Degradation of FR406 begins ~ 230 C and will not withstand TC above this very well. I suggest trying this material as a control with an experimental lot of a filled material like IS415 is you like Isola. You may find that FR408 works well for you application as well - it has a higher Td than FR406 and is slightly more in cost. Testing is the key which should include some package analysis after the TC processes - DSC, TMA, TGA, DMA, etc. Jeffrey Bush Director, Quality Assurance and Technical Support VERMONT CIRCUITS INCORPORATED 76 Technology Drive - POB 1890 Brattleboro, Vermont 05302 Voice: 802.257.4571.21 Fax: 802.257.0011 http://www.vtcircuits.com -----Original Message----- From: Kerry McMullen [mailto:[log in to unmask]] Sent: Wednesday, May 11, 2005 1:03 PM To: [log in to unmask] Subject: [TN] FR406 Tg 175 Degrees C - Lead Free Processing Hi TechNetters Can I use FR406 175 Degrees C laminate during a lead free assembly process where the reflow temp will be around 260 Degrees C. ? The boards will be ENIG. Any disadvantages. I know there was a thread, but I can't find it. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts 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 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts 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 -----------------------------------------------------