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Nonwetting 0603's

dbdavis

#25263

Nonwetting 0603's | 23 July, 2003

Dear Colleagues,

I'm am experiencing some problems with nonwetting of primarily 0603 packages. The problem is infrequent but occures just enough for my QA dept. to notice. My reflow profile seems to be correct and the vast majority of parts solder fine. I can find no commonality between failures.

The failure rate is less than .05%. Perhaps I'm making the problem bigger than it is.

Any thoughts?

Thank You for your time.

Brian

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MA/NY DDave

#25266

Nonwetting 0603's | 24 July, 2003

Hi,

If the failure rate is a lot higher than all the other components including ones similar to the 0603's than you won't be making a big deal. It is all relative.

My only thought is to run a DOE with 0603's from different manufacturers and see if the failure rate is consistent.

YiEngr, MA/NY DDave

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iman

#25271

Nonwetting 0603's | 25 July, 2003

does the "non wetting" occur on the component terminals or PCB pad area? It sort of helps to get a better understanding of the symptoms.

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