a non-conductive permanent epoxy ink. The color is usually white, although other colors are available: yellow, black, blue, red. Screen printing is used to render useful information on the PCB board that can help circuite imprimate productie users during assembly. It is used to mark component values, part numbers, test points, polarity, etc. Screen printing does not
(w) and insulation thickness (h) of a imprimate circuite productie given impedance. In terms of signal traffic in printed circuits, when the tracks carry signals at high frequencies, great care must be taken in designing the tracks to match the impedance of the upstream and downstream components. The longer the route or the higher the frequency,
carefully controlled to ensure consistent impedance. In RF and fast switching circuits, the inductance and capacitance of the printed circuit board conductors become significant, usually unwanted, circuit elements; rather, they can be used as part of the circuit design, as in distributed element filters, antennas, and imprimate circuite productie fuses, avoiding the need for additional separate