[tinwhiskers] Re: [LF] A Change in Paradigm: Maximum Whisker Length Just Got Longer
- From: Steve Smith <steve@xxxxxxxxxxxxxxxxxxxxxx>
- To: "Bob Landman" <rlandman@xxxxxxxxxxxxxxxxx>
- Date: Fri, 5 Feb 2010 13:03:58 -0800
Awesome!!
Bob, Send this to Fox News. You have first-hand experience. Fox is the
only news service that seems to have the guts to report what other
news services and Government agencies try to bury.
Steve Smith
BL> And there's even more.
BL> There's a lawsuit in Michigan. A 77 yr old lady driving a 2005
BL> Camry (that is not part of the recall) died in 2008 when her car
BL> suddenly accelerated to 80 mph, leap into the air and hit a tree.
BL> The story is in the NY Times and it's very detailed. Apparently
BL> Toyota and the NHTSA agreed not to count as failures any vehicles
BL> that suddenly accelerated if the brake had been applied.
BL> http://www.nytimes.com/2010/02/05/business/05recall.html?th&emc=th
BL> I had a similar problem years ago in our 1990 Merc Sable. Had to
BL> have a diagnostic recorder attached to the car and then we drove
BL> it for many days pushing a button when the car suddenly
BL> accelerated then taking it to the dealer to have the record
BL> downloaded for analysis. The dealer finally traced the problem to
BL> a bad throttle position sensor. Replaced it and it happened again.
BL> It took THREE replacements before they got us a replacement that
BL> did not cause sudden acceleration. We nicknamed the car "killer". Not so
funny now.
BL> Fortunately for us, if we pressed hard on the brake (caught it
BL> quick enough) we could stop the car. We'd be driving along and
BL> all of a sudden you'd hear the engine roar. The first time it did
BL> it, I was so surprised I didn't know what to do and then slammed
BL> on the brakes. Good thing we wear seatbelts!
BL> This issue with Toyota more and more smells of a coverup.
BL> Bob
BL> -----Original Message-----
BL> From: Leadfree [mailto:Leadfree@xxxxxxx] On Behalf Of Whittaker, Dewey
(EHCOE)
BL> Sent: Friday, February 05, 2010 1:15 PM
BL> To: Leadfree@xxxxxxx
BL> Subject: Re: [LF] A Change in Paradigm: Maximum Whisker Length Just Got
Longer
BL> John, Chris and Werner,
BL> I would have hoped my alternative for a finish would have been
BL> more than just a term to describe the view of you circling.
BL> Dewey
BL> -----Original Message-----
BL> From: Leadfree [mailto:Leadfree@xxxxxxx] On Behalf Of John Burke
BL> Sent: Friday, February 05, 2010 11:03 AM
BL> To: Leadfree@xxxxxxx
BL> Subject: Re: [LF] A Change in Paradigm: Maximum Whisker Length Just Got
Longer
BL> Of course if Dewey were on line he would probably state that the
BL> American consumer takes a dim view of auto reliability problems.....8-)
BL> John Burke
BL> (408) 515 4992
BL> -----Original Message-----
BL> From: Leadfree [mailto:Leadfree@xxxxxxx] On Behalf Of Mike Buetow
BL> Sent: Friday, February 05, 2010 9:04 AM
BL> To: Leadfree@xxxxxxx
BL> Subject: Re: [LF] A Change in Paradigm: Maximum Whisker Length Just Got
Longer
BL> More on Toyota. Now they are questioning if the electronics
BL> problems extend to the headlights.
BL> http://seattletimes.nwsource.com/html/nationworld/2010986931_toyota05.ht
BL> ml
BL> Mike Buetow
BL> Circuits Assembly
BL> w/m 617-327-4702
>>>> REGISTER FOR VIRTUAL PCB -- MARCH 2-4 www.virtual-pcb.com <<<
BL> -----Original Message-----
BL> From: Leadfree [mailto:Leadfree@xxxxxxx] On Behalf Of Bob Landman
BL> Sent: Thursday, February 04, 2010 4:29 PM
BL> To: Leadfree@xxxxxxx
BL> Subject: [LF] A Change in Paradigm: Maximum Whisker Length Just Got Longer
BL> Have you read this article ?
BL> Tin whisker induced field failures of medical equipment using
BL> flexible film connector (FFC) contact receptacle that is ("matte" <--
supplier's
BL> terminology) tin plating over 1.5 microns nickel over copper alloy
BL> http://www.dfrsolutions.com/uploads/white-papers/Maximum_Whisker_Length2
BL> .pdf
BL> Tin Whisker Mitigation
BL> Current, DfR advises companies that mitigation of components with
BL> lead spacings greater than 500 microns may not be necessary if the
BL> plating is matte tin and the manufacturer demonstrates some
BL> evidence of control (either through process control or periodic
BL> testing). Leads with welding operations or pressure contacts do
BL> not fall under that recommendation.
BL> DfR is now modifying our approach and we now recommend that NO
BL> tin-plated connectors be used unless physical barriers are present
BL> between leads/pins or the spacing between leads is at least 1000
BL> to 2000 microns (driven by degree of risk aversion).
BL> ===================
BL> That's quite a recommendation!
BL>
BL> Bob Landman
BL> H&L Instruments, LLC
BL> __________ Information from ESET NOD32 Antivirus, version of
BL> virus signature database 4839 (20100205) __________
BL> The message was checked by ESET NOD32 Antivirus.
BL> http://www.eset.com
--
Best regards,
Steve mailto:steve@xxxxxxxxxxxxxxxxxxxxxx
www.consultingscientist.us
http://www.pickensplan.com/
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