4L rigid-flex board

Layers  :  4L
Stack-up :1R+2F+1R
Thickness    1.2mm
Out Layer Copper Thickness: 1 OZ
Inner Layer Copper Thickness: 1 OZ
Min hole size:0.3mm
Min Line Width/Space:  4mil
Surface finish :ENIG
Application : Unmanned Aerial Vehicle /UAV/drones
Features: high complexity :/