Characterization of Zinc Oxide (ZnO) piezoelectric properties for Surface Acoustic Wave (SAW) device Mohd Rosydi Zakaria, Shazlina Johari, Mohd Hafiz Ismail and Uda Hashim EPJ Web Conf., 162 (2017) 01055 Published online: 22 November 2017 DOI: 10.1051/epjconf/201716201055