Just as important as peak temp is time above solidus (180 C). This 
     should be absolutely less than 90 sec, but try for about 30 sec. Less 
     is better.


______________________________ Reply Separator _________________________________
Subject: ASSY: Gold-to-Gold Soldering
Author:  [log in to unmask] at Internet
Date:    9/30/96 6:25 PM


          Does anyone have experience soldering gold-plated SMT components to 
          gold-plated PCB's using a eutectic (Sn63/Pb37) solder? The solder 
          joints exhibit a dull, grainy appearance. Although I know that longer 
          liquidus dwell times and a maximum reflow temperature of 220 C are 
          typically recommended when soldering to gold,  will other solder 
          alloys perform better (i.e,, Indium alloys)?
     
          Thanks in advance,
     
          Greg Kilinski
          Acuson Corp. 
          [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.        *
***************************************************************************