are protected by the adjacent substrate layers. The soldering mask soldermask is made of a fluid substance like an ink and circuit placa imprimat is applied in a thin layer similar to varnish on the entire surface of the printed circuit less on the soldering pads and it
on the top layer of the PCB and has the role of a reference indicator for the components on the PCB. Graphics circuit imprimat placa 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 available: yellow, black, blue, red.
between the components. The increase in the need for multilayer printed circuit boards with more than two, four and especially more than six layers of copper has been concurrent with the adoption of surface mount technology. "Through holes" placa circuit imprimat components are assembled by their legs passing through the board and glued