US Patent 7306778 - Smooth nanocrystalline diamond film

http://www.freepatentsonline.com/7306778.html

Diamond nanocrystalline films have advantages of hardness, wear resistance, electrical insulation, and thermal conductivity but the inclusion of polymer or graphite materials degrade these benefits. This patent from Nanotech Capital teaches fabrication methods that eliminate these defects to produce a purer and smoother diamond film coating. Claim 1 reads:

1. A film comprising a nano-crystalline diamond matrix, wherein the nano-crystalline diamond matrix is substantially free of graphite inclusions and wherein the film has an average root mean square surface roughness of less than 5.00 nm.