Jim,
1. There is a plethora of Lead Free component finishes out on the
market. However, the industry is settling on a few. According to a
Soldertec survey of component manufacturers in 2003, here's the
breakdown:
Pure Sn - 24%
PdAu - 16%
AuNi - 14%
Don't Know - 11% and coming down (I presume)
SnAgCu - 11%
SnCu - 7%
SnAg - 7%
SnBi - 5%
Ag - 5%
What is interesting is that Sn is the majority finish of choice (due to
the similarities of the plating process between Sn and SnPb), despite
the Sn whisker problems that have been documented. The Lead Free
Components Focus Group soldered components finished with NiPd and Ni, so
there are other finishes available.
2. I've contacted several individuals concerning the WEEE Directives and
the RoHS Directives. Basically, by July 1, 2006, unless your hardware is
formally listed as an exemption within the EU legislation, the hardware
will have to be lead free. While military hardware is "exempt" from the
directives, since the aerospace market is < 1% of the entire electronics
market, I anticipate that the aerospace markets will be forced to go
lead free since SnPb finished components and SnPb solders may not be
available in the long term.
Hope this helps.
Good Luck.
Lee Whiteman
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Marsico, James
Sent: Thursday, January 22, 2004 7:16 AM
To: [log in to unmask]
Subject: [TN] Lead-free Component Finishes
Hello Technet:
With the current world-wide initiative to eliminate lead from
electronics manufacturing, I'm assuming that the component manufactures
are also making the change. What types of component lead finishes can I
expect with the transition to lead-free, and how would they impact an
existing a tin-lead process?
Also, is the European mandate to be lead-free by July 2006 a requirement
for only consumer products? What about commercial or military?
Thanks for your assistance.
Jim Marsico
Senior Engineer
Production Engineering
EDO Electronics Systems Group
[log in to unmask] <mailto:[log in to unmask]> 631-595-5879
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