... years of experience in PCB industry 4.UL,SGS,ISO9001,RoHS,QS9000 and TS16949 Layer:1~22 layersMaterials: FR-4, CEM-3, Teflon, ... Aluminum, Rogers, High TgSurface finished:Lead Free HASL,Immersion Gold/Tin/Silver, OSP ... the above description is to demonstrate the ability of our PCB factory, if you have specific requirements, please feel free ...