Definition

Silkscreen (or legend) is the printed marking layer on PCB surfaces showing component reference designators, polarity marks, pin 1 indicators, logos, and other text. Traditionally applied by screen printing with white epoxy ink, modern processes use inkjet printing for finer resolution. Silkscreen aids assembly and debugging but adds cost. Minimum line width is typically 0.15mm (6 mil), with 0.2mm (8 mil) for better readability. Silkscreen should not overlap pads or vias.