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circuit board's PCB are usually printed with a non-conductive permanent epoxy ink. The color is usually white, although other colors are available: yellow, black, blue, red. Screen printing is used strat imprimat un circuit to render useful information on the PCB board that can help users during assembly. It is used to mark component values, part
makes it possible to measure the quality of copper tracks. The impedance is an alternating current (AC) characteristic that increases with frequency strat un imprimat circuit and becomes critical for printed circuits operating at frequencies above 200 or 300 Mhz. Impedance calculator software is a good starting point to determine the track width (w) and