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Gerber Files Checklist Before Sending to a PCBA Manufacturer
Gerber files are the manufacturing language of PCB fabrication. They define every layer, pad, trace, and hole required to produce your board.
Before sending files to a PCBA manufacturer, it's essential to verify that your Gerber package is complete and accurate.

1. Verify All Required Layers

Typical Gerber layers include:

  • Top Copper
  • Bottom Copper
  • Inner Copper Layers
  • Top Solder Mask
  • Bottom Solder Mask
  • Top Silkscreen
  • Bottom Silkscreen
  • Board Outline

Missing layers can halt production or lead to manufacturing errors.

PCBA Gerber files

2. Include Drill Files

NC Drill files specify:

  • Through holes
  • Blind vias
  • Buried vias
  • Mounting holes
Always confirm drill files are exported correctly.
3. Check Board Outline
The board outline determines the final PCB dimensions.
Verify:
  • Overall dimensions
  • Slots
  • Cutouts
  • Routing requirements
4. Review Gerbers Using a Viewer
Before submission, open the files using a Gerber viewer.
Look for:
  • Missing copper areas
  • Layer misalignment
  • Text overlap
  • Unexpected traces
Many design errors can be discovered in minutes during this review.
5. Confirm Silkscreen Placement
Ensure silkscreen markings:
  • Are readable
  • Do not overlap pads
  • Clearly identify components
6. Attach Assembly Files
For PCB assembly, Gerbers alone are not enough.
Also provide:
  • BOM
  • Pick-and-Place File
  • Assembly Drawings
  • Special Instructions

A thorough Gerber review prevents delays, reduces engineering questions, and helps ensure your PCB moves smoothly from design to production.