficiency is poor
Solution Approach 1:
The patent segments the assembly process by dividing components into groups that can be transferred simultaneously. Multiple components are arranged in arrays on the carrier substrate, allowing parallel transfer operations that dramatically increase throughput compared to sequential placement methods.
Solution Approach 2:
The patent merges multiple component transfer operations into a single concurrent process. By using array-based component arrangements and simultaneous release mechanisms, multiple components are transferred and placed onto the target substrate in one operation, maximizing assembly efficiency.
2Manufacturing precision
If conventional adhesion release methods are used, then component release can be achieved, but release precision and placement accuracy are insufficient
Solution Approach 1:
The patent replaces complex mechanical release mechanisms with a photoresponsive dynamic release layer that responds to light stimuli. This substitution simplifies the release mechanism while enabling precise, controlled component release through optical signals, thereby improving placement precision without increasing mechanical complexity.
Solution Approach 2:
The patent changes the adhesion parameters of the release layer dynamically through photoresponsive properties. The release layer transitions between high-adhesion and low-adhesion states based on light exposure, allowing precise control over component release timing and position without complex mechanical systems.
3Productivity
If individual component transfer is performed, then quality control can be maintained, but assembly speed and throughput are reduced
Solution Approach 1:
The patent performs preliminary quality control actions before the transfer process. Components are screened and sorted while still on the carrier substrate using optical or electrical testing, ensuring that only qualifying components are transferred. This preliminary filtering maintains quality control while enabling high-speed parallel transfer of verified components.
Solution Approach 2:
The system incorporates self-service quality control where the component array itself facilitates testing and sorting. The structured arrangement on the carrier substrate enables automated optical inspection and electrical testing of multiple components simultaneously, maintaining reliability while supporting high-speed assembly.
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 approach enables ultra-fast, high-throughput, and low-cost assembly of discrete components, such as LEDs, with precise placement and high yield, suitable for applications in displays and solid-state lighting.
Implementation Method 1
The irradiating induces an ablation of at least a portion of the dynamic release layer in each of the irradiated regions
Implementation Method 2
The ablation of the partial thickness of the dynamic release layer induces a deformation of a remaining thickness of the dynamic release layer in each of the irradiated regions
Data Source
AI summary
A method includes transferring multiple discrete components from a first substrate to a second substrate, including illuminating multiple regions on a top surface of a dynamic release layer, the dynamic release layer adhering the multiple discrete components to the first substrate, each of the irradiated regions being aligned with a corresponding one of the discrete components. The illuminating induces a plastic deformation in each of the irradiated regions of the dynamic release layer. The plastic deformation causes at least some of the discrete components to be concurrently released from the first substrate.