All of us know the printed circuit board, but do you know what is the heavy copper PCB? Best Tech is a very experienced heavy copper PCB fabricator since year 2006. Heavy Copper PCB is a type of printed circuit board that features with thicker copper layers than standard FR4 PCBs. While conventional PCBs typically have copper thicknesses ranging from 1 to 3 ounces (per square foot), heavy copper PCBs have copper thicknesses exceeding 3 ounces and can go up to 20 or more ounces. These copper layers are typically found in the inner and outer layers of the PCB, heavy copper providing enhanced current-carrying capacity and improved heat dissipation capabilities.