|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Recent Developments in Biological, Structural and Functional Thin Films and Coatings
||Super-stretchable Metallic Interconnect Films with a Linear Strain of up to 100%
||Yeasir Arafat, Indranath Dutta, Rahul Panat
|On-Site Speaker (Planned)
Flexible metallic interconnects are highly important in wearable devices used in emerging areas such as soft robotics, human health monitoring, and sportsware. Metal interconnects in such devices are heterogeneous metal-polymer systems that sustain large deformation in the form of stretching and/or bending without failure. In this work, we present a material system and the mechanics of highly stretchable metallic interconnects. The material system consisted of Indium metal film over an elastomer (PDMS) with a discontinuous Cr adhesion layer such that the metal interconnect is shown to stretch to extremely high linear strain (up to 100%) without failure during repeated cycling. We also investigate the mechanisms that allow such films to be stretched by mapping the strain field of the Cr adhesion interlayer and the In interconnect film. We show that the Cr interlayer morphology, consisting of islands separated by bi-axial cracks, accommodates the strain by widening of the Cr cracks.
||Planned: Supplemental Proceedings volume