Electrical Performance of Fractal Web as Flexible Interconnects

Abstract

Spiderweb is one of the most mechanically robust and optimized naturally available structure, which can withstand multidirectional forces, in addition to the fact that the structure works even if one or more spiral lines are broken. Such a design can be worked with as an important model to develop conformal, lightweight, and stretchable electronic configuration like arrays of sensors environment for healthcare applications. Interconnects in flexible electronic circuit play a significant role on its performance and multiple types of geometries have its inspiration from biological world. In this work, fractal spiderweb based interconnect design is studied for mechanical strength and compared with similar dimensional other available intercommons using finite element method (FEM). A third order fractal web architecture is designed with gold layer integrated over polyimide. Prominent flexible interconnect geometries and their electrical performance is compared with that of fractal web architecture. The design is studied under axial load in two perpendicular directions and under shear load in six radial directions. Electrical parameters i.e., resistance and maximum electric field intensity of the simulated structure under loading conditions were observed when the fractal nodes are cut radially and spirally.