Electronics Forum | Sat Apr 20 10:12:16 EDT 2002 | davef
If people use an inert gas, they use nitrogen for mass soldering. Inert gases get progressively more expensive as you move down the periodic table. Many times no-clean flux is less active than other flux types. So, people use an inert gas to lower
Electronics Forum | Tue Apr 23 14:20:48 EDT 2002 | russ
We have not yet sent this out for analysis, So, I don't really know what it is. initial evaluation would lead me to believe that it is flux since it is only present on the solder joints themselves and nowhere else. I noticed that you also mentioned
Electronics Forum | Mon May 13 11:17:57 EDT 2002 | genny
I think for our company, the reason we have not yet tried it is two fold. One - we are just barely starting to see a need on a new product under design for a flat finish, so currently we don't use any of the really flat finishes available. Two - Silv
Electronics Forum | Fri May 17 22:25:51 EDT 2002 | xzinxzin
*the other components are 0402 and SOIC 16, the solderability were good. *the protection on the terminations of microleadframe package is Cu(copper),somebody call that leadless leadframe package(LLP). *the time above 210 deg C is about 10 sec. *I us
Electronics Forum | Sat May 18 07:36:31 EDT 2002 | davef
Copper teminations with no solderability protection on your LLP. Hmmm seems unusual, but it could be that the flux in your solder paste is not active enough to remove the corrosion on the Cu leads. OMG Microbond solder paste develops white residue
Electronics Forum | Tue Aug 13 13:50:57 EDT 2002 | ksfacinelli
A couple of years back we saw the same issue. It was when we were using a water soluble flux on a post wash assemble for a power switch. This was corrected when we switched to a no clean flux product. The appearance of the no clean products is les
Electronics Forum | Fri Aug 16 10:58:36 EDT 2002 | kenbliss
Hi Steven www.smta.org, http://www.ipc.org are two industry association sites that have lots of information and technical papers. As far as efficiencies try http://www.blissindustries.com click on Bliss University, there is a lot of unbiased
Electronics Forum | Wed Oct 23 15:33:38 EDT 2002 | Randy V.
Dye penetrant is a liguid that will wick through very small cracks. I used over 10 years ago for checking cracks in glass feedthru's in hermetic packages. You put the dye on one side of the seal and developer (white) on the other side and the red dye
Electronics Forum | Mon Dec 23 17:36:23 EST 2002 | davef
Periodically, we get ahead of ourselves and find that we have fabricated boards that require jumpers and other modications. Alternatives are: * Add 'white wire' jumpers and mod the components as third ops * Print, cure, and seal 'jumpers' of epoxy i
Electronics Forum | Sat Feb 01 04:49:59 EST 2003 | testing
Hi, We currently have several AOIs on our production/test line which I feel as an engineer, are not being used to their true potential. Does anyone have any ideas on how I can improve their use i.e SPC, Placement in the production line etc since we
