[tinwhiskers] Re: ACE Develops Lead Tinning System
- From: "Bob Landman" <rlandman@xxxxxxxxxxxxxxxxx>
- To: <tinwhiskers@xxxxxxxxxxxxx>
- Date: Sun, 1 Jun 2008 18:19:17 -0400
Fellows,
I was laughing at ACE for offering such a product. I think the idea of having
to coat each part with lead or removing lead from each part is ludicrous. It
is horribly expensive to use a process such as this and it encourages
conformity to the lead free requirement in RoHS.
Have we really come to this? In the year 2008? I find this hard to believe....
It is wrong to legislate SCIENCE. The Catholic Church tried that with Galileo.
The earth still went around the sun; it did not matter that the Church
declared the sun went around the earth and that the earth was the center of the
universe.
There is no, I repeat, NO practical substitute for lead; None, Nada, Zip.
This is not debatable at this time. Some day perhaps a cure will be found for
tin whiskers but there is NONE today or tomorrow.
We do not know how to stop them; we do not completely understand why they grow
in the first place.
If you have no lead whatsoever in the tin plating on your electronic parts (and
that means less than 3%) then you will guarantee that in >3 years time,
according to NASA, The US Navy and the US Air Force as well as all the experts
at mil/aerospace companies that I have personally talked with (and at this
point that is quite a few) your products will grow tin whiskers and they will
fail.
Tin whiskers grow through SAC alloys, they grow through conformal coatings,
they are conductive and they cause failures.
Period.
This is not an inconvenience, this is a catastrophe in the making.
Anyone who thinks otherwise must be on some really good drug or in a total
state of denial.
The tin whiskers will come home to short your products; just give them time.
If 3 years life is acceptable for you; well then good for you.
I don't think that quality makers of heart pacemakers, satellites, airplanes,
missiles and nuclear weapons will consent to a 3 year life of their products.
Not even automakers and telecommunications makers would accept such a short
lifespan for their products.
And you would not want them to.
Would you?
Bob Landman, President
Senior Member, IEEE PES
H&L Instruments, LLC
North Hampton, NH 03862-0580
www.hlinstruments.com
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Engelmaier@xxxxxxx
Sent: Sunday, June 01, 2008 2:00 PM
To: lauhs@xxxxxxxxxxxxxxxxx; tinwhiskers@xxxxxxxxxxxxx;
rlandman@xxxxxxxxxxxxxxxxx
Subject: [tinwhiskers] Re: ACE Develops Lead Tinning System
Hi John,
How are you? Have not seen you in a while.
I am happy as a lark, enjoying my family with my 6 grandkids. Also, I am still
enjoying what I am doing, getting quite a bit of golf in, some tennis, and of
course, skiing in the winter.
Well, I agree we are stuck with this Pb-ban nonsense. However, it was RoHS that
started it all. There is absolutely no logical, environmental or technical
reason for this Pb-ban, and ALL the consequences are bad. Sure, we can find
workarounds, none of which are as good and environmentally benign as the good
old SnPb. But why go through this exercise, and all the resources wasted on
this, when the outcome is environmentally less sound.
Just so the politicians can proclaim to the ignorant constituency "Look what we
have done for you!" Too bad that Hans Christian Andersen's' fable 'The
Emperor's New Clothes' is a fable, and no such little child would have the
impact with his "The emperor is naked!"
Regards,
Werner Engelmaier
可靠性先生
Engelmaier Associates, L.C.
Electronic Packaging, Interconnection and Reliability Consulting
7 Jasmine Run
Ormond Beach, FL 32174 USA
Phone: 386-437-8747, Cell: 386-316-5904
E-mail: Engelmaier@xxxxxxx, Website: www.engelmaier.com
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