123697.fig.008
Figure 8: Schematic diagram of the growth mechanism of Cu6Sn5 at the Sn-Ag-Cu/Cu interface: (a) individual Cu6Sn5 grains at the interface, (b) Cu6Sn5 growth along the interface, (c) the ripening process resulted in scallop Cu6Sn5, and (d) coarsening of scallop Cu6Sn5.