Denis, Rogers corporation makes various types of laminates with dielectric constants from 2.2 to 10.2. Some of these materials are PTFE based (RT/duroid and RO3000 products) while others are thermoset plastic (TMM and RO4000 products). The RT/duroid and TMM materials are targeted for military and high performance applications while the RO3000 and RO4000 materials are for commercial applications. If you want to see our home page this is the URL http://www.rogers-corp.com or you can give me a call when I get back to the office (602 961-1382). Thanks. Art Aguayo, Technical Services/Applications Engineer [log in to unmask] http://www.rogers-corp.com ______________________________ Reply Separator _________________________________ Subject: FAB: PCB Materials Author: DENIS_MORI::(DENIS) at ~FABRIK Date: 4/2/96 10:20 AM From: [log in to unmask] Date: Tue, Apr 2, 1996 10:20 AM Subject: FAB: PCB Materials To: TechNet Item Subject: cc:Mail Text Hello, Does anyone have information on PCB materials with a dielectric constant of 5.5 (or higher)? We are trying to reduce trace impedances on a standard (59-mil dielectric) thickness 2-layer board while using reasonable trace widths. Thanks, Denis Mori [log in to unmask]