Electronics Forum | Wed Jul 17 11:52:54 EDT 2002 | tmarc
Hello all, I have a question about OSP. The solder mask over traces leading to SMT pads, in some instances, does not cover all the way to the pad. Of course the stencil apertures do not include traces. After the SMT and reflow process, there is visib
Electronics Forum | Wed Jul 17 16:54:27 EDT 2002 | davef
Is it OK? �Is it OK?� => We have no earthly idea if this will shorten the life of your product. We don�t know your product from a shoebox. ;-) Seriously, exposed basis metal could have a variety of effects, depending on the product design and end
Electronics Forum | Mon Dec 17 09:38:27 EST 2012 | cyber_wolf
Why scrap paste if there is no degradation of performance? Do your own study to determine this.
Electronics Forum | Mon Feb 09 09:00:17 EST 2015 | jax
Outside the MSD issues stated already (and I cannot provide a exact time not knowing multiple factors like Humidity levels, temps, exposure times, etc...) OSP might be the very worst finish to use in this scenario of side 1 / store on a shelf / side
Electronics Forum | Wed May 26 15:02:40 EDT 1999 | Paul Bonstrom (SGI)
Looking for help in finding suitable high temp gasket for use in smt assy support application. Gasket used to restrain flex on smt module in area prone to localized heating due to nearby device removal (hot air). Current gasket mtl (neoprene) degra
Electronics Forum | Sat Mar 08 21:45:59 EST 2003 | MA/NY DDave
Hi The other thing the Ni does is to create a time barrier for the underlying copper (Cu) migration into the joint. Degradation still occurs yet it is slowed significantly. Diffusion Equations under, electonic current pressures across time, are inv
Electronics Forum | Sat Sep 02 01:31:07 EDT 2000 | Earl Moon
More eloquence and cowardice. In the words of Dave F "what a maroon!" Another noname without the intelligence or conviction to offer a good response or even a name. And the forum continues its self degradation. Pompous MoonAssMan Boogie
Electronics Forum | Wed Apr 11 23:47:14 EDT 2001 | zam_bri
Thank you for the feedback guys. The concerns I have is related to components' performance as well as chipped-off & cracks. Does the performance also degrading over the time? thx
Electronics Forum | Thu Apr 12 20:27:10 EDT 2001 | davef
Tantalum caps degrade over time. You should not be seeing "chipped-off & cracks" regardless of the age. This should not be a shelf-life issue, unless you are storing them in an aquarium. Tell us the story. Solderability is a shelf-life issue and
Electronics Forum | Wed May 30 10:21:10 EDT 2001 | Steve
Rather than meausre the stencil, why not measure it's output. The stencils function is to gage the right amount of solder in the right location. If you are measuring paste volume and you are tracking via SPC, you will begin to see a degradation when
