Standard Copper PCB vs. Heavy Copper / Thick Copper PCB(Heavy Copper PCB)
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| Feature | Heavy Copper / Thick Copper PCB (2–12 oz) | Standard Copper PCB (≈ 1 oz) |
| Typical Role | High-current power conversion and power distribution | Signal, control and low/medium-power rails |
| Copper Thickness per Layer | 2–12 oz on selected layers or local regions | 0.5–1 oz |
| Current & Temperature Rise | Designed from current density and allowable ΔT | Limited before overheating |
| Thermal Behavior | Copper itself is key heat-spreading and conduction structure | Relies heavily on external heatsinks and vias |
| Terminal / Connector Robustness | Thick copper, reinforced pads and via structures at connection points | Standard pads and vias |
| System Architecture | Can integrate busbar / cable / shunt functions into the PCB | Often needs extra busbars, cables and shunts |
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