Moiré-Aligned Vacuum Pick-and-Place for Heterogeneous Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current semiconductor fabrication methods are not suited for heterogeneous integration of diverse functional elements such as electronics, optics, photonics, and energy storage devices, lacking the precision and efficiency required for nanometer-scale assembly.
Innovation Solution
A method involving moiré based metrology and vacuum based pick-and-place techniques for assembling components with sub-100 nm precision, using adhesive placement and direct bonding, and etching sacrificial layers to achieve precise alignment and attachment of elements on a product substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If semiconductor fabrication methods are used for heterogeneous integration, then standard semiconductor packaging technology can be utilized, but the methods are not suited for processing the sheer variety of incompatible fabrication steps on a single substrate
Solution Approach 1:
The invention divides the heterogeneous integration process into separate fabrication stages. Different functional elements are fabricated on their respective source wafers using their native fabrication processes, then transferred to a common substrate. This segmentation allows each element to be manufactured using its optimal process while achieving heterogeneous integration.
Solution Approach 2:
The invention introduces an intermediary transfer process using vacuum-based pick-and-place technology. This intermediary mechanism bridges the gap between incompatible fabrication processes by enabling the transfer of micrometer-sized components from diverse source wafers to a common substrate without requiring process compatibility.
2Manufacturing precision
If conventional pick-and-place techniques are used for micrometer sized components, then heterogeneous integration can be achieved, but nanometer-precise placement and arbitrary constituent distribution are not simultaneously attainable
Solution Approach 1:
The invention merges multiple pick-and-place operations into a single parallel processing step. By using a vacuum superstrate with multiple pickup locations, the system can simultaneously pick multiple components and place them with nanometer precision in one operation, achieving both high precision and high throughput.
Solution Approach 2:
The invention replaces conventional mechanical pick-and-place systems with a vacuum-based system. The vacuum superstrate uses pressure differentials rather than mechanical contact to pick and place components, enabling simultaneous manipulation of multiple micrometer-sized elements with sub-100 nm placement precision.
3Measurement precision
If high precision alignment is achieved using moiré based metrology, then sub-100 nm placement precision is attained, but the complexity of the alignment system increases
Solution Approach 1:
The invention uses moiré based metrology that creates interference patterns by overlaying periodic structures. This optical copying approach allows sub-100 nm alignment precision to be achieved through pattern recognition and interference measurement rather than direct mechanical measurement, simplifying the overall system while maintaining 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
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 with sub-100 nm placement precision
Implementation Method 3
moiré based metrology and vacuum based pick-and-place
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.