Routing/Mechanical – usually containing the outline of the circuit, including any internal cutouts.Drilling – there can be various layers for drilling, containing plated holes, non-plated holes and holes that are to be drilled through different parts of the stackup (the arrangement of layers).Copper Layers – these contain the conductive part of the design, things like your copper tracks, pads, component footprints and ground planes. ![]() The purpose of soldermask is to isolate and protect all areas of the PCBs that do not need to be exposed (for soldering). Soldermask – this is where PCBs get their distinctive ‘green’ color, although nowadays many different colors are available. ![]() Silkscreen – this is the (usually) white print on top of the PCB, which indicates component placement and other information, such as manufacturing date and serial number information.The main layers of interest are as follows: ![]() Secondly, we can discuss the types of layers that are involved in a PCB design.
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