Electronics Forum | Tue Jul 02 15:50:28 EDT 2002 | blnorman
FIrst, be a doubting Thomas and never trust supplier propaganda sheets, do your own testing. How often do you knead the paste? We have a standing requirement that if the paste printer is idle for 30 minutes, we have a minimum of 4 kneads before pri
Electronics Forum | Fri Feb 05 14:39:50 EST 2010 | gregcr
Hi All, We evaluated and approved KESTER R520A for our default RoHS solder paste a couple years back. It's time to re-evaluate to see if this material is still the best choice. Please let me know your opinion on the solder paste you are using, and
Electronics Forum | Sun Apr 26 08:36:55 EDT 2009 | davef
First, in direct answer to your question, DOE printer setup variables (MPM): * Squeegee speed: 0.5 to 1.0 in/sec * Pressure (metal): 1lb/in of blade * Pressure (plastic): 1.6-3 lb/in Second, supprting earlier responses, most people monitor paste hei
Electronics Forum | Tue Jul 13 16:19:05 EDT 2004 | Inspection Solution
Hi Mark, There are many tools available for measuring solder paste height. Most machines use laser as the basis for inspection while others use structured white light. If simple height and width inspection is all that is required, you can look int
Electronics Forum | Wed Oct 28 14:52:40 EST 1998 | Barry Kauffman
Can anyone supply me with info on determining the volume of paste left on a pad once reflowed compared to the intial amount put down? Is there a formula or something?
Electronics Forum | Sun Feb 27 14:24:05 EST 2005 | davef
pmdeuel: Was that "about 60 %solder and 40 % flux" according to volume or weight?
Electronics Forum | Sat Jan 07 06:43:44 EST 2006 | davef
Metal is about 50 percent by volume
Electronics Forum | Fri Jan 28 09:05:35 EST 2011 | ldavis
Use tape and reeled solder preforms and place them where ever you need more solder volume.
Electronics Forum | Tue Feb 17 01:12:52 EST 1998 | J.H. Kim
In solder bumping in flipchip technology by splder printing, the precise control of solder volume and height is very difficult. Therefore I'd like to know the solution of this problem. Thanks
Electronics Forum | Mon Feb 13 13:46:23 EST 2006 | slthomas
You can put metal in a microwave (at least you can mine) as long as it doesn't contact the enclosure, but there's no way you'll get consistent heating of the volume in a microwave, even if it employs a "carousel".
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