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Inorganic islands on a highly stretchable polyimide substrate

Published online by Cambridge University Press:  31 January 2011

Jeong-Yun Sun
Affiliation:
Department of Material Science and Engineering, Seoul National University, Seoul 151-742, South Korea; and School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138
Nanshu Lu
Affiliation:
School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138
Juil Yoon
Affiliation:
Department of Mechanical Systems Engineering, Hansung University, Seoul 136-792, South Korea
Kyu-Hwan Oh
Affiliation:
Department of Material Science and Engineering, Seoul National University, Seoul 151-742, South Korea
Zhigang Suo
Affiliation:
Department of Material Science and Engineering, Seoul National University, Seoul 151-742, South Korea; and School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138
Joost J. Vlassak*
Affiliation:
School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138
*
a) Address all correspondence to this author. email: vlassak@esag.deas.harvard.edu
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Abstract

For a flexible electronic device integrating inorganic materials on a polymer substrate, the polymer can deform substantially, but the inorganic materials usually fracture at small strains. This paper describes an approach to make such a device highly stretchable. A polyimide substrate is first coated with a thin layer of an elastomer, on top of which SiNx islands are fabricated. When the substrate is stretched to a large strain, the SiNx islands remain intact. Calculations confirm that the elastomer reduces the strain in the SiNx islands by orders of magnitude.

Type
Articles
Copyright
Copyright © Materials Research Society 2009

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