... Laminate MaterialsFR-4,FR-1,,FR-2,CEM-1,CEM-3Process Requirements: Solder MaskColorgreen,light green,white,black,dark ... ),S/G plating,ENEPIG,G/F plating,carbonQuality Control: Electrical testing Flying Probe TesterYControlled Impedance Tolerance±10 ... sound quality management system,Ensure the quality of all products High precision manufacturing Shenzhen 1-22 layer FR4 PCB board and Aluminum PCB with ...