Karl,

    My experience with panelized boards says that you are experiencing a very
high fallout for a 2 layer, 2 up panel. I would get to the root cause of the
reject rate right away or change suppliers.

    We've used "press-in" panels from time to where the routed boards are 
inserted to a routed frame, but no glue in boards. I would think the labor to 
glue the boards would be quite high as is the press-in process.

    I'd expect that you would experience problems in insertion, onsertion or 
at soldering where the heat might effect the "glue".

Harry Parkinson
Digital Equipment Corp
  
From:	US2RMC::"[log in to unmask]" "MAIL-11 Daemon" 19-FEB-1996 18:09:50.54
To:	IPC Technet <[log in to unmask]>
CC:	
Subj:	X-OUTS


We are currently using a 2 layer FR-4 board as a 2-up panel in our assembly 
factory and our board vendor has asked us if we are able to use x-outs. 
 Currently, we are not able to use x-outs given our equipment and line rate. 
 They say that this problem is causing 6%-8% fallout and want to increase 
our cost.  Consequently, our vendor has asked us if we can accept boards 
that have two good boards glued together into a panel.  They claim that 
there will be little difference between the panels and want to move forward 
with a trial run.

Does anyone else produce / use glued boards?
Is this fallout unusually high?
What are some problems we should look out for?

Any information is greatly appreciated!

Karl Kaylor
[log in to unmask]


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