Mastering 50Ω, 75Ω, and 100Ω Controlled Impedance in High Density Interconnect PCBs
High Density Interconnect (HDI) PCBs have become the backbone of modern electronics, enabling the miniaturization of smartphones, automotive camera modules, wearable medical devices, and high-speed networking equipment. As trace widths shrink and layer counts increase, controlling characteristic impedance is no longer a luxury—it is a fundamental requirement for signal integrity. Among the most widely specified