What is the Function of PCB Pad

The application of PCB in today's electronic products can be seen everywhere, and there are different shaped pads on the PCB. As the basic unit of PCB mounting, what is the role of the pad?

The PCB pad refers to the lead hole on the PCB board and the surrounding copper foil of various shapes. The types of pads are different, the common ones are square pads, round pads, oval pads, etc., and some special pads, such as teardrop pads, cross pads, and plum pads.

Take the teardrop pad as an example. It looks like a drop of water. It is generally used when the electronic components on the PCB are relatively small. If it is directly connected to the circuit on the PCB board, it will be more difficult, and even if the connection is successful, as long as the PCB board is slightly impacted in the future, it will cause the original connection to loosen or even fall off directly. To prevent this from happening, the teardrop pad was invented.

Whether it is a soft board and a hard board, or a combination of soft and hard boards, as long as electronic components are to be mounted, pads need to be used. Although the types of PCB pads are different, their functions are the same. The first is to realize the electrical connection of electronic components in the circuit; The second is to enable the external electronic components to be better connected with the PCB circuit board to prevent falling off.

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