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Is it correct to route connections under the component?

Schulz Jordan

I am routing the traces under the connector, is it a correct way to route or should I use beneath layers to get the connections out. I am attaching image for reference.

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  • 0

    Hi Jordan. The answer to your question is dependent upon at least a couple things. If the library part for your connector has been done properly, it will already contain any 'Route Keepout' regions to deal with any exposed metal on the bottom face of the connector that could come in contact with traces and ensure they are not placed in these regions. If this isn't a concern, then it comes down to what signals are involved.

    Are they high speed? If so, hopefully you have a GND on the adjacent layer to minimize the loop area of the entire signal path (including return path). If your closest GND or return path is a few layers away, you may want to run the signals on an adjacent signal layer to minimize the entire signal loop area.

    Are the signals high impedance and susceptible to noise? If so, then you may want to place them on inner layers to try and shield them between ground layers.

    As you can see there are many details that should help drive your decision on what layer to use.

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  • 0

    Hi Jordan. The answer to your question is dependent upon at least a couple things. If the library part for your connector has been done properly, it will already contain any 'Route Keepout' regions to deal with any exposed metal on the bottom face of the connector that could come in contact with traces and ensure they are not placed in these regions. If this isn't a concern, then it comes down to what signals are involved.

    Are they high speed? If so, hopefully you have a GND on the adjacent layer to minimize the loop area of the entire signal path (including return path). If your closest GND or return path is a few layers away, you may want to run the signals on an adjacent signal layer to minimize the entire signal loop area.

    Are the signals high impedance and susceptible to noise? If so, then you may want to place them on inner layers to try and shield them between ground layers.

    As you can see there are many details that should help drive your decision on what layer to use.

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