1.Six-layered PCB Flex with Adhesiveless Material, 2.PTH 0.2mm, 3.PI Stiffener, ENIG Finishing Stack up : 1 layer double side CCL + 4 layer single side CCLBase material: 1/2mil PI and 1milCCL: 1mil PI, 1/3oz, adhesiveless, double ED copperCCL: 1/2mil PI, 1/3oz adhesiveless, single side ED copperCover layer: 1/2mil, 15umSurface treatment: ENIGStiffener: PISolder mask: N/AConductive layer: N/ ...