is generally green in color but can have different colors: green, red, blue, white, black. Only the outer layers need impedanta controlata cu imprimat circuit to be covered with solder mask, the inner copper layers are protected by the adjacent substrate layers. The soldering mask soldermask is made of a fluid substance like an
glued to the pads on the other side. "SMD" components are soldered on the same side of the board. A board can use both methods for soldering components. Today PCBs with components mounted only through holes are now less common. Surface mount is used for components like controlata imprimat circuit cu impedanta transistors,
for: fixing the electronic components in designated locations on the outer layers by gluing. provides reliable electrical connections between the component terminals in a controlled manner according to a predetermined controlata impedanta circuit cu imprimat scheme. Printed circuits are widely used in many fields: Consumer goods Military Aerospace Industrial Medical Naval The unprecedented development in recent years of all fields