... ) surface finish: HAL 4)Certificate:UL,ROHS,REACH,ISO9001, 1)10-layer HAL PCB 2)surface finishing:HAL 3)board thinckness ... ,T/S16949ITEMSSPECIFICATIONLAYER1-26BOARD MATERIALFR-4,CEM-1,CEM-3BOARD THINCKNESS0.2mm-6.0mmCAMBERD≤0.75% (DOUBLE SIDE)D≤0.7%(MULTILAYER ...