Electronics Forum | Tue May 09 18:00:33 EDT 2006 | russ
in all actuality, you are both right. Alpha metals does have the toughest/hardest noclean residue that I have seen. When changing to no-clean FLUX you should run different probes. So back to square one. You're both right so who's gonna win?
Electronics Forum | Thu Jan 29 17:04:43 EST 2009 | jeffjarmato
I run two different waves here one with SAC305 with aqueous flux the other with SN100C and No clean flux. Does anyone see any issues with running product through either machine of course after changing the Flux type? I also only use SAC305 alloy for
Electronics Forum | Thu Oct 27 20:37:49 EDT 2011 | tech1
the calibration error sounds like it is an electrical verifier issue. Are you testing parts before you place them? It could be that your centering electrodes are worn or dirty, or it could be the ribbon cables from the centering unit. If you are usin
Electronics Forum | Thu Aug 08 13:09:38 EDT 2013 | cyber_wolf
Hege, there is no actual calibration of the thermocouple itself. You can however verify that they read correctly. Heller sells an option on their reflow ovens specifically for this purpose. I hoping that someone chimes in here that is NADCAP certifi
Electronics Forum | Thu Aug 08 19:20:08 EDT 2013 | hegemon
I too am hoping a NADCAP guy might jump in here. I would like to know how this portion of the question is handled. Evidence of PM, periodic cleaning of EQ and tools, no issues. Thermocouple calibration? You would think that evidence of Oven CAL
Electronics Forum | Thu Nov 04 19:51:28 EST 1999 | John
Thanks folks. The current vendor is doing an alcohol wash, top and bottom, then performing an ionic test on 100 boards. I'm not to confident in the testing because the readings for a "clean" board are 25 ugm/sq in and a "dirty" board are 40 ugm/sq in
Electronics Forum | Wed Sep 25 10:56:27 EDT 2002 | xrayhipp
Yeah, perhaps lean more towards a ramp-to-spike profile - reducing the soak time and add a littel heat to your temp above liquid. This has worked for us with water soluable paste as we are not required to use no-clean and utilizing a 6-zone oven. G
Electronics Forum | Fri Aug 26 09:57:21 EDT 2005 | russ
The Immersion gold is not a problem with BGAs specifically but "black pad" which can be present anywhere. The unfortunate thing with BGAs is you cannot see it. Personally I hate white tin. It is okay for single sided boards running no-clean, but c
Electronics Forum | Fri Mar 03 11:56:51 EST 2006 | Brad
We have a customer that is transitioning to RoHS compliant assemblies. Their layouts are not changing from the old boards to the compliant ones so the stencils will remain unchanged. They are going through a transition phase where both will be buil
Electronics Forum | Wed Mar 04 22:57:05 EST 2009 | davef
Underfill epoxies may be classified into major groups [Capillary Underfill Manufacturing Development and Characterization for 2nd Level Electronic Interconnect Processes; B Salom�n; University of Puerto Rico, Mayaguez Campus; Dec 2004]: * Capillary.
