Definition

Embedded capacitors are capacitive elements built into the PCB using thin, high-dielectric-constant materials between power and ground planes. Technologies include laminated high-Dk sheets (like 3M C-Ply or Oak-Mitsui FaradFlex) and discrete capacitor embedding. Embedded capacitance provides power supply decoupling with lower inductance than surface-mount caps, effective above 100 MHz where discrete caps lose effectiveness. Capacitance values are typically 0.5-2 nF/sq inch, suitable for bulk decoupling, not precision timing.