A multiaxial stretchable interconnect using liquid-alloy-filled elastomeric microchannels

Authors

Kim Hyun-Joong
Son Chulwoo
B. Ziaie

Abstract

We report on the fabrication and characterizations of a multiaxial stretchable interconnect using room-temperature liquid-alloy-filled elastomeric microchannels. Polydimethylsiloxane (PDMS) microchannels coated at the bottom with a gold wetting layer were used as the reservoirs which were subsequently filled by room-temperature liquid alloy using microfluidic injection technique. Using a diamond-shaped geometry to provide biaxial performance, a maximum stretchability of 100% was achieved (R=0.24 ). Less than 0.02 resistance variation was measured for 180 bending. Active electronics, light emitting diode, was also integrated onto the PDMS substrate with stretchable interconnects to demonstrate stable electrical connection during stretching, bending, and twisting.

Comments

Publisher retains content copyright.

Keywords

elastomers, integrated circuit interconnections, Light emitting diodes, liquid alloys, polymer films, wetting

Date of this Version

January 2008

DOI

http://dx.doi.org/10.1063/1.2829595

Published in:

Applied Physics Letters 92,1 (2008) 011904-1;