Electronics Forum | Wed Aug 21 18:30:16 EDT 2002 | dragonslayr
am reminiscent of a time, after some hard duty at the local drinkin hole, having sneezed and my vent pipe expurgated. ooowwweeee - what an em bare ass ment won't go into details about clean up method or fancy swabbin tools or high tech fluids requir
Electronics Forum | Mon Apr 07 04:33:43 EDT 2003 | Neil
Iman, How long after washing the boards do you process them? Are there any vias or Micro vias on any of the pads you see the blow holes on? A possible cause of a blow hole in a solder fillet or PCB is the escaping of Moisture under extreme temps. Th
Electronics Forum | Sat May 17 02:13:43 EDT 2003 | Hon Choi
Thanks all. We are using no clean, so the boards are not washed. That would eliminate the trapped water issue. We would check the PCB after dismounting the BGA, and the short would not be found. When we place another BGA on the board, the board w
Electronics Forum | Wed May 25 18:33:18 EDT 2005 | russ
We have passed testing using this process, I would consider it on a case by case basis however. We are very careful about the quantity of the O.A. that we use. The water soluble flux is gone after cleaning unless it was/could be encapsulated or tra
Electronics Forum | Mon Oct 03 19:15:32 EDT 2005 | cn
is this a single brd or multi up array? What is the thickness? where were the brds made, state/country? I had an issues with a brd which was fabed in mexico during the humid months there was mosture trapped in the brds which caused many strang things
Electronics Forum | Mon Feb 19 14:28:35 EST 2007 | John
To: Wave Master Larry, You are correct in one respect. There is always dross on the wave, but it is a result of oxidation of the tin and lead. It IN NO WAY POSITIVELY EFFECTS the solder process, in fact, dross trapped in the solder joint is a detri
Electronics Forum | Wed Feb 01 18:11:43 EST 2006 | Chris
I wonder if they are concerned about getting chemicals trapped in the tented vias. If the tented vias have pin hole openings or even larger openings, chemicals from the ENIG process could become entrapped in the via holes and not washed away in the
Electronics Forum | Mon Feb 27 19:48:32 EST 2006 | stepheniii
I'm not sure that would be valid. My understanding was that solids were trapped by other non-active flux residue. Which is why you can leave them on and why you see white residue after washing. I think the ROSE test would release particles that woul
Electronics Forum | Wed Mar 15 09:36:43 EST 2006 | vicknesh28
Thanks Marc. I will try the things that u have mentioned. I am guessing if the flux can find its way between the bottom foot of the lead and the paste, there has to be a gap between the solder paste and the lead when reflow takes place. As u have sai
Electronics Forum | Thu Jun 29 04:34:22 EDT 2006 | Rob
Just because someone has great equipment doesn't mean they are any good at assembling quality boards. By all means check out their current capacity & contingency plans, but also assess their competance levels & output quality. Set a cunning trap fo
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