LAYER 4LAYER(FLEXIBLE 2L+RIGID 2L) 4-2-4-4 Application Industrial Equipment Thickness RIGID part 0.6T Structure 1-4L DRILL,1-2L,3-4L BLIND VIA Machine Drill Min. 0.2mm /HOLEPLUG+ CAP PLATING Laser Drill BVH Min. 0.1mm / PNL PLATING Cu Plating Min. 25 / NORMAL PALTING L/S 60/60 PSR GREEN Surface treatment ELECTRO HARD GOLD + ENIG