Electronics Forum | Thu Jul 15 19:05:58 EDT 1999 | Earl Moon
| | | We have been encountering diminishing ball shear readings these past few weeks, despite the fact that we did not change any ball shear tester parameter. Our reflow parameters are also within spec limits. ( 210-220 deg C max temp. and 40-60 sec
Electronics Forum | Wed Feb 28 19:48:11 EST 2001 | davef
If we were talking about a single board problem, we�d be thinking about the laminate, but since you imply the problem is broad-based across multiple assemblies, consider the following machine parameters: * Crank-up preheat time / temperature to driv
Electronics Forum | Wed May 24 15:59:34 EDT 2006 | JohnM
I have a product with mixed in Pb free and Pb BGAs. I decide to use SnPb paste with Pb free reflow profile to make it work for both types of BGA. Do I have a reliability solder joint issue by using this method? How is your opinion on this case? Can
Electronics Forum | Fri Aug 02 12:01:40 EDT 2002 | johnw
interesting, not at all what we were told so yes lot's of contradictions comming from them, I have to say personally I've not beein impressed with there technical service of late, are they getting complacent I ask? it's strange they say it'll cause
Electronics Forum | Sat Feb 05 09:08:18 EST 2000 | Dave F
Casimir: Let me expand on something that I said in my response to your thread on ionic testing. Generally, no-clean people don�t use ROSE testing as part of their process control, because the ROSE test is essentially washing your board in DI/IPA �
Electronics Forum | Thu Feb 11 14:36:42 EST 1999 | Evelyn York
Hey, has anybody experienced problems with solder balls falling off BGA's? I have not been able to identify a contaminant nor any physical problems that would cause this. On packages with 'good' adhesion I have not observed any intermetallic form
Electronics Forum | Mon Aug 11 10:48:06 EDT 2008 | realchunks
Too much flux will spatter and can leave balls on either side. From your pix you may too little flux. Try turning up and see. Also try hand applying your alcohol based flux and running through. Will take away a few question marks.
Electronics Forum | Wed May 03 02:26:10 EDT 2017 | Rob
Hi Phil, we were given a ball park of approx $125K for a non inline version for one of our applications. Can't find the inline quote.
Electronics Forum | Thu Aug 01 13:04:57 EDT 2002 | gdstanton
Its interesting. It appears I'm getting conflicting feeback from Indium. This says its not a problem... http://indium.custhelp.com/cgi-bin/indium.cfg/php/enduser/std_adp.php?p_sid=kTDKGClg&p_lva=&p_faqid=355&p_created=1014734692&p_sp=cF9ncmlkc29
Electronics Forum | Mon Dec 11 15:50:01 EST 2000 | externet
Hi ! Try fresh DRY solder paste... Keep solder paste in a sealed container until the moment of use. Humidity absorbed by the soldering paste becomes vapor violently at the moment of heating it , expelling the solder in form of balls everywhere.
