Complete OEM assembly. Handle all customers' needs for PCB assembly. Small order quantity accepted. According to customer's requirements process2 layersPCB assemblySolder mask: wet green paint, dry green paint, and UV paintBase material: FR-4, 94vo, CEM-1, CEM-3 and 94HBSurface finish: hot air solder leveling (tin, tin lead), immersion gold (tin, silver), OSP, selective immersion gold and gold ...