Parallel Component Transfer Using Laser-Release Beamlets
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Solution Overview
Problem
Existing 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 method involving a dynamic release layer and laser-assisted transfer process, where laser energy is used to ablate the release layer, allowing for concurrent or sequential transfer of discrete components onto a target substrate with precise alignment and high yield, using diffractive optical elements to split the laser beam into multiple beamlets for targeted ablation.
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, but the throughput is low and placement precision is insufficient
Solution Approach 1:
The patent segments the laser beam into multiple beamlets using diffractive optical elements, allowing simultaneous processing of multiple discrete components in parallel. This segmentation enables high-throughput assembly by treating multiple components concurrently rather than sequentially, directly resolving the contradiction between throughput and process simplicity.
Solution Approach 2:
The patent replaces conventional mechanical transfer mechanisms with a laser-based ablation system. The laser beamlets ablate the release layer to release components, which are then transferred using acoustic waves or electrostatic forces rather than mechanical manipulation. This substitution enables precise placement while maintaining high throughput, addressing both productivity and precision requirements.
2Manufacturing precision
If laser energy is used to ablate the release layer for component transfer, then placement precision is improved, but the process complexity increases
Solution Approach 1:
The patent employs a single laser source that performs multiple functions: it segments into beamlets for parallel processing, provides precise positioning through optical focusing, and enables controlled ablation of the release layer. This multi-functionality reduces the need for separate systems for each operation, mitigating the complexity increase while maintaining high precision.
Solution Approach 2:
The patent introduces a dynamic release layer as an intermediary between the discrete components and the substrate. This layer mediates the transfer process by providing controlled adhesion that can be selectively removed by laser ablation. The intermediary simplifies the overall process by decoupling the precision placement requirement from the transfer mechanism, allowing independent optimization of each function.
3Speed
If multiple discrete components are transferred concurrently, then assembly speed is improved, but the control difficulty increases
Solution Approach 1:
The patent merges multiple laser beamlets into a single optical system that processes multiple components simultaneously. By combining the control of multiple beamlets through a unified optical path and timing mechanism, the system achieves parallel processing without proportionally increasing control complexity. This merging enables high-speed concurrent transfer while maintaining manageable system control.
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 large-scale applications like 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
separating the laser energy with a diffractive optical element
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.