Multi-Layer PCB High frequency PCB (Rogers, F4BK, Taconic ) Metal PCB (Al-based, Cu-based) HDI PCB assembly 2 layer,1.6mm,immersion gold 2 layer,1.6mm,immersion Tin 4layer,1.6mm ... .075mm(3*3mils)GilMin thin core0.05mm(2mils)Halogen free material (including high Tg)Min SMT pitch0.25mm(10mils)Anti-CAF ...