Nadeem has got the fastest paper in the group after one’s
arrival! This is a fantastic story where we have introduce for the first time
ever the concept of unit cell to design stretchable electronics. Very promising
morning in the group – congrats Nadeem
et al.!
Mechanical Response of Spiral Interconnect
Arrays for Highly Stretchable Electronics
N.
Qaiser1, S. M. Khan1, M. Nour1, M. U. Rehman2,
J. P. Rojas2, M. M. Hussain1,*
1 Integrated
Nanotechnology Lab and Integrated Disruptive Electronic Applications (IDEA)
Lab, Electrical Engineering, Computer Electrical and Mathematical Science and
Engineering Division, King Abdullah University of Science and Technology
(KAUST), Thuwal 23955, Saudi Arabia
2 Electrical Engineering,
King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
*E-mail: muhammadmustafa.hussain@kaust.edu.sa
and Phone: +966-2-808-4450
Abstract
Spiral interconnect array is a commonly used architecture for
stretchable electronics, which accommodates large deformations during
stretching. Here we show the effect of different geometrical morphologies on
the deformation behavior of spiral island network. We use numerical modeling to
calculate the stresses and strains in the spiral interconnects under the
prescribed displacement of 1000 µm. Our result show that spiral arm
elongation depends on the angular position of that particular spiral in the
array. We also introduce the concept of unit cell, which fairly replicates the
deformation mechanism for full complex hexagon, diamond, square shaped arrays.
The spiral interconnects which are axially connected between displaced and
fixed islands attain higher stretchability and thus experience the maximum
deformations. We perform tensile testing of 3D printed replica and find
experimental observations corroborate with theoretical study.