Molded SiP Sidewall Interconnects for Compact Flex Routing
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Solution Overview
Problem
The challenge in the electronics industry is to integrate more performance and features into smaller spaces, particularly in portable devices, where traditional rigid printed circuit boards are insufficient due to space constraints, and flexible printed circuit boards offer a solution but require innovative methods for efficient interconnects and assembly.
Innovation Solution
The use of flexible module routing substrates with system-in-package (SiP) components, lateral and vertical interconnects encapsulated in molding compounds, and socket connector housings allows for right-angle sidewall interconnections, efficient space utilization, and reduced routing complexity, enabling miniaturization without redesigning existing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional rigid printed circuit boards are used, then structural stability is maintained, but space constraints in portable devices cannot be met
Solution Approach 1:
The patent employs flexible printed circuit boards (FPCBs) instead of rigid PCBs, allowing the circuit substrate to be bent and folded to fit into constrained three-dimensional spaces while maintaining electrical connectivity. The flexible substrate enables the device to achieve compact form factors without sacrificing structural integrity, directly resolving the contradiction between reducing device volume and maintaining stability.
2Volume of moving object
If flexible printed circuit boards are used to meet space constraints, then device compactness is achieved, but interconnection complexity increases
Solution Approach 1:
The patent utilizes right-angle sidewall interconnections that extend interconnects in the lateral dimension rather than requiring complex routing on the circuit board plane. By exposing interconnects on the side surface of the molding compound and making right-angle connections, the design simplifies the interconnection architecture while maintaining compact form factor, effectively reducing interconnection complexity.
Solution Approach 2:
The patent divides the interconnection function into separate components: lateral interconnects embedded in the molding compound, right-angle bends, and connection to FPCB landing pads. This segmentation allows each component to be optimized independently and simplifies the overall assembly process, reducing interconnection complexity while maintaining compactness.
3Adaptability or versatility
If more systems are integrated into smaller spaces, then device functionality is enhanced, but heat dissipation becomes more difficult
Solution Approach 1:
The patent exposes lateral interconnects on the side surface of the molding compound, creating additional surface area for heat dissipation. By utilizing the three-dimensional space and exposing interconnects laterally rather than only on top surfaces, the design increases the effective heat dissipation area, enabling better thermal management while integrating more systems into compact spaces.
Data Source
AI summary
Electronic modules and methods of fabrication are described. In an embodiment, an electronic module includes a molded system-in-package, and a flexible circuit mounted on a side surface of a molding compound layer such that the flexible circuit is in electrical contact with a lateral interconnect exposed along the side surface of the molding compound layer.