Stretchability of thin metal films on elastomer substrates

by: Teng Li, Zhenyu Huang, Z Suo, Stephanie P Lacour, Sigurd Wagner

Applied Physics Letters, Vol. 85, No. 16. (2004), pp. 3435-3437.

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Abstract

Many flexible electronic surfaces comprise inorganic films on organic substrates. Mechanical failure of such integrated structures of stiff and compliant materials poses a significant challenge. This letter studies the stretchability of metal films on elastomer substrates. Our experiment shows that, when stretched, elastomer-supported metal films rupture at strains larger than those reported for freestanding films. We use a finite element code to simulate the rupture process of metal films. A freestanding metal film ruptures by forming a single neck. By contrast, a metal film on an elastomer substrate may develop an array of necks before rupture. While the pre-rupture necks do not change the electrical conductance appreciably, they elongate the metal film, leading to a large overall rupture strain. ©2004 American Institute of Physics

@article{citeulike:587273, abstract = {Many flexible electronic surfaces comprise inorganic films on organic substrates. Mechanical failure of such integrated structures of stiff and compliant materials poses a significant challenge. This letter studies the stretchability of metal films on elastomer substrates. Our experiment shows that, when stretched, elastomer-supported metal films rupture at strains larger than those reported for freestanding films. We use a finite element code to simulate the rupture process of metal films. A freestanding metal film ruptures by forming a single neck. By contrast, a metal film on an elastomer substrate may develop an array of necks before rupture. While the pre-rupture necks do not change the electrical conductance appreciably, they elongate the metal film, leading to a large overall rupture strain. \©2004 American Institute of Physics}, author = {Li, Teng and Huang, Zhenyu and Suo, Z. and Lacour, Stephanie P. and Wagner, Sigurd }, citeulike-article-id = {587273}, doi = {http://dx.doi.org/10.1063/1.1806275}, journal = {Applied Physics Letters}, keywords = {flexible-electronics, macroelectronics, stretchability, thin-metal-film}, number = {16}, pages = {3435--3437}, posted-at = {2006-04-15 05:10:55}, priority = {5}, publisher = {AIP}, title = {Stretchability of thin metal films on elastomer substrates}, url = {http://dx.doi.org/10.1063/1.1806275}, volume = {85}, year = {2004} }

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TY - JOUR ID - citeulike:587273 L3 - citeulike-article-id:587273 TI - Stretchability of thin metal films on elastomer substrates JF - Applied Physics Letters VL - 85 IS - 16 SP - 3435 EP - 3437 PB - AIP N2 - Many flexible electronic surfaces comprise inorganic films on organic substrates. Mechanical failure of such integrated structures of stiff and compliant materials poses a significant challenge. This letter studies the stretchability of metal films on elastomer substrates. Our experiment shows that, when stretched, elastomer-supported metal films rupture at strains larger than those reported for freestanding films. We use a finite element code to simulate the rupture process of metal films. A freestanding metal film ruptures by forming a single neck. By contrast, a metal film on an elastomer substrate may develop an array of necks before rupture. While the pre-rupture necks do not change the electrical conductance appreciably, they elongate the metal film, leading to a large overall rupture strain. ©2004 American Institute of Physics KW - flexible-electronics KW - macroelectronics KW - stretchability KW - thin-metal-film AU - Li, Teng AU - Huang, Zhenyu AU - Suo, Z AU - Lacour, Stephanie AU - Wagner, Sigurd PY - 2004/// UR - http://dx.doi.org/10.1063/1.1806275 ER -

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