... ),FR5,ISOLA(FR408,370HR),TEFLON,POLYIMIDE,ROGERS(RO4003,RO4350,RO4450),Aluminum plate (Single,Double-sided)FR4 Thickness1.6mmHigh TG FR4 (170 ... .1mmMin. space from annular ring to inner pattern0.1mmLayer-to-layer registration±0.003”(0.08mm)Solder MaskColorgreen,light green,matte ... unique business needs and then set out to surpass them. 2 Layer Immersion Gold PCB With Gold Finger