KEDING is well-known as one of the professional fr4 double layer pcb manufacturers and suppliers in China, which is equipped with ... Silver(IAg), CarbonInk, Hard Gold(Flash Gold), Soft GoldSolder mask color; Green, Blue, Black, Red, Yellow, White, Clear,Silk screen ... color :White, Black, Yellow, Green, Red, BlueBlind Vias : YesBuried Vias : ...