Definition

Ohmega-Ply is a nickel-phosphorus (NiP) or nickel-chromium (NiCr) resistive film bonded to copper foil, manufactured by Ohmega Technologies. It's laminated into the PCB stackup, then the copper is etched to define resistor shapes while the resistive layer provides the resistance. Available in sheet resistivities from 25Ω/sq to 250Ω/sq, Ohmega-Ply enables tolerances of ±5-10% with laser trimming, suitable for precision applications. The thin-film technology offers better TCR (temperature coefficient of resistance) than thick-film carbon alternatives.