plane for shielding and power return. For microwave printed circuits, transmission lines can be laid out in a planar form, such as stripline or microstrip, with dimensions carefully controlled to ensure consistent impedance. In RF and fast switching circuits, the inductance and capacitance of the printed circuit board conductors become significant, soldermask usually unwanted, circuit
Graphics and text on a circuit board's PCB are usually printed with a non-conductive permanent epoxy ink. The color is usually soldermask white, although other colors are available: yellow, black, blue, red. Screen printing is used to render useful information on the PCB board that can help users during assembly. It is used to
the outer layers by gluing. provides reliable electrical connections between the component terminals in a controlled manner according to a predetermined scheme. Printed circuits are widely used in many fields: Consumer goods Military Aerospace Industrial Medical Naval soldermask The unprecedented development in recent years of all fields of activity has led to a revolution in the