Scottish Mountain Dew! - God, I miss that stuff, taken in its natural environment! Peter Geoff Layhe <[log in to unmask]> 29/04/2003 12:12 AM Sent by: TechNet <[log in to unmask]> Please respond to "TechNet E-Mail Forum."; Please respond to Geoff Layhe To: [log in to unmask] cc: (bcc: DUNCAN Peter/Asst Prin Engr/ST Aero/ST Group) Subject: Re: [TN] PCB Material Question Carl, The tan laminate is more than likely to be either FR2 or FR3. Both are paper based, FR2 is phenolic resin, Fr3 is epoxy resin. The IPC references are:- FR2 = IPC 4101/03. FR3 = IPC 4101/04. BTW Doug, CEM1&3 aren't cyanate ester laminates. CEM 1 is a paper core with a woven glass surface bonded with phenolic resin. CEM3 is is a non-woven glass core with a woven glass surface bonded with epoxy resin. OK class over for the day. Time to get some Scottish Mountain Dew. Geoff Layhe -----Original Message----- From: [log in to unmask] [mailto:[log in to unmask]] Sent: Friday, April 25, 2003 4:40 PM To: [log in to unmask] Subject: Re: [TN] PCB Material Question Carl, the tan material you see is probably CEM-1 or CEM-3. CEM stands for Cyanate Ester - Modified. It is a low cost laminate that is more often punched than routed, and usually single sided. Never used in Class 3 electronics (at least by smart people). Usually only class 1 stuff. ? --------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- 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 free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- [This e-mail is confidential and may also be privileged. If you are not the intended recipient, please delete it and notify us immediately; you should not copy or use it for any purpose, nor disclose its contents to any other person. Thank you.] --------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------