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Latent shorts on QFN package Reply 2017-02-28 18:45:31
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Jorge Arizaga

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I'm having shorts appear on my QFN packages between pins, usually only after a week or so of power-on operation. The shorts are 1K and slowly down to hard shorts over time. Typically a defective part will have failures on multiple pins. I tried having my assembly house switch to a "no-clean" process, however it hasn't eliminated the problem. I'm using Lead-free solder.
Does this problem seem familiar to anyone? I need minimally a test to tell me whether any given assembly is defective, and ideally a defect-free assembly method.
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Statement: This post is only the personal view of the author and does not represent the opinions of ALLPCB.com.

ErikLee

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This post is perfect for what I need. Thanks!

branko.j.kovac

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Useful!

francois.jacob.hello

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I am going to keep checking for new writings.

ilmandorlone

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What you share on your post is quite useful.
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