... PCB assembly 2 layer,1.6mm,immersion gold 2 layer,1.6mm,immersion Tin 4layer,1.6mm,immersion gold,plated slot, 4layer,1.6mm,immersion gold,half holegold finger 4layer,2.0mm,immersion sliver 6layer,2 ... , impedance contro14layer, 1.6mm, matt green, BGA,impedance control With regard to our PCB prdocts,pleas find the following specification,table1 and ...