| 摘要 |
PURPOSE: A PCB for impedance control is provided to insert one resin deposition film between standard plural resin deposition films to regulate impedance of narrow band. CONSTITUTION: A PCB for impedance control comprises first and second standard resin deposition films(10,30) and a single resin deposition film(20). The standard resin deposition films(10,30) consist of resin deposition films(13,43) having constant thickness, copper films(11,31) coated on one side of the films(13,43) and resin layers(14,34) coated on the other side of the films(13,43). The resin of the layers(14,34) is under semi-cured state. The resin deposition film(20) is inserted between the layers(14,34) to regulate the thickness of overall insulator.
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