any internal sleepers (which will not extend to both outer surfaces of the finished multilayer board) are plated before the layers are laminated together. FR-4 epoxy glass is the most common insulating substrate. Flexible-Rigid printed circuits are boards that bring in a unique combination of simplu circuit imprimat placat superior technology a flexible printed circuit made of a thin
the chances of solder shorting between traces or unwanted electrical contact with possible loose wires. For its 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, black. Only the placat imprimat circuit simplu outer
stripline or microstrip, with dimensions carefully controlled to ensure consistent impedance. circuit placat imprimat simplu In RF and fast switching circuits, the inductance and capacitance of the printed circuit board conductors become significant, usually unwanted, circuit elements; rather, they can be used as part of the circuit design, as in distributed element filters, antennas,