Electronics Forum: cracking and pps (Page 1 of 6)

BGA and Gold Boards

Electronics Forum | Fri Jun 19 09:45:21 EDT 1998 | Mike Cox

Has anyone had experience with placing BGA on gold plated boards. I thought I read a while ago there was a problem with embrittlment causing cracked joints. If anyone has experience with this your feedback would be great. Mike

Dye and Pry

Electronics Forum | Sat Mar 15 01:03:10 EDT 2008 | callckq

All, What if BGA solder crack do exist after the shock test? Its happen at the corner of the BGA. Base on your experience, what are the potential root causes? Thanks, Sean

Dye and Pry

Electronics Forum | Wed Mar 12 07:33:40 EDT 2008 | callckq

Hi All, One PCBA failed test after went through the Shock Test(Vibration) and suspected to be BGA solder ball crack. We performed dye and pry and found PCB's pad lifted with red mark ink penetrate pad underneath, what does this mean? Can I say the

Dye and Pry on PoPs?

Electronics Forum | Tue Aug 16 09:37:58 EDT 2011 | blnorman

Dye and pry is frequently used on BGAs to determine if there is a crack at the board level or component level interconnect. C-SAM will show internal delaminations of components, not sure how well it would work with solder joint cracks. You can also

V-scoring design and equipment questions

Electronics Forum | Mon Jun 12 17:32:17 EDT 2006 | flipit

Hi, A little off subject but I just finished a quick little experiment where I placed 0201 to 1206 and some ceramic resonators at specific distances off the scored edge. The distances from scored edge ranged from 0.025" on up at 0.025" increments.

Pick and Place drops nozzles

Electronics Forum | Wed Jul 27 12:50:59 EDT 2005 | mnguyen

You may want to look at which spindle that is dropping the nozzle and check the O-ring on the spindle head. It's probably bad, cracked, or broken. Replace it and that will fix it

Water cleaning and Moisture Entrapment

Electronics Forum | Wed Dec 24 11:23:22 EST 2008 | childs

I can't seem to locate any information/concerns about moisture entrapment in IC packages on the promary side in a double sided SMT assembly using water soluable solder paste when soldering the second side. A typical process would assemble/reflow/cle

Water cleaning and Moisture Entrapment

Electronics Forum | Mon Dec 29 09:10:22 EST 2008 | stepheniii

It takes time for the moisture to penetrate into the body. I think the 5 years of ambient would be more the culprit than washing the boards. Especially since you are baking them after wash. Get a few of the ICs and put them loose on a board and put

Moisture Sensitivity and Package Cracking

Electronics Forum | Mon Jan 25 18:15:39 EST 1999 | Joe

Greetings, We are discussing what should and what should not be baked and vacuum packed. Should we just concentrate on the fine pitch packages and the bga's? What about those components which come on blister tape, should they get baked and re-packed

Re: BGA and Gold Boards

Electronics Forum | Wed Jun 24 16:23:29 EDT 1998 | Justin Medernach

Has anyone had experience with placing BGA on gold plated boards. I thought I read a while ago there was a problem with embrittlment causing cracked joints. If anyone has experience with this your feedback would be great. Mike Mike, Your concer

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