US Patent 7771823 - Atomically smooth nanocrystalline diamond film

http://ip.com/patent/US7771823

This patent from Nanotech LLC teaches a scratch and wear resistant nanocrystalline diamond film with a smoothness approaching atomic levels. Claim 1 reads:

1. A substrate at least partially coated with 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.