Hi Mike,
As you indicate, the prime issue with "solder tails"  is the potential for shorts.
The cause of the problem is that the solder is solidifying or cooling prematurely.
There are a
number of  reasons this can happen;  solder temp too low,  insufficient dwell time, and
excessive copper
concentrations to name a few. If your certain that the tails are short enough to not
create a problem,
welll...who knows better than you?  But, be careful, where there is smoke...etc.
Mark

"Leonovich, Mike E." wrote:

> Hi,
>
> I've been trying to determine IPC specs for a particular Hot Air Solder
> Leveling "defect".  Below is a electronic photo of the defect.
>
>  <<...OLE_Obj...>>
>
> This "defect" is called a solder tail, and I'm trying to determine when it's
> actually a defect and why.
>
> I know that if the "tail" stretches and contacts another annular ring, then
> it's defective because of bridge or short.
>
> If the surface plane of the annular ring is compromised by the excessive
> solder at the base of the tail, then it's defective because the annular ring
> needs to have a smooth even surface for the assembly of the surface mount.
>
> Other than these issues, is there any other reason why this "tail" would be
> defective?  If the presence of the tail doesn't create an uneven surface for
> the annular ring, and if the tail doesn't contact any other features it
> should be acceptable, right?
>
> I appreciate whatever help you could give me.
>
> Thanks.
>
> Mike.
>
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