... layer FR4 PCB board and Aluminum PCB with RoHS and UL certificate - Contract Manufacturing- Engineering Services- PCB Design & ... ,,FR-2,CEM-1,CEM-3Process Requirements: Solder MaskColorgreen,light green,white,black,dark brown,yellow,red,blueMin. solder ... microinch18). Profiling: Punching, Routing, V-CUT, Beveling19). Certificate: UL,ISO 9001,ISO14001,ROHS20). We have a sound quality management ...