What is Circuit Design
Circuit Designers try to make connections.
6. Putting it all Together
6.1. Electrical and Thermal Conductivity of Solder
Materials that conduct electricity well, often conduct heat well. Of the common PCB materials, Copper offers the best compromise between price, conductivity, and manufacturability -- and it happens to be the second-best electrical and thermal conductor available to PCB manufacturers. Copper has a greater conductivity than aluminum and even gold.
This graph shows the relationship between thermal and electrical conductivity for common PCB metals.
Copper is used on PCBs to simultaneously conduct electricity and heat.