Honeycomb-Inspired Interconnects for Large-Area Flexible Circuits: Simulation and Modeling

Cutting-edge interconnect design is crucial for flex circuits to achieve optimal signal integrity and transmit signals efficiently among various devices, even under mechanical and electrical strain. In this study, we inspected the suitability of using honeycomb-inspired stretchable connectors in flex circuits, stretched in two orientations: zigzag and armchair under mechanical and electrical stress. The mechanical and electrical deformations were modeled analytically and the same has been confirmed using the finite element analysis (FEA). Out of the two orientations, the resistance and capacitance change in armchair orientation is lesser by 3.6 and 20 times, respectively, compared to zigzag orientation under a strain of 20%, suggesting stability for omnidirectional interconnects in stretchable systems. Honeycomb-shaped connectors present a promising solution for crafting flexible circuits in applications such as smart textiles, soft robotics, and healthcare monitoring systems on curved surfaces, demanding multidirectional stretch capabilities.