Mail*Link(r) SMTP FWD>FAB: PCB Materials Denis-- Memory seems to recall seeing a product announcment for either a base material and/or prepreg. Rogers markets a high dielectric constant (dk) material with a dk in the range of 9-10 for an organic equivalent of alumina. Many years ago, we made some custom material using a loaded epoxy and glass fabric (2 plys of a 116), we loaded the resin with a ceramic powder - titanium dioxide with dk>75 (or some of the titanates) could be used. dk was about 12, and conductor adhesion was marginal (but acceptable for the experiment). Ralph Hersey e-mail: [log in to unmask] -------------------------------------- Date: 4/2/96 12:52 PM From: [log in to unmask] 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] ------------------ RFC822 Header Follows ------------------ Received: by quickmail.llnl.gov with SMTP;2 Apr 1996 12:51:05 -0800 Received: from ipc.org by simon.ipc.org via SMTP (940816.SGI.8.6.9/940406.SGI) id OAA25299; Tue, 2 Apr 1996 14:42:01 -0800 Resent-Date: Tue, 2 Apr 1996 14:42:01 -0800 Received: by ipc.org (Smail3.1.28.1 #2) id m0u4Ad1-00008QC; Tue, 2 Apr 96 12:16 CST Resent-Sender: [log in to unmask] Old-Return-Path: <[log in to unmask]> From: [log in to unmask] X-Openmail-Hops: 1 Date: Tue, 2 Apr 96 10:20:09 -0800 Message-Id: <H00000f1051d6967@MHS> Subject: FAB: PCB Materials To: [log in to unmask] Resent-Message-ID: <"UOiHJ2.0.hCH.gxMOn"@ipc> Resent-From: [log in to unmask] X-Mailing-List: <[log in to unmask]> archive/latest/3267 X-Loop: [log in to unmask] Precedence: list Resent-Sender: [log in to unmask]