4 layer RO4350B PCB with blind and ENEPIG

4 layer RO4350B PCB with blind and ENEPIG designed by High Speed Intergated Circuits Lab.

This PCB material is all Rogers 4350B 6.6mil, the stackup is as below.

TOP

Core RO4350B   6.6mil

L2 

PP RO4450F  8mil

L3

Core  RO4350B 6.6mil

L4

Total thickness is 0.7mm

The key technology is the pad size is the same as  trace with only 4mil .and the PCB finish is ENEPIG ,and blind vias.

Also,blind vias from L1-L2, L3-L4. min hole 0.15mm

4mil trace /space and the pad size too at the main chip zone.

Storm Circuit makes a lot of RF/High Frequency  PCB with ENEPIG and Blind vias or buried vias ,from 2 layer to 12 layer RF PCB,high speed intergrated circuits .