Bill,
The air plasma (N2 + O2) oxidizes the carbon to CO2. This is the basis of a lot of plasma cleaning - the oxidation produces a volatile oxide.
Don
**
Guys,
This propane-tank vacuum metallization system of James Lerch at
is by far one of the coolest
hobby devices I have ever encountered!
Thanks for posting that and thanks for the good work! You are
indeed a bad influence on us susceptable types...
Now, I've been digging around over at the SVC site and have
encountered a few interesting documents. One is
, sort of a brief (66) page
history of vacuum coating. On page 41, reference E-27 the author
refers to John Strong coating the Palomar mirror with lanolin prior
to metallization. Looks like this is a possible alternate approach
to the meticulous cleaning phases some of the ATMers are doing? Apparently the O2 glow plasma will burn it off well enough, but I
guess I would have thought that would leave carbon etc behind on the
surface?
I've misplaced my own copy of Strong's Experimental Physics. Might have to buy a replacement.
Other interesting historical accounts from the masters of the
vacuum costing field are at:
Comments? Let me qualify my own comments by the fact that I have
no idea what I am doing but I do it anyway. :)
-Bill
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Donald M. Mattox
Technical Director
Society of Vacuum Coaters
71 Pinon Hill Place NE
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