Latest Rigid-Flex PCB: 8 layers - 6 stacked microvias - 2/2 trace/space on Flex - .016” rigid thicknessLatest Rigid PCB: Integral Zeta material - .0015” spacing between pads - ENEPIG finish - .003” square pads - .002” traceCavity PCB: 7 layers - 0.1290” thickness - .006” copper-filled vias - .100” deep cavity