Heavy copper PCBs

Heavy copper PCBs are a special type of printed circuit board (PCB). Their core characteristic is that the thickness of the copper foil in the circuit layers is much greater than in ordinary PCBs. Typically, the copper layer thickness reaches 70μm (approximately 2oz) or more, and can even reach 500μm (15oz), while the copper foil thickness in ordinary PCBs is generally 18-35μm (1-2oz). The manufacturing process of heavy copper PCBs is more complex than that of ordinary PCBs, requiring strict quality control.

Heavy copper PCBs improve performance by increasing the thickness of the copper layer and are primarily used in high-power applications. When space is limited and widening traces cannot handle high currents, Heavy copper PCBs are necessary. The thicker copper layer allows them to carry large currents (tens to hundreds of amperes) while efficiently conducting current and dissipating heat to prevent overheating.

Their structure can be divided into “overall thick copper” (the entire copper layer is thicker) and “partial thick copper” (only specific traces are thickened) to balance performance and cost.

This design is particularly suitable for applications requiring high current-carrying capacity, efficient heat dissipation, or high mechanical strength, such as charging piles and motor controllers for new energy vehicles, as well as high-power electronic systems, including industrial power supplies and automotive equipment.

To support this important sector, we have established long-term partnerships with several rigorously selected factories to provide you with thick copper PCB solutions that offer high current-carrying capacity, efficient heat dissipation, and strong long-term stability.

If you need further information or assistance, please get in touch with us, and we will be happy to help.

Our technical capability for Heavy copper PCBs

The table below shows some of our basic process capability parameters. If you don’t find the information you need in the table, please get in touch with us, and we will be happy to help you resolve your issue. In addition, other pages also have information about board materials and other types of circuit boards, which can help you make design or production decisions.

Heavy Copper PCB Manufacturing Capabilities
Item Base Copper Capability
Inner Layer Track / Gap 1/2 OZ 2/2 mil
1 OZ 4/4 mil
2 OZ 5/6 mil
3 OZ 7/9 mil
4 OZ 8/12 mil
5 OZ 10/15 mil
6 OZ 12/18 mil
8 OZ 15/21 mil
10 OZ 18/24 mil
12 OZ 20/28 mil
Outer layer Track / Gap 1/3 OZ 2/2 mil
1/2 OZ 4/4 mil
1 OZ 5/5 mil
2 OZ 6/8 mil
3 OZ 7/10 mil
4 OZ 8/13 mil
5 OZ 10/16 mil
6 OZ 12/18 mil
8 OZ 15/21 mil
10 OZ 18/24 mil
12 OZ 20/28 mil
15 OZ 24/32 mil