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Is ground plane required on top and bottom layers?

brs , 04-23-2020, 03:34 AM
Hi all,

I wonder is ground plane really required for free spaces around board on top and bottom layers for multi layer boards (4 layers and more)? Normally I have seperate internal gnd layers. What are your thoughts?

Thank you.
robertferanec , 04-23-2020, 11:44 AM
I do not pour GND into empty spaces between tracks and I have never seen any problems with that.

PS: Actually some time ago I read an article, that improper GND pour between tracks can make it worse (especially for EMC and EMI) and I think it can be truth.
brs , 04-23-2020, 01:20 PM
Actually I meant space around circuits, edges of the board, not between tracks. I see that most people pour gnd into all the spaces as a general behavior.
robertferanec , 04-24-2020, 05:28 AM
I see that most people pour gnd into all the spaces as a general behavior.
- that is what I meant ... pouring gnd into all spaces
xddarko , 05-04-2020, 02:28 AM
Hi,

I personally check the "Remove dead copper" icon in Altium to remove any copper which does not connect to GND or a power plane.
Also avoid copper between tracks.

Hope it helps.
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