... single-sided,double-sided,multilayer PCB 3)PCBA,layout designed light dimmer pcba PCBA specific instructionMaterial:FR-4Layer: 2 layersSurface finish ... screen: WhiteThe othere surface finish we could do are; Gold finger, OSP, ENIG, HAL, Gold plating, Chemical silver, etc.The other ... 3. 20-25days, with customers request and our new design light dimmer pcba