Semtek Corporation Semi-Conductor SCB 130 Wafer Soldering Bonder for Solar Cells . This semi-automatic PV soldering machine is designed to produce machine accurate stringer/tabber by soldering ribbon onto silicon wafer that have been printed with silver paste on front and back sides. Programmable control of hot head temperature. It can test the solar panel welding characteristics under pressure. 240v, 30a, 50Hz.