... about the led aluminum base pcb: 1.FR4,double-sided pcb,1.0mm,1OZ,Lead Free 2.17 years experience in PCB,s Processing ... with MIL-SLD-105 II,heavy defeat AQL=0.65,light defeat AQL=1.022Quality StandardsNational andards:GB5488.2-88 Metal ... -based holeDouble-sided PCB technical conditions International Standard:IPC-A-600EEnterprise Standard:APC-STD ...