Volume Shrinkage-Induced Voiding Mechanism During Electromigration of Cu/Ni/Sn-Ag Microbump.
J Nanosci Nanotechnol
; 20(1): 278-284, 2020 01 01.
Article
en En
| MEDLINE
| ID: mdl-31383167
ABSTRACT
The effects of annealing, electromigration, and thermomigration on volume shrinkage and voiding mechanisms of Cu/Ni/Sn-2.5Ag microbumps are systematically investigated by using in-situ scanning electron microscopy under current stressing of 1.5×105 A/cm² at 150 °C. The resistance increases rapidly in the initial stage due to formation of intermetallic compounds (IMC)s followed by a gradual increase in resistance. Growth of Ni3Sn4 IMCs is controlled by a diffusion-dominant mechanism, and voids and volume shrinkage are closely related to IMC phase transformation of (Au, Ni)Sn4 to Ni3Sn4 in microbumps.
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01-internacional
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MEDLINE
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En
Revista:
J Nanosci Nanotechnol
Año:
2020
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Article