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August 2015

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Subject:
From:
Richard Krug <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Richard Krug <[log in to unmask]>
Date:
Mon, 31 Aug 2015 16:14:45 +0000
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I've got something I haven't seen before.  We wave soldered boards with Sn63Pb37 and found a "textured" surface after soldering.  
We seem to have good wetting, but it looks like we have "lumps"  under the solder surface.  The lumps are most visible where the solder is thin, but can also be found on thicker solder joints as well.  
The application is class 3.  We do monthly solder analysis on the pot so I don't think it is contamination in the solder.  
Any insights would be appreciated

I know the picture will be stripped out of the message, but I'm copying Steve Gregory directly in hopes he can post the picture.  

Steve - Please post this picture to go with my question for the TechNet forum.  Thanks in advance.  

Dick Krug, CSSBB, CSMTPE
Lead Process Engineer
Sparton Brooksville, LLC
30167 Power Line Road
Brooksville, FL  34602-8299
(352) 540-4012
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