Clarification on "aspect ratio" in pcb design

[M sakthi S]

Where the word "Aspect ratio" used in pcb designs?

 

[pritee]

Re: Clarification on "aspect ratio" in pcb design

aspect ratio is concerned of The ratio of the circuit board thickness to the smallest hole diameter.

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Minimizing the aspect ratio of the holes improves through hole plating quality and minimizes the chance of via failures

 

[kabaleevisu]

hi,
thanks for valuable answer.for example for below i mention same aspect ratio let me know which one is best

if the board thickness is 1.6mm and Min.drill size 0.8mm that aspect ratio is 2:1
like that 8:1 as well as 10:1 which one is the best
for manufacturing what is the standard for aspect ratio or minimum aspect ratio for manufacturing PCB ??

 

[ballimo]

there is no minimum for aspect ratio, the question is what the maximum aspect ratio a fabrication house can achieve; in other word what will be the minimum drill size for a give PCB thickness..
one of the fabrication house capabilities is the maximum aspect ratio they can achieve: per example some of them can achieve 15:1 aspect ration