Using Blech's structure, we studied the electromigration (EM) behaviors of four different Sn(Cu) and Sn(Ni) alloys, which are Sri, Sn0.7Cu, Sn3.0Cu, and Sn1Ni. The order of the EM rates was determined to be Sn0.7Cu > Sn > Sn3Cu > Sn1Ni. We believe that th