Really???? No catalyst on the PTH line? No alkaline etchant? No reflow/HASL flux? Need I go on? It may be that this is not their fault. However, they have a VERY unique board shop if they don't use one or more of these processes. I suggest they could be more cooperative in helping to get to the root of the problem. Dave Sullivan Rockwell Collins, Inc. [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: ASSEM: Copper Choride problem Author: [log in to unmask] at ccmgw1 Date: 1/8/97 8:02 AM Hi, Recently we encountered some assembled PCB returned from the field where humidity is high and temp is low. Some vias and pads were found to be corroded with copper chloride after SEM analysis and when corrosion production were removed from the board, the affected part of the vias was degraded. This has greatly affected the performance of the circuit. The fabrication house claimed that they are not liable as there was not chloride chemical used in their processes. Does anyone has any insights to share? Could the assembly process contribute to this corrosion? Thanks in advance for any information shared. stella yap *************************************************************************** * 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. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * *************************************************************************** Received: from by ccmgw1.cacd.rockwell.com (SMTPLINK V2.11) ; Wed, 08 Jan 97 08:02:20 cst Return-Path: <[log in to unmask]> Received: from stealth.cacd.rockwell.com (stealth) by mailserv with ESMTP (1.40.112.8/16.2) id AA002030838; Wed, 8 Jan 1997 02:07:18 -0600 Received: by stealth.cacd.rockwell.com; id CAA25923; Wed, 8 Jan 1997 02:07:22 -0600 Received: from ipc.org(168.113.24.64) by stealth via smap (V3.1.1) id xma025921; Wed, 8 Jan 97 02:06:59 -0600 Received: from ipc.org by simon.ipc.org via SMTP (940816.SGI.8.6.9/940406.SGI) id BAA07813; Wed, 8 Jan 1997 01:58:24 -0800 Resent-Date: Wed, 8 Jan 1997 01:58:24 -0800 Received: by ipc.org (Smail3.1.28.1 #2) id m0vhssK-0000SBC; Wed, 8 Jan 97 01:56 CST Resent-Sender: [log in to unmask] Old-Return-Path: <es500yap@pts7> Date: Wed, 8 Jan 1997 16:00:07 +0800 From: [log in to unmask] ( YAP CHOW LAN) Message-Id: <[log in to unmask]> To: [log in to unmask] Subject: ASSEM: Copper Choride problem Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Md5: lhd0uu5MiHDmLWRELG6qqw== Resent-Message-Id: <"2cjg-3.0.Q_6.rCrqo"@ipc> Resent-From: [log in to unmask] X-Mailing-List: <[log in to unmask]> archive/latest/9043 X-Loop: [log in to unmask] Precedence: list Resent-Sender: [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. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************