and reduces the chances of solder shorting between traces or unwanted electrical contact with possible loose wires. For its circuit imprimat cu controlata impedanta function of helping to prevent solder shorts, the coating is called a solder mask. Soldermask is generally green in color but can have different colors: green, red, blue, white,
acting on the dimensions of the tracks and the distance between them, i.e. the insulation. For a multilayer printed circuit with a specific stack-up, it controlata circuit imprimat cu impedanta must be taken into account that the internal tracks with controlled impedance are shielded by copper planes and for this reason only the thickness of the insulation
paths. In a multi-layer board, an internal layer may be mostly solid copper to act as a ground plane for shielding and power return. For microwave printed circuits, transmission lines can be laid out in a planar form, imprimat impedanta cu controlata circuit such as stripline or microstrip, with dimensions carefully controlled