Edge Interconnect Microchip Assembly Alignment
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Solution Overview
Problem
Existing methods are inadequate for precision alignment and reliable formation of mechanical and electrical connections between microchips with solid edge-to-edge interconnects, particularly in advanced system-in-package designs using Quilt Packaging interconnect technology.
Innovation Solution
Specialized assembly tools and methods that utilize manipulators for precise alignment and solder reflow to connect microchips with edge interconnects, ensuring accurate positioning and secure electrical and mechanical connections, including the use of vacuum for holding microchips and applying protective materials for encapsulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing assembly methods are used, then general compatibility is maintained, but precision alignment capability deteriorates
Solution Approach 1:
The alignment process is divided into multiple stages: initial coarse alignment using alignment marks, followed by precision alignment using the specialized apparatus with adjustable stages and sensors. This segmentation allows each stage to optimize for its specific requirement without compromising overall compatibility.
Solution Approach 2:
Alignment marks serve as intermediary elements between the existing assembly infrastructure and the precision alignment requirement. These marks provide a reference framework that enables high-precision positioning while working within existing assembly methodologies and equipment constraints.
2Reliability
If existing connection methods are used, then process simplicity is maintained, but connection reliability deteriorates
Solution Approach 1:
The specialized assembly apparatus integrates multiple functions into a single system: positioning, alignment, connection formation, and verification. This multi-functionality achieves reliable edge-to-edge interconnect formation without requiring multiple separate complex tools, thus managing overall device complexity while improving connection reliability.
Solution Approach 2:
The apparatus controls critical parameters such as positioning accuracy, pressure application, and thermal conditions during connection formation. By precisely controlling these parameters, the system achieves reliable mechanical and electrical connections between edge interconnects while maintaining a manageable level of system complexity.
3Ease of operation
If conventional handling methods are used, then equipment simplicity is maintained, but handling capability deteriorates
Solution Approach 1:
The microchips are equipped with alignment marks that automatically guide the positioning and alignment process. This self-service approach enables the chips to assist in their own precise placement, improving handling capability while reducing the complexity of the tooling required to achieve accurate positioning.
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 precise and reliable assembly of microchips with solid edge-to-edge interconnects, forming stable electrical and mechanical connections, suitable for advanced system-in-package designs and accommodating microchips of varying geometries and thicknesses.
Implementation Method 1
Vacuum is used to hold multiple microchips in place while additional microchips of the same or varying geometries, sizes, and thicknesses are aligned into an interconnected array or quilt
Implementation Method 2
This specialized assembly tooling performs heating functions to reflow solder to establish electrical and mechanical interconnections between multiple microchips
Data Source
AI summary
A first microchip includes holes or sockets along or in a top face or surface of the first microchip and a second microchip includes nodules extending from a edge of the second microchip. The nodules of the second microchip are received in the holes or sockets along or in the top face or surface of the first microchip, whereupon the first and second microchips are positioned transverse or perpendicular to each other.