Electronics Forum | Thu Sep 27 23:24:22 EDT 2007 | mika
Fe2+(aq) + 2e- "harply, but this is of no consequence since OH- ions are always present, even in pure water.) The cations then react with the OH- or even the H+ ions and dissolved oxygen to form a variety of compounds, which constitute rust: Fe2+(aq
Electronics Forum | Tue Feb 25 12:15:42 EST 2020 | dwl
Are you running a no clean process, or are you washing your PCBs? One caveat with ENIG is sometimes washing with hot DI water can effect solderability later on. I would also talk to your solder technicians and see what their preference is. Some pr
Electronics Forum | Mon May 06 11:45:32 EDT 2019 | slthomas
There are quite a few papers out there on the subject. Just enter "SMT void reduction" into google or other search engine and take your pick. That said, slow ramp rates and paste volume reduction are a good place to start. Although I haven't tried i
Electronics Forum | Sun Dec 10 20:17:51 EST 2017 | myke03o
Hi Dave, thanks for the response. * Improve your products that are used for thermal cycling testing of products of other companies? Yes we want to improve our products to pass thermal cycling and prolong the lifespan of the baord. * Change your pr
Electronics Forum | Thu Feb 27 16:23:37 EST 2020 | dwl
http://www.circuitnet.com/news/uploads/3/Comparing-Soldering-Results-of-ENIG-and-EPIG-Post-Steam-Exposure.pdf Years ago, I battled this problem. ENIG PCBs reflowed with active WS flux. We built one side, and then washed them because they were going
Electronics Forum | Wed Nov 17 11:20:23 EST 1999 | Dave F
Hey Gyver: If you don�t mind (which you don�t have any choice about, because I�m going to do it anyhow, cause it�s MY word processor), I�m going to respond genericly, but still be directed to your question. Much of the following is paraphrased from
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 | Fri May 03 16:06:44 EDT 2013 | hegemon
To be short, no change in profile is going to get you through this. As I recall the point of hard gold is to retard the wetting process, so no surprise here. For example a connector might have hard gold plating at the mating surface, but not at t
Electronics Forum | Thu Sep 16 20:55:35 EDT 1999 | Dave F
| | We have some SMT components with gold plated leads. They're actually LCC led packages. A good solder alloy to use would be Indium / Lead to reduce tin dissolution into the gold and avoid the resultant brittle intermetallic compound. However, a re
Electronics Forum | Thu Sep 16 18:07:16 EDT 1999 | Earl Moon
| We have some SMT components with gold plated leads. They're actually LCC led packages. A good solder alloy to use would be Indium / Lead to reduce tin dissolution into the gold and avoid the resultant brittle intermetallic compound. However, a reco
