Just a word of warning, there have been several TechNet  e mails about this 
first drill approach being dangerous if an alternative to electroless copper 
system is in use and any circuitry does not have a clearance around the 
nonplated hole as the alternatives do leave the hole with a unremoved 
conductive layer that can result in leakage.  Reportedly it is not like the 
electroless where you can remove all the plating.
 ----------
From: [log in to unmask]
To: [log in to unmask]
Subject: Re: MISC: drill files 1 or 2
Date: Wednesday, September 25, 1996 1:59PM

     Since the effort is made to drill as many of the holes in the
     primary drill operation as possible, we prefer that the drill
     be sent as one file to reduce the number of steps in the
     CAM operation. Non-plated holes are only drilled in a
     secondary operation if they cannot be tented in the imaging
     plating operation.
        Don Bloye
     PC World


______________________________ Reply Separator
_________________________________
Subject: MISC: drill files 1 or 2
Author:  [log in to unmask] at INET
Date:    9/25/96 2:04 PM


Hi - :)
   What is prefered from the fabricators point of view:
   One drill files containing both plated and non-plated holes?
                           or
Two drill files one plated the other non-plated?
   Reasons?
       ---------------------------
John Laur
Rockwell Automation
Allen-Bradley Co Inc.               1201 South Second Street
Milwaukee, WI 53204
+1 414 382 2162 (fax)
+1 414 382 2393 (phone)
   [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.        *
***************************************************************************

***************************************************************************
* 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.        *
***************************************************************************