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Indexed by:会议论文

Date of Publication:2009-01-01

Included Journals:CPCI-S

Page Number:590-593

Abstract:The effect of electromigration on the solid state interfacial reaction of pure Sn and Cu was investigated. Two electron current densities (1.0x10(4)A/cm(2) and 5.0x10(3)A/cm(2)) were applied to line-type Cu/Sn/Cu interconnect at 150 degrees C. The same types of intermetallic compound (IMC), Cu(6)Sn(5) and Cu(3)Sn, formed at the Sn/Cu interfaces independent of electric current. A high current density caused a polarity effect where the IMC layer at the anode grew significantly thicker than that at the cathode. The growth of IMC was enhanced by electric current at the anode, comparing with that of the samples without applying current. The growth of IMC at the anode followed a parabolic growth rule. After current stressing for 100 hours with a current density of 1.0x10(4)A/cm(2), microcrack formed at the interface between IMC and solder at the cathode side, while there was no crack formed even after stressing for 200h with a current density of 5.0x10(3)A/cm(2).