4-layers Rigid-Flex Board

Layers     4L
Stack-up ：2R+2F
Thickness  :  1.6mm
Out Layer Copper Thickness: 1 OZ
Inner Layer Copper Thickness:1 OZ
Min hole size : 0.4mm
Min Line Width/Space : 4mil
Surface finish : ENIG
Application ：LED Display / Consumer electronics
Features : multi-step connection