Hi!
     
     Accelerated aging factor for a new PCB surface finish? Do you mean 
     oxidation? Intermetallic growth? What type of finish? Please send 
     additional detailed info covering your request.
     
     
     
     Dave Hillman
     Rockwell Collins
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______________________________ Reply Separator _________________________________
Subject: ASSY:  calculation of accelerated aging factor
Author:  [log in to unmask] at ccmgw1
Date:    7/9/96 2:25 PM


Colleages in PCB industry, 
     
I am a process engineer new in this field, and I am currently searching 
for a mathematical formula (or a mathematical model), either physical or 
empirical, to calculate the accelerated aging factor for a new PCB surface 
finish, inside of a temperature/humidity chamber with constant temperature 
as T and constant relative humidity level as RH.  Thanks in advance for 
your help.
     
Nora Xiao
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