LISTSERV - LEADFREE Archives - LISTSERV.IPC.ORG

LEADFREE Archives

June 2006

Leadfree@IPC.ORG

	LISTSERV Archives
	LEADFREE Home
	LEADFREE June 2006

	Log In
	Register

	Subscribe or Unsubscribe

	Search Archives

Options:	Use Monospaced Font Show Text Part by Default Show All Mail Headers
Message:	[<< First] [< Prev] [Next >] [Last >>]
Topic:	[<< First] [< Prev] [Next >] [Last >>]
Author:	[<< First] [< Prev] [Next >] [Last >>]

Subject:	Clarification sought on Pb-containing ceramic
From:	Bev Christian <[log in to unmask]>
Reply To:	(Leadfree Electronics Assembly Forum)
Date:	Mon, 26 Jun 2006 08:41:49 -0400
Content-Type:	text/plain
Parts/Attachments:	text/plain (32 lines)

"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

---------------------------------------------------------------------
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
-------------------------------------------------------------------------------

ATOM RSS1 RSS2

LISTSERV.IPC.ORG