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26 SMT Magazine • March 2014 FEaSIBILITY OF LOW/NO SILvEr aLLOY SOLDEr PaSTE maTErIaLS continues feaTure figure 8: Wetting test results of various lead-free alloy solder pastes. Figure 9: Solder ball test results: good solder paste materials. Figure 10: Solder ball test results: Many alternative alloy solder pastes resulted in excessive solder balls.