Handling of connecting legs in large-area conductors In large-area grounding (electrical), the legs of commonly used components are connected to them. The handling of connecting legs needs to be comprehensively considered. It is better to have a full connection, but there are some bad hidden dangers in the welding assembly of components, such as: ● Welding requires a high-power heater. ● It is easy to cause virtual solder joints. Therefore, taking into account the electrical performance and process needs, a cross-shaped pad is made, which is called heat shield, commonly known as thermal pad. Sex is greatly reduced. The electrical (ground) leg of a multilayer board is treated the same way.