On Sunday 27 July 2008 07:49:10 am gene wrote: > have you guys seen the 'tin-whisker' problem with lead free solder?
Note that these links are from 2006, but still give an interesting background. http://www.greensupplyline.com/showArticle.jhtml?articleID=181401276 http://www.indium.com/blogs/Dr-Lasky-Blog/entry.php?id=444 has some interesting things to say about this issue. Like SWatch's billion dollar recall. Designing ultrahigh impedance circuits like Electrostatic meters, or ultra low power circuits have always been problematic. Lead Free isn't doing anything to make things easier. What I find most annoying is the comment in the above blog that he considers five years "long term". See a previous rant of mine on this issue: http://www.dragonsgate.net/pipermail/icc-avr/2002-October/000347.html <RANT ON> I want my products to have a life of 10 to 20 *YEARS*, not 6 months. I do my designing in the region of the country affectionately called "The Rust Belt" by the Semiconductor people. We do the unglamorous things like water and sewage treatment controls for example. The infrastructures can't afford to "upgrade" every few months just because some one wants to play PacMan on their Cell Phone. Consider this: Which is more important to you: A) You can play PacMan on your Cell Phone. B) When you flush it goes away and you don't have to think about it. <RANT OFF> [Can anyone explain this grammatical anomaly that the spelling checkers says "ultrahigh" is a correctly spelled word, but "ultralow" is not?] -- http://www.wearablesmartsensors.com/ http://www.softwaresafety.net/ http://www.designer-iii.com/ http://www.unusualresearch.com/ _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
