Laser reflection spot as a pattern in a diamond coating: A microscopic study

Diamond coatings were deposited by the synchronous and coupled action of a hot filament CVD method and a pulsed CO2 laser in spectro-absorbing and spectro-non-absorbing diamond precursor atmospheres. The obtained coatings were structured/patterned, i.e., they were comprised of uncovered, bare locations. An extra effect observed only in the spectro-active diamond precursor atmosphere was the creation of another laser spot in the coating - a reflection spot. In order to establish the practical usability of the latter one, extensive microscopic investigations were performed with consideration of the morphology changes in the spot of the direct laser beam. Normal incidence SEM images of this spot showed a smooth surface, without any pulse radiation damage. AFM imaging revealed the actual surface condition and gave precise data on the surface characteristics. Dijamantske prevlake deponovane su spregnutim i sinhronim delovanjem metode usijanog vlakna HDP i impulsnog CO2 lasera u spektroapsorbujucoj i spektroneapsorbujucoj atmosferi dijamantskog prekursora. Dobijene prevlake su strukturirane/isarane, tj. sadrze neprekrivene, ogoljene oblasti. Dodatni efekat, zapazen samo u spektroaktivnoj atmosferi dijamantskog prekursora, jeste formiranje jos jednog laserskog spota u prevlaci-refleksionog spota. Opsezna mikroskopska istrazivanja uradjena su imajuci u vidu morfoloske promene u spotu direktnog laserskog zraka, sa ciljem da se utvrdi prakticna upotrebljivost refleksionog spota. SEM mikrografije normalne incidencije ovog spota pokazuju glatku povrsinu bez ostecenja impulsnim zracenjem. AFM tehnika vizualizacije otkrila je pravo stanje povrsine i dala je precizne podatke o njenim karakteristikama.