Jim,
1. ACI built hardware with SnPb solders, using components finished with
Lead Free finishes (Sn, Pd, NiPd, etc.) for the Lead Free Components
Focus Group and our own internal Lead Free Projects, and found no
incompatibilities. Of course, the metallurgy of the solder joint was
different than what you would expect with SnPb finishes.
2. My gut tells me that sooner or later (~ 2006 timeframe), SnPb
finishes will no longer be available in the long term. As the conversion
from SnPb to Lead Free continues, the availability of components
finished with SnPb will decrease. IMHO, the component market requirement
for SnPb finished components will not be sufficiently large enough to
have component manufacturers support both a SnPb and Lead Free
production line for the same electronic package. Of course this also
depends on the type of packages (chip components vs. leaded SMT devices
vs. etc.).
Hope this helps.
Good Luck.
Lee Whiteman
Senior Manufacturing Engineer
American Competitiveness Institute
E-Mail: [log in to unmask]
Ph: (610) 362-1200 x208
Fax: (610) 362-1290
This message is for informational purposes only and does not supersede,
modify, or create any agreements with ACI. Information contained in this
message does not bind ACI or its affiliates to any commitment, either
express or implied, unless ratified in writing by an authorized
representative.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Marsico, James
Sent: Monday, January 26, 2004 9:12 AM
To: [log in to unmask]
Subject: Re: [TN] Lead-free Component Finishes
I wasn't planning to make the change over to lead-free processing. Some
concerns with the lead-free initiative are:
1) I understand that some component manufacturers have started
supplying lead-free finishes without changing the part numbers. If this
is true, how will this impact my assembly process if I use PbSn solder?
2) If I specify tin-lead finish, some parts may fall under the
diminishing manufacturing source (DMS) management requirements. Will
tin-lead finished be available down the road?
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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