Electronics Forum | Wed Sep 14 13:09:59 EDT 2005 | EddieW
Well said KEN! Frank, you will not find much out there for free advice on lead-free from anyone besides manufactures who supply equipment and material for lead-free and all they will tell you is to use their stuff cause its the best. The companies
Electronics Forum | Thu Sep 16 21:46:16 EDT 2004 | jeremyt
I work for a major OEM as well, and we have close to 1000 stencils in house. We just recently went to a new way of labeling our stencils. We ordered metal ID tags out of McMaster, and assigned a Number to each stencil. We then attached each tag to t
Electronics Forum | Thu Sep 23 14:58:50 EDT 2004 | C Lampron
EMS-Engineer, Lead free alloys have a very low wetting creep. You probably will not ever get the same type of weting with a LF as opposed to SN 63/37. The question is if it is acceptable. Lead free solder joints cannot be inspected to the same crite
Electronics Forum | Mon Oct 25 17:55:47 EDT 2004 | Mike
Circuit Science, Inc. Plymouth, MN Mike Dupont / Sale Mgr. www.circuitscience.com miked@circuitscience.com Please send me an email and we will take a look at your pcb. We have been in the PCB industry for over 30 years. 2 layer boards - 18 lay
Electronics Forum | Fri Oct 08 08:28:27 EDT 2004 | davef
Wonder Solder [ TRT-Wonder.com ] is a proprietary silver solder. Some cynics might say Wonder Solder got its name because the people that started the firm wondered if anyone was crazy enough to pay that much for solder. Most audiophile silver solde
Electronics Forum | Wed Dec 22 23:29:57 EST 2004 | KEN
Check with Dupont's web site. They have a wealth of information on the various polyimide products they manufacture. I was quite surrised at the differences in materials and in particular the dimensional stability and hydroscopy. Good stuff mayna
Electronics Forum | Wed Jan 12 13:27:42 EST 2005 | carobin
The two options I see are (not including underfill): 1) Have complete conformal coating coverage of all balls with no webbing in between balls because of CTE mismatches. If all the balls are not coated we see failure in humidity testing. or 2) Sea
Electronics Forum | Mon Jan 17 14:03:45 EST 2005 | davef
There's a fair amount of information on underfilling CSP and flip chip in the web. Look here to get started: * http://www.asymtek.com/news/articles/2002_globaltronics_csp_and_fcuf.pdf * http://www.smta.org/knowledge/proceedings_abstract.cfm?PROC_ID
Electronics Forum | Tue Feb 01 12:52:19 EST 2005 | jbrower
Hi Tom, I did talk to Bob Gilbert about the sn100c. His comment is that it is a nickle stabalized alloy. Simplisticly, the tin and copper molecules would rather bond with the nickle. He also mentioned that with the SAC alloys, the manufactuers were
Electronics Forum | Wed Feb 02 11:10:07 EST 2005 | jdengler
Hi AJ, I've never used the Flexa due to the price. We replaced our MCS with eSMT Software (web site http://www.esmt-software.com/). You might want to look at this if you don't need all of the Flexa features. We have older Fuji equipment (GSP's
