Electronics Forum | Fri Aug 10 13:09:49 EDT 2001 | Hussman
Hey Wister, Assuming you are talking about BGA voids, and you just want to try and optimize your profile, you could try a "straight ramp profie". This is where the soak temp is constantly being elivated until you hit reflow. I find this helped me
Electronics Forum | Mon Oct 18 11:01:26 EDT 2004 | DenisM
I have had similar problems and my customers have had this too. A two story drop test was made by one of my customers and they found that changing Sn63 solder to Sn62 solder made a significant impact. There is no real downside other than a slightly
Electronics Forum | Thu Mar 24 19:17:43 EST 2005 | EA
Hi, We are running the automotive product and question was throw to us how do we ensure that our solder joint are good enough after reflow.....and during the sealant process, there's a bit of bend on the nozzle and it toughes the component and custo
Electronics Forum | Thu May 18 14:30:33 EDT 2006 | Chunks
Hi Mark, I feel like a broken record since I keep replying to this thread. BUT, I remembered a large lytic cap that we had a couple years ago, doing the same thing. The base of the cap would expand in reflow and the bottom would bulge out and only
Electronics Forum | Thu May 18 20:42:36 EDT 2006 | davef
Hypothesis #1: We agree with Steve. You are probably seeing the nickel underplate. The gold was absorbed into the solder in portions of a second, so that you don't see it is not surprising. We're guessing that the gold was porous and allowed the n
Electronics Forum | Thu Jan 29 00:12:39 EST 2009 | grayman
Hi Armando, I think you have to buy a bigger reflow let say 7 zones to get the correct profile. The reason you are getting that problem is due to short profile time. What is the size of your board? What is the composition of your solder paste? Ple
Electronics Forum | Wed Jan 28 21:47:56 EST 2009 | padawanlinuxero
Hello! I am having trouble with the new changes from lead joint to lead free joint, we are working on change to lead free, I am using a 3 zone oven reflow, the zone temps are : zone 1 zone 2 zone 3 (top and bottom) 128 208 260 th
Electronics Forum | Mon Jan 19 14:54:38 EST 2004 | cyber_wolf
How did you come to the conclusion that you are having a cold joint problem. Just by appearance ? As Dave stated if you have any of the metals that he listed in the joints they will appear to be dull and grainy sometimes. But... Dave, I will have t
Electronics Forum | Thu Jun 25 18:28:23 EDT 1998 | Earl Moon
| Looking for articles/data comparing the quality/reliability of mass | reflowed SMT solderjoints versus hand soldered SMT solderjoints. As solder joint quality most often is subjective - that is visually compared with graphic examples, IPC is the B
Electronics Forum | Thu Jun 25 16:07:44 EDT 1998 | G. Hamblett
Looking for articles/data comparing the quality/reliability of mass reflowed SMT solderjoints versus hand soldered SMT solderjoints.
