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PCB Design Rules & DFM


  • 1. What is the minimum silkscreen text height and line width?
  • 2. What is the minimum drill-to-copper clearance for PCBs?
  • 3. What is the minimum annular ring width for drilled holes?
  • 4. What is the default solder mask expansion over copper pads?
  • 5. Does 0.2mm trace-to-pad clearance meet your PCB design rules?
  • 6. Will you remove silkscreen overlapping copper pads in KiCad design?
  • 7. Can I keep 6 mil trace width and clearance on a 4-layer PCB with 2mm thickness and 2oz copper?
  • 8. Will you flag or auto-fix DRC violations in uploaded Gerber files?
  • 9. What copper-to-board-edge clearance is required for PCB manufacturing?
  • 10. What are the minimum PCB trace width and spacing rules (0.127mm/5mil)?
  • 11. How to calculate 50-ohm trace width on a 4-layer FR4 PCB?
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