We are also looking at using FR-2.  Does anyone have any information 
     on process capabilities. i.e. hole tolerances, hole to hole, hole to 
     edge, trace width, etc.
     
     Thanks:
     
     Steve O'Hara


______________________________ Reply Separator _________________________________
Subject: FR2 Printed Circuit Boards
Author:  Non-HP-glackin ([log in to unmask]) at HP-Vancouver,mimegw2
Date:    10/18/96 5:13 AM


Were starting a new product next January, using an FR2 PCB. I would be 
grateful for answers to any of the following questions.
     
(1) What precautions (process procedures) should we use to stop the boards 
warping as they     go through the reflow oven? I would be interested to 
hear from anyone who send FR2     PCBs through a reflow oven.
     
(2) What is the ideal temperature for storing FR2 PCBs? 
    We use a selective wave-soldering process for soldering PTH components.
After going     through the reflow oven, how long and at what storage 
temperature should we keep the     FR2 PCBs, before we send the boards 
across the wave-soldering machine.
     
(3) What PCB specifications should we give our PCB suppliers, so that the 
FR2 boards can      be used effectively as it goes through the process (e.g. 
so that the boards don't warp     as they go through the reflow oven)?
     
Thanks,
     
Frank Glackin.
     
*************************************************************************** 
* 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.        *
***************************************************************************