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Does IPC definition for "QFN Void Ration" ?

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Does IPC definition for "QFN Void Ration" ? Like IPC 7095 s... - Aug 10, 2014 by CMCHOUE  

there is no clear percentage for the total voiding, but I kn... - Aug 11, 2014 by Evtimov  

You mean that is void size or area can't cover via hole? ... - Aug 11, 2014 by CMCHOUE  

This is not desirable ... - Aug 12, 2014 by Evtimov  


CMCHOUE

#72549

Does IPC definition for "QFN Void Ration" ? | 10 August, 2014

Does IPC definition for "QFN Void Ration" ? Like IPC 7095 susgestion the BGA Void ratio.

reply »


Evtimov

#72550

Does IPC definition for | 11 August, 2014

there is no clear percentage for the total voiding, but I know that single voiding shouldn't cover two via holes(defect)

reply »


CMCHOUE

#72553

Does IPC definition for | 11 August, 2014

You mean that is void size or area can't cover via hole?

reply »


Evtimov

#72555

Does IPC definition for | 12 August, 2014

This is not desirable

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