... ElectronicsShenzhen 1-22 layer FR4 PCB board and Aluminum PCB with RoHS and UL certificate - Contract Manufacturing- Engineering Services ... CEM-3Process Requirements: Solder MaskColorgreen,light green,white,black,dark brown,yellow,red,blueMin. solder mask clearance0 ... shapeCertificates UL Cert. YISO Cert.ISO9001 :2008TS16949YISO14000YManufacturing Capability for PCB Board 1). Material type: CEM-3,FR ...