Electronics Forum | Wed Feb 28 14:22:53 EST 2007 | samir
Hey Patrick, have you heard the latest on Al Gore? How typical and this doesn't include all the times Gore flies on private jets adding even more CO2 to the atmosphere. Can anyone say HYPOCRITE. "Al Gore�s Personal Energy Use Is His Own "Incon
Electronics Forum | Mon May 09 10:52:29 EDT 2005 | patrickbruneel
Hannu, First and for all I have a problem with your question "tried and trusted" for the simple reason that you are going to change too lead-free. Ultrasonic soldering or welding is not new, as far as I know it is only used applying the ultrasonic
Electronics Forum | Wed Jul 04 13:25:03 EDT 2012 | davef
Baking boards to remove moisture takes a lot more energy than you'd think. Following on with this, Chris Hunt from NPL gave a presentation at IPC APEX 2012 about the results of his research ["Impedance Testing for Sensitivity to Delamination in Print
Electronics Forum | Fri Jun 01 11:06:17 EDT 2012 | davef
Post-reflow delamination is almost always caused by entrapped moisture. Here's more from the fine SMTnet Archives ... http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=64774 As Graham Cooper suggests in an earlier posting on this thread, ba
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 | Fri Jul 06 12:07:07 EDT 2001 | nwyatt
I have been researching lead-free paste for a while now and I will share with you what I can. Firstly, SnAgCu seems to be the common industry choice. It really depends on your application - the cell phone/pda sector is primarly using different comb
Electronics Forum | Thu Aug 05 06:29:18 EDT 1999 | Graham Naisbitt
| | | We're getting field failures in a high impedance portion of the circuit. Think the unpopulated pc card has contaminates because we were able to grow dendrites by applying a 9 volt battery across the suspected pad, placed a drop of de-ionized w
Electronics Forum | Tue Aug 07 20:43:47 EDT 2001 | davef
First, we know that MIL types are wont to use charts like that. Give �em Weibull distribution tables and then they�ll be happy, happy. A good book is Nelson �Accelerated Testing: Statistical Models �� Wiley Second, we don�t use that very nice stu
Electronics Forum | Fri Apr 30 15:09:56 EDT 1999 | Steve Gregory
How's the "Great Gas-out" going for ya'll? Myself, I'm doing real good! Haven't farted all day...(GRIN) Anyways, a thread got started down below about this so-called "Lead Free" stuff, and I just wanna' put my two cents in about the whole thing. We
Electronics Forum | Mon May 03 16:59:52 EDT 1999 | Wayne Bracy
| How's the "Great Gas-out" going for ya'll? | | Myself, I'm doing real good! Haven't farted all day...(GRIN) | | Anyways, a thread got started down below about this so-called "Lead Free" stuff, and I just wanna' put my two cents in about the whole
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