What kind of PCB board is called HDI board?
HDI board refers to the PCB in a more intensive line, mainly such as mobile phones, computer motherboards and other PCB traces fine and very close spacing.
1) .pcb. The most common suffix, a lot of PCB design files are the suffix, one of the most common is Protel99, PADS, in addition to including ZUKEN company Cadstar, CR5000, Altimum P-CAD,
Common printed circuit boards are made of low-end materials, such as: paper substrate, composite substrate, epoxy board (also known as 3240 epoxy board, phenolic board), FR-4 glass fiber board (puzzle plate)
