Correct! However, if your building high temperature materials like
     polyimide, Cyanate Ester, or PPO blends, then you need to keep the
     oxide deposit at a <thin> controlled deposit thickness. Or else the
     tall crystalline structures of the oxide will snap at the base and 
     separate similar to what's described. It's best to use a brown or
     red oxide which is short and nodular in structure. (Kinda like a
     field of mushrooms) Not like the old black oxide. (Which was more
     like a forest of feather like trees.)
     This is why I needed more insight into what materials and press cycles
     might be used.
     
     Groovy
______________________________ Reply Separator _________________________________
Subject: Re: Re[2]: FAB Delamination
Author:  [log in to unmask] at SMTPLINK-HADCO
Date:    6/2/96 2:12 PM


Dave Hoover:
     
Help me out here please.  From the point of view of the inexperienced, it 
seems that when the delamination occurs at the copper/oxide interface, it 
seems to the uninitiated that it is simply because the bond between the oxide 
ant the prepreg is stronger than the bond between the oxide and surface.  So, 
if you had a VERY GOOD oxide, it would perform like this, as you want the 
oxide/copper bond to be the weak link.  True??
     
Where is the hole in my logic??
     
Rudy Sedlak