FWIW, modules replaced while under warranty will more than likely be sent
back to supplier....
Bob Landman
<rlandman@HLINSTR
UMENTS.COM> To
Sent by: Leadfree [log in to unmask]
<[log in to unmask] cc
>
Subject
Re: [LF] Perfect opportunity for
02/01/2010 10:33 tin whiskers induced failures -
AM Toyota did not install brake
override systems despite complaints
Please respond to
"(Leadfree
Electronics
Assembly Forum)"
<[log in to unmask]
>; Please respond
to
Bob Landman
<rlandman@HLINSTR
UMENTS.COM>
When the body count rises.
It's just a question of time.
Experiments done recently at CALCE and elsewhere show it's possible to
grow whiskers in weeks, not years.
The stress and heat/humidity in autos is ideal for creating problems
with lead-free assemblies.
Unless the laws of physics have been repealed, failures will occur.
Determining the cause may take a long time (years) because car dealers
will do repairs by swapping out modules. I doubt they will keep the
bad parts or send them to the mfg for analysis. Unless the failure
rate spikes up significantly, or there are fatalities, as we have
learned from this incident with Toyota, nothing will be done.
That is why Ron Lasky's pronouncement that lead-free is ok (as it's
been 3 years since RoHS and we know of no failures is a falacious
argument.
Just look at the history of tin whiskers going back to the 1940s.
Each generation of engineers needs to learn the hard way.
Bob Landman
H&L Instruments,LLC
Sent from my iPhone
On Feb 1, 2010, at 9:50 AM, "Pete Houwen"<[log in to unmask]>
wrote:
> I have not yet seen any legitimate connection made between Toyota's
> problem and Tin Whiskers. But I have heard people comment about
> it. In one
> anecdote I see as a good sign, an aquaintance, who has no background
> in
> electronics and isn't highly aware of mine, brought it up. Agood
> sign in that
> the folly of lead free is becoming known to the general public.
> When does the
> backlash start?
>
>
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