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Micromachines 2018, 9(8), 382;

Stretchability—The Metric for Stretchable Electrical Interconnects

Department of Electronics and Information Systems, Ghent University, Technologiepark 15, 9052 Zwijnaarde, Belgium
IMEC vzw, Kapeldreef 75, 3001 Heverlee, Belgium
Authors to whom correspondence should be addressed.
Received: 2 July 2018 / Revised: 24 July 2018 / Accepted: 27 July 2018 / Published: 1 August 2018
(This article belongs to the Special Issue Flexible Electronics: Fabrication and Ubiquitous Integration)
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Stretchable circuit technology, as the name implies, allows an electronic circuit to adapt to its surroundings by elongating when an external force is applied. Based on this, early authors proposed a straightforward metric: stretchability—the percentage length increase the circuit can survive while remaining functional. However, when comparing technologies, this metric is often unreliable as it is heavily design dependent. This paper aims to demonstrate this shortcoming and proposes a series of alternate methods to evaluate the performance of a stretchable interconnect. These methods consider circuit volume, material usage, and the reliability of the technology. This analysis is then expanded to the direct current (DC) resistance measurement performed on these stretchable interconnects. A simple dead reckoning approach is demonstrated to estimate the magnitude of these measurement errors on the final measurement. View Full-Text
Keywords: stretchability; electronic measurements; stretchable circuits; design metrics; reliability stretchability; electronic measurements; stretchable circuits; design metrics; reliability

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Plovie, B.; Bossuyt, F.; Vanfleteren, J. Stretchability—The Metric for Stretchable Electrical Interconnects. Micromachines 2018, 9, 382.

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