Electronics Forum | Wed Mar 15 09:52:34 EST 2006 | vicknesh28
It does leave a saddle like appearance on the solder
Electronics Forum | Wed Feb 22 05:10:26 EST 2006 | bobpan
Maybe you should reject the rejecter???? Is that a double negative???
Electronics Forum | Wed Mar 15 09:42:17 EST 2006 | slthomas
Is the lead leaving a depression in the solder that wetted the pad or is there maybe just not enough solder to fill the gap?
Electronics Forum | Fri Mar 17 09:24:22 EST 2006 | russ
nothing appears to be out of line. Is this KOKI a no-clean or water soluble? You may want to try to hit 225 at the problem lead with a TAL of 70 sec. You may also want to remove the soak or at least shorten if you can. We were talking about a s
Electronics Forum | Wed Mar 15 00:44:39 EST 2006 | vicknesh28
Would i be able to judge how good is a reflow profile from the appearance of the flux residue? Often times i come across flux (not sure if residual) between a non-wet QFP lead and the reflowed solder paste on the pad (it's sandwiched between the bott
Electronics Forum | Wed Feb 22 04:07:04 EST 2006 | slaine
who rejected it? , sounds like an average leadfree solder joint. you could section it to help prove its good.
Electronics Forum | Wed Mar 15 08:52:46 EST 2006 | russ
Best way to judge how good a profile is by measuring it. It is not real accurate to determine by the amount of residue left. You should be able to tell if the lead is bent causing the open.
Electronics Forum | Wed Mar 15 09:01:11 EST 2006 | Vick
The lead was inspected for coplanarity and it's within the specification it's designed for and doesn't show any variation in terms of height as compared to it's adjacent lead that has good wetting
Electronics Forum | Wed Mar 15 09:21:40 EST 2006 | vicknesh28
Thanks for the input. Just one question. Is what i am seeing normal? I am refering to the flux being between the lead and molten paste after the reflow process. This only found on a non-wetting lead.
Electronics Forum | Wed Mar 15 11:19:43 EST 2006 | slthomas
Based on that criteria I would also guess profile but as has been stated, you don't really know w/o profiling.
.gif)