... .Since established, we have been committed to the professional high-precision single-double-sided and multi-layer printed circuit board ... , HDI, and other special circuit boards. Fast delivery, high quality and reliable credibility are our company's first comparative advantage ... -28 layer2MaterialFR-4,CEM-1,CEM-3,Hight TG,FR4 Halogen Free,Aluminum, Ceramic, Rogers,F4B,Teflon3Board thickness0.2mm-6 ...