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Wave Soldering vs. Reflow Soldering (December 27, 2017 - PCB Articles)

PCB Corrosion Causes (December 18, 2017 - PCB Articles)

Guide to Wave Soldering Problems for PCBs (December 13, 2017 - PCB Articles)

Guide to PCB Stiffeners (December 11, 2017 - PCB Articles)

IC Packaging (December 4, 2017 - PCB Articles)

How to Measure Solder Mask Thickness (November 21, 2017 - PCB Articles)

Printed Circuit Board Manufactruing Process (November 6, 2017 - PCB Articles)

Halogen-Free PCB (November 2, 2017 - PCB Articles)

How to Clean Printed Circuit Boards (October 26, 2017 - PCB Articles)

The History of Printed Circuit Boards (October 4, 2017 - PCB Articles)

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PCB Glossary

Fiducial Mark
Fiducial marks are dots etched on board panel for which SMT assembly is required (provide viewing targets for camera to locate correct position). These marks should be in diameter of approx. 0.06″ and free from solder mask. There should be 2 sets of fiducials if fine-pitch components are use. The first set is called the panel mark, one for each panel corners (at lease .5″ from any panel tooling holes). The second set is called the local mark, one for each fine-pitch IC located at the absolute center position of that IC.