Definition

Design for Manufacturability (DFM) means designing your PCB so it can be built reliably without special processing. Key DFM guidelines: use 6 mil (150µm) trace/space instead of 3 mil unless density requires it, specify 0.3mm drill sizes instead of 0.2mm where possible, maintain 6 mil annular rings, avoid acid traps (acute angles <90° where etchant pools), and keep 5 mil solder mask dams between pads. Following DFM rules reduces cost by 10-30% and improves yields. Request your fabricator's DFM guidelines before finalizing your design.