Hi Kaye, The 2001 IPC Expo in Anaheim had a session I attended on "green" FR-4. As memory serves, Polyclad, Isola and Nelco presented papers including an excellent one on non-bromated FR-4. They covered the challenges of balancing alternative flame retardant additives while maintaining typical FR-4 properties (Tg, dimensional stability, Dk, etc.). I'm sure the laminate suppliers (Isola, Polyclad, Nelco, Rogers, Matsushita, etc.) can tell you what they have available - might even be on a webpage. Or, if you have the IPC Proceedings CD-ROM the papers should be in there (now where'd I file that thing.) Hans Integrity First - Service Before Self - Excellence in All We Do ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Hans M. Hinners Electronics Engineer Warner Robins - Air Logistics Center (WR-ALC/LUGE) Special Operations Forces System Program Office (SOF - SPO) Gunship Team 226 Cochran Street Robins AFB GA 31098-1622 mailto:[log in to unmask] Com: (478) 926 - 5224 Fax: (478) 926 - 4911 DSN Prefix: 468 -----Original Message----- From: Kaye Knotts [mailto:[log in to unmask]] Sent: Thursday, October 11, 2001 12:15 PM To: [log in to unmask] Subject: [TN] Alternative to FR-4 Dear Technetters, I have been asked a question that I need help answering. Is there a printed circuit board base material that would meet the same specs as multi-functional FR-4 and does not use Bromine in the flame retardant chemistry. Can someone answer the question or point me in the right direction. Thank you very much. Kaye Knotts Keithley Instruments Solon, Ohio ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free 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 Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free 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 Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------