quick-turn-hdi-pcb. HDI PCB boards. We make quick turn HDI PCB from 4 layer to 50 layers. it’s higher quality PCB boards. and the lead time is short. we can finish 4 layer HDI PCB in 5~6 days. 6~8 layers HDI PCB in 8 to 10 days. and 10 to 14 layers HDI PCB in 12 days.