Electronics Forum | Tue Apr 27 07:50:09 EDT 2021 | jeremy_leaf
@KWalker I think that could be the case. Though I read somewhere a while back that nickel oxidation can be quite tough to remove, even with flux. Am I wrong about that?
Electronics Forum | Tue Apr 27 19:08:04 EDT 2021 | emeto
Jerry, just out of curiosity, why can't you use flux? Flux is essential part of soldering and it is there for multiple reasons. Flux we can also clean afterwords - even No Clean.
Electronics Forum | Tue Apr 27 21:22:57 EDT 2021 | kwalker
The fact that your cleaning didn't really help reinforces that it probably is oxidation. Cleaning won't remove that.
Electronics Forum | Fri Jun 10 17:55:16 EDT 2022 | jdengler
Generally we overprint on the exposed part of these pads. When there isn't enough clearance at the end of the pad we place solder preforms with the placement machine. Jerry
Electronics Forum | Fri Jun 10 19:05:23 EDT 2022 | llawrence
Overprint, that is putting extra solder on with the stencil that is even further out from the pads, with the idea that it will suck that solder up during reflow? I could give that a try. Are there any general recommendations when overprinting? And wh
Electronics Forum | Fri Jun 10 23:24:02 EDT 2022 | llawrence
Ah okay, that should be pretty easy to do on the current board design. If overprinting doesn't work, then I might try a preform. I wasn't even aware that was a thing, I might be able to do some of our through-hole components that way if they are rate
Electronics Forum | Tue Mar 17 09:06:25 EST 1998 | Justin Medernach
| | Hi all, | I would like to have some information regarding the paste in holes process.We are the Backplane manufacturing and dealing with lots of thick PCB and would like to change the processes from wave to paste in hole.Any feed back of info
Electronics Forum | Mon Dec 04 11:46:41 EST 2006 | samir
SMTNetters, I have a product coming down the pipeline that we'd like to make pure double sided reflow, it'll be RoHS product, and the hope is... we'll be able to solder the thru-hole stuff by screen printing solder paste and reflow soldering. Anybo
Electronics Forum | Mon Mar 12 11:27:35 EDT 2007 | coop
I am not using a solder pallet, I don't think the problem is contamination related, because these parts are on some of our other assemblies, and they're being waved with no problems. The problem seems to be mainly on our panelized boards for some rea
Electronics Forum | Mon Jan 17 17:38:29 EST 2011 | bandjwet
All: I am reaching out to get some suggestions on the right flux to use as well as a recommended cleaning process for soldering a KOVAR RF shield using 80/20 Au/Sn solder to a ceramic hybrid. The recommended profile is 4-5 min at 280C and at least