Request InfoNordson EFDNordson EFD has developed the Square Wave 745NC flux dispenser for noncontact precision jetting of low-viscosity flux onto solar cell bus bars. Operating at speeds up to 500 Hz/s, the device meets the photovoltaic (PV) industry’s need to deposit continuous lines of microdots on the solder-coated metal ribbons that connect adjoining PV wafers. Flux removes oxidation and contamination to improve solar cell efficiency and power output. 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