Provide at least three global fiducials per assembly side for pick-and-place alignment, plus local fiducials at diagonally opposite corners of fine-pitch ICs (QFP, BGA). Use a 1 mm copper circle with 3 mm mask clearance and no silkscreen overlap.
- Minimum 3 global fiducials per assembly side for SMT pick-and-place alignment
- Local fiducials required for fine-pitch ICs (QFP, BGA) — place at diagonally opposite corners of the package
- Fiducial style: 1mm copper circle with 3mm solder mask clearance, no silkscreen overlap