Electronics Forum | Wed Sep 05 08:10:45 EDT 2007 | davef
Questions are: * Do not judge the quality of a solder connection by the shineyness or color of the solder connection. Do you have smooth and unform flow, no pitting, and good wetting to the lead and the pad? * What is the temperature of the leads of
Electronics Forum | Fri Jul 08 04:09:59 EDT 2011 | leadthree
I hope to get some feedback here. I have a SMD connector that reflow-solders quite poorly (I guess solder paste or profile issue). On the X-ray I see strange bubbles, does it mean there are voids under pin? Generally I am not satisfied with the sol
Electronics Forum | Fri Jan 16 14:35:07 EST 2009 | realchunks
Had the same problem with boards from China. Try using Scotch Brite medium duty pad. It worked for us.
Electronics Forum | Thu Jan 22 09:59:18 EST 2009 | jeffcali
try making your boards in the USA. There's better QC, and if any problems do happen, they can be solved easily and quickly saving you money in the run. You get what you pay for. Good luck.
Electronics Forum | Tue Sep 11 08:00:46 EDT 2007 | hussman
HOW did you change the temp? Stay that course till you achieve the temp you need. Try slowing the conveyor as well.
Electronics Forum | Thu Sep 13 13:36:46 EDT 2007 | russ
switch pastes and see what happens, Kester had issues with their fluxes a little while ago and you may have gotten one of the bad batches. R
Electronics Forum | Mon Sep 17 01:43:05 EDT 2007 | mun4o
hi, finishing is lead free HAL, Tpeak=214-232*C in diferent profile, wich we made.
Electronics Forum | Fri Jan 16 15:34:56 EST 2009 | black5629
Thanks, we tried using some very fine sand paper and did improve. Any one know of any chemical that would work.
Electronics Forum | Wed Sep 05 07:07:25 EDT 2007 | mun4o
hi, I have a big problem with soldering uP QFP144 package.All components in PCB are small, only this chip is big and I can't make good temperature profile.Solder joints of other components are shining and with good wetting, but in QFP leads solder j
Electronics Forum | Thu Aug 28 11:15:05 EDT 2008 | omid_juve
I've been there. Soldering no lead parts in a > leaded world can be difficult. Sounds like you > are not wetting to your parts becasue you ar enot > getting hot enough. Here's the trick - you can > turn up your profile to look like a no-lead
