Poh:
     Do you have any vias in the pads, or a short run from a trace to the 
     pad of the QFP?  If you have a via in the pad or trace, you might mask 
     or plug that via before wave soldering.


______________________________ Reply Separator _________________________________
Subject: Assy: Lifted lead (QFP)
Author:  <[log in to unmask]> at INTERNET
Date:    3/24/97 5:38 PM


     
Hello everyone,
     
I would like to know if anybody has ever encountered lifted lead after reflow 
soldering.
     
The coplanarity of the QFP is OK, with no lifted lead. However, it only 
happened after when the board is reflow, and it only happen on only 
one part number.
     
Any idea of what is really going on.
     
     
Poh
     
*************************************************************************** 
* TechNet mail list is provided as a service by IPC using SmartList v3.05 * 
*************************************************************************** 
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   * 
* with <subject: subscribe/unsubscribe> and no text in the body.          * 
*************************************************************************** 
* 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]      * 
***************************************************************************
     
     


***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   *
* with <subject: subscribe/unsubscribe> and no text in the body.          *
***************************************************************************
* 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]      *
***************************************************************************