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usage, the term "printed circuit board" dublu imprimat placat circuit 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 almost all electronic products and some electrical products. Currently, the
layers of material are laminated together in an alternating sandwich: copper, substrate, copper, substrate, copper, etc.; each layer of copper is etched and any internal sleepers (which will not extend to both outer surfaces of the finished multilayer board) are plated dublu imprimat circuit placat before the layers are laminated together.