Buried Via HDI PCB

A 6-layer HDI PCB with buried vias, built on Shengyi S1000H FR-4 with ENIG surface finish. Buried vias connect specified inner layers without breaking out to either external surface, freeing the top and bottom layers for dense component placement and shorter critical traces. The 6-layer construction with buried via structure delivers high-density interconnection while keeping fewer total layers than a comparable through-hole design, which lowers cost without sacrificing routing flexibility. Inner-layer copper provides solid power and ground reference planes, improving impedance control on signal layers. Suited to consumer electronics motherboards, industrial controller boards, IoT gateway boards, telecom CPE devices and smart-home hubs where dense routing and reasonable cost both matter.