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PCB Stack up Symetric vs Asymetric

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hioyo

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May I know when we will say a Pcb stack up is symmetric.

what is the difference between symmetric and nonsymetric stack up
 

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Symmetry plane in the middle between top and bottom side. Symmetry means equal substrate thickness and copper weight in both halves, preferably also similar copper areas. Asymmetrical stack-ups are expected to cause PCB warping.
Symmetry plane in the middle between top and bottom side. Symmetry means equal substrate thickness and copper weight in both halves, preferably also similar copper areas. Asymmetrical stack-ups are expected to cause PCB warping.
 
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    hioyo

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