Mike,
Thanks. That's what I thought, but I just wanted some hand-holding. :)
Just for interest for the wider audience, we have caught:
1) A major LCD supplier
2) A major producer of BGAs
3) A major chip manufacturer
Each gave us certified RoHS compliant parts that were not. Now in each
case I am sure that the mistake was not done for devious purposes. In
one case it was an honest misinterpretation of the directive and in the
other two it was an "oops!". Nevertheless, these are cases that could
have come back to bit us. All three involved lead. We have tested
hundreds and hundreds of parts.
Bev
RIM
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Mike Kirschner
Sent: Tuesday, June 27, 2006 11:13 AM
To: [log in to unmask]
Subject: Re: [LF] Clarification sought on Pb-containing ceramic
Bev,
I've had this discussion with one of the major SMT resistor
manufacturers.
They consider it a glass with a "conductive phase in it"; just the same,
glass or ceramic it's exempt in electronic components.
Mike
On Mon, 26 Jun 2006 08:41:49 -0400, Bev Christian <[log in to unmask]>
wrote:
>"Examples of semimetallic ceramics are lead oxide (PbO), ruthenium
>dioxide (RuO2), bismuth ruthenate (Bi2Ru2O7), and bismuth iridate
>(Bi2Ir2O7). Like metals, these materials have overlapping electron
>energy bands and are therefore excellent electronic conductors. They
are
>used as "inks" for screen printing resistors into thick-film
>microcircuits. Inks are pulverized conductor and glaze particles
>dispersed in suitable organics, which impart the flow properties
>necessary for screen printing. On firing, the organics burn out as the
>glazes fuse. By varying the amount of conductor particles, it is
>possible to produce wide variations in the resistance of thick films."
>Britannica.com
>
>I would presume the use of lead in this instance is exempt. I would
>consider fused lead oxide as a ceramic. That is my interpretation.
>Comments?
>Bev
>RIM
>
>
------------------------------------------------------------------------
-------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
-------------------------------------------------------------------------------
|
