Electronics Forum | Tue May 26 06:56:40 EDT 2009 | xinxi
Hi! From your post, it seem like the wave did not really touch the component. You probably need to get the both wave height correct and that it hits the component.It is normal for solder to come through the PCB when using chip wave. The through-hole
Electronics Forum | Tue Aug 18 02:10:14 EDT 2009 | sergey2007
Hello, I have a customer who recentely installed a vapor phase soldering system. Everything goes pretty well, but from time to time the customer has the same problem with the soldering: one of the components on PCB (usually, it's a QFP package) is ro
Electronics Forum | Wed Aug 26 18:58:07 EDT 2009 | rossi
I am not sure that it is the pillow problem. With the pillow problem you tend to see residual solder on the pad and voids where this solder pulled from on the ball. What we are seeing is a very thin flat layer of solder on the pad and a flat surface
Electronics Forum | Thu Oct 01 16:56:40 EDT 2009 | gplume
Does anyone out there have experience soldering with Pb solder (Sn 63 or Sn 62) to SAC 305 coated PCB lands (about 50um) or Sn-Cu plated lands (about 10um). I know soldering Pb free (Sac based soler) to Pb/Sn coated lands is a no-no, but was waonderi
Electronics Forum | Sat Nov 21 12:28:00 EST 2009 | flipit
There is evidence of lead being used in soldering 5000 years ago in Mesopotamia. Not a big issue for most people doing SMT but the poster should also understand why percent metal is adjusted for different solder paste alloys. You print by volume b
Electronics Forum | Wed Mar 03 23:07:59 EST 2010 | davef
If your "engineer reviewed the reflow profile and said this was not related to reflow conditions," then what does he think it's related to? We think that a increased effort to improve the thermal recipe to solder this part is required, because: * S
Electronics Forum | Fri Mar 05 02:59:59 EST 2010 | grahamcooper22
Hi, Do you have a picture on one of these leads where the solder has covered the lead ? As this is a gull wing device I wouldn't expect solder to cover it. I expect to see a toe fillet / wetting around the sides of the lead and a heel fillet. If your
Electronics Forum | Fri Sep 17 03:03:29 EDT 2010 | grahamcooper22
Hi Gani, looking at the HASL icture and the poor wetting of the solder over the pads I would imagine that the HASL coating is very thin on the pads and in actual fact isn't 'solder' but is tin /copper intemetallic and this has poor solderability. It
Electronics Forum | Mon Nov 01 13:43:18 EDT 2010 | jmatty35
I have a question regarding mixing different manufacturers solder pastes. We have a board being built by a CM that we are bringing in house and soldering a final cover onto the PCB. The contract manufacturer is using solder paste A. We want to use
Electronics Forum | Mon Jan 24 06:19:04 EST 2011 | fönsi
Hello! I've had the same problem about one Jear ago. We had exessive building of voids in the solder joints. I recomment to take a pincer to break off some of the components. If the solder joint is good, the copper pad will stay at the solder joint
