In this experiment, a Sn35Bi0.3Ag–xIn (x = 0, 0.5, 1.0, 1.5) alloy solder was prepared by electromagnetic induction heating furnace. The effects of on the thermodynamic properties, wettability, interface microstructure, and soldering performance Sn35Bi0.3Ag–xIn/Cu joints were studied synchrotron thermal analyzer (DSC), contact-angle measuring instrument, scanning electron microscope (SEM), ener...