Our Product Range 4-28 layer of high-precision impedance, blind & buried layers, HDI boards, high frequency board, halogen-free boards, high-TG boards, aluminum, copper, iron base and ceramic-based circuit board, 1-6 layer flexible circuit board ( FPC) and rigid-flex flexible board, and other high-tech products. PCB Process Capability processing layers: 1- 30 layers Finished thickness: 0.008 "~ 0.24" (0.20mm ~ 6.0mm) Minimum aperture: 6mil (0.15mm) Minimum line width / spacing: 3-4 mil (0.076-0.10mm) Maximum board size: Single & Double 22 "x 43" (550 x1100mm), Multi-layer 22 "x 25" (550mm x 640mm) Impedance Control: ± 10% Surface Treatment: OSP, HASL, Electric Nickel / Gold, Chemical nickel / gold, lead-free HASL , Gold finger, immersion Silver, Immersion Tin. Base materials: FR4 ( ShengYi, KB, International), high TG (TG150, TG170), halogen-free board (Halogen-free), High frequency plate (Rogers, Teflon, Taconic), made PTFE (PTFE), AL aluminum plate (Berquist, Al-made basis), copper (Cu Base), Iron (Fe Base), Ceramic substrate (Ceramic Base)