Electronics Forum | Wed Jun 20 08:46:15 EDT 2012 | jdengler
Hello all, We have a customer requesting the use of Sn95/Sb5. Of course they are in a hurry and I have not found any in stock. I need solder paste and cored wire. We can use water soluble or low residue (no-clean) flux. Anyone have a lead on a s
Electronics Forum | Thu Dec 09 15:14:41 EST 1999 | Ron Costa
I have been seeing wetting problems with Texas Instruments componets. I am using Kester 596L OA water soluble solder paste. My reflow profile is in spec. for this formula. Has anybody else seen this problem and if so how did you resolve it? Any feed
Electronics Forum | Tue Apr 29 13:43:34 EDT 2008 | arminski
THANKS FOR YOUR REPLY GUYS... more background... solder paste is Water Soluble. We mask the potentiometers prior to aqeous washing using solder mask, then our operator brush the solder joints with IPA after the Wash Process...I'm concerned about th
Electronics Forum | Mon Nov 13 10:02:52 EST 2006 | pforister
Bill, We only allow 3 boards to be printed in front of the pick and place equipment. It is important to keep the abandon time to a minimum. You did not mention the paste that you use. Do you use no-clean or water soluble? Do you use lead free?
Electronics Forum | Fri Jul 17 11:49:58 EDT 1998 | Justin Medernach
| My question is in regards to how exactly temperature and humidity affect the stencil printing process. If temperatures here at the plant in the summer are 70-73 degrees F. and relative humidity is 60-65%,to what extent will the results of the ste
Electronics Forum | Tue Apr 13 21:32:42 EDT 2004 | aqueous
Dreamy, OA fluxes / pastes have differing levels of activity. Most OA fluxes must be cleaned very soon after reflow. OA fluxes and pastes, while offering an aggressive flux package and a relatively easy removal (solubility in water), they are the
Electronics Forum | Tue Jun 05 20:46:25 EDT 2007 | rfrog
I, too, have finished qualifying the Amtech paste for a dispensing application. We will be experimenting with the component soldering/stencil printing next. The stuff has proven to provide the best of both the no-clean/low solids and water washable
Electronics Forum | Wed Jul 17 12:07:48 EDT 2002 | dragonslayr
DaveF is correct in directing you to the archives. This problem type has been discussed many times, it is quite common. Questions to ask yourself and provide us with answers are: It always happens or random? All assemblies or just one? solder paste
Electronics Forum | Tue Jun 28 10:51:32 EDT 2005 | mattkehoe
Thanks for the replies, - solder paste used ? NC ? other ? Water soluble 63/37 paste - reflow in Air or N2 ? Infrared - temp ramp up before soack (�C/second) ? Will have to check. This profile has been used on numerous gold plated boards in our
Electronics Forum | Tue May 02 15:43:06 EDT 2006 | bhall
Thank you PWH, All good points. I use a semi-automatic printing process not a screen printer so if more solder balls and beads are created then I would be creating more re-work and that is exactly what I do not want to do. I guess the best thing to
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