Electronics Forum | Tue Jul 30 12:15:15 EDT 2002 | Rick Lathrop
Hi Dave, The paste applied to the board ends up on the tombstone. The pad has a thin covering of solder most of the time, this is why I think they call it a dewet. Occasionally the pad shows some areas of gold and very rarely are some pads not wet at
Electronics Forum | Mon May 22 18:19:29 EDT 2006 | Steve
I have read some threads about poor wetting on palladium-silver (Pd-Ag) coated components. I followed the suggestions, but I am still having a problem. The part is an 0603 chip type (Vishay varistor). The Process: solder paste is lead-free Alpha Met
Electronics Forum | Wed Jul 31 08:23:49 EDT 2002 | mcm4me
221C). 2D vision can very effectively detect % pad coverage, I use it on my DEK and this customer has an MPM which I also believe to be capable. Here is another fact, when the customer uses Brand X solder paste the defects due to what they call pad
Electronics Forum | Fri Mar 23 03:41:19 EDT 2012 | grahamcooper22
try Almit Sn62 HM1 RMA V14L ....its the best no clean lead paste for wetting...I sell it and it has solved wetting problems many times when users have used other pastes
Electronics Forum | Fri Mar 23 10:00:38 EDT 2012 | isd_jwendell
I am a big fan of AIM SnPb solder paste. I currently use NC257-2 (no-clean, 89.5%), and recommend you include it in your evaluations.
Electronics Forum | Thu Mar 22 13:06:50 EDT 2012 | smtmfgeng
Does anyone have any insight on alternatives to Indium NC-SMQ 92J solder paste for minimizing poor wetting on parts with oxidized leads (see datasheet here: http://www.dtsprocess.com/contents/articlefiles/6-SMQ92j.pdf). I am considering setting up a
Electronics Forum | Tue Feb 11 09:47:53 EST 2014 | spoiltforchoice
Perhaps a photo of the faults you are encountering might shed some light on the issue. I would think it would take some extremely poor paste handling or paste for the paste itself to be the root cause of what you seem to be describing. I would be inc
Electronics Forum | Wed Jul 27 09:58:05 EDT 2011 | davef
Pressure printing systems Conventional stencil printing techniques have fundamental limitations as regards paste handling: The volume of paste available for printing is limited, so frequent replenishment is necessary Paste is difficult to c
Electronics Forum | Tue Jan 16 10:19:36 EST 2007 | slthomas
Then how do we explain the poor printing performance (appears to be rheology based, paste thickening/drying, poor aperture fill, sticking to the blades, etc.) of paste that has exceeded it's shelf life? You know, the stuff that no amount of stirring
Electronics Forum | Thu Jun 01 05:06:10 EDT 2006 | EC
Hi, I facing some 1005 component with poor wetting and look like not enough solder...... Is there any standard solder paste volume requirement. Appreciate all the input.
