Electronics Forum | Fri Aug 01 23:43:52 EDT 2003 | Yngwie
Thanks Dave, the residue appeared to be similar to fungus. First, I thought it could come from water soluble flux but, our plant only runs no-clean. So, can I concluded that this greenish "fungus" looking staff is not initiated from high hot air temp
Electronics Forum | Sun Jun 27 06:27:15 EDT 1999 | Vic Lau
| I am looking for a way to clean solder off of QFP packages. I'm thinking a chemical method would be easy, as long as the chemistry doesn't attack the leads themselves, or the package. | Any suggestions? | Dear Matt, I have a customer, who is com
Electronics Forum | Mon Jun 28 14:36:34 EDT 1999 | John Thorup
| | I am looking for a way to clean solder off of QFP packages. I'm thinking a chemical method would be easy, as long as the chemistry doesn't attack the leads themselves, or the package. | | Any suggestions? | | | Dear Matt, | | I have a customer
Electronics Forum | Tue Jul 16 21:28:41 EDT 2002 | davef
Questions are: * What is this green material? * What does the green material look like? * What the impact of this material on the long-term reliability of your customer�s product? * What flux did you use to solder these boards? * How were the boards
Electronics Forum | Thu Jul 31 11:33:51 EDT 2003 | yngwie
I faced problem over connecter's pin that were hot air soldered. This connector has 168 pins ( similar to the straddle connector ). The process is to apply the flux onto the connector's J-leads, and the hot air pencil were then ran thru' the leads to
Electronics Forum | Thu Nov 16 11:45:15 EST 2006 | markb
I still think the best bet is probably an SMT pre-bake operation to ensure that there is no moisture in the board. Vapor pressure is usually the leading cause for delamination, so removing the source should significantly help out. Unfortuantely, pr
Electronics Forum | Mon Aug 09 20:47:21 EDT 2004 | KEN
I think OA flux left on the pot would quickly looses its activity and become part of the dross waste stream, and smoke stream for that matter. Also, if your wave is setup properly your selective pallets will scour (push) the top of the lambda wav
Electronics Forum | Mon Feb 20 09:20:07 EST 2006 | dpmilk
It appears to us that the problem lies in the lead-free solder paste rather than the inductors. We have not found a lead-free solder that does not do this. The green is on the copper wire. We believe it gets there during the reflow. The gasses fr
Electronics Forum | Tue Jul 29 21:28:43 EDT 2003 | Dean
Copper thieves...great idea...used some just today. How about some details on the wave soldering issues? I bet there are some mega-expert super brain-e-ax on here that would love to share their lifetime learned black art. Or maybe not (kidding).
Electronics Forum | Mon Oct 06 15:48:21 EDT 2003 | Adam
Please help, we have by mistake repaired some boards using the wrong flux (water soluble on a no clean board). Unfortunatly we found out later on while we are testing the boards. The lab anyalysis clearly showed that the flux has eaten through the