[tinwhiskers] Re: R: Re: R: Re: R: Re: ACE Develops Lead Tinning Syste m
- From: "Bob Landman" <rlandman@xxxxxxxxxxxxxxxxx>
- To: <tinwhiskers@xxxxxxxxxxxxx>, <salag@xxxxxxxxxxx>
- Date: Sat, 7 Jun 2008 21:58:26 -0400
Werner,
I very much disagree with your Table 1
http://www.analysistech.com/downloads/SolderJointDesignForReliability.PDF which
states that consumer electronics should have a 1-3 years of service. Where do
you get this data? Is it perhaps it's from wishful thinking on the part of the
"consumer' industry? I can assure you that but for the fact that pure tin
whiskers will most certainly result in failures of consumer equipment after 3
years (or sooner), most consumer equipment would have had a much longer life.
Is this the cloaked dark hand of industry? Is this the smoking gun? Is this the
game that is afoot? Is the plan to make consumers throw out what they buy in
1-3 years?
I note that the words "tin whiskers" are never mentioned in your paper. Why is
that? What good is perfecting solder joint reliability when products fail due
to the absence of lead in the solder and on the parts being soldered? How
exactly does that magic happen?
Quite frankly, I guess most of us here on this forum are not be surprised at
your figures. We suspected something like this was behind RoHS.
You have confirmed our suspicions; Gabriele is correct.
By the way, how do you then manage to extrapolate ~10 years of service for the
automotive industry? And 5-10 years for the space industry? Do you expect
satellites to come crashing down after 5 years?
Do you really expect the auto industry to replate all the tin plated components
they are forced to buy as NASA and the DOD is doing now (expecting by doing so
a far longer life than 5-10 years - Voyager being a prime example)?
Since automotive electronics is ~30% of the cost of the typical automobile
today, what do you estimate that additional cost will be? You know who will
bear it, don't you? The consumer. And why, pray tell should they? For the
so-called environment? Or for the consultants who grow richer off this new
found business?
Bob Landman
H&L Instruments
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Engelmaier@xxxxxxx
Sent: Saturday, June 07, 2008 7:45 PM
To: salag@xxxxxxxxxxx; tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: R: Re: R: Re: R: Re: ACE Develops Lead Tinning System
Whow, Gabriele,
You say: "Reliability? it will become a matter for book?s writers or for
discussion in some workshop or tech seminary as well. Producer?s strategy is :
Warranty Extension for a lead free product, it has been demonstrated to be a
cheaper solution then invest money to asses and evaluate in advance the
reliability of a solder joint, etc. according to the more sophisticated
Industrial or International Standards."
The workshops and seminars is correct, HOWEVER, who, pray tell, 'demonstrated
[warranty extension] to be a cheaper solution...[to]... invest money to asses
and evaluate in advance the reliability of a solder joint, etc.
That is nonsense.
If you follow the 'Design-for-Reliability' procedures shown in IPC-D-279 you
have great assurance of reliability?excepting tin whiskers, of course, for
solder joints. The reliability of the PCBs may take a little more doing, but my
white Paper goes a long way.
Doing it right at the design stage does not cost anything?you just have to know
what you are doing.
Werner
Future workshops:
Reliability Issues with Lead-Free Soldering Processes, June 17, London
Interconnect Failures and Design for Reliability for PCB PTHs, June 17, London
Solder Joint Reliability: Parts 1 through 4, July 17/18, Thal, Switzerland
Pb-Free Soldering Processes?Survival, Quality, Reliability, August 18, Orlando
Reliability Issues with Lead-Free Soldering Processes, September 22, Schaumburg
Failure Mode and Root Cause Analyses Reliability (Fatigue, Brittle Fracture,
ENIG), September 22, Schaumburg
Other related posts:
- » [tinwhiskers] Re: R: Re: R: Re: R: Re: ACE Develops Lead Tinning Syste m
