PCB core and prepreg are different material forms used for different functions in a multilayer stackup. A core is cured laminate, normally supplied with copper
ENIG and ENEPIG are both flat, solderable PCB surface finishes. ENIG uses electroless nickel and immersion gold. ENEPIG adds an electroless palladium layer between the
Neither structure wins every stripline vs microstrip comparison. Microstrip places the signal on an outer layer, which favors direct component launches, probing, and fewer layer
A PCB annular ring is the copper land between a drilled hole and the outer edge of its pad. For a centered circular pad and
An eye diagram overlays repeated digital transitions to show voltage and timing margin at a selected measurement point. A wide, tall opening usually indicates a
IPC J-STD-001 defines material, process, inspection, and acceptance requirements for soldered electrical and electronic assemblies. It helps OEMs, EMS providers, engineers, and quality teams specify
