... To Rigao ElectronicsShenzhen 1-22 layer FR4 PCB board and Aluminum PCB with RoHS and UL certificate - Contract Manufacturing- Engineering Services- PCB ... black,yellow,red,blue,greenMin. Size0.006”(0.15mm)Surface FinishHASL,HASL pb free,immersion gold,immersion silver,immersion ... ,Halogen Free,Rogers,Arlon,Taconic,Isola,PTFE, Bergquist2). Surface Treatment: HASL,HASL lead-free,HAL,Flash gold,immersion ...