We are seeing components with this finish. There is data to support the
acceptability of a final lead finish containing up to 3% Bismuth.
Dewey

-----Original Message-----
From: Leadfree [mailto:[log in to unmask]]On Behalf Of Genny Gibbard
Sent: Thursday, January 06, 2005 9:15 AM
To: [log in to unmask]
Subject: [LF] The use of Bismuth


So I am curious, what are people thinking about the use of bismuth in lead
free termination finishes.  I am not talking about solder containing Bi.
The only supplier I have come across so far specifically mentioning they use
Bi is NEC.  They have a doc on their website, called "Japan's best kept
secret" http://www.cel.com/pdf/marcomnews/japan_best.pdf        that claims
that SnBi is recommended by JEITA, as opposed to the recommendation of JEDEC
for Matte Sn.  They make it sound as if a lot of companies are using this
plating, but I haven't come across any other components so far that use it.
The main concern I have is that I keep getting the impression that the next
metal that the EU will be gunning for eliminating is Bi, so it doesn't sound
like a smart direction to go.

Thoughts?

Genny Gibbard (mailto:[log in to unmask])

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