PCB Stack-Up Design - KKPCB
 
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PCB Stack-Up Design - KKPCB

HDI PCBs Explained: Stack-Up Choices, Via Strategies, and Cost Trade-Offs

What Actually Defines an HDI PCB? An HDI PCB (High-Density Interconnect PCB) is not defined by layer count alone, but by how efficiently interconnections are implemented. The key differentiators are: Microvias (laser-drilled vias) Blind and buried vias Fine line and spacing (typically ≤100 µm) High connection density per unit area The goal of HDI is...