Abstract
A wave soldering system has been used for more than 50 years in the process of circuit board assembly, but the needs for maintenance-free operations, high solderability, and downsizing of the solder capacity have still not been met. To meet these requirements, the authors made practical use of a wave soldering system in which a direct thrust is applied to the molten solder by means of a linear electromagnetic pump, thus realizing maintenance-free system, a 1/10 to 1/20 reduction of the defect rate, and a 57% reduction of the solder capacity.
