... after sales service. Specializing in Double Side PCB, Multi-Layer PCB, F4BK PCB, Ceramic PCB, Rogers PCB, Aluminum PCB.1.Single-sided, double-sided and multi ... silk-screenWhite, Black, Yellow ect.15E-Testing100% E-Testing (High Voltage Testing); Flying Probe Testing16Special technological requirementBlind & Buried Vias and High Thickness copper17Thickness ...