Brief description about the led aluminum base pcb: 1.FR4,double-sided pcb,1. ... StandardNO.ITEMTechnique Data1Product TypeAluminum base,Double-sided aluminum base2SubstrateDomestic aluminum plate,TAIWAN Domestic aluminum plate,Bergquist material,Japan aliminum plate 3Base ... 0W/m-k,High-conductivity5SurfacePlated gold,Imm gold,Plate Silver,Imm Silver,OSP,HASL,Imm Tin6Production Size500*600MM,500*1200MM, ...