9 Points of Attention for Copper Coating in Ailey

The so-called copper coating is to use the unused space on the PCB as the reference surface, and then fill it with solid copper, which is also called copper filling. The significance of copper coating is to reduce the ground line impedance, improve the anti-interference ability, reduce the voltage drop, improve the power supply efficiency, and connect with the ground wire to reduce the loop area.

If the PCB has more ground, there are SGND, AGND, GND, etc, depending on the position of the PCB surface, the main "ground" is used as the reference to separate the copper, and the digital ground and the analog ground are separated. Copper is not enough to say, at the same time, before the copper coating, first increase the corresponding power connection: 5.0V, 3.3V, etc, thus forming a variety of different shapes of multi-deformation structure.

For a single point connection in different places, the method is to have a high resistivity and magnetic permeability through a 0 ohm resistor bead. It is equivalent to a series connection of a resistor and an inductor, but both the resistance value and the inductance are value vary with frequency.