Electronics Forum | Tue Apr 15 06:10:54 EDT 2008 | aj
Try a new batch of Components ? We had a similar problem a while back - it was down to the component. aj...
Electronics Forum | Fri Apr 18 14:44:56 EDT 2008 | jax
Saunders Technology... or ECD (makers of M.O.L.E.) has what is called a TEMPROBE that will work how you want... even in "wet" solder paste. Maybe others here can tell you if it works well or not, I use KIC. www.ECD.com/saunders/tp.htm
Electronics Forum | Wed Apr 23 03:19:30 EDT 2008 | jkhiew
Hi all, Can anyone advise me what is the recommended floor life for pcb assembly prior to wave soldering before drying/degassing ? Thks Joseph
Electronics Forum | Wed Apr 23 17:28:46 EDT 2008 | davef
The need to prebake boards to remove moisture from the board [to prevent voiding] prior to wave soldering is driven by the thickness of through hole plating. * 1 thou [25um] or greater requires no prebaking * LT 1 thou [25um] requires prebaking
Electronics Forum | Fri Apr 25 13:30:45 EDT 2008 | flipit
I use Namics 8437-2 for micro BGA and flip chips. Will work for QFN or MLF after soldering. Flows well under gaps as thin as 0.001". Cure in 5-10 min at 150 C. Rock solid product. Is bit expensive. Is from Japan.
Electronics Forum | Fri May 02 11:36:21 EDT 2008 | fsw
I am of the same opinion! I don't think customer has clear idea of the underfill requirement. From our talks with them, it seems they feel that since the build is RoHS compliant, they feel more comfortable having an underfill on that component to cov
Electronics Forum | Thu May 01 21:17:38 EDT 2008 | davef
The concern about lead contamination of lead-free solder has to with zone refining. For more, look here: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=30315
Electronics Forum | Thu May 01 11:56:04 EDT 2008 | realchunks
It sounds like this part is floating on your solder joint during reflow. You may need to redesign your pad geometry. In general with this type of clip - smaller pads are better. If you cannotcahnge pad size, try changing the openings on your stenc
Electronics Forum | Thu May 08 15:41:07 EDT 2008 | shrek
I once took a pair of binoculars and stared at a wave solder for over an hour.
Electronics Forum | Mon May 12 15:19:54 EDT 2008 | guyramsey
Did any of you guys read the article from Rockwell Collins? http://www.smtnet.com/library/files/upload/The_impact_of_reflowing_a_pbfree_solder_alloy.pdf