Geoff, we've just been through press-fit testing and did an FR4 poly/glass comparison as I was also concerned about laminate cracking. Have to say I was pleasantly surprised and we didn't find anything untoward (used ERNI connectors). Have yet to look at the newer filled high Tg FR4's, but based on the poly/glass result I wouldn't expect problems Regards Ian Fox Goodrich ECS -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Geoff Layhe of Lamar Group Sent: 08 November 2005 17:29 To: [log in to unmask] Subject: [TN] Press-fit pins and polyimide laminate Does anybody have information about the suitability of polyimide (or any other high temp laminate) with press fit pins. It doesn't seem a good idea to me to use them with poyimide being more brittle than FR4 but are there any guidelines anywhere? Geoff Layhe Private & Confidential: This e-mail message is confidential and is intended solely for the person or organisation to whom it is addressed. If the message is received by anyone other than the addressee please return the message to the sender by replying to it and then delete the message from your computer. --------------------------------------------------- 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 -----------------------------------------------------