Electronics Forum | Mon Aug 08 08:18:52 EDT 2005 | davef
Rob We agree with Jason's point about swab lead indicators. You need to be careful interpreting the results. Lead must be in sufficient measurable quantities as found in Sn 63/37 or Sn 60/40 solders. Handheld units are: * Oxford (bought the X-Met
Electronics Forum | Wed Jul 20 09:50:06 EDT 2005 | Larry Smith
XRF (x-ray fluorescence spectroscopy) testing
Electronics Forum | Wed Apr 02 15:55:04 EDT 2008 | boardhouse
See if you can find someone with an XRF machine or talk to your Current Board house they probably have this equiptment if they run ENIG or Silver finishes. I would stop in with some boards your having issues with and have them measure the thickness.
Electronics Forum | Tue Nov 22 21:08:45 EST 2005 | davef
CMI International says, there are five basic, non-destructive methods of determining coating thickness. Each method was devised to achieve cost-effective, accurate, and repeatable results. Those methods are: * X-Ray fluorescence * Eddy-current * M
Electronics Forum | Thu Mar 27 22:00:27 EST 2003 | davef
Enrique It's true that higher energy guns do a better job measuring "light" materials. [Actually, if that was true by itself, you'd expect the fabricator's readings to be higher than yours. But, HEY!!!] Regardless, there's alot more to getting an
Electronics Forum | Mon Mar 21 09:33:25 EST 2005 | davef
RoHS Substance||RoHS MCV Limits||Typical Testing Approaches Lead||1000 ppm* ||Wet chemical digestion followed by ICP (Inductively coupled plasma) or AAS (atomic absorption) spectroscopy ||||XRF (X-ray fluorescence) spectroscopy Cadmium||100 ppm ||Wet
Electronics Forum | Fri Nov 08 08:52:54 EST 2002 | dphilbrick
Juan There are many things that cause this and the first thing I would do is request quality records from your board fab facility on that particular lot. If they are unwilling to give them to you this is a good sign they had a processing problem. Th
Electronics Forum | Wed Jul 26 10:06:19 EDT 2000 | Doug Philbrick
I have read many of the past threads on both topics and I still am not convinced I know the answer to the soldering problem we are encountering. I am hopping someone can help. I have a dense SMT board we are building and have been building for some
Electronics Forum | Fri Sep 24 10:57:18 EDT 1999 | Earl Moon
| Hi Folks: | | We've been having bridging problems on our fine-pitch QFP's, despite thorough inspection of paste height, volume, and placement accuracies....profiles look good also. | | The bridging is happening after coming out of reflow...one la
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