MATEC Web Conf.
Volume 108, 20172017 International Conference on Mechanical, Aeronautical and Automotive Engineering (ICMAA 2017)
|Number of page(s)||5|
|Section||Functional Materials and Performance Testing|
|Published online||31 May 2017|
Cracking behavior of thin gold strip deposited on polycarbonate plate under Cyclic and stepwisely-increased tension
1 Okayama University, Graduate School of Natural Science and Technology, Okayama, Japan
2 Qingdao University of Science and Technology, College of Mechanical and Electronical Engineering, Qingdao, Shandong, P.R. China
Thin metal films deposited on polymers have been attracting much attention in flexible electronics. Various combinations of film and polymer substrate are expected to be developed. In this paper, deformation and fracture of thin metal film on polymer substrate was briefly analysed and the influencing factors were summarized. After that, focusing on the shape and thickness of thin metal film on polymer substrate, cracking behavior of small rounded-rectangular thin gold films called “strips” with a thickness less than one micrometer was observed under cyclic and stepwisely-increased trapezoidal tensions. The strips were deposited on a polycarbonate plate specimen, and wide and narrow strips with different thickness were prepared for the tests. The cracking behaviour was successfully observed and the increasing rate of crack number with the load or strain was examined. Since most cracks were initiated from the small defects, the crack initiation behavior was correlated with the distribution of defects.
© The Authors, published by EDP Sciences, 2017
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