One of the special features of our products is our high frequency boards, from Rogers 3000 series to 4000 series, from Metron4 to Metron6, in all kinds of materials. We know that the most strict control accuracy of line width pitch and impedance accuracy is the most important thing for high frequency boards. Therefore, we will have special etching parameter table for high frequency boards, which is different from ordinary multilayer boards, and also the parameters of plating are different when doing graphic plating. High-frequency materials are expensive, so we must achieve a pass rate of 90% or more to ensure profitability. We are serious about doing high frequency boards!