A study on influence of soldering time on solderability and intermetallic compound formation between Sn-1.0Ag-0.5Cu lead-free solder and copper substrate
Abstract:
This research studied on influence of soldering time on solderability and intermetallic compound formation between Sn-1.0Ag-0.5Cu lead-free solder and copper substrate. In the experiments, reflow soldering was performed at 300 ๐C under variable soldering times of 20, 40, 60, 80, 100, 120 and 240 s. The experimental results revealed that the solderability of the solder was improved with the increasing the soldering time. However, the thickness of intermetallic compound layer exhibited a non-uniform pattern, because of the dissolution of the copper substrate. In addition, intermetallic compound founded at the interface was Cu6Sn5 in all cases.