than the signal paths. In a multi-layer board, an internal layer may be imprimate circuite productie mostly solid copper to act as a ground plane for shielding and power return. For microwave printed circuits, transmission lines can be laid out in a planar form, such as stripline or microstrip, with
the most common are the four-layer ones. The four-layer board has many more routing options in the internal layers compared to the two-layer board, and often part of imprimate circuite productie the internal layers are used as a ground plane or power plane, to achieve better signal integrity, higher signaling frequencies, and better power
to render useful information on the PCB board that can help users during assembly. It is used imprimate productie circuite to mark component values, part numbers, test points, polarity, etc. Screen printing does not influence the printed circuit and the possible problems that may appear may be slight discolorations due to the high temperatures for gluing the