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What is the min trace width and space of heavy copper PCB?

New PCB designer always confuse how to build the min trace width and space for heavy copper PCB. Now PCB manufacturer engineer tell you how to do?

 The min. trace width/space at inner layer :

pcb-trace-width-and-space

thermal-pad

The min. trace width/space at outer layer:

pcb-trace-width-and-space-2

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