Electronics Forum | Wed May 18 14:58:05 EDT 2005 | splice
Hi, I am having some PTH non wetting issues. Setup and chronology of events is explained: Set Up; Part: 1 MM pitch connector 378 pins Solder: Kester Ultra Pure 63/37 solder Pot; 250 C pre heat; Peak 94C top side Flux: Qualitek 775, Fluxer: foam T
Electronics Forum | Thu May 19 17:03:11 EDT 2005 | splice1
Hi all, There are no ground layers which makes the non wetting rate a bit confounding. The foam fluxer has not been cleaned in a while though, while there is a strong evidence of fluxing by running blank paper and looking up the top side
Electronics Forum | Wed Apr 11 20:49:39 EDT 2007 | raychamp007
3W. Figure 8-84 shown evidence of heel bend wetting(but no written criteria mention about the solder fillet must present at the heel bend). It is acceptable if the minimum D(3W/75%L)extend from toe which is no evidence of solder fillet at heel bend?
Electronics Forum | Fri Apr 29 14:16:16 EDT 2011 | ppcbs
Below is the long explanation. This defect is most commonly found with BGA components, but can arrise with all components. I see it happening more now with lead free boards that are being assembled with a no clean flux. Best short term remedy is t
Electronics Forum | Mon Dec 18 08:52:57 EST 2006 | russ
You need to get yourself a copy of IPC 610. this has all the specs regrding placement and registration. chip aprts are allowed to have 50% side overhang. the fillet requirements are "evidence of wetted fillet" . I would not know if a cap being 51
Electronics Forum | Tue Aug 04 14:29:14 EDT 2020 | dwl
Is the component an LGA or BGA? If its a BGA, it appears like the component is missing balls, if its an LGA, it appears like the solder isn't wetting to the component. What solder are you using? The wetting to the larger pads in the last pic seems
Electronics Forum | Wed Nov 06 12:56:10 EST 2002 | slthomas
What I'm seeing is an occasional pattern of tear drop shaped features in a sea of nice shiny solder. The little islands don't really have any relief.....it's more of a surface finish feature than a 3-dimensional feature. The wetting angles are good,
Electronics Forum | Fri Feb 26 10:39:03 EST 2010 | patrickbruneel
A recalled Toyota Corolla went straight through the front door of a home in Georgia. Pretty much like the professor simulated but in real life. This was a recalled vehicle so evidently the pedal theory might be incorrect. http://www.cnn.com/video/
Electronics Forum | Thu Jul 10 22:34:34 EDT 2008 | davef
We wouldn't get our underware in a knot about poor wetting on a lead that is not connected to the board. IPC standards seen to say that the inspector should use common sense in interpreting standards requirements. Then again, it's not all that common
Electronics Forum | Wed Jul 09 16:05:12 EDT 2008 | bkreiman
We are using a right-angle SMT power connector on a board. The connector has 4 leads and two board alignment pins. The layout for the board is such that 1 of the leads is not used and the pad for the lead is not connected to anything, not even grou
