Factors Affecting PCB Thickness
In many instances, PCB thickness needs to be controlled tightly for optimum PCB performance. So, the combination of PCB core materials used is critical to functionality, and the thickness or type of each layer matters.
A Printed Circuit Board consists of multiple layers, which typically include:
- Insulating layer – Dielectric material
- Conductive layer – Copper foil. The varying copper thickness impacts a circuit’s ability to achieve the correct amount of current flow and determines the amount of loss.
- Prepreg layer – is a fiber weave impregnated with a resin bonding agent used to bond the core layers together.
- Solder mask – a layer of polymer that is usually applied to the copper traces of a printed circuit board for protection against oxidation
The final board thickness is the sum of the thickness of the above layers.
PCB Thickness Options
The combination of various core thicknesses and prepreg layers results in a wide range of finished PCB thicknesses. Our standard board thickness options are:
- 0.031″ / 0.79 mm
- 0.047″ / 1.19 mm
- 0.062″ / 1.57 mm
- 0.078″ / 1.98 mm
- 0.093″ / 2.36 mm
However, we can fabricate your PCB to any thickness specified in your design.
We can manufacture rigid PCBs with a thickness of 15.7mil / 0.40 mm with solder mask, and 8mil / 0.20 mm without a solder mask.