Package characteristics
STM32F103xx
60/67
Figure 28.
Recommended PCB design rules (0.80/0.75 mm pitch BGA)
Dpad
Dsm
Dpad
0.37 mm
Dsm
0.52 mm typ. (depends on solder
mask registration tolerance
Solder paste
0.37 mm aperture diameter
– Non solder mask defined pads are recommended
– 4 to 6 mils screen print