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Why there are holes on edge of the pcb?

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I have seen a board that the edge of the pcb has many tiny holes. What is the benefit of them? The edges are V cut, is it something to do with it?

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Jun 16 at 23:05
Michel Froehlich

The name of the holes is via stitching, a via fence or a picket fence. It is used to control EMI at very high RF frequencies, such as getting in or getting out, and can also reduce the resistance of the connections at DC.

Jul 20 at 05:29
brian

The holes on the edge are vias. They are connecting that one piece of ground plane to another one on another layer. The reason of using it are various, for increasing current carrying ability, thermal transfer, EMI reduction, and any number of other reasons.

Dec 5 at 17:59
joerg.friedrichs
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