Rich,
The one to answer this would probably be Lamar Young at SCS in 
Indianapolis.  I know that in our Parylene machines, we regularly clean 
the pyrolysis tube where the dimer decomposes to the monomer and the 
reaction occurs.  I don't think contaminants on the board would have much 
effect, other than perhaps interfering with adhesion.  Do you have much 
unused dimer at the end of a deposition run?  If so, does it look really 
burnt?  Is your dimer powder old or has it been stored improperly?

Doug Pauls



From:   Richard Kraszewski <[log in to unmask]>
To:     <[log in to unmask]>
Date:   08/28/2013 03:54 PM
Subject:        [TN] Poisoning of Parylene Polymerization
Sent by:        TechNet <[log in to unmask]>



Is anyone aware of any specific contaminants that can poison the 
polymerization process in parylene type coatings? 

Rich  Kraszewski 
 
 

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