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PCB Design Rules

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Initially PCBs were designed manually by creating a photomask on a clear mylar sheet, usually at two or four times the true size. Starting from the schematic diagram the component pin pads were laid out on the mylar and then traces were routed to connect the pads. If you have many questions of PCB Design, please come here!

Community > Groups > PCB Design Rules > Oval holes in PCB
Oval holes in PCB
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I'm revising a circuit board design to be manufactured, and I'd like to include oval holes. I've never used them before, and want to use them because they would save space compared to a regular circular hole. The application is for a zip-tie to pass through the circuit board to secure wires.
Statement: This post is only the personal view of the author and does not represent the opinions of

Robert Jason

You can create a row of 1mm holes very close together and break them out with a file.


A slot would need to be milled. A hole can be drilled faster. It may add cost unless they are already milling other parts of the board. Slots would be better for tie wraps anyway. No need for any plating.


The software I used is eagle cad. In the board outline layer draw a line where you want the slot. Or draw a rectangle.

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