Laser solder welding system of PCB

The laser was used as heat source to weld the terminal of PCB. The automatic tin wire feeding system was mounted between the focus head of laser and PCB. Before the laser welding, the laser was used to preheat the PCB, then the tin wire was fed to the underneath of the focus head of laser. The tin wire was melted into droplet by high power laser, transferred to the PCB, and formed the tin welding spot.