Electronics > Beginners
Is Broken top/bottom ground plane ok if you have a solid interior one?
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JustMeHere:
I'm working on a 4 layer board. The stackup is top signal, 2nd gnd, 3rd +3v3, and bottom is signal.
If I did a full copper pour on the top and bottom layers, will I need to worry creating loop area problems? It doesn't seem like it should as long as I keep my 2nd layer as solid as possible (i.e. vias/pin holes only) I'm trying to get better cooling for my power and main processor.
OwO:
It is fine as long as you stitch the top and bottom ground pour to the real ground plane with a via every centimeter or so. Otherwise it's possible to get resonances depending on the shape of the ground pour.
T3sl4co1l:
I normally don't worry about outside ground fill at all, if there's inner planes. :)
I only do that when heatsinking or current capacity is required, or -- more as superstition than proven benefit, mind -- where high precision or high frequency circuits are used.
Tim
JustMeHere:
--- Quote ---I only do that when heatsinking
--- End quote ---
Heat sinking is specifically my goal. I'm trying to cool an ESP32 and a LT3509 power supply.
Thanks
JustMeHere:
--- Quote from: OwO on March 25, 2019, 08:08:52 am ---It is fine as long as you stitch the top and bottom ground pour to the real ground plane with a via every centimeter or so. Otherwise it's possible to get resonances depending on the shape of the ground pour.
--- End quote ---
Excellent answer. Thanks
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