... ROHS, UL, ISO9001-2000, ISO14001Our Manufacturing Capability for PCB BoardMaterial type: Ployimide ( PI ), Ployester (PET), FR4Surface Treatment: immersion gold ... substrate cu substratematerial thermal conductivity1.0/m.k, 1.5/m.k, 2.0/m.k, 3.0 ... side al substrate /four-layer al substrte maximum measurement1200mm*460mm minimum measurement5mm*5mmline width/space0.1mmwarp and twist≤0.5%(thickness:1 ...