Frank:
     
     Try investigating CEM1.  This is a paper phenolic material with a 
     layer of fiberglass on top.  Much stronger than FR-2 and is used by 
     the Japanese and other Asian manufacturers for SMT quite often.  You 
     can not have plated thru holes.  THru holes need to be silver plated 
     thru holes.  Silver plated thru holes are a polymer thick film made 
     conductive with silver particles.  THis is screened into holes to make 
     a connection from the top to the bottom of the board.
     
     Regards:
     Steve [log in to unmask]
     


______________________________ Reply Separator _________________________________
Subject: Re: FR2 Printed Circuit Boards
Author:  Non-HP-FNKEC ([log in to unmask]) at HP-Vancouver,shargw2
Date:    10/22/96 8:16 PM


Frank,
Don't do it!
FR2 and SMT are not a good mix.
I only use FR2 on small thru hole PCBs.
I fear you will have serious yeild problems that would cost considerably more 
than FR4 will. FR2 will warp considerably and cause component level problems 
after reflow.
FNKEC
     
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