What is a multilayer PCB?
It is a PCB made with three or more conductive copper layers. The conductive foil appears to be various layers of a multi-sided circuit board. The different inner layers are processed in pairs (on a core) and then bonded together using prepreg as the insulating layer. The layers are then placed in such a way that both sides of the PCB can be used to mount components with additional tracking/electrical connections on the inside of the board. Vias are used as a source of the electrical connections between the different layers of a multilayer PCB.
Many products use multilayer PCBs, including computers, medical equipment, in-car systems, GPS and satellite systems, industrial control systems
Please contact your local NCAB Group company if you need further information or assistance, we are happy to help you.
|NCAB´s technical specification
|Number of layers
|4 – 22 layers standard, 30 layers advanced, 40 layers prototype.
|Multiple layers of epoxy glass fiber bonded together with multiple layers of copper of varying thicknesses.
|High performance FR4, halogen-free FR4, low loss and low Dk materials
|Copper weights (finished)
|18μm – 210μm, advanced 1050μm / 30oz
|Minimum track and gap
|0.075mm / 0.075mm
|0.40mm – 7.0mm
|580mm x 1080mm, advanced 610mm x 1400mm
|Surface finishes available
|HASL (SnPb), LF HASL (SnNiCu), OSP, ENIG, Immersion Tin, Immersion Silver, Electrolytic gold, Gold fingers
|Minimum mechanical drill
|Minimum laser drill
|0.10mm standard, 0.075mm advanced
Download our design guidelines for Multilayer circuit boards
To prevent getting it wrong from the start, we have put together our design guidelines, to use as a checklist.