one of the first aids that allowed this modernization. The smaller and smaller dimensions and the flexibility of the printed circuit board made in recent years have greatly helped fields such as medicine and aeronautics to cablaje imprimate benefit from smaller and lighter equipment that has allowed them
higher the frequency, the better adaptation is required. When producing the printed circuit with controlled impedance, the impedance will be controlled by acting on the dimensions of the tracks cablaje imprimate and the distance between them, i.e. the insulation. For a multilayer printed circuit with a specific stack-up, it
adjacent substrate layers. The soldering mask soldermask is made 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 has a role of