Electronics Forum | Wed Oct 27 09:39:54 EDT 2004 | loz
Hi all, been recently wave soldering some pcbs with no problems and have now noticed what looks like blue residues on some solder joints. We have been running this product for around six months and this is the first time we have seen this. It is rand
Electronics Forum | Thu Oct 28 11:41:21 EDT 2004 | Steve Stach
Hello Loz, Blue residues on circuit boards can be caused by copper corrosion, component body deterioration, marking permanently, and adhesive break down. In this case, a more subtle mechanism appears to be possible. This is a no clean application
Electronics Forum | Wed Oct 27 19:55:01 EDT 2004 | davef
We talked about a similar "Blue Haze ( Not the same as Purple Haze)" awhile ago http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=21401 The BIG difference is that yours is soluable.
Electronics Forum | Wed Mar 10 13:13:19 EST 2004 | davef
It's [maybe], because you melt [reflow] the itty, bitty solder pellets [that were formed from a liquid solder] in the solder paste. * Wave solder is melted solder bars [that were formed from a liquid solder], also, but someone named it wave soldering
Electronics Forum | Tue Oct 28 09:24:10 EST 2003 | davef
Running a soldered BGA through a wave solder pot is very risky: * 230-240*C temperature of the pot could damage the device. * Solder in the pot will certainly cause bridging between BGA solder balls. * Solder in the pot could melt BGA solder balls.
Electronics Forum | Mon Oct 23 21:18:14 EDT 2000 | Dave F
Unlike components where the solder paste has been reflow soldered, wave soldered components have an "infinite" amount of solder available to make a solder connection. If you have good solder flow, pad and component termination size are going to be b
Electronics Forum | Thu Jul 06 03:43:22 EDT 2017 | jamesbarnhart
Electronic devices required higher speed, I/O capability, and density to meet standard requirements. Automated robotic soldering solutions that meet the demands of applications are too challenging for hand soldering. Manual soldering, even with the m
Electronics Forum | Thu Jul 18 21:00:57 EDT 2002 | davef
Platitudes about soldering are: * People ARE NOT good at soldering. * Machines ARE good at soldering. You can purchase a good used wave soldering machine for $20k. * Training helps people to be better at soldering. * Your solder connections should
Electronics Forum | Mon Oct 01 16:55:27 EDT 2001 | davef
I agree. Poor soldering technique is the most straightward way of creating solder balls during hand soldering operations.
Electronics Forum | Fri Nov 10 16:09:18 EST 2006 | realchunks
When you say "Displacement Soldering" do you mean selective soldering? Also known as spot soldering?
