Saturn Electronics Logo
Pb-free Resource Center
Metal Core Resource Center
PCB Design Tools
IPC Standards
Clean Energy
Fabrication Processes
PCB Basics
Final Finishes
Quality Control
PCB Basics


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.

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.blind_via

Blind Via
Exposed only on one side of the board.
Blind Vias

Buried Via
Connect internal layers without being exposed on either surface.buried_via
Buried Vias

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

Surface Finish
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.