Polyclad (Cookson) is getting the licensing from GE to make Getek, but it isn't on line yet. Until they start making what was Getek, I don't think Polyclad had a PPO/epoxy resin system. They do (or did?) have a PPE (like former Nelco 6000-21) resin. I believe that was LD-621. Don't know if it's available still. Tim Reeves -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of McGlaughlin, Jeffrey A Sent: Wednesday, February 25, 2004 8:47 AM Subject: Re: IPC-4101 Material The generic reference is to PPO (polyphenylene oxide) Epoxy/Glass laminate. There are several manufacturers making this type of laminate, Polyclad and Matsushita are two that come to mind. My doc's on these materials show Er as [log in to unmask] The curve for frequency is fairly flat from what I remember With a high of around 3.8-4.6 at 10GHz. By the way GeTek is no longer GeTek, GE sold the division off and was closing the manufacturing plant where it was made. I can't remember who bought the rights to manufacture the materials. Hope this helps, Jeffrey A McGlaughlin, CID Engineering Designer Battelle Memorial Institute Columbus Ohio http://www.battelle.org [log in to unmask] -----Original Message----- From: Marsico, James [mailto:[log in to unmask]] Sent: Wednesday, February 25, 2004 10:42 AM To: [log in to unmask] Subject: [TN] IPC-4101 Material Good day... Our designers want to use an FR-4 material which is designated as IPC-4101/25. The /25 material has a permittivity of 4.4, while the other FR-4 materials (/21and /24) are listed as 5.4. I found out that GETEK is classified as /25, and was wondering if this is the only /25 material available. Is there a generic (or product) name for the /25 material? The slash sheets in 4101 have a maximum permittivity at 1 Mhz, do the graphs exist that show the Dk at various frequencies? Jim Marsico Senior Engineer Production Engineering EDO Electronics Systems Group [log in to unmask] <mailto:[log in to unmask]> 631-595-5879 --------------------------------------------------- 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 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- 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 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- 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 847-509-9700 ext.5315 -----------------------------------------------------