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 / -spacing min. annular ring
12µm 75µm 100µm
18µm 100µm 100µm
35µm 125µm 100µm
70µm 200µm 200µm
105µm 250µm 250µm
140µm 300µm 300µm

Outer layers

Final copper* min. conductor trace width / -spacing min. annular ring
30µm** 75µm 75µm
35µm 100µm 100µm
70µm 200µm 200µm
105µm 250µm 250µm
140µm 300µm 300µm
210µm 500µm 500µm
400µm** 900µm 900µm

* After electroplating (approx.) / ** only on request / prior consultation