Abstract:Interfacial interactions in a Ni-xFe-Sn-In eutectic solder (x = 30 at.%, 55 at.%) have been examined. Transmission and scanning electron microscopy (TEM/ SEM) were utilized to investigate the structure, composition, and morphology of the intermetallic compounds (IMCs). Upon reflow, Ni 3 Sn 4 and FeSn 2 phases appeared at the interface along with Cu 6 Sn 5 in the solder. Annealing experiments revealed the formation of a bilayer IMC that was Fe-rich adjacent to the Ni-Fe metallization and Ni-rich on the solder s… Show more
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