Maximum Via Stub Length

engr_joni_ee

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I am wondering about the topic Maximum Via Stub Length. I have heard about it but to be honest have not looked more in to that stuff. Is there a maximum length of the via stub that ensures no reflection and we are fine to have them and leave them without back drill ?
 

Unless you are designing PCB in the multi 10 GHz range, via stub is just a small parasitic capacitance. Haven't yet seen back drill in PCB up to 10 GHz.
 

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