Ladies and Gentlemen,
There is NO actual or proposed EU legislation to ban the use of bismuth. Period. Yes, Bi is a byproduct of lead mining but more and more of it now is coming as a byproduct of mining other metals (tungsten). Check out the US Geological Survey web page for bismuth.
http://minerals.usgs.gov/minerals/pubs/commodity/bismuth/bismumcs04.pdf
And as Pratap points out, it is not SnBi by itself that is bad, it is the SnBiPb alloy that is the problem. Mixing SnBi with SnPb, as shown by Boeing is REALLY bad. However, Tom Woodward (Boeing) has also shown that smaller amounts of Bi is actually not a problem, at least not to the same extent. I do not want to put words in Tom's mouth that everything is hunky dory about lesser amounts than in the SnBi eutectic, but things do not look as bad as first thought for alloys containing single digit amounts or Bi.
regards,
Bev Christian
Research in Motion
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]]On Behalf Of Richard Schumacher
Sent: January 6, 2005 12:03 PM
To: [log in to unmask]
Subject: Re: [LF] The use of Bismuth
Dewey, what finish alloys use up to 3% Bi?
Genny, what indications have you seen that the EU may eventually want to ban
Bi?
> -----Original Message-----
> From: Leadfree [mailto:[log in to unmask]] On Behalf Of
> Whittaker, Dewey (AZ75)
> Sent: Thursday, January 06, 2005 10:30 AM
> To: [log in to unmask]
> Subject: Re: [LF] The use of Bismuth
>
>
> 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])
>
> --------------------------------------------------------------
> --------------
> ---Leadfee Mail List provided as a service by IPC using
> LISTSERV 1.8d To unsubscribe, send a message to
> [log in to unmask] with following text in the BODY (NOT the
> subject field): SIGNOFF Leadfree To temporarily stop/(start)
> delivery of Leadree for vacation breaks send: SET Leadfree
> NOMAIL/(MAIL) Search previous postings at:
> http://listserv.ipc.org/archives Please visit IPC web > site
> http://www.ipc.org/contentpage.asp?Pageid=4.3.16
> for additional information, or contact Keach Sasamori at
> [log in to unmask] or 847-615-7100 ext.2815
> --------------------------------------------------------------
-------------------------------------------------------------------------------Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-------------------------------------------------------------------------------
---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.
-------------------------------------------------------------------------------Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-------------------------------------------------------------------------------
|
