Introduction The purpose of the hints is to help speed up and improve the quality of your PCBdesign. General design guidelines There is a variety of different BGA pitches around today. From the popular1.27mm through 1.0mm, 0.8mm and down to 0.5mm pitch. The most important task to do before starting the design is to consult with your PCB manufacturer to finalize the best traces/clearances of the traces in order to define if one or two traces will go in between the BGA pads. Deciding upon via sizes and drills is next in line. Most PCB manufacturers can handle 4mil traces with 4mil space. Since BGA dimensions are in mm it is preferred to design the PCB on mm grid and mm parameters.