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printed circuit assembly, printed circuit board assembly, PCB SADELEC 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 boards are used in

solder mask, the inner copper layers are protected by the adjacent substrate layers. The soldering mask soldermask is made SADELEC PCB of a fluid substance like an ink and is applied in a thin layer similar to varnish on the entire surface of the printed circuit less on the soldering pads and it also

to a revolution in the types and models of printed circuits. Technology has penetrated more and more areas of our lives and required modernization, and the printed circuit through its continuous improvement was one of the first SADELEC PCB aids that allowed this modernization. The smaller and smaller dimensions and the flexibility of the printed