Broadband silicon capacitor is ideal for CPO co-packaged optics and NPO near-packaged optics, acting as DC-block for high-speed signal lines. It features insertion loss <1dB @150GHz and <0.5dB @67GHz with excellent high-frequency performance. The bottom-electrode structure enables compact routing without fan-out design, saves mounting space, reduces parasitic capacitance and improves signal integrity, outperforming traditional MLCC.