Andy; CTE = 7-9 ppm/degree C Dk (w/ hi temp epoxy) = 3.9 Dk (w/ polyimide) = 3.6 Tg (w/ hi temp epoxy) = 150-180C Tg (w/ polyimide) = 210-250C sources: Arlon, Dielektra GmbH, Isola Werke, NELTEC, and Polyclad NH this is all from a DuPont brochure dated 2/20/96 there is a phone # for additional info: 800/453-8527 Hope it helps Fred J. By the way; I understand water absorbtion is a big issue with this material (becasue of the aramid fiber). >>> Electr1998 <[log in to unmask]> 01/16/98 09:29am >>> Can anybody give me the following info on Thermount? Tg CTE Dk Thanks! Andy ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################