Chiplet Loader Using Field Generators for Precise Microassembly
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Solution Overview
Problem
Existing technologies face challenges in efficiently assembling and positioning large numbers of micro-objects, such as chiplets, in precise patterns and orientations for mass production of devices like microLED displays and van der Waals materials.
Innovation Solution
A chiplet loader system that includes a reservoir for suspending chiplets in a fluid, a delivery surface for transporting chiplets to an assembly surface, and a micro assembler with field generators to arrange and orient chiplets in a pattern, ensuring they are moved to a subsequent assembly stage in the correct orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual assembly methods are used for micro-objects, then positioning precision can be achieved, but productivity is severely limited
Solution Approach 1:
The patent replaces manual mechanical manipulation with an automated system using suspension fluid, delivery surfaces, and field generators to transport and position chiplets. This substitution enables high-throughput automated assembly while maintaining precise positioning through controlled fluid dynamics and field-based manipulation, resolving the contradiction between productivity and positioning precision.
Solution Approach 2:
The patent introduces suspension fluid as an intermediary medium to transport chiplets from the reservoir to the assembly surface. The fluid acts as a carrier that enables automated handling of multiple micro-objects simultaneously, dramatically increasing productivity while the controlled release mechanism ensures precise positioning at the assembly surface.
2Productivity
If automated assembly systems are implemented, then productivity increases, but device complexity increases
Solution Approach 1:
The patent creates a multi-functional integrated system where the reservoir serves as both storage and suspension medium, the delivery surface functions as both transport path and release mechanism, and field generators provide both manipulation and positioning capabilities. This consolidation of multiple functions into unified components increases productivity while managing overall system complexity.
3Productivity
If chiplets are transported in bulk, then productivity improves, but orientation control becomes difficult
Solution Approach 1:
The patent applies different properties to different regions of the system: the suspension fluid provides bulk transport capability for high productivity, while the delivery surface features localized release zones with specific field generator configurations that ensure correct orientation. This local differentiation allows bulk handling efficiency while maintaining precise orientation control at the point of deposition.
Solution Approach 2:
The system performs preliminary orientation alignment of chiplets while they are being transported through the suspension fluid and on the delivery surface, before final release at the assembly surface. Field generators are activated in advance to orient chiplets correctly during transport, ensuring that when bulk transport occurs, orientation control is already established, resolving the contradiction between transport efficiency and orientation 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
The system enables the efficient and precise arrangement and transfer of large numbers of micro-objects, ensuring high position registration and orientation, which is critical for mass-producing complex devices like microLED displays.
Implementation Method 1
The micro assembler has an array of field generators fixed relative to the assembly surface that move the first subset of the chiplets along the assembly surface in response to signals applied to each of the field generators
Implementation Method 2
a reservoir that stores a supply of chiplets suspended in a suspension fluid
Data Source
AI summary
A micro-assembly system includes a reservoir that stores a supply of chiplets suspended in a suspension fluid. Each of the chiplets has a bottom major surface that defines a right side down orientation. The system includes a delivery surface or belt that delivers the chiplets from the reservoir to an assembly surface. The system includes a micro assembler that may arrange the first subset of the chiplets in a pattern on the assembly surface. The micro assembler moves the first subset of chiplets towards a subsequent assembly stage. The micro assembler has an array of field generators fixed relative to the assembly surface that move the first subset of the chiplets along the assembly surface in response to signals applied to each of the field generators.