... 3milIC Hole : 5milMin. Hole SizeBoards thickness<2.0mm0.2mmBoards thickness<1.2mm0.1mmBoards thickness≥2.0mmAspect Ratio ≤ 10Max. Board ThicknessSingle, Double- ... 3, Ceramics, Flexible, Rigid-FlexSolder Mask(SM)SM Opening (mil)2/4SM Bridge (mil)6ColorWhite, Black, Blue, Green,Yellow, Red, ... the samples for quality check when all is confirmed. aluminium pcb led round pcb Aluminum LED PCB for LED light