serigraphy or silkscreen for short, is done on the top fisiere Gerber layer of the PCB and has the role of a reference indicator for the components on the PCB. Graphics and text on a circuit board's PCB are usually printed with a non-conductive permanent epoxy ink. The color is usually white, although other colors are
with electronic components is called Gerber fisiere a printed circuit assembly, printed circuit board assembly, or PCB assembly (PCBA). In informal usage, the term "printed circuit board" most commonly means "printed circuit assembly" (with components). Components are generally soldered to the PCB both to connect them electrically and to fix them mechanically. Printed circuit
on and/or between layers of conductive substrate sheets. A printed circuit board can have several Gerber fisiere layers of copper which are almost always arranged in pairs. The number of layers and the designed interconnection between them (vias, PTHs) gives a general estimate of the complexity of the board.