LAYER - 6Layer (FLEXIBLE 2layer+RIGID 4layer) 6-2-6 Application Inspection equipment of Semiconductor Thickness - 0.5T Structure - 1-2LBVH ,2-3L BVH 1-4 STACK BVH , 4-6BVH , 56BVH Machine Drill Min. 0.25mm Cu Plating VIA FILL + PTH BGA(LAND/PITCH) - 0.3mm / 0.4pitch PSR GREEN Surface treatment ENIG