Effect of lamination on the bending fatigue life of copper coated PET substrate

Khalid Alzoubi; Mohammad M. Hamasha; Mark Schadt; Susan Lu; Bahgat Sammakia; Mark Poliks

doi:10.1117/12.874226

2 February 2011 Effect of lamination on the bending fatigue life of copper coated PET substrate

Khalid Alzoubi, Mohammad M. Hamasha, Mark Schadt, Susan Lu, Bahgat Sammakia, Mark Poliks

Proceedings Volume 7956, Advances in Display Technologies; and E-papers and Flexible Displays; 79560X (2011) https://doi.org/10.1117/12.874226
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

While today's display technology is mainly based on rigid-based substrate, flexible display technology has been significantly growing since the last decade. However, Flexible displays are susceptible to many types of stresses during processing and usage. Thin films on flexible substrate are sensitive to ambient conditions. Therefore devices are usually laminated with a protective layer. In this study high cyclic bending fatigue experiments were conducted on 2000 oA thick copper thin films sputter deposited on 127 μm polyethylene terephthalate (PET) substrate laminated with another 127 μm PET layer. High magnification images were used to observe crack initiation and propagation in the thin film layer. Initial results showed a great influence of laminate layer on stress reduction in the thin film. Furthermore, a lamination layer causes cracks to spread out on a larger area with fine cracks and therefore reduce the chance of the cracks to meet and grow.

Citation Download Citation

Khalid Alzoubi, Mohammad M. Hamasha, Mark Schadt, Susan Lu, Bahgat Sammakia, and Mark Poliks "Effect of lamination on the bending fatigue life of copper coated PET substrate", Proc. SPIE 7956, Advances in Display Technologies; and E-papers and Flexible Displays, 79560X (2 February 2011); https://doi.org/10.1117/12.874226

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