Electronics Forum | Wed Mar 12 10:26:10 EDT 2008 | realchunks
Why would a board failure related problem be a process problem. I agree most companies believe EVERY problem is a Proces Problem, but in the real world we know this is not true. A pad lifting means your solder joint was able to rip it off the boa
Electronics Forum | Wed Mar 12 23:00:10 EDT 2008 | davef
You can say: The pad was lifted after reflow and prior to the dye and pry failure analysis. When we see lifted pads, we think: * That's a good solder connection * Either it took a lot of force to lift that pad or the fabrication of the board in the
Electronics Forum | Fri Mar 14 11:28:09 EDT 2008 | operator
I agree. The only way to make them care is to show them how it effects their pocket book. If you don't charge them they will continue not caring. If you do charge them you risk hurting their feelings and making them look bad in front of their bosses
Electronics Forum | Thu Mar 20 07:58:12 EDT 2008 | cyber_wolf
#1Run a Fuji gold board and see if the problem persist. Is your board clamp slipping? Fid camera tight? etc.. To see if you have a Y axis positioning problem: 1.Put the machine in mecha check 2.Go into Y-axis 3.Place a dial indicator so that the st
Electronics Forum | Thu Mar 20 09:55:11 EDT 2008 | swag
We have a class 3 SMT build that requires the paste conforms to J-STD-005 RE LO. We have not used a low activity flux in the past and would prefer not to have to change our wash process or change to no-clean paste for these builds. I have researche
Electronics Forum | Thu Apr 10 07:47:47 EDT 2008 | ck_the_flip
Stencil design and pad layout are key. Too far apart - bad. If your pad geometry is correct, try the inverted home plate. That has worked well for me in the past. That, coupled with a 5-mil stencil. With regard to solder paste, some manufacturer
Electronics Forum | Tue Apr 15 03:16:14 EDT 2008 | janz
Hello, We are having a problem with soldering QFP100 (16mmx16mmx1mm). Board dimensions: 70mmx50mmx1.8. FR4 two layers � single SMT assembly. Finish: HASL-lead free Oven: 7 zones �hot air Paste: lead free We have noticed that two groups of legs
Electronics Forum | Mon May 12 11:56:03 EDT 2008 | vms
Sr. Tech I thought that was you, and have been wondering how you was doing. Any one that has been around this pcb business, if there is a business any more, knows that we all get involved in dealings that we could have done different. I do have a f
Electronics Forum | Tue May 06 12:49:50 EDT 2008 | markhoch
Ya know a little clear RTV around the feet of your conveyors will keep them from moving when Bubba the Quality Director needs to take a load off and leans against it. And if you ever need to move them later, just cut around the base with a box cutter
Electronics Forum | Wed May 07 15:26:05 EDT 2008 | joeherz
Interesting - We're using the same AIM products as you. On the lead free, 353, did you start out with it or did you try the WS485? That was the 1st product recommendation we got from AIM and we found that the lot to lot consistency was not good. T
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