Lee provides some interesting points upon which to ponder.
Of course, reliability and quality issues provide the main basis for the
proposed exemptions on selected products--Automotive, Avionics, Servers,
Telecom Equipment, Medical Devices, etc.
One may reasonably expect many quality issues to proliferate during the
conversion of consumer goods to lead-free.
There is quite a lack of experience with Pb-free solders and the new
component materials needed to withstand higher reflow temperatures, etc.
There can be a huge difference in results between by the failure of a
mini-DVD music player and failures in avionics or medical devices.
It makes sense to let the consumer industry handle the high development
costs associated with developing these new processes, qualifying the new
materials, training, etc. and develop quality/reliability data before
critical components convert.
Some product lines are very expensive and it is unlikely that the product
line will be able to switch back and forth between no-Pb and Pb production.
Therefore, as Lee notes, once these suppliers convert a product or process
to Pb-free, the Pb production will no longer be available.
The question remains whether markets will support higher costs associated
with Pb-free products.
-----Original Message-----
From: Lee Whiteman [mailto:[log in to unmask]]
Sent: Wednesday, August 01, 2001 1:02 PM
To: [log in to unmask]
Subject: Re: [LF] Eutectic alloys?????
Lynn,
Is there any published data to support your claims on product reliability
with SnAgCu? What type of components did you test? I (and others) would be
very interested in this type of information.
Concerning aerospace, my impression is that aerospace manufacturers will go
Pb-Free after the consumer markets go Pb-Free. While several companies and
research institutions are looking into Pb-Free, the aerospace and military
electronics industry is not aggressively investigating Pb-Free (as far as I
can observe). But this lack of pursuit introduces an interesting problem...
Aerospace (military and aerospace electronics manufacturers) represents less
than 1% of the electronics manufacturing market...
Assuming that consumer electronics goes Pb-Free, will the component
manufacturers still provide SnPb finished components for military and
aerospace electronics manufacturers? If a substantial percentage of that
market is Pb-Free, will that drive / force the military and aerospace
electronics community to go Pb-Free? How will this impact the introduction
of COTS hardware to military and aerospace electronics community? And will
the military and aerospace electronics community be prepared to go Pb-Free
if SnPb is no longer available? What are the logistical and sustainment
issues concerning introducing Pb-Free to the military and aerospace
electronics community?
These issue impact the technical and non-technical aspects of the Aerospace
community, but little has been said. Any comments?
Lee Whiteman
Senior Manufacturing Engineer
E-Mail: [log in to unmask] <mailto:[log in to unmask]>
Ph: (610) 362-1200 x208
Fax: (610) 362-1290
> -----Original Message-----
> From: Leadfree [mailto:[log in to unmask]]On Behalf Of Lynn Norman
> Sent: Wednesday, August 01, 2001 12:25 PM
> To: [log in to unmask]
> Subject: Re: [LF] Eutectic alloys?????
>
>
> Both aerospace and automotive companies are running to embrace lead-free
> technology on the basis that it could get them out of this thermal
> management bind. Ford have already made the jump.
>
> Working in the automotive electronic industry, I can tell you
> that we AREN'T
> "running to embrace lead-free". On the contrary we are against it. The
> main reason we're evaluating lead-free is purely market driven. We have
> test data that shows the SAC alloy is much less reliable at high
> (underhood)
> temperatures and with longer dwell times. We won't start manufacturing
> modules for underhood applications with lead-free until we are forced to.
>
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