Blind Vias PCB & HDI PCB, use micro blind vias to increase the trace distribution density. Improve radio frequency, electromagnetic wave interference and hear conduction. Apply Blind Vias PCB & HDI PCB to computer server, mobile phone and digital camera products.HUIHE CIRCUITS is China hdi pcb factory, Our blind buried via PCB has passed ISO9001/ISO13485/IATF16949/UL/RoHS/REACH certification. Are PCB Boards With Blind And Buried Vias Called HDI PCB? HDI circuit boards are high density interconnect PCB. The high density PCB that are plated with blind holes and then laminated are all HDI boards, which are divided into first-order, second-order, third-order, fourth-order, and fifth-order HDI. Simple buried vias are not necessarily HDI. .