... service, We can offer 1 to 22 Layer PCB fabrication, PCB design, PCB layout, PCB manufacturing, PCB Assemblies, components sourcing, PCBA Function Test, design solution.Needed ... HASL, Immersion Gold, Gold plating,Immersion silver, immersion Tin, OSP.8) Copper thickness: 0.5oz to 6oz.9) Solder mask color ...