... lead free tg170 build-up multilayer pcb, immersion gold multilayer pcb with gold finger manufacturers, Rigao Electronics is a professional rohs ... .075mm(3mil)8Surface finish/treatmentHASL/HASL pb free, Immersion gold, Immersion Sliver, Immersion tine,OSP(Entek),S/G plating ... Outdoor Activities1,We went to the shenzhen wutong mountain, phoenix mountain, Qingyuan and had a good time 2,Annual Meeting ...