The interfacial reaction between Pb-Sn solders and bulk Pd substrate is studied both in the liquid- and solid-state of the solder. The interfacial microstructures are characterized by imaging and energy dispersive x-ray analysis in scanning electron microscope. The correlation between the diffusion path and interfacial microstructure in 62Sn38Pb/Pd, 95Pb5Sn/Pd, and Pb/Pd diffusion couples is demonstrated by means of calculated isothermal sections of the Pb-Sn-Pd system and the metastable phase diagram of the Pb-Pd system.
- Diffusion path
- Interfacial reaction
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Materials Chemistry