Address,
     
     Due to etch factors it is not always advantageous to have cores with 
     2/1oz copper core.  Our design does allow for use of 1/1oz copper.  
     
     Assuming a horizontal etcher (or any etcher, verticle included), how 
     successful are many of you in etching an unbalanced core of 2/1oz?  
     Are your starts 5 to 10% more than a typical 1/1oz or .5/.5oz copper?  
     Other than normal corrections (i.e. balance copper planes, oscillating 
     spray bars, clean nozzles, cone footprints, etc, etc) what other 
     variables should I be looking at or compensating for?  
     
     NOTE:      This is an eight layer foil, with three cores; 2 - 2/1oz 
                and 1 - 1/1 oz, signal/plane receipe.
     
     Please advise.  Thank you.
     
     John Gulley 

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