Silkscreen should carry a reference designator for every component, use at least 0.8 mm text height, mark polarity and pin 1 clearly, and never overlap pads or vias. Include the board name, revision, and a date-code area.
- Include reference designators for every component — critical for rework and inspection
- Silk text minimum 0.8mm height for legibility post-solder
- Do not place silkscreen over pads or vias
- Mark polarity clearly: + for cap positive, pin 1 indicator for ICs (dot, chamfer, or bar)
- Include board name, revision, and date code area in silkscreen