4 layer pcb board with blind hole impedance control pcb boardIn the circuit having resistance, inductance and capacitance, the ... when, on the contrary, and this series circuit.4 layer Blind Via pcb board, one side of the hole in the board ... customizedFollowing are some types introduction for Rigid PCB and High Frequency PCB: FR4 PCB(2layer,4 layer,multilayer) Rogers(RO4003,RO4350,RO5880,RO3003,RO3010 ...