Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/97085
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dc.contributor.authorKumar, Adityaen
dc.contributor.authorYang, Yingen
dc.contributor.authorWong, Chee C.en
dc.contributor.authorKripesh, Vaidhyanathanen
dc.contributor.authorChen, Zhongen
dc.date.accessioned2013-06-17T04:39:10Zen
dc.date.accessioned2019-12-06T19:38:50Z-
dc.date.available2013-06-17T04:39:10Zen
dc.date.available2019-12-06T19:38:50Z-
dc.date.copyright2008en
dc.date.issued2008en
dc.identifier.citationKumar, A., Yang, Y., Wong, C. C., Kripesh, V., & Chen, Z. (2009). Effect of Electromigration on the Mechanical Performance of Sn-3.5Ag Solder Joints with Ni and Ni-P Metallizations. Journal of Electronic Materials, 38(1), 78-87.en
dc.identifier.issn0361-5235en
dc.identifier.urihttps://hdl.handle.net/10356/97085-
dc.description.abstractThe effect of moderate electric current density (1 × 10^3 to 3 × 10^3 A/cm^2) on the mechanical properties of Ni-P/Sn-3.5Ag/Ni-P and Ni/Sn-3.5Ag/Ni solder joints was investigated using a microtensile test. Thermal aging was carried out at 160°C for 100 h while the current was passed. The interfacial microstructure and intermetallic compound (IMC) growth were analyzed. It was found that, at these levels of current density, there were no observable voids or hillocks. Samples aged at 160°C without current stressing failed mostly inside the bulk solder with significant prior plastic deformation. The passage of current was found to cause brittle failure of the solder joints and this tendency for brittle failure increased with increasing current density. Fractographic analysis showed that, in most of the electrically stressed samples, fracture occurred at the interface region between the solder and the joining metals. The critical current density that caused brittle fracture was about 2 × 10^3 A/cm^2. Once brittle fracture occurred, the tensile toughness, defined as the energy per unit fractured area, was usually lower than ~5 kJ/m^2, compared with the case of ductile fracture where this value was typically greater than ~9 kJ/m^2. When comparing the two types of joint, the brittle failure was found to be more severe with the Ni than with the Ni-P joint. This work also found that the passage of electric current affects the IMC growth rate more significantly in the Ni than in the Ni-P joint. In the case of the Ni joint, the Ni3Sn4 IMC at the anode side was appreciably thicker than that formed at the cathode side. However, in the case of electroless Ni-P metallization, this difference was much smaller.en
dc.language.isoenen
dc.relation.ispartofseriesJournal of electronic materialsen
dc.rights© 2008 TMS.en
dc.titleEffect of electromigration on the mechanical performance of Sn-3.5Ag solder joints with Ni and Ni-P metallizationsen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science & Engineeringen
dc.identifier.doi10.1007/s11664-008-0565-6en
item.fulltextNo Fulltext-
item.grantfulltextnone-
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