The so-called interconnect ribbons – tinned copper ribbons that are soldered onto the silicon wafer – take away the energy produced photoelectrically. The connection of these interconnect ribbons with the rectifier takes place via the so-called busbars – slightly larger copper ribbons that are also tinned.
FUHR supplies highly productive rolling mills for the rolling of interconnect ribbons and busbars from round copper wire. The rolled ribbons are formed into coils and can then be annealed and tinned in later processes.
High requirements as to dimensional accuracy and straightness of the ribbons are placed on the rolling mill, since only this allows smooth further processing of the ribbon.