What is the smallest a via could be for BGA?

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I am designing a BGA placement and need to get the via's out... - Mar 23, 2011 by rem

The minimum via hole size used will have a significant effec... - Mar 29, 2011 by davef

rem

#64002

What is the smallest a via could be for BGA? | 23 March, 2011

I am designing a BGA placement and need to get the via's out away from the part. What is the smallest via diameter I could use?

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davef

#64052

What is the smallest a via could be for BGA? | 29 March, 2011

The minimum via hole size used will have a significant effect on the cost of the board as it limits the number of PCBs that can be drilled as a stack. Not withstanding the radio performance implications of small diameter via holes, typical minimum sizes of 0.25 mm are commonly used. A reduced cost will be achieved if the minimum hole diameter of 0.5 mm can be used. Quoted from: http://www.plextek.com/papers/gspcbdes.pdf

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