An ultrasmooth diamond film has a thickness greater than about ten microns and an average grain size less than about 0.5 micron. The ultrasmooth diamond film of the present invention is grown using ordinary microwave plasma CVD methods, with a metal vapor source included in the reactor to produce vapor...http://www.google.fr/patents/US5571616?utm_source=gb-gplus-shareBrevet US5571616 - Ultrasmooth adherent diamond film coated article and method for making same
Ultrasmooth adherent diamond film coated article and method for making same