======== Original Message ======== Sender: [log in to unmask] Received: from simon.ipc.org (IPC.ORG [168.113.24.64]) by arl-img-7.compuserve.com (8.6.10/5.950515) id UAA18147; Wed, 30 Oct 1996 20:18:24 -0500 Received: from ipc.org by simon.ipc.org via SMTP (940816.SGI.8.6.9/940406.SGI) id TAA13511; Wed, 30 Oct 1996 19:12:12 -0800 Resent-Date: Wed, 30 Oct 1996 19:12:12 -0800 Received: by ipc.org (Smail3.1.28.1 #2) id m0vIi4k-0000VaC; Wed, 30 Oct 96 15:21 CST Resent-Sender: [log in to unmask] Old-Return-Path: <[log in to unmask]> From: [log in to unmask] Date: Wed, 30 Oct 96 14:10:58 MST Message-Id: <[log in to unmask]> To: [log in to unmask] Subject: FAB: Post-Lam Bake Resent-Message-ID: <"jXdBS2.0.W23.4RyTo"@ipc> Resent-From: [log in to unmask] X-Mailing-List: <[log in to unmask]> archive/latest/7227 X-Loop: [log in to unmask] Precedence: list Resent-Sender: [log in to unmask] What is a typical cycle for baking FR4, rigid, multilayers after lamination? Why is this bake necessary? Any information would be greatly appreciated. *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** ======== Fwd by: Tony King / N ======== Bake is not standard and not required for FR-4 after lamination, I have seen companies bake at that stage, but usually to make up for non-standard issues like incomplete cure in the press or post lamination stress relief to minimize warpage, or when vacuum lamination is not used. Some people have baked after drill thinking that etch back/desmear is improved. Some laminates have a very long press cycle (cyanate ester for example), a post lamination bake is often used to minimize time in a press when press capacity is a problem. If baking is required, the cycle used depends on the reason for the bake. It is difficult to specify one bake cycle to meet the variety of different reasons. If you have specifics, call me and I would be happy to discuss it. Tony King Elexsys International Inc. Nashua N.H. Phone: 603-886-0066 Fax: 603-886-9724 [log in to unmask] *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************