Electronics Forum | Thu Nov 01 10:31:51 EDT 2007 | glenearl
We've not performed any incoming electrical testing on these caps, as it has always been assumed that new parts would be good. However, after reading a number of messages on this site, I'm starting to have my doubts whether or not that is a good pra
Electronics Forum | Sat Nov 03 09:39:27 EDT 2007 | davef
Flux exhaused or CSP never came to peak temperature * BGA balls don't combine with the solder => Flux exhaused or BGA balls never came to peak temperature * 0402 surface looks like many tin balls piled together => Flux exhaused Start your thermal
Electronics Forum | Tue Nov 13 12:25:12 EST 2007 | gradloff
I have a thick board with ground planes that will be soldered by hand with a mildly active solder/flux. X-ray confirmed that solder was added to the top of the joint causing a void between the bottom and top solder joint. Other than the mildly acti
Electronics Forum | Wed Nov 28 07:41:10 EST 2007 | davef
DevGru: Questions are: * What steps do you recommend taking to "watch out for the exothermic heat from the curing?" * What are typical temperatures for exothermic heat from the curing? * What is the duration of such temperatures? * Do epoxy suppliers
Electronics Forum | Fri Nov 23 14:55:11 EST 2007 | aj
A couple of points - 1.I would recommend that you get your solder paste supplier involved as this could be their issue , let them do some research into proving that its not ! 2.Is the problem happening on this product only or do you see it on other
Electronics Forum | Mon Dec 17 02:08:21 EST 2007 | mun4o
Hi, I have a lot of solder bridge in our wave soldering process.We use SACX0307 and Surf 11 flux.the SW mashine is Vitronics delta 6622.Itry to change flux and termoprofile but results is not god.Can you halp me - recommend me some flux or other adv
Electronics Forum | Wed Jan 09 13:03:22 EST 2008 | patrickbruneel
Matte solder mask greatly reduces the potential for solder balls, and since you altered the machine parameters with no improvement it might be flux related. Do you use a VOC free (water based) or alcohol based no-clean flux? Do you use machine settin
Electronics Forum | Mon Jan 14 23:02:52 EST 2008 | davef
You don't mention any particular IC or manufacturer or marking method. However, most IC marking is done with lasers these days. The laser actually alters the encapsulation so the only way to erase the marking is to remove the encapsulation. Otherwise
Electronics Forum | Wed Jan 23 20:11:14 EST 2008 | davef
In previous threads, similar to this here on SMTnet, varies folk have made recommendations, as follows. Fixed position (mounted) [In-line] laser bar code scanners: * microscan 800-762-1149 info@microscan.com [Ken SMTnet] * symbol technologies symbol.
Electronics Forum | Sat Feb 02 08:19:40 EST 2008 | davef
Operator: use http://www.jedec.org/DOWNLOAD/search/jstd033b.pdf BillG: Sometimes, the recommended bake times are numbingly long, because the authors of J-STD-033 assumed that: * Component took-on a large amount of moisture * You want your component
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