Electronics Forum | Sat Jul 05 07:30:04 EDT 2003 | AlCapone
If the problem as you described as the gold plating contaminated, and the Nickel layer exposed to the solder pot. However, the purpose of the gold layer is to protect the nickel and copper layer not turn into corrosion and resist to other issue (humi
Electronics Forum | Wed Aug 20 11:21:30 EDT 2003 | Stan Stacy
Our old roof mounted air conditioners are currently not working. We are having some very humid weather right now which has been giving us some solder paste contamination problems. My Surface Mount line is in one room, (approx. 19,000 sq. ft.) along w
Electronics Forum | Thu May 06 10:21:09 EDT 2004 | Rob
Let me pose this scenario and ask your opinion. My manufacturing plant is located in New Orleans. Since summer is close upon us, the humidity in my SMT room where the machines and components reside get around 30-50%RH. I've got this Siemens waffle ch
Electronics Forum | Wed Jun 30 10:24:27 EDT 2004 | K
We find keeping the work environment at about 22degC and humidity to about 40-50% is the best way to control the solder balls. Before we took measures we were out of control with solder balls especially in the summer months. We run aqueous solder thr
Electronics Forum | Thu Aug 10 10:00:40 EDT 2006 | slthomas
Temp. and humidity levels are dependant upon your chemical (paste and adhesive) specifications. Ballpark I'd say 70�F and 40%-45% RH are good targets, as our paste spec. says optimal ranges are 70-77� and 30-70 RH. As far as air quality, if you bui
Electronics Forum | Thu Mar 08 22:35:13 EST 2007 | davef
Suggestions are: * Procure solderable finishes that have sufficient thickness to avoid intermetallic problems and use storage conditions that do not promote oxide growth problems. * Bagging/sealing boards has been shown to extend storage durations i
Electronics Forum | Wed Dec 08 09:53:23 EST 2010 | fönsi
Hello Because of the cold weather, we had some troubles with drying out of printed solder paste on the pcb's. The relative humidity in the air declined below of 20%. We have a process window of store the printed board for maximum 24 hours, but with
Electronics Forum | Mon Oct 30 12:07:42 EDT 2017 | slthomas
One thing that most of the sites I've worked in did NOT have was a room dedicated to SMT and the result is almost always a potentially dirty environment, even if you try hard to keep it clean. The one place I worked where they built a room specific
Electronics Forum | Thu Jun 27 06:22:30 EDT 2019 | robl
OSP is water based so guessing more involved is evaporation and dilution from humidity. From memory this may have been something to do with loosely bound electrons to the nitrogen atoms that could be easily freed up compromising the coating, but I
Electronics Forum | Tue Dec 05 15:10:55 EST 2000 | Francois Monette
Victor, here are a few more elements of information to answer your question. Both the temperature and relative humidity on the manufacturing floor have a significant impact relative to the rate of diffusion of moisture inside a plastic package and t
