This paper characterizes the effect of various Sn-Ag-Cu solder compositions towards shear strength and melting behavior. Shear strength is measured by Dage which is representative of the inter-metallic compound (IMC) strength between the solder and solder clad of a C5 bump. Further study on melting properties will be obtained by Differential Scanning Calorimetry (DSC). It was found that 1wt% Ag 0.5wt% Cu has larger melting range compared to 3 & 4wt% Ag 0.5wt% Cu which could contribute to IMC growth. Relatively, ball shear results shows that shear strength increases with Ag wt% content. A correlation between melting range and shear results made in this study pointed to 3.8wt%Ag0.5wt%Cu having the most favorable results.
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