Electronics Forum: 9.8 (Page 1 of 1)

Siemens F5HM, latest software

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

Flux Conductivity

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

SMT process Blowhole/ Pinhole

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

Re: CTE mismatch

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

SMT Solder paste and wave flux evaluation

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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