Electronics Forum | Tue Aug 17 11:24:04 EDT 2010 | namruht
I have a question that has been discussed many times, but is always good to get some new insight. We have lots of issues with our no clean process. We use a Kester EP256 solder paste. I would just like to get some general tips on how to get rid of mi
Electronics Forum | Tue Aug 17 16:07:23 EDT 2010 | scottp
Are you controlling humidity in your plant? I'm not familiar with that particular paste, but some pastes are sensitive to a humid environment. We also had one paste supplier send us a batch that had excessive solder balls if the boards were printed
Electronics Forum | Mon Aug 30 10:17:16 EDT 2010 | markgray
We currently use this devise in one of our designs with no issues. We are using a 3mil stencil and a 45% apperature reduction. It is virtually impossible to eliminate voids but they are in an acceptable range. Solder balls are caused on this componen
Electronics Forum | Thu Sep 09 05:23:10 EDT 2010 | 15009
You can reduce and almost eliminate voids and other paste related defects in LGA's BGA's, QFN's etc, by using solid solder deposit. Its been around for 24 years, 13 in the US. It is now included in the new IPC 7093 specification for bottom terminat
Electronics Forum | Tue Sep 14 21:03:42 EDT 2010 | genesan
Hi Sir, The diameter of the aperature is 17mil and thickness 6mil and since we are using Solder Paste Inspection i believe that should have a good paste deposit on this pad.Let say if no good paste it will more create insufficient solder which X-RAY
Electronics Forum | Tue Sep 21 08:44:08 EDT 2010 | fnorradd
Hi Guys, Quick question, does anyone know of any companies that referbish wave solder pallets. Ours are a little worse for wear, I know of BLT re impregnating the pallets, but can say that the pallet we tested the process on didn't look promising.
Electronics Forum | Thu Sep 30 15:46:22 EDT 2010 | vetteboy86
Hi Folks, I'm looking for detailed information about the different composition of circuit board pads. We have been experiencing some issues with our solder, and I would like to know the differences between compositions. I do know that we ran a cust
Electronics Forum | Tue Nov 02 07:50:18 EDT 2010 | babe7362000
I just need a clarification on NC254 No clean solder paste. If we have parts on the bottom side of the board that already are soldered and we go to run the other side of the board and it was misprinted, is it ok to run thru the washer? I just need
Electronics Forum | Thu Nov 11 13:00:20 EST 2010 | 18424
Thanks Dennis, The fact that someone other than myself has experienced this is good to hear. Solder mask type should be spec'd all the same through out the many board suppliers we use but its worth the check.I have checked with kester but am still aw
Electronics Forum | Wed Nov 17 10:03:29 EST 2010 | scottp
Instead of a minimum thickness, we require no exposed copper or SnCu intermetallic. We've been having a lot of trouble lately with suppliers of SN100 HASL boards giving us pads with very irregular solder deposits with areas of exposed intermetallic.
