We had the same problems when we wanted immersion gold and got electroplated gold. The immersion gold /electroless nickel product was "transparent" in our process developed for HASL solder. [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: Re: assy-Immersion gold fini Author: [log in to unmask] at ftl03 Date: 8/22/96 3:13 PM RE>assy:Immersion gold finishes 8/22/96 Stephen, We had some boards which had been spec'ed to be immersion gold over = electroless nickel with which we had limited success, as well. When we = did some in-depth checking, however, we discovered that it was actually = electrolytic gold over electrolytic nickel, and in places the gold = thickness was in the several hundred microinch range (as opposed to 3-8 = for immersion). We attribute the soldering difficulties to this. In the limited tests that we have performed with i.Au/e.Ni, we've had = great success soldering with conventional soldering chemistries and = processes. Regards, Greg Bartlett Mercury Computer Systems Chelmsford, MA [log in to unmask] -------------------------------------- Date: 8/22/96 2:07 PM To: Greg Bartlett From: STEPHEN WELDON I am currently venturing into the world of pcb metallic finishes. I = have acquired some pcb's with immersion gold on them and have met with = what seems to be limited success. I was wondering if there are any tricks = of the trade for processing these style boards thru a conventional = SMT/Wave solder process? If a different formulation other than 63/37 = solder paste is recommended? and who it stacks up to the OSP coatings? Stephen Weldon Manufacturing Engineer Diagnostic Instrument Co. [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. = * ***************************************************************************= ------------------ RFC822 Header Follows ------------------ Received: by mailgate.mc.com with SMTP;22 Aug 1996 14:03:45 -0400 Received: from firewall.mc.com (firewall [192.148.197.15]) by jericho = (8.6.11/8.6.11) with SMTP id OAA25399 for <[log in to unmask]>; Thu, 22 = Aug 1996 14:03:26 -0400 Received: by firewall.mc.com id AA01525 (5.65c/IDA-1.4.4 for <[log in to unmask]>); Thu, 22 Aug 1996 14:03:23 = -0400 Received: from ipc.org(168.113.24.64) by firewall via smap (V1.3) id sma001519; Thu Aug 22 14:03:04 1996 Received: from ipc.org by simon.ipc.org via SMTP = (940816.SGI.8.6.9/940406.SGI) id MAA11054; Thu, 22 Aug 1996 12:53:21 -0700 Resent-Date: Thu, 22 Aug 1996 12:53:21 -0700 Received: by ipc.org (Smail3.1.28.1 #2) id m0utdEg-0000RWC; Thu, 22 Aug 96 12:08 CDT Resent-Sender: [log in to unmask] Old-Return-Path: <[log in to unmask]> Message-Id: <[log in to unmask]> From: STEPHEN WELDON <[log in to unmask]> Date: Thu, 22 Aug 1996 13:07:00 Subject: assy:Immersion gold finishes X-Mailer: Internet Series for Microsoft Mail ( V2.0 ) Organization: Diagnostic Instrument Corporation Mime-Version: 1.0 To: [log in to unmask] Resent-Message-Id: <"7Mn5N3.0.92B.nF97o"@ipc> Resent-From: [log in to unmask] X-Mailing-List: <[log in to unmask]> archive/latest/5899 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. * *************************************************************************** *************************************************************************** * 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. * ***************************************************************************