Electronics Forum | Mon May 24 19:43:46 EDT 2010 | jry74
Can anyone share some good practices to reduce FOD in the conformal coat area? I am new and trying to get my hands around a serious FOD issue. We get red, black, blue, and white fibers that gets trapped in our conformal coat, causing a lot of scopi
Electronics Forum | Wed Oct 03 09:23:21 EDT 2012 | kkay
Well what we have seen so far is that the voiding occurs on nearly every part, but only underneath the terminations. When we run a board with no parts we do not see any voiding as there are no terminations to trap the out-gassing from the pads. Next
Electronics Forum | Sat Mar 14 15:48:40 EDT 2015 | horchak
The white haze is definitely an indication of moisture being trapped in uncured or improperly applied solder mask. You can verify this by heating up the board using a heat gun on an area of the board with the white haze, and if it clears up that is t
Electronics Forum | Fri Nov 02 17:23:52 EDT 2018 | cbart
are these requirements outlined by your company or the manufacture of the part? if its your company is the product tested? if so the test guys don't usually like to power things up with water trapped in them or under them as it can cause some problem
Electronics Forum | Mon Nov 26 09:33:49 EST 2018 | charliedci
The problem you create by soldering from solder destination side (presuming you have already soldered from other side) is that you will trap air in PTH so you have virtually no continuous solder in PTH from one side to other. This will not meet IPC-A
Electronics Forum | Tue May 21 16:18:57 EDT 2019 | edhare
Interesting problem. I've seen this before on SMT device leads (see Gold Embrittlement paper at http://www.semlab.com). The AuSn4 IMC is solid at typical reflow temperatures and traps volatiles in the solder joint. One usually cannot crank the ref
Electronics Forum | Wed May 20 14:03:53 EDT 2020 | dwl
Buy a dryer to go with your compressor. Compressed air traps a lot of water and you don't want that in your air lines on your P&P machines. Additionally, make sure you keep up with all the preventative maintenance and change out the filters as requir
Electronics Forum | Thu May 20 22:42:19 EDT 1999 | Dave F
| hi everybody, | We've been doing some studies on assembly of CSPs. We assembled these packages on micrivia-in-pad patterns. These are 15/13.5/11 mil pads with 6 mil design microvia, using photo/laser/plasma tech. We are seeing voids, as big as the
Electronics Forum | Mon Jan 18 17:58:09 EST 1999 | marc p
| I have a severe problem with flux residue being drawn up the vent ducts of my reflow oven. This residue reaches a critical mass then begins to flow down the ducts and becomes very messy. I run a no-clean process and use IR oven. Has anyone else o
Electronics Forum | Fri Nov 18 09:21:41 EST 2016 | sumote
Lazy operators empowered by management. Sounds like you may have some nepotism? Since it falls to you to clean up someone else’s mess I have an idea for you. I once worked for a company that had a large wash sink with a hand sprayer very similar to
