Screen Printers

The Solar Power Laboratory has three screen printers for feature sizes down to under 50 µm. An MPM printer is used for routine screen printing of the aluminum back surface field. The AMI printer is used for silver paste printing and is capable of optical alignment for more automated screen printing. In all cases, the maximum wafer size is 156 mm, and all of the printers are capable of operating with both mono and multicrystalline wafers.