Copper shorts can be identified with testing. Make sure you define test requirements in your PCB design software.
For the best success when manufacturing your PCB design, you need the latest Gerber X2 file formats in the free Gerber file editor in your PCB design tools.
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Make sure your high voltage PCB design is safe and manufacturable with the complete set of design tools in Altium Designer.
You can make the transition from being a hobby PCB maker to a professional designer when you use the best PCB design tools in Altium Designer.