Electronics Forum | Thu Oct 27 11:45:06 EDT 2005 | Jeffm
I have a multi layer (8) PWB with blind vias going from 1 to 7 that is experiencing occasional blistering (delam). It is only on perhaps 15% of the boards run. We vacuum baked (85C, not sure what pressure) a sample lot and still had a few exhibit the
Electronics Forum | Tue Feb 21 09:19:50 EST 2006 | Chunks
Hi Mark, Not to be condescending, but is your 265 camera in focus? I've seen one instance of this. If it�s not the camera, and you are sure all your other parameters are good, , then poor definition can be from bad snap-off or bad gasketing. Snap
Electronics Forum | Fri Apr 21 00:56:44 EDT 2006 | pavel_murtishev
Good morning, MPM AP25 we have is equipped with dedicated vacuum support only, no side snuggers. Also we had a lot of issues with fine pitch paste deposition due to this poor support. Vacuum support can�t fix wrapped boards properly causing a lot of
Electronics Forum | Tue May 30 17:06:13 EDT 2006 | Board House
Hi Steve, I would say that 98 % of score shops do them dry, When the product gets back to the board house they would run the panel through a rinse dryer to get the score dust off of the Panel, Most Score machines have Vacuums built into the cutter h
Electronics Forum | Tue Sep 12 15:02:39 EDT 2006 | Fred
We are being pushed to use seaborne shipping containers as the method to receive PCB�s from fab houses in China. Time on the ocean will be several days to a few weeks depending on how slow the boat is. Does anyone have any suggestions on packaging
Electronics Forum | Wed Jan 24 11:22:46 EST 2007 | pr
Do you still have the vacuum plates in? If so, you can set the grid-lok up in the "fixed mode" (not sure what they call it,where it won't set for each board), then you could run without side clamps and the Vacuum should be enough to keep it from movi
Electronics Forum | Mon Jul 16 12:03:42 EDT 2007 | davef
We're aware of no industy acceptance standard for max moisture content of a board. For more on moisture levels, get a copy of: "Removing Moisture from Electronic Components and Assemblies", CS Leech, Jr, Circuits Assembly, May 1994. The article disc
Electronics Forum | Thu Sep 13 14:18:59 EDT 2007 | slthomas
Just a little status update. When it's running and I monitor the I/O, the mount vacuum bit never turns over to 0. It may be turning over enough to run, but not long enough to see on screen. It stays at 1. When it errors, I can trip it by putting my
Electronics Forum | Wed Jun 18 01:47:25 EDT 2008 | sleech
Innovative Drying Co., considered this possibility early in our experiments. The rate of chamber pump-down is not a consideration. However, the selection of the vacuum pump is critical. Avoid oil-sealed pumps at all costs. A poorly maintained oil-tra
Electronics Forum | Mon Mar 09 05:45:42 EDT 2009 | ghcarnu
Am comandat niste duze speciale pentru manipularea unor conectori miniatura; cel care s-a angajat sa le faca le-a testat pe un banc, nu pe masina, utilizand o sursa de vacuum care genera 26 inch de vacuum; voiam sa stiu daca Emerald genereaza cam tot
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