pcb board wireless: 1, KB base material 2,flash gold, 35um,2-layers 3.free sample 4.best ... : Product Categories:single/double sided board, multi-layer board, high density board, including MLB with blind/buried ... core AluminumSurface Finish:Hot air Lev p lead free HASL, immersion gold/silver/tin, plating gold, ... core thickness 0.15-1.5mm, finished board thickness 0.20-3mmCopper Foil Thickness:1/3 ...