A Biaxially Stretchable Interconnect with Liquid Alloy Joints on Flexible Substrate

Abstract

This paper reports a new and simple way to fabricate biaxially stretchable interconnects. To increase the stretchability, two novel ideas are suggested. These include 1) a geometry of 2-D diamond shaped gold lines on a PDMS substrate, and 2) coverage of potentially breakable points with liquid alloy. Stretchability of up to 60% was obtained using these techniques.