Design And Performance Of Metal Conductors For Stretchable Electronic Circuits

摘要

Purpose - The purpose of this paper is to present an update on the progress of the design and reliability of stretchable interconnections for electronic circuits.rnDesign/methodology/approach - Finite element modelling (FEM) is used to analyse the physical behaviour of stretchable interconnects underrndifferent loading conditions. The fatigue life of a copper interconnect embedded into a silicone matrix has been evaluated using the Coffin-Mansonrnrelation and FEM.rnFindings - The mechanical properties of the substrate and the design of the metal interconnection play an important role on the fatigue lifetime of circuit.rnIn the case of copper embedded into a PDMS Sylgard 186, more than 2,500 tensile cycles have been observed for a periodic deformation of 10 per cent.rnResearch limitations/implications - Reliability results are limited and need further work to create a more accurate empirical model to estimate thernlifetime of stretchable interconnections.rnOriginality/value - The combined use of FEM and experimental analysis enable a more reliable design of the stretchable metal interconnections. Thernproposed horseshoe design offers the benefit of reduced permanent damage during elongation.