Detailed Product Description PCB manufacturerwe sell premier PCB manufacturer two side Layers Immersion Gold Board / PCB1.Number of Layer: 1 to 12layers.2.Base Material: FR-4, CEM-3,CEM1, Aluminum Substrate, Rogers, Halogen Free, High Tg.3.The color of soldermask and silkscreen: Green, White, Black, Blue, yellow, Red etc.4.Surface Finish: Lead Free HAL, HAL, Flash Gold, Immersion Gold, Immersion ...