... FR4, Au. 2.Short Lead Lime. 3.UL,RoHS,SGS, ISO9001:2000 4.11 years PCB experience. PCB Boards Capability ... Material: FR4, High TG FR4,Halogen Free material,CEM-3, Rogers HF material, etc. Layer ... Surface Treatment: HAL, Lead Free HAL, Immersion gold, OSP, Immersion tin, Immersion silver, etc. Other Technology: Gold finger, peelable mask, Non-across blind/buried ...