Mechanical response of spiral interconnect arrays for highly stretchable electronics

Nadeem Qaiser, S. M. Khan, Maha A. Nour, M. U. Rehman, J. P. Rojas, Muhammad Mustafa Hussain

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

A 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 the 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 shows that spiral arm elongation depends on the angular position of that particular spiral in the array. We also introduce the concept of a unit-cell, which fairly replicates the deformation mechanism for full complex hexagon, diamond, and 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 that experimental observations corroborate with theoretical study.
Original languageEnglish (US)
Pages (from-to)214102
JournalApplied Physics Letters
Volume111
Issue number21
DOIs
StatePublished - Nov 21 2017

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