Electronics Forum | Mon Aug 08 08:32:42 EDT 2016 | emeto
Just get a regular scale(small thin one - like a scale for kitchen). Mount it over a PCB and simulate placement with certain force. Hold the nozzle down for long time in order to register accurate reading from the scale. Then, just change parameters
Electronics Forum | Tue Aug 13 20:58:06 EDT 2002 | davef
Peterson: Ionic flux residues when combined with moisture and a voltage differential can plate conductive �fingers� on the surface of a PCB, but that doesn�t sound like what�s going on here. Your NC flux should not be particularly conductive. For
Electronics Forum | Sat Mar 29 08:38:28 EST 2003 | davef
Iman When you talk about your profile, can we assume you're measuring it on the pads of LGA? Profile the solder paste reflow by placing a thermal couple under the component pad, similar to a BGA. On a slight tangent, as with soldering BGA, paste
Electronics Forum | Fri Sep 15 16:37:49 EDT 2000 | Dave F
Sounds like someone aimin� fo tha big hurt, if ya axes me. Two spots to place your lawn darts are: 1 J Hwang in "Modern Solder Technology � " states (p.354) that " � extreme CTE mismatch between silicon IC (~2) and the PCB (~16), solder connections
Electronics Forum | Fri Jan 28 12:18:32 EST 2005 | Chunks
Your best bet is to do a decision making matrix. Each company has so many different criteria�s it's hard to pick out which one might be important to yours. Simply pick out your top 5 paste manufactures. Next decide what your "Eliminators" are - th
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