TY - GEN
T1 - Electromigration studies on Sn(Cu) alloy lines
AU - Lu, C. C.
AU - Wang, S. J.
AU - Liu, C. Y.
PY - 2005
Y1 - 2005
N2 - Cu alloying effect in Sn(Cu) solder line has been studied. We found that the Sn0.7Cu solder line has the most serious EM damage than pure Sn and Sn3.0Cu solder lines. The dominant factor for the fast EM rate in Sn0.7Cu could be attributed to the relatively small grain size and the low critical stress, i.e., the yielding stress of Sn0.7Cu solder line. Also, we found that the shortest Sn0.7Cu solder line, 250 μm, has most serious EM damage among three solder lines of different lengths. The back-stress induced by EM might not play a significant role on the EM test of long solder lines. A new failure mode of EM test, i.e., EM under an external tensile, was observed. The external stress would be superimposed on the stress profile induced by EM. As a result, the hillock formation at the anode side was retarded and void formation at the cathode was enhanced.
AB - Cu alloying effect in Sn(Cu) solder line has been studied. We found that the Sn0.7Cu solder line has the most serious EM damage than pure Sn and Sn3.0Cu solder lines. The dominant factor for the fast EM rate in Sn0.7Cu could be attributed to the relatively small grain size and the low critical stress, i.e., the yielding stress of Sn0.7Cu solder line. Also, we found that the shortest Sn0.7Cu solder line, 250 μm, has most serious EM damage among three solder lines of different lengths. The back-stress induced by EM might not play a significant role on the EM test of long solder lines. A new failure mode of EM test, i.e., EM under an external tensile, was observed. The external stress would be superimposed on the stress profile induced by EM. As a result, the hillock formation at the anode side was retarded and void formation at the cathode was enhanced.
UR - http://www.scopus.com/inward/record.url?scp=33746543617&partnerID=8YFLogxK
U2 - 10.1109/ISAPM.2005.1432045
DO - 10.1109/ISAPM.2005.1432045
M3 - 會議論文篇章
AN - SCOPUS:33746543617
SN - 0780390857
SN - 9780780390850
T3 - Proceedings of the International Symposium and Exhibition on Advanced Packaging Materials Processes, Properties and Interfaces
SP - 54
EP - 59
BT - Proceedings - 2005 10th International Symposium on Advanced Packaging Materials
T2 - 2005 10th International Symposium on Advanced Packaging Materials: Processes, Properties and Interfaces
Y2 - 16 March 2005 through 18 March 2005
ER -