Electric meter PCB usually adopts double-sided circuit board to meet the performance and functional requirements of the equipment. The surface treatment usually adopts lead-free tin spraying process. Double-sided PCB means that both sides of the circuit board have conductive patterns, which can effectively increase the connection density of the circuit and reduce the wiring length per unit area.
Lead-free tin spraying is a surface treatment process that usually forms a thin layer of tin on the pads and contact points of the PCB to improve welding performance and anti-oxidation ability. Lead-free tin spraying treatment can provide better electrical connection and longer service life.
Lead-free tin spraying surface can effectively prevent oxidation and wear, ensure the connection stability in long-term use, and is particularly suitable for high-frequency and high-speed applications.
The good conductivity and wettability of the metal pad make the welding process smoother, especially suitable for the welding of SMT (surface mount technology) components.
FR-4 material and immersion gold surface treatment can effectively reduce signal loss, improve the electrical performance of PCB, and are suitable for high-frequency applications.
Use PCB design software to complete the circuit diagram and layout to ensure that the double-sided circuit wiring is reasonable and the signal
Make FR-4 substrate according to the design file, clean and dry it, and prepare for subsequent processing.
Etch the substrate surface to form the required circuit pattern, and then cover it with a thick layer of copper to ensure conductivity.
Generate a gold layer on the pads and contact points through chemical deposition, complete the gold treatment, and ensure good conductivity and oxidation resistance in the welding area.
Conduct electrical tests and quality inspections to ensure that the PCB meets standard requirements before leaving the factory.
