Laser Release Layer Assembly for Precise Parallel Component Transfer
Find Innovative SolutionsGenerate Solutions
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 of the release layer, allowing for concurrent release and precise placement of multiple discrete components onto a target substrate, with the option for single-component or multiple-component modes based on quality criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional assembly methods are used to transfer discrete components onto substrates, then the process is simpler to implement, but the throughput is low and placement precision is insufficient
Solution Approach 1:
The patent segments the assembly process into distinct phases: adhesion phase where components are attached to the dynamic release layer, and release phase where laser irradiation selectively detaches components. This segmentation enables high-throughput parallel processing while maintaining controlled complexity through standardized process modules.
Solution Approach 2:
The patent utilizes parameter changes in the dynamic release layer's adhesion properties through laser irradiation. The laser energy selectively modifies the adhesion parameters of the release layer at specific locations, enabling precise component release control. This parameter modulation allows high-speed assembly without requiring complex mechanical positioning systems.
2Productivity
If multiple discrete components are assembled simultaneously to increase throughput, then productivity improves, but the precision of component placement deteriorates
Solution Approach 1:
The patent applies local quality by creating spatially varying adhesion characteristics in the dynamic release layer. Each region of the release layer has tailored adhesion properties matched to the specific component requirements at that location. The laser irradiation pattern is also locally optimized, with energy distribution customized for each component's size, shape, and material properties, enabling precise placement even during parallel assembly of multiple components.
3Adaptability or versatility
If a dynamic release layer is used to enable component release, then assembly flexibility improves, but the process complexity increases due to additional materials and steps
Solution Approach 1:
The dynamic release layer serves multiple functions: it provides initial component adhesion during transfer, enables selective release through laser irradiation, and allows for both parallel and sequential assembly modes. This multi-functionality reduces the need for separate adhesion and release mechanisms, actually simplifying the overall process despite the added material layer.
Solution Approach 2:
The patent replaces mechanical release mechanisms with optical field-based release using laser irradiation. Instead of complex mechanical actuators or chemical treatments for component release, the system uses non-contact laser energy to selectively modify the release layer's adhesion properties. This substitution reduces mechanical complexity while enhancing assembly flexibility and precision.
4Productivity
If laser energy is used to induce ablation of the release layer for component release, then release speed and precision improve, but energy consumption increases
Solution Approach 1:
The patent applies partial action by using laser irradiation that ablates only the thin dynamic release layer rather than the entire component structure. The laser energy is precisely controlled to remove just enough material (typically micrometers thick) to enable component release, avoiding excessive energy consumption. This selective partial ablation achieves fast release speeds while maintaining energy efficiency.
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 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.