Not just information and misinformation but, worse, disinformation.
Brian
Joe Fjelstad wrote:
> Thanks for your comments, Bob.
>
> I posted the item without comment for purposes of getting discussion (such
> as you have offered) going.
>
> There are many in this forum who share your sentiments. (I saw as I was
> writing that one of those stalwart souls has made this known to you... :-)
>
> Yes, there has been a lot of information and misinformation put out over the
> last several years that has become incorporated as part of a belief system
> without fully testing the premises but then there are legislative forces at
> work that are push many in our industry to put on a brave face and soldier on.
> Until there is relief, there are few alternatives but we are agreed that
> recycling is one of the big ones that can be used to cut the Gordian Knot)
>
> Fortunately, the truth has a way of finding its way back to the surface no
> matter what is tossed on it. (your response a case in point... :-)
>
> Thanks again for sharing your thoughts and experiences, Bob.
>
> Best wishes,
> Joe
>
> PS you may wish to duplicate your response on TechNet as not everyone is on
> both forums.
>
>
>
> In a message dated 1/26/2009 6:33:16 P.M. Pacific Standard Time,
> [log in to unmask] writes:
>
> Joe,
>
> This article is full of misinformation. The following is one glaring
> example:
>
> "For commercial applications, lead-free components are plenty reliable. Tin
> whiskers are not likely to grow on the components in your cell phone or
> television. Plus, consumers don�t expect a commercial electronic product to last
> more than a few years. In military and space applications, however, systems
> have to last decades, facing extreme weather, temperature and vibration."
>
> There is no truth to the statement that only extreme weather, temperature
> and vibration cause tin whisker growth. How do you explain whiskering in air
> conditioned computer rooms, in heart pacemakers (FDA recall of a Medtronic
> device)? The fact is current science does NOT know what causes whiskers to
> grow; if we did we could experiment with mitigation strategies much more easily.
> Yes, high temp and humidity seem to accelerate growth but that is not
> conclusive. I ask each of you - do you expect to throw away your refrigerator,
> HDTV, automobile, heart pacemaker... "in a few years"? If we are doing this to
> help the environment, tell me how throw-away electronics is good for the
> environment? Anyone here for RECYCLING?
>
> The following is a really silly statement:
>
> " �Most companies in the exempt industries are using COTS parts,� said Gary
> Nevison, legislation and environmental affairs manager at Newark. �They�re
> using lead-free components primarily because nothing else is available. But
> they take additional precautions to ensure high reliability.�
>
> One of those additional precautions is dipping lead-free components in lead
> to enhance reliability."
>
> Dipping parts in lead isn't mitigation, it's remanufacturing! And yes, it's
> VERY expensive. I find it somewhat good news that Avnet is considering a
> lead dipping service for it's customers but what will happen to the original
> part warranty? Because Avnet is an authorized distributor, will they also be
> an authorized re-manufacturer?
>
> Here's some more nonsense: "Lead was originally added to tin to mitigate the
> tin whisker problem."
>
> My word, that's news to me! Stop the presses! NO, that is NOT TRUE.
> Tin-lead is a eutectic connection alloy that works well for conductivity,
> ductility, and vibration resistance. Tin whiskering was discovered in the 1960s at
> Bell Telephone in switching centers. Cadmium whiskers were found in radio
> equipment in WW II.
>
> Still more misstatements:
>
> "�People have done a lot of work developing mitigation strategies such as
> evaluating lead-free finishes that are less of a problem,� said Brady. �Plenty
> of people are spending their careers on this topic.� These efforts have met
> with success, but they tend to be expensive."
>
> There is NO, repeat, NO lead free alloy that eliminates tin whiskering. Use
> 3% lead if you want to suppress whiskering.
>
> Read the materials at the NASA website (http://nepp.nasa.gov/WHISKER/) - the
> truth shall set you free (but it will scare the hell out of you).
>
> Sincerely,
>
> Bob Landman, President
> Senior Member, IEEE PES, Reliability Society
> H&L Instruments, LLC
> Electro-Optics for Industry & Science
> 34 Post Road, PO Box 580
> North Hampton, NH 03862-0580
> (tel) 603-964-1818 (fax) 603-964-8881
> www.hlinstruments.com
>
>
> -----Original Message-----
> From: Leadfree [mailto:[log in to unmask]] On Behalf Of Joe Fjelstad
> Sent: Monday, January 26, 2009 6:36 PM
> To: [log in to unmask]
> Subject: [LF] link to EDN article of possible interest (EOM)
>
> http://www.edn.com/article/CA6630671.html?nid=3351&rid=1549644147
>
>
> **************From Wall Street to Main Street and everywhere in between, stay
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