Electronics Forum | Wed Sep 23 00:06:34 EDT 2020 | SMTA-64387098
I have modules that come with a 4 x 2 pin header. The problem is the pins must be oxidized as they do not take solder (no wetting occurring). This occurs whether solder in our wave soldering machine or soldered by hand. I tried cleaning the module i
Electronics Forum | Wed Sep 23 13:56:02 EDT 2020 | emeto
Try to pre-tin the part. This should give you a lot of answers.
Electronics Forum | Thu Sep 24 08:05:59 EDT 2020 | majdi4
In my opinion, it is not possible to eliminate the oxidation in a component because oxidation it is not removable .. the only solution is to apply a mechanical operation (scraping) and then tinning the part..
Electronics Forum | Thu Sep 24 12:59:59 EDT 2020 | davef
If whatever is preventing the leads on your component from wetting is oxidation, cleaning the component will not help. Consider trying a more active flux prior to soldering. Understand from your supplier the potential complications that may affect
Electronics Forum | Wed Aug 29 12:12:14 EDT 2018 | solderingpro
What type of flux are you using today? - Obviously you have already outlined the difference in the parent materials and parent material preparation, so using the same program/profile will not work; the characteristics are different. Try increasing p
Electronics Forum | Fri Jul 26 11:20:33 EDT 2013 | gnus
Hi all, I'm having issues placing 7 pin DPak packages. I'm using mechanical centering with four centering phases (one for each orientation). Tool used is A24S. Machine picks up the part but will reject it when centering the part. I have measured all
Electronics Forum | Tue Jan 13 10:25:29 EST 2004 | James
Do you have a different reel of parts. The leads could be oxidized from age. If everything else is soldering well, I would try that. Is your profile on your oven correct?
Electronics Forum | Sun Sep 28 17:14:53 EDT 2008 | ronsou
small pads like 0402 tend to get hot quite > easily. looks like excessive heat is your problem > here. pads are wetted, component leads are not. > this means solder paste flux on top layer was > exhausted before entering in reflow. your profile
Electronics Forum | Thu Aug 28 08:43:56 EDT 2008 | rgduval
You wouldn't think that placement would affect dewetting or solderability....I wouldn't have either, until it was the only thing left in our process, and when we changed it, things got better. I couldn't begin to explain why, either. The only concl
Electronics Forum | Tue Sep 02 15:29:36 EDT 2008 | bvdl
small pads like 0402 tend to get hot quite easily. looks like excessive heat is your problem here. pads are wetted, component leads are not. this means solder paste flux on top layer was exhausted before entering in reflow. your profile is the 'in-be
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