Ordering your PCB with a Specific Thickness
When you order a PCB’s you select a ‘Board thickness’ as below.
This is the total thickness of the base materials (laminate) plus the selected copper thickness for that specific buildup.
This does not include the Base Copper, Copper Plating (Galvanic), Finial Finish Plating (Hal, ENIG etc.), Soldermask or Legend.
Our goal is to ensure that the thickness of the PCB is as close as possible to this selected value.
We always comply with the IPC-A-600 Acceptability of Printed Boards standards for PCB thickness measurement and tolerance.
The thickness of a PCB must be measured on an area of laminate that is free of Soldermask, copper and legend.
Therefore, if you have defined your PCB to be 1.55mm thick then this is from the top laminate surface to the bottom laminate surface.