4PCB Design Requirements

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These are the specs for 4PCB's $33/each and $66/each prototype boards:

  • 30" maximum board area 4 layer, 60" 2 layer
  • 0.005" minimum silkscreen width
  • 0.005" minimum soldermask sliver
  • 0.006" minimum trace width and spacing
  • 0.015" vias w/ 0.027" annular ring
  • 0.010" annular ring minimum
  • 35 holes maximum per square inch
  • Thermal relief minimums
  • 0.010" expansion
  • 0.005" air gap
  • 0.007" conductor width