Moiré-Aligned Vacuum Superstrate Assembly for Compact Heterogeneous Devices
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Solution Overview
Problem
Current semiconductor fabrication methods are not suited for heterogeneous integration of diverse functional elements like electronics, optics, photonics, and energy storage devices, lacking the precision and efficiency needed for nanometer-scale assembly.
Innovation Solution
A method using moiré based metrology and vacuum based pick-and-place for assembling components with sub-100 nm precision, involving selective picking, placement, and secure attachment of elements onto a product substrate using a vacuum superstrate and liquid adhesive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If semiconductor fabrication methods are used for heterogeneous integration, then standard packaging technology can be utilized, but the variety of incompatible fabrication steps cannot be processed on a single substrate
Solution Approach 1:
The patent divides the heterogeneous integration process into separate fabrication stages for different functional elements, then uses pick-and-place technology to assemble these pre-fabricated components onto a final substrate. This segmentation allows each element to be manufactured using its optimal fabrication process while achieving integrated functionality.
2Manufacturing precision
If conventional pick-and-place is used for heterogeneous integration, then disparate components can be assembled, but nanometer-precise placement cannot be achieved
Solution Approach 1:
The patent replaces conventional mechanical pick-and-place systems with a vacuum-based assembly system. The vacuum superstrate enables simultaneous pickup of multiple components with sub-100 nm precision through controlled atmospheric pressure differential, eliminating mechanical contact and achieving both high precision and parallel processing capability.
Solution Approach 2:
The patent changes the operating parameters of the assembly system by using vacuum pressure control instead of mechanical force. By adjusting vacuum level and superstrate positioning, the system achieves nanometer-scale placement precision while maintaining high throughput through parallel component assembly.
3Manufacturing precision
If high precision placement is achieved, then sub-100 nm alignment accuracy is obtained, but the complexity of the assembly system increases
Solution Approach 1:
The patent introduces a vacuum superstrate as an intermediary between the components and the assembly substrate. This superstrate serves as a mediator that simultaneously holds multiple components, enables precise positioning through vacuum control, and simplifies the overall system by replacing complex mechanical positioning mechanisms with pressure differential 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 highly parallel and nanometer-precise assembly of components, achieving sub-10 nm alignment accuracy and efficient integration of disparate functional elements on a semiconductor substrate.
Implementation Method 1
selectively picking one or more elements from a source wafer by a vacuum superstrate attached to the one or more elements
Implementation Method 2
placing the selectively picked one or more elements onto an adhesive on the product substrate
Data Source
AI summary
A method for assembling heterogeneous components. The assembly process includes using a vacuum based pickup mechanism in conjunction with sub-nm precise moiré alignment techniques resulting in highly accurate, parallel assembly of feedstocks.