David, I don't have all the data you requested, but perhaps this will help. FR-2 is a phenolic resin system with a paper base. CEM-1 is an epoxy resin system with a paper-glass composite base. Flexural Strengths, (lbs/in^2): Lengthwise: Crosswise: FR-2: 12 000 10 500 CEM-1: 35 000 28 000 CTE (ppm/deg C): FR-2: 12-25 Source: Electronic Packaging and Interconnection Handbook (Harper) Kind Regards, Bryan Douglas Alcatel Richardson, Texas ----- Begin Included Message ----- >From [log in to unmask] Mon Oct 9 10:27:48 1995 Resent-Date: Mon, 9 Oct 95 13:33:58 bst Old-Return-Path: <miso!lut.ac.uk!D.C.Whalley> Date: Mon, 9 Oct 95 13:33:58 bst From: David Christopher Whalley <[log in to unmask]> To: [log in to unmask], [log in to unmask], [log in to unmask] Subject: FR2/CEM1 laminate properties Resent-Message-Id: <"q76vT2.0.5LD.DFJUm"@ipc> Resent-From: [log in to unmask] X-Mailing-List: <[log in to unmask]> archive/latest/1317 X-Loop: [log in to unmask] Resent-Sender: [log in to unmask] Content-Length: 193 Does anyone have any data on the properties of FR2/CEM1, I am particularly interested in TCE, Tg and Young's modulus. Thanks in advance. David Whalley Loughborough University of Technology ----- End Included Message -----