The following table shows the maximum allowed conductor trace width with the minimum conductor trace spacing, depending on the respective copper thickness.
Inner layers
| Copper thickness | min. conductor trace width / space | min. annular ring |
|---|---|---|
| 12µm | 75µm/100µm** | 90µm |
| 18µm | 90µm | 90µm |
| 35µm | 100µm | 100µm |
| 70µm | 150µm | 150µm |
| 105µm | 250µm | 250µm |
| 140µm | 300µm | 300µm |
| 210µm | 500µm | 500µm |
Outer layers
| Final copper* | min. conductor trace width / space | min. annular ring |
|---|---|---|
| 30µm | 75µm/100µm** 90µm | 90µm 90µm |
| 35µm | 100µm | 100µm |
| 70µm | 150µm | 150µm |
| 105µm | 250µm | 250µm |
| 140µm | 300µm | 300µm |
| 210µm | 500µm | 500µm |
| 400µm | 900µm** | 900µm |