Basic PCB Definitions
Here you will find a glossary and other educational tools addressing bare board basics.
Copper layer connected to the ground that covers most of the board layer it inhabits.
Copper strip used for carrying signal between two points on a circuit board.
Metallized area serving as a conduit for vias resulting in an electrical connection to the trace.
Plated-through hole (PTH) between one or more layers for the purpose of transferring heat from top layer to inner and / or bottom layers connected to internal ground plane.
Exposed only on one side of the board.
Connect internal layers without being exposed on either surface.
Surface adhesive substance spread for bonding or coating, this material (most commonly FR-4) is the non conductive carrier of the board’s copper traces. PCB Substrates
Also known as Final Finish, it is selected by the customer. Assembly’s component process determines plating for the top and bottom layers. The different surface finishing processes are ENEPIG, ENIG, HASL, Pb-free HASL, OSP, Immersion gold, Immersion silver, and Deep Gold. Various factors considered during selection process include application and shelf life.