Tolerance Resource
PCB manufacturing tolerances for engineering review.
PCB tolerances affect drilling, routing, copper features, board outline and assembly fit. Critical requirements should be stated before production planning.
| Tolerance area | Review focus | Manufacturing note |
|---|---|---|
| Board outline | Finished size and routing requirements | Provide a clear outline layer |
| Drilling | Hole type, slot and annular ring needs | Include drill files and notes |
| Copper features | Trace, spacing and copper weight | Important for fine line and heavy copper PCB |
| Assembly fit | Connector and enclosure constraints | Include mechanical drawings when needed |
Need tolerance review?
Send files and critical mechanical notes to engineering.