Measurement and prediction of contact angles of Pb-free Sn-Ag solder alloys on Cu substrate A. M. Erer, E. Candan, M. H. Güven and Y. Turen Eur. Phys. J. Appl. Phys., 54 1 (2011) 11302 Published online: 13 April 2011 DOI: 10.1051/epjap/2011100487