Yichtech Electric Corporation Ltd is a professional manufacture PCB up to 12 Layers and FPC up to 8 layers of factory. And professional PCB manufacture to perfect PCB assembly and providing you with good quality and high efficiency ODM and OEM service. We specialize in Power ,Communication equipment , Remote control system,And consume electronic products. We have been recommending a hi-tech electronic products, and relying on our high quality. For more information about us and our products is available at www.yichtech DOTcom ,we sincerely invite you to visit our online catalogue. Please do not hesitate to contact with us (frank AT yichtech DOT com)if you have interest in our products.then I will give you competitive price . feature: Layers: 1 to 12 Layers Base Materials: FR4, High TG FR4, CEM1 Base Copper Thickness: 1OZ oz. to 3 oz. Board Thickness: 0.2mm-5.0mm Maximum Panel Size: 550mm x 710mm PTH Hole Tolerance: Plus or Minus 0.05mm Min Mechanical Hole: 0.2mm Min Laser Drill Hole: 0.075mm Minimum Line Width: 0.1mm Minimum Line Spacing: 0.1mm Surface Finishing: HASL; HAL; Immersion Gold/Tin/Silver; OSP; Gold Finger; etc. Minimum SMT Pitch: 0.40mm "(center to center) Electrical Testing: Voltage: 24V - 300V Continuity: 5 - 100Ohms Twist and Warp: Less than 1%