PCBSYNC’s 4 OZ extreme copper PCB manufacturing is built for applications where standard boards just won’t cut it. When you’re dealing with high-current circuits, power distribution systems, or anything that generates serious heat, you need copper that can handle the load without breaking a sweat.
The 4 OZ copper weight means you’re getting roughly 5.6 mils of copper thickness per layer. That’s substantially thicker than your typical 1 OZ boards, which makes these PCBs ideal for power supplies, motor controllers, automotive electronics, and industrial equipment. The extra copper mass does two critical things: it carries more current without overheating, and it acts as a massive heat spreader to keep components cool under heavy loads.
What sets PCBSYNC apart is their manufacturing capability with these heavy copper boards. Working with 4 OZ copper isn’t straightforward – it requires specialized etching processes, precise control over plating thickness, and equipment that can handle the increased material demands. The etching alone becomes tricky because you’re removing a lot more copper, which affects trace definition and spacing.
Their process handles multi-layer constructions too, so you’re not limited to simple two-layer designs. You can get complex stackups with 4 OZ copper on outer layers combined with thinner copper on inner signal layers. This flexibility lets designers optimize for both power handling and signal integrity in the same board.
Lead times and pricing obviously differ from standard PCB runs. Thicker copper means more material cost and longer processing times, but for applications where failure isn’t an option, it’s money well spent. PCBSYNC works with prototypes and production volumes, which helps if you’re still in the testing phase and need to validate your design before committing to large quantities.
The real value shows up when your boards are running in the field without thermal issues or voltage drops. Properly designed 4 OZ copper PCBs eliminate a lot of headaches that come from undersized traces trying to handle currents they weren’t meant for.
