Transfer Printing Apparatus Laser Alignment Micro-LED
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Solution Overview
Problem
Current transfer printing technologies for micro/nano devices face challenges in efficiently and accurately placing devices on target substrates, with existing methods being costly, prone to defects, or having low working efficiency, especially in industrial production.
Innovation Solution
A transfer printing method involving the transfer of devices from an original substrate to a transfer substrate, followed by site-designated laser irradiation based on position information comparison between the two substrates, using a spatial light modulation component in a laser printer to align and transfer devices accurately and rapidly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional transfer printing methods are used, then devices can be transferred from original substrate to target substrate, but the transfer process is costly and prone to defects
Solution Approach 1:
The patent uses a movable transfer substrate that can be dynamically positioned and adjusted during the transfer process. The transfer substrate is designed to move between the original substrate and target substrate, enabling flexible control over the transfer operation. This dynamic approach replaces static conventional methods, improving both accuracy and cost-effectiveness by allowing precise positioning without expensive fixed equipment
Solution Approach 2:
The patent replaces complex mechanical alignment and transfer mechanisms with a simplified system based on position information comparison and laser irradiation. Instead of using elaborate mechanical positioning systems that are costly and complex, the invention uses digital position data from detection devices to guide a laser printer, substituting mechanical complexity with optical precision
2Productivity
If conventional transfer printing methods are used, then devices can be transferred, but the working efficiency is low
Solution Approach 1:
The patent performs preliminary detection and position information acquisition before the actual transfer operation. The detection device scans and records the positions of devices on the original substrate in advance, creating a digital map that guides the subsequent transfer process. This preliminary action eliminates the need for time-consuming real-time alignment during transfer, significantly improving efficiency
Solution Approach 2:
The patent replaces slow mechanical scanning and alignment procedures with rapid laser-based detection and digital position comparison. The laser printer can quickly irradiate devices at precise locations based on pre-acquired position information, eliminating the need for slow mechanical positioning and dramatically increasing transfer speed
3Manufacturing precision
If position alignment is performed between transfer substrate and target substrate, then accurate device placement is achieved, but the process becomes complex
Solution Approach 1:
The patent introduces position information as an intermediary between the transfer substrate and target substrate. Instead of directly aligning the substrates through complex mechanical procedures, the system uses detected position data as a mediator to guide the laser printer. This intermediary approach simplifies the alignment process by converting physical alignment into digital coordinate matching
Solution Approach 2:
The patent replaces complex mechanical alignment systems with a digital position comparison system. The laser printer uses position information from the detection device to calculate precise irradiation locations, substituting elaborate mechanical alignment mechanisms with optical positioning based on digital data processing
4Productivity
If site-designated laser irradiation is performed simultaneously on multiple devices, then transfer speed is improved, but positioning accuracy must be precisely controlled
Solution Approach 1:
The patent uses a laser printer with spatial light modulation capability to simultaneously irradiate multiple devices at precisely controlled locations. The laser system replaces mechanical positioning with optical focusing, where the position of each irradiation point is determined by digital coordinate calculation from the detected position information, enabling both high speed and high precision
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 method enables rapid and accurate placement of micro/nano devices on target substrates, reducing manufacturing costs and accelerating the industrialization of Micro-LED display panels by improving transfer efficiency and precision.
Implementation Method 1
performing a site-designated laser irradiation on at least part of devices on the transfer substrate corresponding to the first transfer position
Implementation Method 2
a spatial light modulation component configured to modulate the laser printer
Data Source
AI summary
A transfer printing method and a transfer printing apparatus. The transfer method includes: transferring a plurality of devices formed on an original substrate to a transfer substrate; obtaining first position information of positions of the plurality of devices on the transfer substrate; obtaining second position information of corresponding positions, on a target substrate, of devices to be transferred; comparing the first position information with the second position information to obtain first target position information recording a first transfer position; and aligning the transfer substrate with the target substrate and performing a site-designated laser irradiation on at least part of devices on the transfer substrate corresponding to the first transfer position, simultaneously, according to the first target position information, so as to transfer the at least part of the devices from the transfer substrate to the target substrate.