You have several options. You can buy single ply thin core material constructed using 1080 glass style providing almost exactly the thickness you require (about 2.5 mils) but you may need to order it with the ED copper tooth side facing out so no shorting will occur or you may be able to get the material, if available at all , using rolled copper that has been annealed much the way most flexiible circuit and patented capacitance material is produced. If you decide to go thinner, 106 glass style material is your best choice and, it so happens, is supplied by one of the low dielectric constant material suppliers but beware patent infringements. As for the Dk, you have choices as well. I will provide you a material matrix, off forum of course, so you can pick and choose. However, some of these materials are not easy to process in any board shop let alone one not well process managed for it. These materials come in under 3.0 for your dielectric requirements. MoonMan ----- Original Message ----- From: "SDC's Tech Net" <[log in to unmask]> To: <[log in to unmask]> Sent: Thursday, September 05, 2002 8:29 PM Subject: [TN] Looking for very thin, Low Dk and Low loss material > Hello everybody, > I am in need of core material and prepreg material with very low > Di-electric constant(Dk) and low loss factors.Dk is about 3.0 or less with > very thin profile of the material.Di-electric thickness spec will be 2.4mil > or less.Any help on the subject will be appriciated. > > Thank you all > Kris Vasoya > VP of Operations. > Thermal Works > ph:714-540-8454 Ext:136 > fax:714-540-1299 > e-mail: [log in to unmask] > www.thermalworks.com > > -------------------------------------------------------------------------- ------- > 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 > -------------------------------------------------------------------------- ------- > --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------