| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8022211 | Materials Letters | 2013 | 4 Pages |
Abstract
Sn-3.5Ag solder reacted with heat-treated Cu films, and the characteristics of Kirkendall void formation at the Cu3Sn/Cu interface were investigated. Heat-treatment for the suppression of Kirkendall void formation in Sn-3.5Ag/Cu solder joints was conducted at varying temperature (T=400, 500 and 600 °C). The results showed that S segregation on the void surfaces were effectively suppressed by heat-treatment, and Kirkendall voiding at the Cu3Sn/Cu interface decreased as the heat-treatment temperature was increased. According to the solid solubility limit of sulfur in Cu, S in Cu film was in solid solution at all heat-treatment temperatures, so the amount of sulfur segregation was reduced.
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Physical Sciences and Engineering
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Authors
S.H. Kim, Jin Yu,