Electronics > Projects, Designs, and Technical Stuff
1.6mm versus 0.8mm PCB from an EMC perspective
Simon:
I am designing a filter. This means that given the simplicity in the layout with most components sitting between two rail simply making each rail a plane on either side of the board joins all parts together with low impedance connections. The pairing of the layers so will also aid in reducing emissions. But something obvious to wonder about is how much effect dose the distance between the planes make. Would halving it really make much difference?
Simon:
I will probably get 0.8mm if I can but there are other considerations like what copper thickness they offer on 0.8mm and the mechanical rigidity that can screw you with larger package ceramics which is this case I can only put near an edge.
Most boards are as standard one layer either side rather than on one side in 4 layer style.
SiliconWizard:
Unless you have ultra-specific requirements (which you may have, we don't know any detail about your circuit), integration and mechanical rigidity are the main decision factors for board thickness IMO. If impedances are a stringent concern, just calculate them according to layer spacing whatever thickness you choose.
blueskull made a very good point: absolutely not all 4-layer stackups for a given board thickness are the same, so check that as well. If that really matters in your application.
Simon:
Well I am doing 2 layer so they will be opposite sides of the PCB. I will be potting the PCB so it just has to be stiff enough for assembly.
SiliconWizard:
--- Quote from: Simon on March 30, 2020, 04:04:04 pm ---Well I am doing 2 layer so they will be opposite sides of the PCB. I will be potting the PCB so it just has to be stiff enough for assembly.
--- End quote ---
Is there any ground plane on either side?
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