| Electronics > Beginners |
| Is Broken top/bottom ground plane ok if you have a solid interior one? |
| (1/1) |
| 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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