One of our special products is high frequency board, From Rogers3000 series to Rogers4000 Series , from Metron4 to Metron6 , from FR408HR to TU872 . we have all these material in stock . we understand High Frequency board required very strict fine line and impedance control . so we have special etching parameter , this is different with other multilayer boad etching .also pattern plating line parameter is different . cause these material is very expensive , so yield rate need to up to 90% , or we can’t make money . We believe we can do it . always here with you .