Electronics Forum | Mon Nov 06 13:35:10 EST 2006 | Theresa Spear
We are starting up a new clean room for SMT production and wondering if anyone is aware of any guideline for operating humidity and temperature ranges for the room. We know that the MSD's will prefer it to be dry and cool. However, there are other f
Electronics Forum | Thu Aug 02 15:15:52 EDT 2007 | realchunks
Yes I have. Leaded toys, anti-freeze toothpaste, cardboard biscuits, glue-less tires... the list goes on. And it's only about 1/1000th of what is caught. But in China's defense, why not sell this stuff to the U.S.? They boost their economy and ki
Electronics Forum | Fri Feb 15 11:23:44 EST 2008 | realchunks
Print material through stencil onto Plexi-glass and place Plexi onto your board. Sure, it may cause a little clean up but this where the metal meets the meat. Don't worry about ESD cause you have no component on the board yet (sorry Quality guys -
Electronics Forum | Fri Aug 22 10:01:52 EDT 2008 | robinj
I have seen this problem before. If the color is yellow usually it is caused by moisture left on the boards from poor drying after immersion silver. One of the ways to get rid of this is by dipping in acid cleaner solution. If the board supplier uses
Electronics Forum | Wed Aug 27 18:28:29 EDT 2008 | blnorman
We have an immersion silver board that has a brown discoloration after processing. It's not flux residue, that normally doesn't cause this condition. Elemental analysis shows less than 1% sulfur, and I thought silver sulfide is more a black color.
Electronics Forum | Mon Apr 26 14:40:07 EDT 2010 | blnorman
We had one product that used immersion silver plating. There were a couple of instances where we saw tarnishing, and elemental analysis confirmed the presence of sulfur. These boards did have the anti-tarnish sheets between boards, but somehow they
Electronics Forum | Wed Jun 09 11:41:25 EDT 2010 | smtmax
Hi Danny, I would suggest a laser-cut stencils w/ anti static polymer film. For more information on the stencil you should consider engineering lab. They provide high quality stencil for a reasonable price. If you can find a laser-cut stencil for a
Electronics Forum | Thu Jan 03 14:19:33 EST 2013 | uksolder
Beej, The tool supplied works well as long as the bath is up to temp and the nozzle tip was not cross threaded when fitted. Did you apply a small amount of the anti seize paste before the nozzle tip was fitted? I have seen dry tight threads if not ap
Electronics Forum | Fri Jan 04 14:31:35 EST 2013 | tombstonesmt
Thank you guys. I will check this stuff out. It > quite possibly could be something we have done > wrong. Thanks again for the feedback Add anti seize to the threads. We do this to all of our nozzles when we first "tin" them with Active8. We usua
Electronics Forum | Fri May 11 20:55:51 EDT 2018 | jlawson
Rehm Thermal Systems (Germany)offer in process vacuum reflow in convection ovens and vapor phase pending what makes sense - volumes of PCB per hour needed. There are other vendors getting into this of course. Can only get single digit void free join
